357 files changed, 13335 insertions, 5051 deletions

diff --git a/.gitignore b/.gitignore
index 8d14531846b9..8363e48cdcdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,6 +17,7 @@
 *.i
 *.lst
 *.symtypes
+*.order
 
 #
 # Top-level generic files
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 6a4adcae9f9a..560f88dc7090 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -86,9 +86,21 @@ Alex is working on a new set of patches right now.
 When mounting an ext4 filesystem, the following option are accepted:
 (*) == default
 
-extents                 ext4 will use extents to address file data.  The
+extents         (*)     ext4 will use extents to address file data.  The
                         file system will no longer be mountable by ext3.
 
+noextents               ext4 will not use extents for newly created files
+
+journal_checksum        Enable checksumming of the journal transactions.
+                        This will allow the recovery code in e2fsck and the
+                        kernel to detect corruption in the kernel.  It is a
+                        compatible change and will be ignored by older kernels.
+
+journal_async_commit    Commit block can be written to disk without waiting
+                        for descriptor blocks. If enabled older kernels cannot
+                        mount the device. This will enable 'journal_checksum'
+                        internally.
+
 journal=update          Update the ext4 file system's journal to the current
                         format.
 
@@ -196,6 +208,12 @@ nobh			(a) cache disk block mapping information
                         "nobh" option tries to avoid associating buffer
                         heads (supported only for "writeback" mode).
 
+mballoc         (*)     Use the multiple block allocator for block allocation
+nomballoc               disabled multiple block allocator for block allocation.
+stripe=n                Number of filesystem blocks that mballoc will try
+                        to use for allocation size and alignment. For RAID5/6
+                        systems this should be the number of data
+                        disks *  RAID chunk size in file system blocks.
 
 Data Mode
 ---------
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index dec99455321f..4413a2d4646f 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -857,6 +857,45 @@ CPUs.
 The   "procs_blocked" line gives  the  number of  processes currently blocked,
 waiting for I/O to complete.
 
+1.9 Ext4 file system parameters
+------------------------------
+Ext4 file system have one directory per partition under /proc/fs/ext4/
+# ls /proc/fs/ext4/hdc/
+group_prealloc  max_to_scan  mb_groups  mb_history  min_to_scan  order2_req
+stats  stream_req
+
+mb_groups:
+This file gives the details of mutiblock allocator buddy cache of free blocks
+
+mb_history:
+Multiblock allocation history.
+
+stats:
+This file indicate whether the multiblock allocator should start collecting
+statistics. The statistics are shown during unmount
+
+group_prealloc:
+The multiblock allocator normalize the block allocation request to
+group_prealloc filesystem blocks if we don't have strip value set.
+The stripe value can be specified at mount time or during mke2fs.
+
+max_to_scan:
+How long multiblock allocator can look for a best extent (in found extents)
+
+min_to_scan:
+How long multiblock allocator  must look for a best extent
+
+order2_req:
+Multiblock allocator use  2^N search using buddies only for requests greater
+than or equal to order2_req. The request size is specfied in file system
+blocks. A value of 2 indicate only if the requests are greater than or equal
+to 4 blocks.
+
+stream_req:
+Files smaller than stream_req are served by the stream allocator, whose
+purpose is to pack requests as close each to other as possible to
+produce smooth I/O traffic. Avalue of 16 indicate that file smaller than 16
+filesystem block size will use group based preallocation.
 
 ------------------------------------------------------------------------------
 Summary
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt
index 616043a6da99..649cb8799890 100644
--- a/Documentation/kbuild/kconfig-language.txt
+++ b/Documentation/kbuild/kconfig-language.txt
@@ -24,7 +24,7 @@ visible if its parent entry is also visible.
 Menu entries
 ------------
 
-Most entries define a config option, all other entries help to organize
+Most entries define a config option; all other entries help to organize
 them. A single configuration option is defined like this:
 
 config MODVERSIONS
@@ -50,7 +50,7 @@ applicable everywhere (see syntax).
 
 - type definition: "bool"/"tristate"/"string"/"hex"/"int"
   Every config option must have a type. There are only two basic types:
-  tristate and string, the other types are based on these two. The type
+  tristate and string; the other types are based on these two. The type
   definition optionally accepts an input prompt, so these two examples
   are equivalent:
 
@@ -108,7 +108,7 @@ applicable everywhere (see syntax).
         equal to 'y' without visiting the dependencies. So abusing
         select you are able to select a symbol FOO even if FOO depends
         on BAR that is not set. In general use select only for
-        non-visible symbols (no promts anywhere) and for symbols with
+        non-visible symbols (no prompts anywhere) and for symbols with
         no dependencies. That will limit the usefulness but on the
         other hand avoid the illegal configurations all over. kconfig
         should one day warn about such things.
@@ -127,6 +127,27 @@ applicable everywhere (see syntax).
   used to help visually separate configuration logic from help within
   the file as an aid to developers.
 
+- misc options: "option" <symbol>[=<value>]
+  Various less common options can be defined via this option syntax,
+  which can modify the behaviour of the menu entry and its config
+  symbol. These options are currently possible:
+
+  - "defconfig_list"
+    This declares a list of default entries which can be used when
+    looking for the default configuration (which is used when the main
+    .config doesn't exists yet.)
+
+  - "modules"
+    This declares the symbol to be used as the MODULES symbol, which
+    enables the third modular state for all config symbols.
+
+  - "env"=<value>
+    This imports the environment variable into Kconfig. It behaves like
+    a default, except that the value comes from the environment, this
+    also means that the behaviour when mixing it with normal defaults is
+    undefined at this point. The symbol is currently not exported back
+    to the build environment (if this is desired, it can be done via
+    another symbol).
 
 Menu dependencies
 -----------------
@@ -162,9 +183,9 @@ An expression can have a value of 'n', 'm' or 'y' (or 0, 1, 2
 respectively for calculations). A menu entry becomes visible when it's
 expression evaluates to 'm' or 'y'.
 
-There are two types of symbols: constant and nonconstant symbols.
-Nonconstant symbols are the most common ones and are defined with the
-'config' statement. Nonconstant symbols consist entirely of alphanumeric
+There are two types of symbols: constant and non-constant symbols.
+Non-constant symbols are the most common ones and are defined with the
+'config' statement. Non-constant symbols consist entirely of alphanumeric
 characters or underscores.
 Constant symbols are only part of expressions. Constant symbols are
 always surrounded by single or double quotes. Within the quote, any
@@ -301,3 +322,81 @@ mainmenu:
 
 This sets the config program's title bar if the config program chooses
 to use it.
+
+
+Kconfig hints
+-------------
+This is a collection of Kconfig tips, most of which aren't obvious at
+first glance and most of which have become idioms in several Kconfig
+files.
+
+Adding common features and make the usage configurable
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+It is a common idiom to implement a feature/functionality that are
+relevant for some architectures but not all.
+The recommended way to do so is to use a config variable named HAVE_*
+that is defined in a common Kconfig file and selected by the relevant
+architectures.
+An example is the generic IOMAP functionality.
+
+We would in lib/Kconfig see:
+
+# Generic IOMAP is used to ...
+config HAVE_GENERIC_IOMAP
+
+config GENERIC_IOMAP
+        depends on HAVE_GENERIC_IOMAP && FOO
+
+And in lib/Makefile we would see:
+obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
+
+For each architecture using the generic IOMAP functionality we would see:
+
+config X86
+        select ...
+        select HAVE_GENERIC_IOMAP
+        select ...
+
+Note: we use the existing config option and avoid creating a new
+config variable to select HAVE_GENERIC_IOMAP.
+
+Note: the use of the internal config variable HAVE_GENERIC_IOMAP, it is
+introduced to overcome the limitation of select which will force a
+config option to 'y' no matter the dependencies.
+The dependencies are moved to the symbol GENERIC_IOMAP and we avoid the
+situation where select forces a symbol equals to 'y'.
+
+Build as module only
+~~~~~~~~~~~~~~~~~~~~
+To restrict a component build to module-only, qualify its config symbol
+with "depends on m".  E.g.:
+
+config FOO
+        depends on BAR && m
+
+limits FOO to module (=m) or disabled (=n).
+
+
+Build limited by a third config symbol which may be =y or =m
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+A common idiom that we see (and sometimes have problems with) is this:
+
+When option C in B (module or subsystem) uses interfaces from A (module
+or subsystem), and both A and B are tristate (could be =y or =m if they
+were independent of each other, but they aren't), then we need to limit
+C such that it cannot be built statically if A is built as a loadable
+module.  (C already depends on B, so there is no dependency issue to
+take care of here.)
+
+If A is linked statically into the kernel image, C can be built
+statically or as loadable module(s).  However, if A is built as loadable
+module(s), then C must be restricted to loadable module(s) also.  This
+can be expressed in kconfig language as:
+
+config C
+        depends on A = y || A = B
+
+or for real examples, use this command in a kernel tree:
+
+$ find . -name Kconfig\* | xargs grep -ns "depends on.*=.*||.*=" | grep -v orig
+
diff --git a/Documentation/mips/00-INDEX b/Documentation/mips/00-INDEX
index 3f13bf8043d2..8ae9cffc2262 100644
--- a/Documentation/mips/00-INDEX
+++ b/Documentation/mips/00-INDEX
@@ -2,5 +2,3 @@
         - this file.
 AU1xxx_IDE.README
         - README for MIPS AU1XXX IDE driver.
-GT64120.README
-        - README for dir with info on MIPS boards using GT-64120 or GT-64120A.
diff --git a/Documentation/mips/GT64120.README b/Documentation/mips/GT64120.README
deleted file mode 100644
index 2d0eec91dc59..000000000000
--- a/Documentation/mips/GT64120.README
+++ /dev/null
@@ -1,65 +0,0 @@
-README for arch/mips/gt64120 directory and subdirectories
-
-Jun Sun, jsun@mvista.com or jsun@junsun.net
-01/27, 2001
-
-MOTIVATION
-----------
-
-Many MIPS boards share the same system controller (or CPU companian chip),
-such as GT-64120.  It is highly desirable to let these boards share
-the same controller code instead of duplicating them.
-
-This directory is meant to hold all MIPS boards that use GT-64120 or GT-64120A.
-
-
-HOW TO ADD A BOARD
-------------------
- 
-. Create a subdirectory include/asm/gt64120/<board>.  
-
-. Create a file called gt64120_dep.h under that directory.
-
-. Modify include/asm/gt64120/gt64120.h file to include the new gt64120_dep.h
-  based on config options.  The board-dep section is at the end of 
-  include/asm/gt64120/gt64120.h file. There you can find all required
-  definitions include/asm/gt64120/<board>/gt64120_dep.h file must supply.
-
-. Create a subdirectory arch/mips/gt64120/<board> directory to hold
-  board specific routines.
-
-. The GT-64120 common code is supplied under arch/mips/gt64120/common directory.
-  It includes:
-        1) arch/mips/gt64120/pci.c -
-                common PCI routine, include the top-level pcibios_init()
-        2) arch/mips/gt64120/irq.c -
-                common IRQ routine, include the top-level do_IRQ() 
-           [This part really belongs to arch/mips/kernel. jsun]
-        3) arch/mips/gt64120/gt_irq.c -
-                common IRQ routines for GT-64120 chip.  Currently it only handles
-                the timer interrupt.
-
-. Board-specific routines are supplied under arch/mips/gt64120/<board> dir.
-        1) arch/mips/gt64120/<board>/pci.c - it provides bus fixup routine
-        2) arch/mips/gt64120/<board>/irq.c - it provides enable/disable irqs
-                and board irq setup routine (irq_setup)
-        3) arch/mips/gt64120/<board>/int-handler.S -
-                The first-level interrupt dispatching routine.
-        4) a bunch of other "normal" stuff (setup, prom, dbg_io, reset, etc)
-
-. Follow other "normal" procedure to modify configuration files, etc.
-
-
-TO-DO LIST
-----------
-
-. Expand arch/mips/gt64120/gt_irq.c to handle all GT-64120 interrupts.
-  We probably need to introduce GT_IRQ_BASE  in board-dep header file,
-  which is used the starting irq_nr for all GT irqs.
-
-  A function, gt64120_handle_irq(), will be added so that the first-level
-  irq dispatcher will call this function if it detects an interrupt
-  from GT-64120.
-
-. More support for GT-64120 PCI features (2nd PCI bus, perhaps)
-
diff --git a/Makefile b/Makefile
index 6d419f67939c..0f84c742ed0e 100644
--- a/Makefile
+++ b/Makefile
@@ -520,6 +520,11 @@ KBUILD_CFLAGS	+= -g
 KBUILD_AFLAGS   += -gdwarf-2
 endif
 
+# We trigger additional mismatches with less inlining
+ifdef CONFIG_DEBUG_SECTION_MISMATCH
+KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
+endif
+
 # Force gcc to behave correct even for buggy distributions
 KBUILD_CFLAGS         += $(call cc-option, -fno-stack-protector)
 
@@ -793,7 +798,7 @@ define rule_vmlinux-modpost
 endef
 
 # vmlinux image - including updated kernel symbols
-vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
+vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 ifdef CONFIG_HEADERS_CHECK
         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 endif
@@ -804,7 +809,9 @@ endif
         $(call if_changed_rule,vmlinux__)
         $(Q)rm -f .old_version
 
-vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
+# build vmlinux.o first to catch section mismatch errors early
+$(kallsyms.o): vmlinux.o
+vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE
         $(call if_changed_rule,vmlinux-modpost)
 
 # The actual objects are generated when descending, 
@@ -1021,9 +1028,14 @@ ifdef CONFIG_MODULES
 all: modules
 
 #       Build modules
+#
+#       A module can be listed more than once in obj-m resulting in
+#       duplicate lines in modules.order files.  Those are removed
+#       using awk while concatenating to the final file.
 
 PHONY += modules
 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
+        $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
         @echo '  Building modules, stage 2.';
         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 
@@ -1051,6 +1063,7 @@ _modinst_:
                 rm -f $(MODLIB)/build ; \
                 ln -s $(objtree) $(MODLIB)/build ; \
         fi
+        @cp -f $(objtree)/modules.order $(MODLIB)/
         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
 # This depmod is only for convenience to give the initial
@@ -1110,7 +1123,7 @@ clean: archclean $(clean-dirs)
         @find . $(RCS_FIND_IGNORE) \
                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-                -o -name '*.symtypes' \) \
+                -o -name '*.symtypes' -o -name 'modules.order' \) \
                 -type f -print | xargs rm -f
 
 # mrproper - Delete all generated files, including .config
@@ -1175,7 +1188,7 @@ help:
         @echo  '  dir/            - Build all files in dir and below'
         @echo  '  dir/file.[ois]  - Build specified target only'
         @echo  '  dir/file.ko     - Build module including final link'
-        @echo  '  rpm             - Build a kernel as an RPM package'
+        @echo  '  prepare         - Set up for building external modules'
         @echo  '  tags/TAGS       - Generate tags file for editors'
         @echo  '  cscope          - Generate cscope index'
         @echo  '  kernelrelease   - Output the release version string'
@@ -1188,6 +1201,8 @@ help:
         @echo  'Static analysers'
         @echo  '  checkstack      - Generate a list of stack hogs'
         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
+        @echo  '  versioncheck    - Sanity check on version.h usage'
+        @echo  '  includecheck    - Check for duplicate included header files'
         @echo  '  export_report   - List the usages of all exported symbols'
         @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
          echo  '  headers_check   - Sanity check on exported headers'; \
@@ -1371,6 +1386,7 @@ define xtags
         if $1 --version 2>&1 | grep -iq exuberant; then \
             $(all-sources) | xargs $1 -a \
                 -I __initdata,__exitdata,__acquires,__releases \
+                -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
                 --extra=+f --c-kinds=+px \
                 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
@@ -1428,12 +1444,12 @@ tags: FORCE
 includecheck:
         find * $(RCS_FIND_IGNORE) \
                 -name '*.[hcS]' -type f -print | sort \
-                | xargs $(PERL) -w scripts/checkincludes.pl
+                | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
 
 versioncheck:
         find * $(RCS_FIND_IGNORE) \
                 -name '*.[hcS]' -type f -print | sort \
-                | xargs $(PERL) -w scripts/checkversion.pl
+                | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
 
 namespacecheck:
         $(PERL) $(srctree)/scripts/namespace.pl
diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S
index 55c05b511f4c..f13249be17c5 100644
--- a/arch/alpha/kernel/vmlinux.lds.S
+++ b/arch/alpha/kernel/vmlinux.lds.S
@@ -46,11 +46,11 @@ SECTIONS
         __init_begin = .;
         .init.text : {
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
         .init.data : {
-                *(.init.data)
+                INIT_DATA
         }
 
         . = ALIGN(16);
@@ -136,8 +136,8 @@ SECTIONS
 
         /* Sections to be discarded */
         /DISCARD/ : {
-                *(.exit.text)
-                *(.exit.data)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/alpha/lib/dec_and_lock.c b/arch/alpha/lib/dec_and_lock.c
index 6ae2500a9d9e..0f5520d2f45f 100644
--- a/arch/alpha/lib/dec_and_lock.c
+++ b/arch/alpha/lib/dec_and_lock.c
@@ -30,8 +30,7 @@ _atomic_dec_and_lock:				\n\
         .previous                               \n\
         .end _atomic_dec_and_lock");
 
-static int __attribute_used__
-atomic_dec_and_lock_1(atomic_t *atomic, spinlock_t *lock)
+static int __used atomic_dec_and_lock_1(atomic_t *atomic, spinlock_t *lock)
 {
         /* Slow path */
         spin_lock(lock);
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 30f732c7fdb5..4898bdcfe7dd 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -30,7 +30,7 @@ SECTIONS
         }
 
         .init : {                       /* Init code and data           */
-                        *(.init.text)
+                        INIT_TEXT
                 _einittext = .;
                 __proc_info_begin = .;
                         *(.proc.info.init)
@@ -70,15 +70,15 @@ SECTIONS
                 __per_cpu_end = .;
 #ifndef CONFIG_XIP_KERNEL
                 __init_begin = _stext;
-                *(.init.data)
+                INIT_DATA
                 . = ALIGN(4096);
                 __init_end = .;
 #endif
         }
 
         /DISCARD/ : {                   /* Exit code and data           */
-                *(.exit.text)
-                *(.exit.data)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
 #ifndef CONFIG_MMU
                 *(.fixup)
@@ -130,7 +130,7 @@ SECTIONS
 #ifdef CONFIG_XIP_KERNEL
                 . = ALIGN(4096);
                 __init_begin = .;
-                *(.init.data)
+                INIT_DATA
                 . = ALIGN(4096);
                 __init_end = .;
 #endif
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 02272aa36e90..88d5e61a2e13 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -1,9 +1,6 @@
 #
 # Makefile for the linux kernel.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
 
 # Object file lists.
 
diff --git a/arch/arm/mach-netx/Makefile b/arch/arm/mach-netx/Makefile
index 18785ff37657..7ce4ba9eb242 100644
--- a/arch/arm/mach-netx/Makefile
+++ b/arch/arm/mach-netx/Makefile
@@ -1,9 +1,6 @@
 #
 # Makefile for the linux kernel.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
 
 # Object file lists.
 
diff --git a/arch/avr32/kernel/vmlinux.lds.S b/arch/avr32/kernel/vmlinux.lds.S
index 11f08e35a2eb..481cfd40c053 100644
--- a/arch/avr32/kernel/vmlinux.lds.S
+++ b/arch/avr32/kernel/vmlinux.lds.S
@@ -27,19 +27,19 @@ SECTIONS
                 __init_begin = .;
                         _sinittext = .;
                         *(.text.reset)
-                        *(.init.text)
+                        INIT_TEXT
                         /*
                          * .exit.text is discarded at runtime, not
                          * link time, to deal with references from
                          * __bug_table
                          */
-                        *(.exit.text)
+                        EXIT_TEXT
                         _einittext = .;
                 . = ALIGN(4);
                 __tagtable_begin = .;
                         *(.taglist.init)
                 __tagtable_end = .;
-                        *(.init.data)
+                        INIT_DATA
                 . = ALIGN(16);
                 __setup_start = .;
                         *(.init.setup)
@@ -135,7 +135,7 @@ SECTIONS
          * thrown away, as cleanup code is never called unless it's a module.
          */
         /DISCARD/               : {
-                *(.exit.data)
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
index 9b75bc83c71f..858722421b40 100644
--- a/arch/blackfin/kernel/vmlinux.lds.S
+++ b/arch/blackfin/kernel/vmlinux.lds.S
@@ -91,13 +91,13 @@ SECTIONS
         {
                 . = ALIGN(PAGE_SIZE);
                 __sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 __einittext = .;
         }
         .init.data :
         {
                 . = ALIGN(16);
-                *(.init.data)
+                INIT_DATA
         }
         .init.setup :
         {
@@ -198,8 +198,8 @@ SECTIONS
 
         /DISCARD/ :
         {
-                *(.exit.text)
-                *(.exit.data)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 }
diff --git a/arch/cris/arch-v10/vmlinux.lds.S b/arch/cris/arch-v10/vmlinux.lds.S
index 97a7876ed681..93c9f0ea286b 100644
--- a/arch/cris/arch-v10/vmlinux.lds.S
+++ b/arch/cris/arch-v10/vmlinux.lds.S
@@ -57,10 +57,10 @@ SECTIONS
         __init_begin = .;
         .init.text : { 
                    _sinittext = .;
-                   *(.init.text)
+                   INIT_TEXT
                    _einittext = .;
         }
-        .init.data : { *(.init.data) }
+        .init.data : { INIT_DATA }
         . = ALIGN(16);
         __setup_start = .;
         .init.setup : { *(.init.setup) }
@@ -109,8 +109,8 @@ SECTIONS
 
         /* Sections to be discarded */
         /DISCARD/ : {
-                *(.text.exit)
-                *(.data.exit)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/cris/arch-v32/boot/compressed/Makefile b/arch/cris/arch-v32/boot/compressed/Makefile
index 9f77eda914ba..609692f9d5eb 100644
--- a/arch/cris/arch-v32/boot/compressed/Makefile
+++ b/arch/cris/arch-v32/boot/compressed/Makefile
@@ -7,7 +7,7 @@
 target = $(target_compressed_dir)
 src    = $(src_compressed_dir)
 
-CC = gcc-cris -mlinux -march=v32 -I $(TOPDIR)/include
+CC = gcc-cris -mlinux -march=v32 $(LINUXINCLUDE)
 CFLAGS = -O2
 LD = gcc-cris -mlinux -march=v32 -nostdlib
 OBJCOPY = objcopy-cris
diff --git a/arch/cris/arch-v32/vmlinux.lds.S b/arch/cris/arch-v32/vmlinux.lds.S
index b076c134c0bb..fead8c59ea63 100644
--- a/arch/cris/arch-v32/vmlinux.lds.S
+++ b/arch/cris/arch-v32/vmlinux.lds.S
@@ -61,10 +61,10 @@ SECTIONS
         __init_begin = .;
         .init.text : {
                    _sinittext = .;
-                   *(.init.text)
+                   INIT_TEXT
                    _einittext = .;
         }
-        .init.data : { *(.init.data) }
+        .init.data : { INIT_DATA }
         . = ALIGN(16);
         __setup_start = .;
         .init.setup : { *(.init.setup) }
@@ -124,8 +124,8 @@ SECTIONS
 
         /* Sections to be discarded */
         /DISCARD/ : {
-                *(.text.exit)
-                *(.data.exit)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/frv/boot/Makefile b/arch/frv/boot/Makefile
index dc6f03824423..6ae3254da019 100644
--- a/arch/frv/boot/Makefile
+++ b/arch/frv/boot/Makefile
@@ -10,7 +10,7 @@
 
 targets := Image zImage bootpImage
 
-SYSTEM  =$(TOPDIR)/$(LINUX)
+SYSTEM  =$(LINUX)
 
 ZTEXTADDR        = 0x02080000
 PARAMS_PHYS      = 0x0207c000
@@ -45,7 +45,7 @@ zImage:	$(CONFIGURE) compressed/$(LINUX)
 bootpImage: bootp/bootp
         $(OBJCOPY) -O binary -R .note -R .comment -S bootp/bootp $@
 
-compressed/$(LINUX): $(TOPDIR)/$(LINUX) dep
+compressed/$(LINUX): $(LINUX) dep
         @$(MAKE) -C compressed $(LINUX)
 
 bootp/bootp: zImage initrd
@@ -59,10 +59,10 @@ initrd:
 # installation
 #
 install: $(CONFIGURE) Image
-        sh ./install.sh $(KERNELRELEASE) Image $(TOPDIR)/System.map "$(INSTALL_PATH)"
+        sh ./install.sh $(KERNELRELEASE) Image System.map "$(INSTALL_PATH)"
 
 zinstall: $(CONFIGURE) zImage
-        sh ./install.sh $(KERNELRELEASE) zImage $(TOPDIR)/System.map "$(INSTALL_PATH)"
+        sh ./install.sh $(KERNELRELEASE) zImage System.map "$(INSTALL_PATH)"
 
 #
 # miscellany
diff --git a/arch/frv/kernel/gdb-stub.c b/arch/frv/kernel/gdb-stub.c
index e89cad1192a9..48a0393e7cee 100644
--- a/arch/frv/kernel/gdb-stub.c
+++ b/arch/frv/kernel/gdb-stub.c
@@ -87,7 +87,7 @@
  *  Example:
  *    $ cd ~/linux
  *    $ make menuconfig <go to "Kernel Hacking" and turn on remote debugging>
- *    $ make dep; make vmlinux
+ *    $ make vmlinux
  *
  *  Step 3:
  *  Download the kernel to the remote target and start
diff --git a/arch/frv/kernel/vmlinux.lds.S b/arch/frv/kernel/vmlinux.lds.S
index a17a81d58bf6..f42b328b1dd0 100644
--- a/arch/frv/kernel/vmlinux.lds.S
+++ b/arch/frv/kernel/vmlinux.lds.S
@@ -28,14 +28,14 @@ SECTIONS
   .init.text : {
         *(.text.head)
 #ifndef CONFIG_DEBUG_INFO
-        *(.init.text)
-        *(.exit.text)
-        *(.exit.data)
+        INIT_TEXT
+        EXIT_TEXT
+        EXIT_DATA
         *(.exitcall.exit)
 #endif
   }
   _einittext = .;
-  .init.data : { *(.init.data) }
+  .init.data : { INIT_DATA }
 
   . = ALIGN(8);
   __setup_start = .;
@@ -106,8 +106,8 @@ SECTIONS
         LOCK_TEXT
 #ifdef CONFIG_DEBUG_INFO
         *(
-        .init.text
-        .exit.text
+        INIT_TEXT
+        EXIT_TEXT
         .exitcall.exit
         )
 #endif
@@ -138,7 +138,7 @@ SECTIONS
   .data : {                     /* Data */
         DATA_DATA
         *(.data.*)
-        *(.exit.data)
+        EXIT_DATA
         CONSTRUCTORS
         }
 
diff --git a/arch/h8300/kernel/vmlinux.lds.S b/arch/h8300/kernel/vmlinux.lds.S
index a2e72d495551..43a87b9085b6 100644
--- a/arch/h8300/kernel/vmlinux.lds.S
+++ b/arch/h8300/kernel/vmlinux.lds.S
@@ -110,9 +110,9 @@ SECTIONS
         . = ALIGN(0x4) ;
         ___init_begin = .;
         __sinittext = .; 
-                *(.init.text)
+                INIT_TEXT
         __einittext = .; 
-                *(.init.data)
+                INIT_DATA
         . = ALIGN(0x4) ;
         ___setup_start = .;
                 *(.init.setup)
@@ -124,8 +124,8 @@ SECTIONS
         ___con_initcall_start = .;
                 *(.con_initcall.init)
         ___con_initcall_end = .;
-                *(.exit.text)
-                *(.exit.data)
+                EXIT_TEXT
+                EXIT_DATA
 #if defined(CONFIG_BLK_DEV_INITRD)
                 . = ALIGN(4);
         ___initramfs_start = .;
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 757e419ebcf8..80622acc95de 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -27,8 +27,8 @@ SECTIONS
 {
   /* Sections to be discarded */
   /DISCARD/ : {
-        *(.exit.text)
-        *(.exit.data)
+        EXIT_TEXT
+        EXIT_DATA
         *(.exitcall.exit)
         *(.IA_64.unwind.exit.text)
         *(.IA_64.unwind_info.exit.text)
@@ -119,12 +119,12 @@ SECTIONS
   .init.text : AT(ADDR(.init.text) - LOAD_OFFSET)
         {
           _sinittext = .;
-          *(.init.text)
+          INIT_TEXT
           _einittext = .;
         }
 
   .init.data : AT(ADDR(.init.data) - LOAD_OFFSET)
-        { *(.init.data) }
+        { INIT_DATA }
 
 #ifdef CONFIG_BLK_DEV_INITRD
   .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET)
diff --git a/arch/m32r/kernel/vmlinux.lds.S b/arch/m32r/kernel/vmlinux.lds.S
index 942a8c7a4417..41b07854fcc6 100644
--- a/arch/m32r/kernel/vmlinux.lds.S
+++ b/arch/m32r/kernel/vmlinux.lds.S
@@ -76,10 +76,10 @@ SECTIONS
   __init_begin = .;
   .init.text : {
         _sinittext = .;
-        *(.init.text)
+        INIT_TEXT
         _einittext = .;
   }
-  .init.data : { *(.init.data) }
+  .init.data : { INIT_DATA }
   . = ALIGN(16);
   __setup_start = .;
   .init.setup : { *(.init.setup) }
@@ -100,8 +100,8 @@ SECTIONS
   .altinstr_replacement : { *(.altinstr_replacement) }
   /* .exit.text is discard at runtime, not link time, to deal with references
      from .altinstructions and .eh_frame */
-  .exit.text : { *(.exit.text) }
-  .exit.data : { *(.exit.data) }
+  .exit.text : { EXIT_TEXT }
+  .exit.data : { EXIT_DATA }
 
 #ifdef CONFIG_BLK_DEV_INITRD
   . = ALIGN(4096);
@@ -124,8 +124,8 @@ SECTIONS
 
   /* Sections to be discarded */
   /DISCARD/ : {
-        *(.exit.text)
-        *(.exit.data)
+        EXIT_TEXT
+        EXIT_DATA
         *(.exitcall.exit)
         }
 
diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index 59fe285865ec..7537cc5e6159 100644
--- a/arch/m68k/kernel/vmlinux-std.lds
+++ b/arch/m68k/kernel/vmlinux-std.lds
@@ -45,10 +45,10 @@ SECTIONS
   __init_begin = .;
   .init.text : {
         _sinittext = .;
-        *(.init.text)
+        INIT_TEXT
         _einittext = .;
   }
-  .init.data : { *(.init.data) }
+  .init.data : { INIT_DATA }
   . = ALIGN(16);
   __setup_start = .;
   .init.setup : { *(.init.setup) }
@@ -82,8 +82,8 @@ SECTIONS
 
   /* Sections to be discarded */
   /DISCARD/ : {
-        *(.exit.text)
-        *(.exit.data)
+        EXIT_TEXT
+        EXIT_DATA
         *(.exitcall.exit)
         }
 
diff --git a/arch/m68k/kernel/vmlinux-sun3.lds b/arch/m68k/kernel/vmlinux-sun3.lds
index 4adffefb5c48..cdc313e7c299 100644
--- a/arch/m68k/kernel/vmlinux-sun3.lds
+++ b/arch/m68k/kernel/vmlinux-sun3.lds
@@ -38,10 +38,10 @@ SECTIONS
 __init_begin = .;
         .init.text : {
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
-        .init.data : { *(.init.data) }
+        .init.data : { INIT_DATA }
         . = ALIGN(16);
         __setup_start = .;
         .init.setup : { *(.init.setup) }
@@ -77,8 +77,8 @@ __init_begin = .;
 
   /* Sections to be discarded */
   /DISCARD/ : {
-        *(.exit.text)
-        *(.exit.data)
+        EXIT_TEXT
+        EXIT_DATA
         *(.exitcall.exit)
         }
 
diff --git a/arch/m68knommu/kernel/vmlinux.lds.S b/arch/m68knommu/kernel/vmlinux.lds.S
index 07a0055602f4..b44edb08e212 100644
--- a/arch/m68knommu/kernel/vmlinux.lds.S
+++ b/arch/m68knommu/kernel/vmlinux.lds.S
@@ -143,9 +143,9 @@ SECTIONS {
                 . = ALIGN(4096);
                 __init_begin = .;
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
-                *(.init.data)
+                INIT_DATA
                 . = ALIGN(16);
                 __setup_start = .;
                 *(.init.setup)
@@ -170,8 +170,8 @@ SECTIONS {
         } > INIT
 
         /DISCARD/ : {
-                *(.exit.text)
-                *(.exit.data)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b22c043b6ef8..6b0f85f02c79 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -37,16 +37,6 @@ config BASLER_EXCITE
           The eXcite is a smart camera platform manufactured by
           Basler Vision Technologies AG.
 
-config BASLER_EXCITE_PROTOTYPE
-        bool "Support for pre-release units"
-        depends on BASLER_EXCITE
-        default n
-        help
-          Pre-series (prototype) units are different from later ones in
-          some ways. Select this option if you have one of these. Please
-          note that a kernel built with this option selected will not be
-          able to run on normal units.
-
 config BCM47XX
         bool "BCM47XX based boards"
         select CEVT_R4K
@@ -82,7 +72,7 @@ config MIPS_COBALT
         select SYS_HAS_CPU_NEVADA
         select SYS_HAS_EARLY_PRINTK
         select SYS_SUPPORTS_32BIT_KERNEL
-        select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
+        select SYS_SUPPORTS_64BIT_KERNEL
         select SYS_SUPPORTS_LITTLE_ENDIAN
         select GENERIC_HARDIRQS_NO__DO_IRQ
 
@@ -91,6 +81,9 @@ config MACH_DECSTATION
         select BOOT_ELF32
         select CEVT_R4K
         select CSRC_R4K
+        select CPU_DADDI_WORKAROUNDS if 64BIT
+        select CPU_R4000_WORKAROUNDS if 64BIT
+        select CPU_R4400_WORKAROUNDS if 64BIT
         select DMA_NONCOHERENT
         select NO_IOPORT
         select IRQ_CPU
@@ -124,12 +117,12 @@ config MACH_JAZZ
         select ARCH_MAY_HAVE_PC_FDC
         select CEVT_R4K
         select CSRC_R4K
+        select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
         select GENERIC_ISA_DMA
         select IRQ_CPU
         select I8253
         select I8259
         select ISA
-        select PCSPEAKER
         select SYS_HAS_CPU_R4X00
         select SYS_SUPPORTS_32BIT_KERNEL
         select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
@@ -187,6 +180,7 @@ config LEMOTE_FULONG
 config MIPS_ATLAS
         bool "MIPS Atlas board"
         select BOOT_ELF32
+        select BOOT_RAW
         select CEVT_R4K
         select CSRC_R4K
         select DMA_NONCOHERENT
@@ -219,6 +213,7 @@ config MIPS_MALTA
         bool "MIPS Malta board"
         select ARCH_MAY_HAVE_PC_FDC
         select BOOT_ELF32
+        select BOOT_RAW
         select CEVT_R4K
         select CSRC_R4K
         select DMA_NONCOHERENT
@@ -364,35 +359,6 @@ config PMC_YOSEMITE
           Yosemite is an evaluation board for the RM9000x2 processor
           manufactured by PMC-Sierra.
 
-config QEMU
-        bool "Qemu"
-        select CEVT_R4K
-        select CSRC_R4K
-        select DMA_COHERENT
-        select GENERIC_ISA_DMA
-        select HAVE_STD_PC_SERIAL_PORT
-        select I8253
-        select I8259
-        select IRQ_CPU
-        select ISA
-        select PCSPEAKER
-        select SWAP_IO_SPACE
-        select SYS_HAS_CPU_MIPS32_R1
-        select SYS_HAS_EARLY_PRINTK
-        select SYS_SUPPORTS_32BIT_KERNEL
-        select SYS_SUPPORTS_BIG_ENDIAN
-        select SYS_SUPPORTS_LITTLE_ENDIAN
-        select GENERIC_HARDIRQS_NO__DO_IRQ
-        select NR_CPUS_DEFAULT_1
-        select SYS_SUPPORTS_SMP
-        help
-          Qemu is a software emulator which among other architectures also
-          can simulate a MIPS32 4Kc system.  This patch adds support for the
-          system architecture that currently is being simulated by Qemu.  It
-          will eventually be removed again when Qemu has the capability to
-          simulate actual MIPS hardware platforms.  More information on Qemu
-          can be found at http://www.linux-mips.org/wiki/Qemu.
-
 config SGI_IP22
         bool "SGI IP22 (Indy/Indigo2)"
         select ARC
@@ -400,6 +366,7 @@ config SGI_IP22
         select BOOT_ELF32
         select CEVT_R4K
         select CSRC_R4K
+        select DEFAULT_SGI_PARTITION
         select DMA_NONCOHERENT
         select HW_HAS_EISA
         select I8253
@@ -407,6 +374,12 @@ config SGI_IP22
         select IP22_CPU_SCACHE
         select IRQ_CPU
         select GENERIC_ISA_DMA_SUPPORT_BROKEN
+        select SGI_HAS_DS1286
+        select SGI_HAS_I8042
+        select SGI_HAS_INDYDOG
+        select SGI_HAS_SEEQ
+        select SGI_HAS_WD93
+        select SGI_HAS_ZILOG
         select SWAP_IO_SPACE
         select SYS_HAS_CPU_R4X00
         select SYS_HAS_CPU_R5000
@@ -424,6 +397,7 @@ config SGI_IP27
         select ARC
         select ARC64
         select BOOT_ELF64
+        select DEFAULT_SGI_PARTITION
         select DMA_IP27
         select SYS_HAS_EARLY_PRINTK
         select HW_HAS_PCI
@@ -440,6 +414,36 @@ config SGI_IP27
           workstations.  To compile a Linux kernel that runs on these, say Y
           here.
 
+config SGI_IP28
+        bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
+        depends on EXPERIMENTAL
+        select ARC
+        select ARC64
+        select BOOT_ELF64
+        select CEVT_R4K
+        select CSRC_R4K
+        select DEFAULT_SGI_PARTITION
+        select DMA_NONCOHERENT
+        select GENERIC_ISA_DMA_SUPPORT_BROKEN
+        select IRQ_CPU
+        select HW_HAS_EISA
+        select I8253
+        select I8259
+        select SGI_HAS_DS1286
+        select SGI_HAS_I8042
+        select SGI_HAS_INDYDOG
+        select SGI_HAS_SEEQ
+        select SGI_HAS_WD93
+        select SGI_HAS_ZILOG
+        select SWAP_IO_SPACE
+        select SYS_HAS_CPU_R10000
+        select SYS_HAS_EARLY_PRINTK
+        select SYS_SUPPORTS_64BIT_KERNEL
+        select SYS_SUPPORTS_BIG_ENDIAN
+      help
+        This is the SGI Indigo2 with R10000 processor.  To compile a Linux
+        kernel that runs on these, say Y here.
+
 config SGI_IP32
         bool "SGI IP32 (O2)"
         select ARC
@@ -545,19 +549,6 @@ config SIBYTE_SENTOSA
         select SYS_SUPPORTS_BIG_ENDIAN
         select SYS_SUPPORTS_LITTLE_ENDIAN
 
-config SIBYTE_PTSWARM
-        bool "Sibyte BCM91250PT-PTSWARM"
-        depends on EXPERIMENTAL
-        select BOOT_ELF32
-        select DMA_COHERENT
-        select NR_CPUS_DEFAULT_2
-        select SIBYTE_SB1250
-        select SWAP_IO_SPACE
-        select SYS_HAS_CPU_SB1
-        select SYS_SUPPORTS_BIG_ENDIAN
-        select SYS_SUPPORTS_HIGHMEM
-        select SYS_SUPPORTS_LITTLE_ENDIAN
-
 config SIBYTE_BIGSUR
         bool "Sibyte BCM91480B-BigSur"
         select BOOT_ELF32
@@ -575,10 +566,12 @@ config SNI_RM
         bool "SNI RM200/300/400"
         select ARC if CPU_LITTLE_ENDIAN
         select ARC32 if CPU_LITTLE_ENDIAN
+        select SNIPROM if CPU_BIG_ENDIAN
         select ARCH_MAY_HAVE_PC_FDC
         select BOOT_ELF32
         select CEVT_R4K
         select CSRC_R4K
+        select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
         select DMA_NONCOHERENT
         select GENERIC_ISA_DMA
         select HW_HAS_EISA
@@ -587,7 +580,6 @@ config SNI_RM
         select I8253
         select I8259
         select ISA
-        select PCSPEAKER
         select SWAP_IO_SPACE if CPU_BIG_ENDIAN
         select SYS_HAS_CPU_R4X00
         select SYS_HAS_CPU_R5000
@@ -690,6 +682,7 @@ config WR_PPMC
 endchoice
 
 source "arch/mips/au1000/Kconfig"
+source "arch/mips/basler/excite/Kconfig"
 source "arch/mips/jazz/Kconfig"
 source "arch/mips/lasat/Kconfig"
 source "arch/mips/pmc-sierra/Kconfig"
@@ -797,10 +790,6 @@ config DMA_COHERENT
 config DMA_IP27
         bool
 
-config DMA_IP32
-        bool
-        select DMA_NEED_PCI_MAP_STATE
-
 config DMA_NONCOHERENT
         bool
         select DMA_NEED_PCI_MAP_STATE
@@ -956,16 +945,40 @@ config EMMA2RH
 config SERIAL_RM9000
         bool
 
+config SGI_HAS_DS1286
+        bool
+
+config SGI_HAS_INDYDOG
+        bool
+
+config SGI_HAS_SEEQ
+        bool
+
+config SGI_HAS_WD93
+        bool
+
+config SGI_HAS_ZILOG
+        bool
+
+config SGI_HAS_I8042
+        bool
+
+config DEFAULT_SGI_PARTITION
+        bool
+
 config ARC32
         bool
 
+config SNIPROM
+        bool
+
 config BOOT_ELF32
         bool
 
 config MIPS_L1_CACHE_SHIFT
         int
         default "4" if MACH_DECSTATION
-        default "7" if SGI_IP27 || SNI_RM
+        default "7" if SGI_IP27 || SGI_IP28 || SNI_RM
         default "4" if PMC_MSP4200_EVAL
         default "5"
 
@@ -974,7 +987,7 @@ config HAVE_STD_PC_SERIAL_PORT
 
 config ARC_CONSOLE
         bool "ARC console support"
-        depends on SGI_IP22 || (SNI_RM && CPU_LITTLE_ENDIAN)
+        depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
 
 config ARC_MEMORY
         bool
@@ -983,7 +996,7 @@ config ARC_MEMORY
 
 config ARC_PROMLIB
         bool
-        depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP32
+        depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
         default y
 
 config ARC64
@@ -1443,7 +1456,9 @@ config MIPS_MT_SMP
         select MIPS_MT
         select NR_CPUS_DEFAULT_2
         select SMP
+        select SYS_SUPPORTS_SCHED_SMT if SMP
         select SYS_SUPPORTS_SMP
+        select SMP_UP
         help
           This is a kernel model which is also known a VSMP or lately
           has been marketesed into SMVP.
@@ -1460,6 +1475,7 @@ config MIPS_MT_SMTC
         select NR_CPUS_DEFAULT_8
         select SMP
         select SYS_SUPPORTS_SMP
+        select SMP_UP
         help
           This is a kernel model which is known a SMTC or lately has been
           marketesed into SMVP.
@@ -1469,6 +1485,19 @@ endchoice
 config MIPS_MT
         bool
 
+config SCHED_SMT
+        bool "SMT (multithreading) scheduler support"
+        depends on SYS_SUPPORTS_SCHED_SMT
+        default n
+        help
+          SMT scheduler support improves the CPU scheduler's decision making
+          when dealing with MIPS MT enabled cores at a cost of slightly
+          increased overhead in some places. If unsure say N here.
+
+config SYS_SUPPORTS_SCHED_SMT
+        bool
+
+
 config SYS_SUPPORTS_MULTITHREADING
         bool
 
@@ -1589,15 +1618,6 @@ config CPU_HAS_SMARTMIPS
 config CPU_HAS_WB
         bool
 
-config 64BIT_CONTEXT
-        bool "Save 64bit integer registers"
-        depends on 32BIT && CPU_LOONGSON2
-        help
-          Loongson2 CPU is 64bit , when used in 32BIT mode, its integer
-          registers can still be accessed as 64bit, mainly for multimedia
-          instructions. We must have all 64bit save/restored to make sure
-          those instructions to get correct result.
-
 #
 # Vectored interrupt mode is an R2 feature
 #
@@ -1619,6 +1639,19 @@ config GENERIC_CLOCKEVENTS_BROADCAST
         bool
 
 #
+# CPU non-features
+#
+config CPU_DADDI_WORKAROUNDS
+        bool
+
+config CPU_R4000_WORKAROUNDS
+        bool
+        select CPU_R4400_WORKAROUNDS
+
+config CPU_R4400_WORKAROUNDS
+        bool
+
+#
 # Use the generic interrupt handling code in kernel/irq/:
 #
 config GENERIC_HARDIRQS
@@ -1721,6 +1754,9 @@ config SMP
 
           If you don't know what to do here, say N.
 
+config SMP_UP
+        bool
+
 config SYS_SUPPORTS_SMP
         bool
 
@@ -1978,9 +2014,6 @@ config MMU
 config I8253
         bool
 
-config PCSPEAKER
-        bool
-
 config ZONE_DMA32
         bool
 
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index a1f8d8b96b03..3fb7f3065c92 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -141,6 +141,10 @@ cflags-$(CONFIG_CPU_R8000)	+= -march=r8000 -Wa,--trap
 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
                         -Wa,--trap
 
+cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
+cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
+cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
+
 ifdef CONFIG_CPU_SB1
 ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
 MODFLAGS        += -msb1-pass1-workarounds
@@ -152,6 +156,8 @@ endif
 #
 libs-$(CONFIG_ARC)              += arch/mips/fw/arc/
 libs-$(CONFIG_CFE)              += arch/mips/fw/cfe/
+libs-$(CONFIG_SNIPROM)          += arch/mips/fw/sni/
+libs-y                          += arch/mips/fw/lib/
 libs-$(CONFIG_SIBYTE_CFE)       += arch/mips/sibyte/cfe/
 
 #
@@ -308,7 +314,7 @@ core-$(CONFIG_MIPS_ATLAS)	+= arch/mips/mips-boards/atlas/
 cflags-$(CONFIG_MIPS_ATLAS)     += -Iinclude/asm-mips/mach-atlas
 cflags-$(CONFIG_MIPS_ATLAS)     += -Iinclude/asm-mips/mach-mips
 load-$(CONFIG_MIPS_ATLAS)       += 0xffffffff80100000
-all-$(CONFIG_MIPS_ATLAS)        := vmlinux.srec
+all-$(CONFIG_MIPS_ATLAS)        := vmlinux.bin
 
 #
 # MIPS Malta board
@@ -316,7 +322,7 @@ all-$(CONFIG_MIPS_ATLAS)	:= vmlinux.srec
 core-$(CONFIG_MIPS_MALTA)       += arch/mips/mips-boards/malta/
 cflags-$(CONFIG_MIPS_MALTA)     += -Iinclude/asm-mips/mach-mips
 load-$(CONFIG_MIPS_MALTA)       += 0xffffffff80100000
-all-$(CONFIG_MIPS_MALTA)        := vmlinux.srec
+all-$(CONFIG_MIPS_MALTA)        := vmlinux.bin
 
 #
 # MIPS SEAD board
@@ -349,14 +355,6 @@ cflags-$(CONFIG_PMC_YOSEMITE)	+= -Iinclude/asm-mips/mach-yosemite
 load-$(CONFIG_PMC_YOSEMITE)     += 0xffffffff80100000
 
 #
-# Qemu simulating MIPS32 4Kc
-#
-core-$(CONFIG_QEMU)             += arch/mips/qemu/
-cflags-$(CONFIG_QEMU)           += -Iinclude/asm-mips/mach-qemu
-load-$(CONFIG_QEMU)             += 0xffffffff80010000
-all-$(CONFIG_QEMU)              := vmlinux.bin
-
-#
 # Basler eXcite
 #
 core-$(CONFIG_BASLER_EXCITE)    += arch/mips/basler/excite/
@@ -475,6 +473,20 @@ endif
 endif
 
 #
+# SGI IP28 (Indigo2 R10k)
+#
+# Set the load address to >= 0xa800000020080000 if you want to leave space for
+# symmon, 0xa800000020004000 for production kernels ?  Note that the value must
+# be 16kb aligned or the handling of the current variable will break.
+# Simplified: what IP22 does at 128MB+ in ksegN, IP28 does at 512MB+ in xkphys
+#
+#core-$(CONFIG_SGI_IP28)                += arch/mips/sgi-ip22/ arch/mips/arc/arc_con.o
+core-$(CONFIG_SGI_IP28)         += arch/mips/sgi-ip22/
+cflags-$(CONFIG_SGI_IP28)       += -mr10k-cache-barrier=1 -Iinclude/asm-mips/mach-ip28
+#cflags-$(CONFIG_SGI_IP28)      += -Iinclude/asm-mips/mach-ip28
+load-$(CONFIG_SGI_IP28)         += 0xa800000020004000
+
+#
 # SGI-IP32 (O2)
 #
 # Set the load address to >= 80069000 if you want to leave space for symmon,
@@ -602,9 +614,11 @@ ifdef CONFIG_64BIT
     endif
   endif
 
-  ifeq ($(KBUILD_SYM32), y)
-    ifeq ($(call cc-option-yn,-msym32), y)
-      cflags-y += -msym32 -DKBUILD_64BIT_SYM32
+  ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
+    cflags-y += -msym32 -DKBUILD_64BIT_SYM32
+  else
+    ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
+      $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
     endif
   endif
 endif
diff --git a/arch/mips/au1000/common/au1xxx_irqmap.c b/arch/mips/au1000/common/au1xxx_irqmap.c
index 98a4e34b0248..37a10a01de9d 100644
--- a/arch/mips/au1000/common/au1xxx_irqmap.c
+++ b/arch/mips/au1000/common/au1xxx_irqmap.c
@@ -25,27 +25,10 @@
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
-#include <linux/errno.h>
 #include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
+#include <linux/kernel.h>
 
-#include <asm/bootinfo.h>
-#include <asm/io.h>
-#include <asm/mipsregs.h>
-#include <asm/system.h>
-#include <asm/mach-au1x00/au1000.h>
+#include <au1000.h>
 
 /* The IC0 interrupt table.  This is processor, rather than
  * board dependent, so no reason to keep this info in the board
diff --git a/arch/mips/au1000/common/dbdma.c b/arch/mips/au1000/common/dbdma.c
index edf91f41a786..428ed275a0f6 100644
--- a/arch/mips/au1000/common/dbdma.c
+++ b/arch/mips/au1000/common/dbdma.c
@@ -179,7 +179,7 @@ static dbdev_tab_t dbdev_tab[] = {
         { 0, 0, 0, 0, 0, 0, 0 },
 };
 
-#define DBDEV_TAB_SIZE (sizeof(dbdev_tab) / sizeof(dbdev_tab_t))
+#define DBDEV_TAB_SIZE  ARRAY_SIZE(dbdev_tab)
 
 static chan_tab_t *chan_tab_ptr[NUM_DBDMA_CHANS];
 
diff --git a/arch/mips/au1000/db1x00/init.c b/arch/mips/au1000/db1x00/init.c
index 43298fd9459c..e822c123eab8 100644
--- a/arch/mips/au1000/db1x00/init.c
+++ b/arch/mips/au1000/db1x00/init.c
@@ -57,17 +57,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg2;
 
-        /* Set the platform # */
-#if     defined(CONFIG_MIPS_DB1550)
-        mips_machtype = MACH_DB1550;
-#elif   defined(CONFIG_MIPS_DB1500)
-        mips_machtype = MACH_DB1500;
-#elif   defined(CONFIG_MIPS_DB1100)
-        mips_machtype = MACH_DB1100;
-#else
-        mips_machtype = MACH_DB1000;
-#endif
-
         prom_init_cmdline();
 
         memsize_str = prom_getenv("memsize");
diff --git a/arch/mips/au1000/mtx-1/init.c b/arch/mips/au1000/mtx-1/init.c
index cdeae3212a2d..e700fd312a24 100644
--- a/arch/mips/au1000/mtx-1/init.c
+++ b/arch/mips/au1000/mtx-1/init.c
@@ -54,8 +54,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg2;
 
-        mips_machtype = MACH_MTX1;      /* set the platform # */
-
         prom_init_cmdline();
 
         memsize_str = prom_getenv("memsize");
diff --git a/arch/mips/au1000/mtx-1/platform.c b/arch/mips/au1000/mtx-1/platform.c
index 49c0fb409fea..ce8637b3afa9 100644
--- a/arch/mips/au1000/mtx-1/platform.c
+++ b/arch/mips/au1000/mtx-1/platform.c
@@ -22,9 +22,32 @@
 #include <linux/types.h>
 #include <linux/platform_device.h>
 #include <linux/leds.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
 
 #include <asm/gpio.h>
 
+static struct gpio_keys_button mtx1_gpio_button[] = {
+        {
+                .gpio = 207,
+                .code = BTN_0,
+                .desc = "System button",
+        }
+};
+
+static struct gpio_keys_platform_data mtx1_buttons_data = {
+        .buttons = mtx1_gpio_button,
+        .nbuttons = ARRAY_SIZE(mtx1_gpio_button),
+};
+
+static struct platform_device mtx1_button = {
+        .name = "gpio-keys",
+        .id = -1,
+        .dev = {
+                .platform_data = &mtx1_buttons_data,
+        }
+};
+
 static struct resource mtx1_wdt_res[] = {
         [0] = {
                 .start  = 15,
@@ -66,11 +89,13 @@ static struct platform_device mtx1_gpio_leds = {
 
 static struct __initdata platform_device * mtx1_devs[] = {
         &mtx1_gpio_leds,
-        &mtx1_wdt
+        &mtx1_wdt,
+        &mtx1_button
 };
 
 static int __init mtx1_register_devices(void)
 {
+        gpio_direction_input(207);
         return platform_add_devices(mtx1_devs, ARRAY_SIZE(mtx1_devs));
 }
 
diff --git a/arch/mips/au1000/pb1000/init.c b/arch/mips/au1000/pb1000/init.c
index ddccaf6997d0..2515b9fb24af 100644
--- a/arch/mips/au1000/pb1000/init.c
+++ b/arch/mips/au1000/pb1000/init.c
@@ -52,8 +52,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg2;
 
-        mips_machtype = MACH_PB1000;
-
         prom_init_cmdline();
         memsize_str = prom_getenv("memsize");
         if (!memsize_str) {
diff --git a/arch/mips/au1000/pb1100/init.c b/arch/mips/au1000/pb1100/init.c
index c93fd39b4aba..490c3801c275 100644
--- a/arch/mips/au1000/pb1100/init.c
+++ b/arch/mips/au1000/pb1100/init.c
@@ -53,8 +53,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg3;
 
-        mips_machtype = MACH_PB1100;
-
         prom_init_cmdline();
 
         memsize_str = prom_getenv("memsize");
diff --git a/arch/mips/au1000/pb1200/init.c b/arch/mips/au1000/pb1200/init.c
index c251570749ee..069ed45f04f2 100644
--- a/arch/mips/au1000/pb1200/init.c
+++ b/arch/mips/au1000/pb1200/init.c
@@ -53,8 +53,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg2;
 
-        mips_machtype = MACH_PB1200;
-
         prom_init_cmdline();
         memsize_str = prom_getenv("memsize");
         if (!memsize_str) {
diff --git a/arch/mips/au1000/pb1500/init.c b/arch/mips/au1000/pb1500/init.c
index 507d4b204161..db558c967048 100644
--- a/arch/mips/au1000/pb1500/init.c
+++ b/arch/mips/au1000/pb1500/init.c
@@ -53,8 +53,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg2;
 
-        mips_machtype = MACH_PB1500;
-
         prom_init_cmdline();
         memsize_str = prom_getenv("memsize");
         if (!memsize_str) {
diff --git a/arch/mips/au1000/pb1550/init.c b/arch/mips/au1000/pb1550/init.c
index b03eee601e36..b716363ea564 100644
--- a/arch/mips/au1000/pb1550/init.c
+++ b/arch/mips/au1000/pb1550/init.c
@@ -53,8 +53,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg2;
 
-        mips_machtype = MACH_PB1550;
-
         prom_init_cmdline();
         memsize_str = prom_getenv("memsize");
         if (!memsize_str) {
diff --git a/arch/mips/au1000/xxs1500/init.c b/arch/mips/au1000/xxs1500/init.c
index 6532939f377a..7e6878c1b0a5 100644
--- a/arch/mips/au1000/xxs1500/init.c
+++ b/arch/mips/au1000/xxs1500/init.c
@@ -52,8 +52,6 @@ void __init prom_init(void)
         prom_argv = (char **) fw_arg1;
         prom_envp = (char **) fw_arg2;
 
-        mips_machtype = MACH_XXS1500;   /* set the platform # */
-
         prom_init_cmdline();
 
         memsize_str = prom_getenv("memsize");
diff --git a/arch/mips/basler/excite/Kconfig b/arch/mips/basler/excite/Kconfig
new file mode 100644
index 000000000000..ba506075608b
--- /dev/null
+++ b/arch/mips/basler/excite/Kconfig
@@ -0,0 +1,9 @@
+config BASLER_EXCITE_PROTOTYPE
+        bool "Support for pre-release units"
+        depends on BASLER_EXCITE
+        default n
+        help
+          Pre-series (prototype) units are different from later ones in
+          some ways. Select this option if you have one of these. Please
+          note that a kernel built with this option selected will not be
+          able to run on normal units.
diff --git a/arch/mips/basler/excite/excite_iodev.c b/arch/mips/basler/excite/excite_iodev.c
index 6af0b21ebc32..476d20e08d0e 100644
--- a/arch/mips/basler/excite/excite_iodev.c
+++ b/arch/mips/basler/excite/excite_iodev.c
@@ -48,7 +48,7 @@ static DECLARE_WAIT_QUEUE_HEAD(wq);
 
 
 
-static struct file_operations fops =
+static const struct file_operations fops =
 {
         .owner          = THIS_MODULE,
         .open           = iodev_open,
diff --git a/arch/mips/basler/excite/excite_prom.c b/arch/mips/basler/excite/excite_prom.c
index 2d752c2f6e59..68d8bc597e34 100644
--- a/arch/mips/basler/excite/excite_prom.c
+++ b/arch/mips/basler/excite/excite_prom.c
@@ -135,8 +135,6 @@ void __init prom_init(void)
 #ifdef CONFIG_64BIT
 #       error 64 bit support not implemented
 #endif /* CONFIG_64BIT */
-
-        mips_machtype = MACH_TITAN_EXCITE;
 }
 
 /* This is called from free_initmem(), so we need to provide it */
diff --git a/arch/mips/cobalt/reset.c b/arch/mips/cobalt/reset.c
index 71eb4ccc4bc1..516b4428df4e 100644
--- a/arch/mips/cobalt/reset.c
+++ b/arch/mips/cobalt/reset.c
@@ -10,9 +10,10 @@
  */
 #include <linux/init.h>
 #include <linux/io.h>
-#include <linux/jiffies.h>
 #include <linux/leds.h>
 
+#include <asm/processor.h>
+
 #include <cobalt.h>
 
 #define RESET_PORT      ((void __iomem *)CKSEG1ADDR(0x1c000000))
@@ -29,28 +30,15 @@ device_initcall(ledtrig_power_off_init);
 
 void cobalt_machine_halt(void)
 {
-        int state, last, diff;
-        unsigned long mark;
-
         /*
          * turn on power off LED on RaQ
-         *
-         * restart if ENTER and SELECT are pressed
          */
-
-        last = COBALT_KEY_PORT;
-
         led_trigger_event(power_off_led_trigger, LED_FULL);
 
-        for (state = 0;;) {
-                diff = COBALT_KEY_PORT ^ last;
-                last ^= diff;
-
-                if((diff & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)) && !(~last & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)))
-                        writeb(RESET, RESET_PORT);
-
-                for (mark = jiffies; jiffies - mark < HZ;)
-                        ;
+        local_irq_disable();
+        while (1) {
+                if (cpu_wait)
+                        cpu_wait();
         }
 }
 
diff --git a/arch/mips/configs/atlas_defconfig b/arch/mips/configs/atlas_defconfig
index 62bcc887f2ca..3443f6cd57bb 100644
--- a/arch/mips/configs/atlas_defconfig
+++ b/arch/mips/configs/atlas_defconfig
@@ -37,7 +37,6 @@ CONFIG_MIPS_ATLAS=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_MIPS_ATLAS=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/bigsur_defconfig b/arch/mips/configs/bigsur_defconfig
index 3c70c9d16d01..abf70d74e9d7 100644
--- a/arch/mips/configs/bigsur_defconfig
+++ b/arch/mips/configs/bigsur_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_SIBYTE_BIGSUR=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/capcella_defconfig b/arch/mips/configs/capcella_defconfig
index 8ecbbb226c76..a94f14b5c8fa 100644
--- a/arch/mips/configs/capcella_defconfig
+++ b/arch/mips/configs/capcella_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/cobalt_defconfig b/arch/mips/configs/cobalt_defconfig
index 36c13039e237..b7295e988381 100644
--- a/arch/mips/configs/cobalt_defconfig
+++ b/arch/mips/configs/cobalt_defconfig
@@ -24,7 +24,6 @@ CONFIG_MIPS_COBALT=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MIPS_COBALT=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/db1000_defconfig b/arch/mips/configs/db1000_defconfig
index 5a8b7acb7dd7..36578968d386 100644
--- a/arch/mips/configs/db1000_defconfig
+++ b/arch/mips/configs/db1000_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_DB1000=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_DB1000=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/db1100_defconfig b/arch/mips/configs/db1100_defconfig
index d4ed90bca269..5a90740c363a 100644
--- a/arch/mips/configs/db1100_defconfig
+++ b/arch/mips/configs/db1100_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_DB1100=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_DB1100=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/db1200_defconfig b/arch/mips/configs/db1200_defconfig
index a055657e6983..76f37a1159fe 100644
--- a/arch/mips/configs/db1200_defconfig
+++ b/arch/mips/configs/db1200_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_DB1200=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_DB1200=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/db1500_defconfig b/arch/mips/configs/db1500_defconfig
index 0ad08cf446ec..508c91944f30 100644
--- a/arch/mips/configs/db1500_defconfig
+++ b/arch/mips/configs/db1500_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_DB1500=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_DB1500=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/db1550_defconfig b/arch/mips/configs/db1550_defconfig
index 057c7d429c80..0c2c70d21db9 100644
--- a/arch/mips/configs/db1550_defconfig
+++ b/arch/mips/configs/db1550_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_DB1550=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_DB1550=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/decstation_defconfig b/arch/mips/configs/decstation_defconfig
index 2fb350432669..58c2cd68c3a7 100644
--- a/arch/mips/configs/decstation_defconfig
+++ b/arch/mips/configs/decstation_defconfig
@@ -37,7 +37,6 @@ CONFIG_MACH_DECSTATION=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_MACH_DECSTATION=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/e55_defconfig b/arch/mips/configs/e55_defconfig
index d0d07faeb844..90d81f5dcebc 100644
--- a/arch/mips/configs/e55_defconfig
+++ b/arch/mips/configs/e55_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/emma2rh_defconfig b/arch/mips/configs/emma2rh_defconfig
index d73d965f7615..f9a003c2b3a1 100644
--- a/arch/mips/configs/emma2rh_defconfig
+++ b/arch/mips/configs/emma2rh_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 CONFIG_MARKEINS=y
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_MARKEINS=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/excite_defconfig b/arch/mips/configs/excite_defconfig
index 17a866057fd4..15efacc75d73 100644
--- a/arch/mips/configs/excite_defconfig
+++ b/arch/mips/configs/excite_defconfig
@@ -38,7 +38,6 @@ CONFIG_BASLER_EXCITE=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_BASLER_EXCITE=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/fulong_defconfig b/arch/mips/configs/fulong_defconfig
index 4ef39a0527cc..5887a1735fba 100644
--- a/arch/mips/configs/fulong_defconfig
+++ b/arch/mips/configs/fulong_defconfig
@@ -23,7 +23,6 @@ CONFIG_LEMOTE_FULONG=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -33,7 +32,6 @@ CONFIG_LEMOTE_FULONG=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/ip22_defconfig b/arch/mips/configs/ip22_defconfig
index 670039bb1a7c..4f5e56c9335e 100644
--- a/arch/mips/configs/ip22_defconfig
+++ b/arch/mips/configs/ip22_defconfig
@@ -25,7 +25,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 CONFIG_SGI_IP22=y
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -36,7 +35,6 @@ CONFIG_SGI_IP22=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/ip27_defconfig b/arch/mips/configs/ip27_defconfig
index 892d4c38fd0d..f40e437bd9e5 100644
--- a/arch/mips/configs/ip27_defconfig
+++ b/arch/mips/configs/ip27_defconfig
@@ -24,7 +24,6 @@ CONFIG_MIPS=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 CONFIG_SGI_IP27=y
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_SGI_IP27=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/ip32_defconfig b/arch/mips/configs/ip32_defconfig
index 47f49b60c5d6..2c5c624c5d42 100644
--- a/arch/mips/configs/ip32_defconfig
+++ b/arch/mips/configs/ip32_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_SGI_IP32=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/jazz_defconfig b/arch/mips/configs/jazz_defconfig
index fa655e247ecc..56148745e8f2 100644
--- a/arch/mips/configs/jazz_defconfig
+++ b/arch/mips/configs/jazz_defconfig
@@ -37,7 +37,6 @@ CONFIG_MACH_JAZZ=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_MACH_JAZZ=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/jmr3927_defconfig b/arch/mips/configs/jmr3927_defconfig
index eb96791c33ea..a7cd67753aac 100644
--- a/arch/mips/configs/jmr3927_defconfig
+++ b/arch/mips/configs/jmr3927_defconfig
@@ -24,7 +24,6 @@ CONFIG_MIPS=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MIPS=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 CONFIG_TOSHIBA_JMR3927=y
@@ -464,7 +462,6 @@ CONFIG_SERIAL_TXX9_STDSERIAL=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -482,6 +479,20 @@ CONFIG_DEVPORT=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=y
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/configs/lasat_defconfig b/arch/mips/configs/lasat_defconfig
index 2c665fcef089..e6aef999854c 100644
--- a/arch/mips/configs/lasat_defconfig
+++ b/arch/mips/configs/lasat_defconfig
@@ -25,7 +25,6 @@ CONFIG_LASAT=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -36,7 +35,6 @@ CONFIG_LASAT=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/malta_defconfig b/arch/mips/configs/malta_defconfig
index 4b7e43c9f69a..3d0da952811c 100644
--- a/arch/mips/configs/malta_defconfig
+++ b/arch/mips/configs/malta_defconfig
@@ -25,7 +25,6 @@ CONFIG_MIPS_MALTA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -36,7 +35,6 @@ CONFIG_MIPS_MALTA=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/mipssim_defconfig b/arch/mips/configs/mipssim_defconfig
index 61b72f5a953e..6db0bdaefb27 100644
--- a/arch/mips/configs/mipssim_defconfig
+++ b/arch/mips/configs/mipssim_defconfig
@@ -26,7 +26,6 @@ CONFIG_MIPS_SIM=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -37,7 +36,6 @@ CONFIG_MIPS_SIM=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/mpc30x_defconfig b/arch/mips/configs/mpc30x_defconfig
index 8334350d7229..27e23fc9363a 100644
--- a/arch/mips/configs/mpc30x_defconfig
+++ b/arch/mips/configs/mpc30x_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/msp71xx_defconfig b/arch/mips/configs/msp71xx_defconfig
index 69278999c9a2..b12b73f6d74f 100644
--- a/arch/mips/configs/msp71xx_defconfig
+++ b/arch/mips/configs/msp71xx_defconfig
@@ -38,7 +38,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_MACH_VR41XX is not set
 CONFIG_PMC_MSP=y
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_PMC_MSP=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/mtx1_defconfig b/arch/mips/configs/mtx1_defconfig
index b536d7c63790..fa3aa3919448 100644
--- a/arch/mips/configs/mtx1_defconfig
+++ b/arch/mips/configs/mtx1_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_ALCHEMY=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_ALCHEMY=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
@@ -1617,6 +1615,7 @@ CONFIG_INPUT_EVBUG=m
 #
 CONFIG_INPUT_KEYBOARD=y
 CONFIG_KEYBOARD_ATKBD=y
+CONFIG_KEYBOARD_GPIO=y
 CONFIG_KEYBOARD_SUNKBD=m
 CONFIG_KEYBOARD_LKKBD=m
 CONFIG_KEYBOARD_XTKBD=m
diff --git a/arch/mips/configs/pb1100_defconfig b/arch/mips/configs/pb1100_defconfig
index 703d28db05b9..1d0157d3a5bb 100644
--- a/arch/mips/configs/pb1100_defconfig
+++ b/arch/mips/configs/pb1100_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_PB1100=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_PB1100=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/pb1500_defconfig b/arch/mips/configs/pb1500_defconfig
index 82f0c5cee0dc..d0491a05ee58 100644
--- a/arch/mips/configs/pb1500_defconfig
+++ b/arch/mips/configs/pb1500_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_PB1500=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_PB1500=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/pb1550_defconfig b/arch/mips/configs/pb1550_defconfig
index 147a4fc7fdd8..16d78d3cd2aa 100644
--- a/arch/mips/configs/pb1550_defconfig
+++ b/arch/mips/configs/pb1550_defconfig
@@ -38,7 +38,6 @@ CONFIG_MIPS_PB1550=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -48,7 +47,6 @@ CONFIG_MIPS_PB1550=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/pnx8550-jbs_defconfig b/arch/mips/configs/pnx8550-jbs_defconfig
index f6906b069e04..518a60892b78 100644
--- a/arch/mips/configs/pnx8550-jbs_defconfig
+++ b/arch/mips/configs/pnx8550-jbs_defconfig
@@ -37,7 +37,6 @@ CONFIG_PNX8550_JBS=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_PNX8550_JBS=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/pnx8550-stb810_defconfig b/arch/mips/configs/pnx8550-stb810_defconfig
index b741f81696fb..68351eb81bc8 100644
--- a/arch/mips/configs/pnx8550-stb810_defconfig
+++ b/arch/mips/configs/pnx8550-stb810_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 CONFIG_PNX8550_STB810=y
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_PNX8550_STB810=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/qemu_defconfig b/arch/mips/configs/qemu_defconfig
index b3caf5125c15..72ca147f9422 100644
--- a/arch/mips/configs/qemu_defconfig
+++ b/arch/mips/configs/qemu_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-CONFIG_QEMU=y
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_QEMU=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/rbhma4200_defconfig b/arch/mips/configs/rbhma4200_defconfig
index 9383a598094b..470f6f4d3ea2 100644
--- a/arch/mips/configs/rbhma4200_defconfig
+++ b/arch/mips/configs/rbhma4200_defconfig
@@ -24,7 +24,6 @@ CONFIG_MIPS=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MIPS=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
@@ -431,7 +429,6 @@ CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -449,6 +446,20 @@ CONFIG_DEVPORT=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=m
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/configs/rbhma4500_defconfig b/arch/mips/configs/rbhma4500_defconfig
index d1b56cc0fd7c..5a39f56b175e 100644
--- a/arch/mips/configs/rbhma4500_defconfig
+++ b/arch/mips/configs/rbhma4500_defconfig
@@ -24,7 +24,6 @@ CONFIG_MIPS=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MIPS=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
@@ -450,7 +448,6 @@ CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -479,6 +476,20 @@ CONFIG_SPI_AT25=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=m
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/configs/rm200_defconfig b/arch/mips/configs/rm200_defconfig
index fc388118b114..56371b860eb0 100644
--- a/arch/mips/configs/rm200_defconfig
+++ b/arch/mips/configs/rm200_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/sb1250-swarm_defconfig b/arch/mips/configs/sb1250-swarm_defconfig
index c2798229cbfb..117470b60e34 100644
--- a/arch/mips/configs/sb1250-swarm_defconfig
+++ b/arch/mips/configs/sb1250-swarm_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_SIBYTE_SWARM=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/sead_defconfig b/arch/mips/configs/sead_defconfig
index 2b6282d132a8..3ee75b15c0b0 100644
--- a/arch/mips/configs/sead_defconfig
+++ b/arch/mips/configs/sead_defconfig
@@ -37,7 +37,6 @@ CONFIG_MIPS_SEAD=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_MIPS_SEAD=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/tb0219_defconfig b/arch/mips/configs/tb0219_defconfig
index 326aa7aa40ea..af82e1a1823c 100644
--- a/arch/mips/configs/tb0219_defconfig
+++ b/arch/mips/configs/tb0219_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/tb0226_defconfig b/arch/mips/configs/tb0226_defconfig
index 9fd0faeacf53..a95385b24546 100644
--- a/arch/mips/configs/tb0226_defconfig
+++ b/arch/mips/configs/tb0226_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/tb0287_defconfig b/arch/mips/configs/tb0287_defconfig
index 499b6bd7ee68..40d4a40a970e 100644
--- a/arch/mips/configs/tb0287_defconfig
+++ b/arch/mips/configs/tb0287_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/workpad_defconfig b/arch/mips/configs/workpad_defconfig
index b52256ca0b53..edf90b321fe6 100644
--- a/arch/mips/configs/workpad_defconfig
+++ b/arch/mips/configs/workpad_defconfig
@@ -24,7 +24,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -35,7 +34,6 @@ CONFIG_MACH_VR41XX=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/configs/wrppmc_defconfig b/arch/mips/configs/wrppmc_defconfig
index 7e410e10fed7..2e3c683b2052 100644
--- a/arch/mips/configs/wrppmc_defconfig
+++ b/arch/mips/configs/wrppmc_defconfig
@@ -37,7 +37,6 @@ CONFIG_WR_PPMC=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_WR_PPMC=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/configs/yosemite_defconfig b/arch/mips/configs/yosemite_defconfig
index acaf0e21bb00..b6178ffbc523 100644
--- a/arch/mips/configs/yosemite_defconfig
+++ b/arch/mips/configs/yosemite_defconfig
@@ -37,7 +37,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_MACH_VR41XX is not set
 CONFIG_PMC_YOSEMITE=y
-# CONFIG_QEMU is not set
 # CONFIG_MARKEINS is not set
 # CONFIG_SGI_IP22 is not set
 # CONFIG_SGI_IP27 is not set
@@ -47,7 +46,6 @@ CONFIG_PMC_YOSEMITE=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_RHONE is not set
 # CONFIG_SIBYTE_CARMEL is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_CRHINE is not set
 # CONFIG_SIBYTE_CRHONE is not set
diff --git a/arch/mips/dec/time.c b/arch/mips/dec/time.c
index 820e5331205f..60349062595a 100644
--- a/arch/mips/dec/time.c
+++ b/arch/mips/dec/time.c
@@ -161,7 +161,6 @@ static cycle_t dec_ioasic_hpt_read(void)
 
 void __init plat_time_init(void)
 {
-        mips_timer_state = dec_timer_state;
         mips_timer_ack = dec_timer_ack;
 
         if (!cpu_has_counter && IOASIC)
diff --git a/arch/mips/defconfig b/arch/mips/defconfig
index 670039bb1a7c..4f5e56c9335e 100644
--- a/arch/mips/defconfig
+++ b/arch/mips/defconfig
@@ -25,7 +25,6 @@ CONFIG_ZONE_DMA=y
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PMC_MSP is not set
 # CONFIG_PMC_YOSEMITE is not set
-# CONFIG_QEMU is not set
 CONFIG_SGI_IP22=y
 # CONFIG_SGI_IP27 is not set
 # CONFIG_SGI_IP32 is not set
@@ -36,7 +35,6 @@ CONFIG_SGI_IP22=y
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SIBYTE_LITTLESUR is not set
 # CONFIG_SIBYTE_SENTOSA is not set
-# CONFIG_SIBYTE_PTSWARM is not set
 # CONFIG_SIBYTE_BIGSUR is not set
 # CONFIG_SNI_RM is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
diff --git a/arch/mips/fw/arc/cmdline.c b/arch/mips/fw/arc/cmdline.c
index fd604ef28823..4ca4eef934a5 100644
--- a/arch/mips/fw/arc/cmdline.c
+++ b/arch/mips/fw/arc/cmdline.c
@@ -52,7 +52,7 @@ static char * __init move_firmware_args(char* cp)
                                 strcat(cp, used_arc[i][1]);
                                 cp += strlen(used_arc[i][1]);
                                 /* ... and now the argument */
-                                s = strstr(prom_argv(actr), "=");
+                                s = strchr(prom_argv(actr), '=');
                                 if (s) {
                                         s++;
                                         strcpy(cp, s);
diff --git a/arch/mips/fw/arc/init.c b/arch/mips/fw/arc/init.c
index e2f75b13312f..3ad8788b6eaa 100644
--- a/arch/mips/fw/arc/init.c
+++ b/arch/mips/fw/arc/init.c
@@ -12,6 +12,7 @@
 
 #include <asm/bootinfo.h>
 #include <asm/sgialib.h>
+#include <asm/smp-ops.h>
 
 #undef DEBUG_PROM_INIT
 
@@ -48,4 +49,11 @@ void __init prom_init(void)
         ArcRead(0, &c, 1, &cnt);
         ArcEnterInteractiveMode();
 #endif
+#ifdef CONFIG_SGI_IP27
+        {
+                extern struct plat_smp_ops ip27_smp_ops;
+
+                register_smp_ops(&ip27_smp_ops);
+        }
+#endif
 }
diff --git a/arch/mips/fw/cfe/cfe_api.c b/arch/mips/fw/cfe/cfe_api.c
index a9f69e4e40ac..717db74f7c6e 100644
--- a/arch/mips/fw/cfe/cfe_api.c
+++ b/arch/mips/fw/cfe/cfe_api.c
@@ -16,19 +16,16 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
-/*  *********************************************************************
-    *
-    *  Broadcom Common Firmware Environment (CFE)
-    *
-    *  Device Function stubs                    File: cfe_api.c
-    *
-    *  This module contains device function stubs (small routines to
-    *  call the standard "iocb" interface entry point to CFE).
-    *  There should be one routine here per iocb function call.
-    *
-    *  Authors:  Mitch Lichtenberg, Chris Demetriou
-    *
-    ********************************************************************* */
+/*
+ *
+ * Broadcom Common Firmware Environment (CFE)
+ *
+ * This module contains device function stubs (small routines to
+ * call the standard "iocb" interface entry point to CFE).
+ * There should be one routine here per iocb function call.
+ *
+ * Authors:  Mitch Lichtenberg, Chris Demetriou
+ */
 
 #include <asm/fw/cfe/cfe_api.h>
 #include "cfe_api_int.h"
@@ -37,12 +34,8 @@
 #define XPTR_FROM_NATIVE(n)     ((cfe_xptr_t) (intptr_t) (n))
 #define NATIVE_FROM_XPTR(x)     ((void *) (intptr_t) (x))
 
-#ifdef CFE_API_IMPL_NAMESPACE
-#define cfe_iocb_dispatch(a)            __cfe_iocb_dispatch(a)
-#endif
-int cfe_iocb_dispatch(cfe_xiocb_t * xiocb);
+int cfe_iocb_dispatch(struct cfe_xiocb *xiocb);
 
-#if defined(CFE_API_common) || defined(CFE_API_ALL)
 /*
  * Declare the dispatch function with args of "intptr_t".
  * This makes sure whatever model we're compiling in
@@ -53,27 +46,25 @@ int cfe_iocb_dispatch(cfe_xiocb_t * xiocb);
  */
 
 static int (*cfe_dispfunc) (intptr_t handle, intptr_t xiocb) = 0;
-static cfe_xuint_t cfe_handle = 0;
+static u64 cfe_handle = 0;
 
-int cfe_init(cfe_xuint_t handle, cfe_xuint_t ept)
+int cfe_init(u64 handle, u64 ept)
 {
         cfe_dispfunc = NATIVE_FROM_XPTR(ept);
         cfe_handle = handle;
         return 0;
 }
 
-int cfe_iocb_dispatch(cfe_xiocb_t * xiocb)
+int cfe_iocb_dispatch(struct cfe_xiocb * xiocb)
 {
         if (!cfe_dispfunc)
                 return -1;
         return (*cfe_dispfunc) ((intptr_t) cfe_handle, (intptr_t) xiocb);
 }
-#endif                          /* CFE_API_common || CFE_API_ALL */
 
-#if defined(CFE_API_close) || defined(CFE_API_ALL)
 int cfe_close(int handle)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_CLOSE;
         xiocb.xiocb_status = 0;
@@ -86,18 +77,16 @@ int cfe_close(int handle)
         return xiocb.xiocb_status;
 
 }
-#endif                          /* CFE_API_close || CFE_API_ALL */
 
-#if defined(CFE_API_cpu_start) || defined(CFE_API_ALL)
 int cfe_cpu_start(int cpu, void (*fn) (void), long sp, long gp, long a1)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_cpuctl_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
         xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
         xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_START;
         xiocb.plist.xiocb_cpuctl.gp_val = gp;
@@ -109,18 +98,16 @@ int cfe_cpu_start(int cpu, void (*fn) (void), long sp, long gp, long a1)
 
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_cpu_start || CFE_API_ALL */
 
-#if defined(CFE_API_cpu_stop) || defined(CFE_API_ALL)
 int cfe_cpu_stop(int cpu)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_cpuctl_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
         xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
         xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_STOP;
 
@@ -128,18 +115,16 @@ int cfe_cpu_stop(int cpu)
 
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_cpu_stop || CFE_API_ALL */
 
-#if defined(CFE_API_enumenv) || defined(CFE_API_ALL)
 int cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_envbuf_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
         xiocb.plist.xiocb_envbuf.enum_idx = idx;
         xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
         xiocb.plist.xiocb_envbuf.name_length = namelen;
@@ -150,20 +135,17 @@ int cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
 
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_enumenv || CFE_API_ALL */
 
-#if defined(CFE_API_enummem) || defined(CFE_API_ALL)
 int
-cfe_enummem(int idx, int flags, cfe_xuint_t * start, cfe_xuint_t * length,
-            cfe_xuint_t * type)
+cfe_enummem(int idx, int flags, u64 *start, u64 *length, u64 *type)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_FW_MEMENUM;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = flags;
-        xiocb.xiocb_psize = sizeof(xiocb_meminfo_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_meminfo);
         xiocb.plist.xiocb_meminfo.mi_idx = idx;
 
         cfe_iocb_dispatch(&xiocb);
@@ -177,30 +159,26 @@ cfe_enummem(int idx, int flags, cfe_xuint_t * start, cfe_xuint_t * length,
 
         return 0;
 }
-#endif                          /* CFE_API_enummem || CFE_API_ALL */
 
-#if defined(CFE_API_exit) || defined(CFE_API_ALL)
 int cfe_exit(int warm, int status)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_FW_RESTART;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = warm ? CFE_FLG_WARMSTART : 0;
-        xiocb.xiocb_psize = sizeof(xiocb_exitstat_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_exitstat);
         xiocb.plist.xiocb_exitstat.status = status;
 
         cfe_iocb_dispatch(&xiocb);
 
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_exit || CFE_API_ALL */
 
-#if defined(CFE_API_flushcache) || defined(CFE_API_ALL)
 int cfe_flushcache(int flg)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_FW_FLUSHCACHE;
         xiocb.xiocb_status = 0;
@@ -212,34 +190,30 @@ int cfe_flushcache(int flg)
 
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_flushcache || CFE_API_ALL */
 
-#if defined(CFE_API_getdevinfo) || defined(CFE_API_ALL)
 int cfe_getdevinfo(char *name)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_GETINFO;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
         xiocb.plist.xiocb_buffer.buf_offset = 0;
         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
-        xiocb.plist.xiocb_buffer.buf_length = cfe_strlen(name);
+        xiocb.plist.xiocb_buffer.buf_length = strlen(name);
 
         cfe_iocb_dispatch(&xiocb);
 
         if (xiocb.xiocb_status < 0)
                 return xiocb.xiocb_status;
-        return xiocb.plist.xiocb_buffer.buf_devflags;
+        return xiocb.plist.xiocb_buffer.buf_ioctlcmd;
 }
-#endif                          /* CFE_API_getdevinfo || CFE_API_ALL */
 
-#if defined(CFE_API_getenv) || defined(CFE_API_ALL)
 int cfe_getenv(char *name, char *dest, int destlen)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         *dest = 0;
 
@@ -247,10 +221,10 @@ int cfe_getenv(char *name, char *dest, int destlen)
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_envbuf_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
         xiocb.plist.xiocb_envbuf.enum_idx = 0;
         xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
-        xiocb.plist.xiocb_envbuf.name_length = cfe_strlen(name);
+        xiocb.plist.xiocb_envbuf.name_length = strlen(name);
         xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(dest);
         xiocb.plist.xiocb_envbuf.val_length = destlen;
 
@@ -258,18 +232,16 @@ int cfe_getenv(char *name, char *dest, int destlen)
 
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_getenv || CFE_API_ALL */
 
-#if defined(CFE_API_getfwinfo) || defined(CFE_API_ALL)
 int cfe_getfwinfo(cfe_fwinfo_t * info)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_FW_GETINFO;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_fwinfo_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_fwinfo);
 
         cfe_iocb_dispatch(&xiocb);
 
@@ -292,12 +264,10 @@ int cfe_getfwinfo(cfe_fwinfo_t * info)
 
         return 0;
 }
-#endif                          /* CFE_API_getfwinfo || CFE_API_ALL */
 
-#if defined(CFE_API_getstdhandle) || defined(CFE_API_ALL)
 int cfe_getstdhandle(int flg)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_GETHANDLE;
         xiocb.xiocb_status = 0;
@@ -311,23 +281,17 @@ int cfe_getstdhandle(int flg)
                 return xiocb.xiocb_status;
         return xiocb.xiocb_handle;
 }
-#endif                          /* CFE_API_getstdhandle || CFE_API_ALL */
 
-#if defined(CFE_API_getticks) || defined(CFE_API_ALL)
 int64_t
-#ifdef CFE_API_IMPL_NAMESPACE
-__cfe_getticks(void)
-#else
 cfe_getticks(void)
-#endif
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_FW_GETTIME;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_time_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_time);
         xiocb.plist.xiocb_time.ticks = 0;
 
         cfe_iocb_dispatch(&xiocb);
@@ -335,18 +299,16 @@ cfe_getticks(void)
         return xiocb.plist.xiocb_time.ticks;
 
 }
-#endif                          /* CFE_API_getticks || CFE_API_ALL */
 
-#if defined(CFE_API_inpstat) || defined(CFE_API_ALL)
 int cfe_inpstat(int handle)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_INPSTAT;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = handle;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_inpstat_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_inpstat);
         xiocb.plist.xiocb_inpstat.inp_status = 0;
 
         cfe_iocb_dispatch(&xiocb);
@@ -355,20 +317,18 @@ int cfe_inpstat(int handle)
                 return xiocb.xiocb_status;
         return xiocb.plist.xiocb_inpstat.inp_status;
 }
-#endif                          /* CFE_API_inpstat || CFE_API_ALL */
 
-#if defined(CFE_API_ioctl) || defined(CFE_API_ALL)
 int
 cfe_ioctl(int handle, unsigned int ioctlnum, unsigned char *buffer,
-          int length, int *retlen, cfe_xuint_t offset)
+          int length, int *retlen, u64 offset)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_IOCTL;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = handle;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
         xiocb.plist.xiocb_buffer.buf_offset = offset;
         xiocb.plist.xiocb_buffer.buf_ioctlcmd = ioctlnum;
         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
@@ -380,21 +340,19 @@ cfe_ioctl(int handle, unsigned int ioctlnum, unsigned char *buffer,
                 *retlen = xiocb.plist.xiocb_buffer.buf_retlen;
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_ioctl || CFE_API_ALL */
 
-#if defined(CFE_API_open) || defined(CFE_API_ALL)
 int cfe_open(char *name)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_OPEN;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
         xiocb.plist.xiocb_buffer.buf_offset = 0;
         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
-        xiocb.plist.xiocb_buffer.buf_length = cfe_strlen(name);
+        xiocb.plist.xiocb_buffer.buf_length = strlen(name);
 
         cfe_iocb_dispatch(&xiocb);
 
@@ -402,27 +360,21 @@ int cfe_open(char *name)
                 return xiocb.xiocb_status;
         return xiocb.xiocb_handle;
 }
-#endif                          /* CFE_API_open || CFE_API_ALL */
 
-#if defined(CFE_API_read) || defined(CFE_API_ALL)
 int cfe_read(int handle, unsigned char *buffer, int length)
 {
         return cfe_readblk(handle, 0, buffer, length);
 }
-#endif                          /* CFE_API_read || CFE_API_ALL */
 
-#if defined(CFE_API_readblk) || defined(CFE_API_ALL)
-int
-cfe_readblk(int handle, cfe_xint_t offset, unsigned char *buffer,
-            int length)
+int cfe_readblk(int handle, s64 offset, unsigned char *buffer, int length)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_READ;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = handle;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
         xiocb.plist.xiocb_buffer.buf_offset = offset;
         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
         xiocb.plist.xiocb_buffer.buf_length = length;
@@ -433,62 +385,41 @@ cfe_readblk(int handle, cfe_xint_t offset, unsigned char *buffer,
                 return xiocb.xiocb_status;
         return xiocb.plist.xiocb_buffer.buf_retlen;
 }
-#endif                          /* CFE_API_readblk || CFE_API_ALL */
 
-#if defined(CFE_API_setenv) || defined(CFE_API_ALL)
 int cfe_setenv(char *name, char *val)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = 0;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_envbuf_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
         xiocb.plist.xiocb_envbuf.enum_idx = 0;
         xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
-        xiocb.plist.xiocb_envbuf.name_length = cfe_strlen(name);
+        xiocb.plist.xiocb_envbuf.name_length = strlen(name);
         xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
-        xiocb.plist.xiocb_envbuf.val_length = cfe_strlen(val);
+        xiocb.plist.xiocb_envbuf.val_length = strlen(val);
 
         cfe_iocb_dispatch(&xiocb);
 
         return xiocb.xiocb_status;
 }
-#endif                          /* CFE_API_setenv || CFE_API_ALL */
-
-#if (defined(CFE_API_strlen) || defined(CFE_API_ALL)) \
-    && !defined(CFE_API_STRLEN_CUSTOM)
-int cfe_strlen(char *name)
-{
-        int count = 0;
-
-        while (*name++)
-                count++;
 
-        return count;
-}
-#endif                          /* CFE_API_strlen || CFE_API_ALL */
-
-#if defined(CFE_API_write) || defined(CFE_API_ALL)
 int cfe_write(int handle, unsigned char *buffer, int length)
 {
         return cfe_writeblk(handle, 0, buffer, length);
 }
-#endif                          /* CFE_API_write || CFE_API_ALL */
 
-#if defined(CFE_API_writeblk) || defined(CFE_API_ALL)
-int
-cfe_writeblk(int handle, cfe_xint_t offset, unsigned char *buffer,
-             int length)
+int cfe_writeblk(int handle, s64 offset, unsigned char *buffer, int length)
 {
-        cfe_xiocb_t xiocb;
+        struct cfe_xiocb xiocb;
 
         xiocb.xiocb_fcode = CFE_CMD_DEV_WRITE;
         xiocb.xiocb_status = 0;
         xiocb.xiocb_handle = handle;
         xiocb.xiocb_flags = 0;
-        xiocb.xiocb_psize = sizeof(xiocb_buffer_t);
+        xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
         xiocb.plist.xiocb_buffer.buf_offset = offset;
         xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
         xiocb.plist.xiocb_buffer.buf_length = length;
@@ -499,4 +430,3 @@ cfe_writeblk(int handle, cfe_xint_t offset, unsigned char *buffer,
                 return xiocb.xiocb_status;
         return xiocb.plist.xiocb_buffer.buf_retlen;
 }
-#endif                          /* CFE_API_writeblk || CFE_API_ALL */
diff --git a/arch/mips/fw/cfe/cfe_api_int.h b/arch/mips/fw/cfe/cfe_api_int.h
index f7e5a64b55f3..d9759e646956 100644
--- a/arch/mips/fw/cfe/cfe_api_int.h
+++ b/arch/mips/fw/cfe/cfe_api_int.h
@@ -15,28 +15,12 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
-
-/*  *********************************************************************
-    *
-    *  Broadcom Common Firmware Environment (CFE)
-    *
-    *  Device function prototypes               File: cfe_api_int.h
-    *
-    *  This header defines all internal types and macros for the
-    *  library.  This is stuff that's not exported to an app
-    *  using the library.
-    *
-    *  Authors:  Mitch Lichtenberg, Chris Demetriou
-    *
-    ********************************************************************* */
-
 #ifndef CFE_API_INT_H
 #define CFE_API_INT_H
 
-/*  *********************************************************************
-    *  Constants
-    ********************************************************************* */
-
+/*
+ * Constants.
+ */
 #define CFE_CMD_FW_GETINFO      0
 #define CFE_CMD_FW_RESTART      1
 #define CFE_CMD_FW_BOOT         2
@@ -64,89 +48,101 @@
 
 #define CFE_CMD_VENDOR_USE      0x8000  /* codes above this are for customer use */
 
-/*  *********************************************************************
-    *  Structures
-    ********************************************************************* */
+/*
+ * Structures.
+ */
 
-typedef uint64_t cfe_xuint_t;
-typedef int64_t cfe_xint_t;
-typedef int64_t cfe_xptr_t;
+/* eeek, signed "pointers" */
+typedef s64 cfe_xptr_t;
 
-typedef struct xiocb_buffer_s {
-        cfe_xuint_t buf_offset;         /* offset on device (bytes) */
+struct xiocb_buffer {
+        u64 buf_offset;         /* offset on device (bytes) */
         cfe_xptr_t  buf_ptr;            /* pointer to a buffer */
-        cfe_xuint_t buf_length;         /* length of this buffer */
-        cfe_xuint_t buf_retlen;         /* returned length (for read ops) */
-        cfe_xuint_t buf_ioctlcmd;       /* IOCTL command (used only for IOCTLs) */
-} xiocb_buffer_t;
-
-#define buf_devflags buf_ioctlcmd       /* returned device info flags */
+        u64 buf_length;         /* length of this buffer */
+        u64 buf_retlen;         /* returned length (for read ops) */
+        u64 buf_ioctlcmd;       /* IOCTL command (used only for IOCTLs) */
+};
 
-typedef struct xiocb_inpstat_s {
-        cfe_xuint_t inp_status;         /* 1 means input available */
-} xiocb_inpstat_t;
+struct xiocb_inpstat {
+        u64 inp_status;         /* 1 means input available */
+};
 
-typedef struct xiocb_envbuf_s {
-        cfe_xint_t enum_idx;            /* 0-based enumeration index */
+struct xiocb_envbuf {
+        s64 enum_idx;           /* 0-based enumeration index */
         cfe_xptr_t name_ptr;            /* name string buffer */
-        cfe_xint_t name_length;         /* size of name buffer */
+        s64 name_length;                /* size of name buffer */
         cfe_xptr_t val_ptr;             /* value string buffer */
-        cfe_xint_t val_length;          /* size of value string buffer */
-} xiocb_envbuf_t;
-
-typedef struct xiocb_cpuctl_s {
-        cfe_xuint_t cpu_number;         /* cpu number to control */
-        cfe_xuint_t cpu_command;        /* command to issue to CPU */
-        cfe_xuint_t start_addr;         /* CPU start address */
-        cfe_xuint_t gp_val;             /* starting GP value */
-        cfe_xuint_t sp_val;             /* starting SP value */
-        cfe_xuint_t a1_val;             /* starting A1 value */
-} xiocb_cpuctl_t;
-
-typedef struct xiocb_time_s {
-        cfe_xint_t ticks;               /* current time in ticks */
-} xiocb_time_t;
-
-typedef struct xiocb_exitstat_s {
-        cfe_xint_t status;
-} xiocb_exitstat_t;
-
-typedef struct xiocb_meminfo_s {
-        cfe_xint_t mi_idx;              /* 0-based enumeration index */
-        cfe_xint_t mi_type;             /* type of memory block */
-        cfe_xuint_t mi_addr;            /* physical start address */
-        cfe_xuint_t mi_size;            /* block size */
-} xiocb_meminfo_t;
-
-typedef struct xiocb_fwinfo_s {
-        cfe_xint_t fwi_version;         /* major, minor, eco version */
-        cfe_xint_t fwi_totalmem;        /* total installed mem */
-        cfe_xint_t fwi_flags;           /* various flags */
-        cfe_xint_t fwi_boardid;         /* board ID */
-        cfe_xint_t fwi_bootarea_va;     /* VA of boot area */
-        cfe_xint_t fwi_bootarea_pa;     /* PA of boot area */
-        cfe_xint_t fwi_bootarea_size;   /* size of boot area */
-        cfe_xint_t fwi_reserved1;
-        cfe_xint_t fwi_reserved2;
-        cfe_xint_t fwi_reserved3;
-} xiocb_fwinfo_t;
-
-typedef struct cfe_xiocb_s {
-        cfe_xuint_t xiocb_fcode;        /* IOCB function code */
-        cfe_xint_t xiocb_status;        /* return status */
-        cfe_xint_t xiocb_handle;        /* file/device handle */
-        cfe_xuint_t xiocb_flags;        /* flags for this IOCB */
-        cfe_xuint_t xiocb_psize;        /* size of parameter list */
+        s64 val_length;         /* size of value string buffer */
+};
+
+struct xiocb_cpuctl {
+        u64 cpu_number;         /* cpu number to control */
+        u64 cpu_command;        /* command to issue to CPU */
+        u64 start_addr;         /* CPU start address */
+        u64 gp_val;             /* starting GP value */
+        u64 sp_val;             /* starting SP value */
+        u64 a1_val;             /* starting A1 value */
+};
+
+struct xiocb_time {
+        s64 ticks;              /* current time in ticks */
+};
+
+struct xiocb_exitstat{
+        s64 status;
+};
+
+struct xiocb_meminfo {
+        s64 mi_idx;             /* 0-based enumeration index */
+        s64 mi_type;            /* type of memory block */
+        u64 mi_addr;            /* physical start address */
+        u64 mi_size;            /* block size */
+};
+
+struct xiocb_fwinfo {
+        s64 fwi_version;                /* major, minor, eco version */
+        s64 fwi_totalmem;       /* total installed mem */
+        s64 fwi_flags;          /* various flags */
+        s64 fwi_boardid;                /* board ID */
+        s64 fwi_bootarea_va;    /* VA of boot area */
+        s64 fwi_bootarea_pa;    /* PA of boot area */
+        s64 fwi_bootarea_size;  /* size of boot area */
+        s64 fwi_reserved1;
+        s64 fwi_reserved2;
+        s64 fwi_reserved3;
+};
+
+struct cfe_xiocb {
+        u64 xiocb_fcode;        /* IOCB function code */
+        s64 xiocb_status;       /* return status */
+        s64 xiocb_handle;       /* file/device handle */
+        u64 xiocb_flags;        /* flags for this IOCB */
+        u64 xiocb_psize;        /* size of parameter list */
         union {
-                xiocb_buffer_t xiocb_buffer;    /* buffer parameters */
-                xiocb_inpstat_t xiocb_inpstat;  /* input status parameters */
-                xiocb_envbuf_t xiocb_envbuf;    /* environment function parameters */
-                xiocb_cpuctl_t xiocb_cpuctl;    /* CPU control parameters */
-                xiocb_time_t xiocb_time;        /* timer parameters */
-                xiocb_meminfo_t xiocb_meminfo;  /* memory arena info parameters */
-                xiocb_fwinfo_t xiocb_fwinfo;    /* firmware information */
-                xiocb_exitstat_t xiocb_exitstat;        /* Exit Status */
+                /* buffer parameters */
+                struct xiocb_buffer xiocb_buffer;
+
+                /* input status parameters */
+                struct xiocb_inpstat xiocb_inpstat;
+
+                /* environment function parameters */
+                struct xiocb_envbuf xiocb_envbuf;
+
+                /* CPU control parameters */
+                struct xiocb_cpuctl xiocb_cpuctl;
+
+                /* timer parameters */
+                struct xiocb_time xiocb_time;
+
+                /* memory arena info parameters */
+                struct xiocb_meminfo xiocb_meminfo;
+
+                /* firmware information */
+                struct xiocb_fwinfo xiocb_fwinfo;
+
+                /* Exit Status */
+                struct xiocb_exitstat xiocb_exitstat;
         } plist;
-} cfe_xiocb_t;
+};
 
-#endif                          /* CFE_API_INT_H */
+#endif /* CFE_API_INT_H */
diff --git a/arch/mips/fw/lib/Makefile b/arch/mips/fw/lib/Makefile
new file mode 100644
index 000000000000..84befc968fc4
--- /dev/null
+++ b/arch/mips/fw/lib/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for generic prom monitor library routines under Linux.
+#
+
+lib-$(CONFIG_64BIT)     += call_o32.o
diff --git a/arch/mips/fw/lib/call_o32.S b/arch/mips/fw/lib/call_o32.S
new file mode 100644
index 000000000000..bdf7d1d4081a
--- /dev/null
+++ b/arch/mips/fw/lib/call_o32.S
@@ -0,0 +1,97 @@
+/*
+ *      arch/mips/dec/prom/call_o32.S
+ *
+ *      O32 interface for the 64 (or N32) ABI.
+ *
+ *      Copyright (C) 2002  Maciej W. Rozycki
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <asm/asm.h>
+#include <asm/regdef.h>
+
+/* Maximum number of arguments supported.  Must be even!  */
+#define O32_ARGC        32
+/* Number of static registers we save.  */
+#define O32_STATC       11
+/* Frame size for static register  */
+#define O32_FRAMESZ     (SZREG * O32_STATC)
+/* Frame size on new stack */
+#define O32_FRAMESZ_NEW (SZREG + 4 * O32_ARGC)
+
+                .text
+
+/*
+ * O32 function call dispatcher, for interfacing 32-bit ROM routines.
+ *
+ * The standard 64 (N32) calling sequence is supported, with a0
+ * holding a function pointer, a1 a new stack pointer, a2-a7 -- its
+ * first six arguments and the stack -- remaining ones (up to O32_ARGC,
+ * including a2-a7). Static registers, gp and fp are preserved, v0 holds
+ * a result. This code relies on the called o32 function for sp and ra
+ * restoration and this dispatcher has to be placed in a KSEGx (or KUSEG)
+ * address space.  Any pointers passed have to point to addresses within
+ * one of these spaces as well.
+ */
+NESTED(call_o32, O32_FRAMESZ, ra)
+                REG_SUBU        sp,O32_FRAMESZ
+
+                REG_S           ra,O32_FRAMESZ-1*SZREG(sp)
+                REG_S           fp,O32_FRAMESZ-2*SZREG(sp)
+                REG_S           gp,O32_FRAMESZ-3*SZREG(sp)
+                REG_S           s7,O32_FRAMESZ-4*SZREG(sp)
+                REG_S           s6,O32_FRAMESZ-5*SZREG(sp)
+                REG_S           s5,O32_FRAMESZ-6*SZREG(sp)
+                REG_S           s4,O32_FRAMESZ-7*SZREG(sp)
+                REG_S           s3,O32_FRAMESZ-8*SZREG(sp)
+                REG_S           s2,O32_FRAMESZ-9*SZREG(sp)
+                REG_S           s1,O32_FRAMESZ-10*SZREG(sp)
+                REG_S           s0,O32_FRAMESZ-11*SZREG(sp)
+
+                move            jp,a0
+                REG_SUBU        s0,a1,O32_FRAMESZ_NEW
+                REG_S           sp,O32_FRAMESZ_NEW-1*SZREG(s0)
+
+                sll             a0,a2,zero
+                sll             a1,a3,zero
+                sll             a2,a4,zero
+                sll             a3,a5,zero
+                sw              a6,0x10(s0)
+                sw              a7,0x14(s0)
+
+                PTR_LA          t0,O32_FRAMESZ(sp)
+                PTR_LA          t1,0x18(s0)
+                li              t2,O32_ARGC-6
+1:
+                lw              t3,(t0)
+                REG_ADDU        t0,SZREG
+                sw              t3,(t1)
+                REG_SUBU        t2,1
+                REG_ADDU        t1,4
+                bnez            t2,1b
+
+                move            sp,s0
+
+                jalr            jp
+
+                REG_L           sp,O32_FRAMESZ_NEW-1*SZREG(sp)
+
+                REG_L           s0,O32_FRAMESZ-11*SZREG(sp)
+                REG_L           s1,O32_FRAMESZ-10*SZREG(sp)
+                REG_L           s2,O32_FRAMESZ-9*SZREG(sp)
+                REG_L           s3,O32_FRAMESZ-8*SZREG(sp)
+                REG_L           s4,O32_FRAMESZ-7*SZREG(sp)
+                REG_L           s5,O32_FRAMESZ-6*SZREG(sp)
+                REG_L           s6,O32_FRAMESZ-5*SZREG(sp)
+                REG_L           s7,O32_FRAMESZ-4*SZREG(sp)
+                REG_L           gp,O32_FRAMESZ-3*SZREG(sp)
+                REG_L           fp,O32_FRAMESZ-2*SZREG(sp)
+                REG_L           ra,O32_FRAMESZ-1*SZREG(sp)
+
+                REG_ADDU        sp,O32_FRAMESZ
+                jr              ra
+END(call_o32)
diff --git a/arch/mips/fw/sni/Makefile b/arch/mips/fw/sni/Makefile
new file mode 100644
index 000000000000..d9740a3788e2
--- /dev/null
+++ b/arch/mips/fw/sni/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the SNI prom monitor routines under Linux.
+#
+
+lib-$(CONFIG_SNIPROM)   += sniprom.o
diff --git a/arch/mips/fw/sni/sniprom.c b/arch/mips/fw/sni/sniprom.c
new file mode 100644
index 000000000000..96ba99202758
--- /dev/null
+++ b/arch/mips/fw/sni/sniprom.c
@@ -0,0 +1,151 @@
+/*
+ * Big Endian PROM code for SNI RM machines
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org)
+ * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/console.h>
+
+#include <asm/addrspace.h>
+#include <asm/sni.h>
+#include <asm/mipsprom.h>
+#include <asm/mipsregs.h>
+#include <asm/bootinfo.h>
+
+/* special SNI prom calls */
+/*
+ * This does not exist in all proms - SINIX compares
+ * the prom env variable "version" against "2.0008"
+ * or greater. If lesser it tries to probe interesting
+ * registers
+ */
+#define PROM_GET_MEMCONF        58
+#define PROM_GET_HWCONF         61
+
+#define PROM_VEC                (u64 *)CKSEG1ADDR(0x1fc00000)
+#define PROM_ENTRY(x)           (PROM_VEC + (x))
+
+#define ___prom_putchar         ((int *(*)(int))PROM_ENTRY(PROM_PUTCHAR))
+#define ___prom_getenv          ((char *(*)(char *))PROM_ENTRY(PROM_GETENV))
+#define ___prom_get_memconf     ((void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF))
+#define ___prom_get_hwconf      ((u32 (*)(void))PROM_ENTRY(PROM_GET_HWCONF))
+
+#ifdef CONFIG_64BIT
+
+static u8 o32_stk[16384];
+#define O32_STK   &o32_stk[sizeof(o32_stk)]
+
+#define __PROM_O32(fun, arg) fun arg __asm__(#fun); \
+                                     __asm__(#fun " = call_o32")
+
+int   __PROM_O32(__prom_putchar, (int *(*)(int), void *, int));
+char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *));
+void  __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *));
+u32   __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *));
+
+#define _prom_putchar(x)     __prom_putchar(___prom_putchar, O32_STK, x)
+#define _prom_getenv(x)      __prom_getenv(___prom_getenv, O32_STK, x)
+#define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x)
+#define _prom_get_hwconf()   __prom_get_hwconf(___prom_get_hwconf, O32_STK)
+
+#else
+#define _prom_putchar(x)     ___prom_putchar(x)
+#define _prom_getenv(x)      ___prom_getenv(x)
+#define _prom_get_memconf(x) ___prom_get_memconf(x)
+#define _prom_get_hwconf(x)  ___prom_get_hwconf(x)
+#endif
+
+void prom_putchar(char c)
+{
+        _prom_putchar(c);
+}
+
+
+char *prom_getenv(char *s)
+{
+        return _prom_getenv(s);
+}
+
+void *prom_get_hwconf(void)
+{
+        u32 hwconf = _prom_get_hwconf();
+
+        if (hwconf == 0xffffffff)
+                return NULL;
+
+        return (void *)CKSEG1ADDR(hwconf);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+/*
+ * /proc/cpuinfo system type
+ *
+ */
+char *system_type = "Unknown";
+const char *get_system_type(void)
+{
+        return system_type;
+}
+
+static void __init sni_mem_init(void)
+{
+        int i, memsize;
+        struct membank {
+                u32             size;
+                u32             base;
+                u32             size2;
+                u32             pad1;
+                u32             pad2;
+        } memconf[8];
+        int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
+
+
+        /* MemSIZE from prom in 16MByte chunks */
+        memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
+
+        pr_debug("IDProm memsize: %u MByte\n", memsize);
+
+        /* get memory bank layout from prom */
+        _prom_get_memconf(&memconf);
+
+        pr_debug("prom_get_mem_conf memory configuration:\n");
+        for (i = 0; i < 8 && memconf[i].size; i++) {
+                if (brd_type == SNI_BRD_PCI_TOWER ||
+                    brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
+                        if (memconf[i].base >= 0x20000000 &&
+                            memconf[i].base <  0x30000000)
+                                memconf[i].base -= 0x20000000;
+                }
+                pr_debug("Bank%d: %08x @ %08x\n", i,
+                        memconf[i].size, memconf[i].base);
+                add_memory_region(memconf[i].base, memconf[i].size,
+                                  BOOT_MEM_RAM);
+        }
+}
+
+void __init prom_init(void)
+{
+        int argc = fw_arg0;
+        u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1);
+        int i;
+
+        sni_mem_init();
+
+        /* copy prom cmdline parameters to kernel cmdline */
+        for (i = 1; i < argc; i++) {
+                strcat(arcs_cmdline, (char *)CKSEG0ADDR(argv[i]));
+                if (i < (argc - 1))
+                        strcat(arcs_cmdline, " ");
+        }
+}
diff --git a/arch/mips/gt64120/wrppmc/setup.c b/arch/mips/gt64120/wrppmc/setup.c
index 51f6b7862460..728ef6a80edd 100644
--- a/arch/mips/gt64120/wrppmc/setup.c
+++ b/arch/mips/gt64120/wrppmc/setup.c
@@ -121,8 +121,6 @@ const char *get_system_type(void)
  */
 void __init prom_init(void)
 {
-        mips_machtype = MACH_WRPPMC;
-
         add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
         add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
 
diff --git a/arch/mips/jazz/setup.c b/arch/mips/jazz/setup.c
index a7857973ca03..a7947199c99b 100644
--- a/arch/mips/jazz/setup.c
+++ b/arch/mips/jazz/setup.c
@@ -200,12 +200,19 @@ static struct platform_device jazz_cmos_pdev = {
         .resource       = jazz_cmos_rsrc
 };
 
+static struct platform_device pcspeaker_pdev = {
+        .name           = "pcspkr",
+        .id             = -1,
+};
+
 static int __init jazz_setup_devinit(void)
 {
         platform_device_register(&jazz_serial8250_device);
         platform_device_register(&jazz_esp_pdev);
         platform_device_register(&jazz_sonic_pdev);
         platform_device_register(&jazz_cmos_pdev);
+        platform_device_register(&pcspeaker_pdev);
+
         return 0;
 }
 
diff --git a/arch/mips/jmr3927/rbhma3100/init.c b/arch/mips/jmr3927/rbhma3100/init.c
index b643f75ec9a5..700b9cf8eb9d 100644
--- a/arch/mips/jmr3927/rbhma3100/init.c
+++ b/arch/mips/jmr3927/rbhma3100/init.c
@@ -52,10 +52,6 @@ void __init prom_init(void)
                 puts("Warning: TX3927 TLB off\n");
 #endif
 
-#ifdef CONFIG_TOSHIBA_JMR3927
-        mips_machtype = MACH_TOSHIBA_JMR3927;
-#endif
-
         prom_init_cmdline();
         add_memory_region(0, JMR3927_SDRAM_SIZE, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/jmr3927/rbhma3100/setup.c b/arch/mips/jmr3927/rbhma3100/setup.c
index 06e01c8f4e3a..c886d804d303 100644
--- a/arch/mips/jmr3927/rbhma3100/setup.c
+++ b/arch/mips/jmr3927/rbhma3100/setup.c
@@ -29,21 +29,17 @@
 
 #include <linux/init.h>
 #include <linux/kernel.h>
-#include <linux/kdev_t.h>
 #include <linux/types.h>
 #include <linux/pci.h>
-#include <linux/ide.h>
 #include <linux/ioport.h>
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 #ifdef CONFIG_SERIAL_TXX9
-#include <linux/tty.h>
-#include <linux/serial.h>
 #include <linux/serial_core.h>
 #endif
 
-#include <asm/addrspace.h>
 #include <asm/txx9tmr.h>
 #include <asm/reboot.h>
 #include <asm/jmr3927/jmr3927.h>
@@ -238,6 +234,8 @@ static void __init tx3927_setup(void)
         tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
         /* Disable PCI snoop */
         tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
+        /* do reset on watchdog */
+        tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;
 
 #ifdef DO_WRITE_THROUGH
         /* Enable PCI SNOOP - with write through only */
@@ -388,3 +386,55 @@ static int __init jmr3927_rtc_init(void)
         return IS_ERR(dev) ? PTR_ERR(dev) : 0;
 }
 device_initcall(jmr3927_rtc_init);
+
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+        struct resource res = {
+                .start  = base,
+                .end    = base + 0x100 - 1,
+                .flags  = IORESOURCE_MEM,
+        };
+        struct platform_device *dev =
+                platform_device_register_simple("txx9wdt", -1, &res, 1);
+        return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init jmr3927_wdt_init(void)
+{
+        return txx9_wdt_init(TX3927_TMR_REG(2));
+}
+device_initcall(jmr3927_wdt_init);
+
+/* Minimum CLK support */
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+        if (!strcmp(id, "imbus_clk"))
+                return (struct clk *)JMR3927_IMCLK;
+        return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+        return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+        return (unsigned long)clk;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
diff --git a/arch/mips/kernel/cpu-bugs64.c b/arch/mips/kernel/cpu-bugs64.c
index af78456d4138..417bb3e336ac 100644
--- a/arch/mips/kernel/cpu-bugs64.c
+++ b/arch/mips/kernel/cpu-bugs64.c
@@ -18,6 +18,15 @@
 #include <asm/mipsregs.h>
 #include <asm/system.h>
 
+static char bug64hit[] __initdata =
+        "reliable operation impossible!\n%s";
+static char nowar[] __initdata =
+        "Please report to <linux-mips@linux-mips.org>.";
+static char r4kwar[] __initdata =
+        "Enable CPU_R4000_WORKAROUNDS to rectify.";
+static char daddiwar[] __initdata =
+        "Enable CPU_DADDI_WORKAROUNDS to rectify.";
+
 static inline void align_mod(const int align, const int mod)
 {
         asm volatile(
@@ -155,13 +164,7 @@ static inline void check_mult_sh(void)
         }
 
         printk("no.\n");
-        panic("Reliable operation impossible!\n"
-#ifndef CONFIG_CPU_R4000
-              "Configure for R4000 to enable the workaround."
-#else
-              "Please report to <linux-mips@linux-mips.org>."
-#endif
-              );
+        panic(bug64hit, !R4000_WAR ? r4kwar : nowar);
 }
 
 static volatile int daddi_ov __initdata = 0;
@@ -233,15 +236,11 @@ static inline void check_daddi(void)
         }
 
         printk("no.\n");
-        panic("Reliable operation impossible!\n"
-#if !defined(CONFIG_CPU_R4000) && !defined(CONFIG_CPU_R4400)
-              "Configure for R4000 or R4400 to enable the workaround."
-#else
-              "Please report to <linux-mips@linux-mips.org>."
-#endif
-              );
+        panic(bug64hit, !DADDI_WAR ? daddiwar : nowar);
 }
 
+int daddiu_bug __initdata = -1;
+
 static inline void check_daddiu(void)
 {
         long v, w, tmp;
@@ -281,7 +280,9 @@ static inline void check_daddiu(void)
                 : "=&r" (v), "=&r" (w), "=&r" (tmp)
                 : "I" (0xffffffffffffdb9aUL), "I" (0x1234));
 
-        if (v == w) {
+        daddiu_bug = v != w;
+
+        if (!daddiu_bug) {
                 printk("no.\n");
                 return;
         }
@@ -303,18 +304,16 @@ static inline void check_daddiu(void)
         }
 
         printk("no.\n");
-        panic("Reliable operation impossible!\n"
-#if !defined(CONFIG_CPU_R4000) && !defined(CONFIG_CPU_R4400)
-              "Configure for R4000 or R4400 to enable the workaround."
-#else
-              "Please report to <linux-mips@linux-mips.org>."
-#endif
-              );
+        panic(bug64hit, !DADDI_WAR ? daddiwar : nowar);
 }
 
-void __init check_bugs64(void)
+void __init check_bugs64_early(void)
 {
         check_mult_sh();
-        check_daddi();
         check_daddiu();
 }
+
+void __init check_bugs64(void)
+{
+        check_daddi();
+}
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 5c2794391bf5..5861a432a52f 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -188,6 +188,8 @@ static inline void check_wait(void)
         case CPU_AU1500:
         case CPU_AU1550:
         case CPU_AU1200:
+        case CPU_AU1210:
+        case CPU_AU1250:
                 if (allow_au1k_wait)
                         cpu_wait = au1k_wait;
                 break;
@@ -733,6 +735,11 @@ static inline void cpu_probe_alchemy(struct cpuinfo_mips *c)
                         break;
                 case 4:
                         c->cputype = CPU_AU1200;
+                        if (2 == (c->processor_id & 0xff))
+                                c->cputype = CPU_AU1250;
+                        break;
+                case 5:
+                        c->cputype = CPU_AU1210;
                         break;
                 default:
                         panic("Unknown Au Core!");
@@ -858,6 +865,8 @@ static __init const char *cpu_to_name(struct cpuinfo_mips *c)
         case CPU_AU1100:        name = "Au1100"; break;
         case CPU_AU1550:        name = "Au1550"; break;
         case CPU_AU1200:        name = "Au1200"; break;
+        case CPU_AU1210:        name = "Au1210"; break;
+        case CPU_AU1250:        name = "Au1250"; break;
         case CPU_4KEC:          name = "MIPS 4KEc"; break;
         case CPU_4KSC:          name = "MIPS 4KSc"; break;
         case CPU_VR41XX:        name = "NEC Vr41xx"; break;
diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index e76a76bf0b3d..c6ada98ee042 100644
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -6,7 +6,7 @@
  * Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  * Copyright (C) 2001 MIPS Technologies, Inc.
- * Copyright (C) 2002 Maciej W. Rozycki
+ * Copyright (C) 2002, 2007  Maciej W. Rozycki
  */
 #include <linux/init.h>
 
@@ -471,7 +471,13 @@ NESTED(nmi_handler, PT_SIZE, sp)
         jr      k0
          rfe
 #else
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
         LONG_ADDIU      k0, 4           /* stall on $k0 */
+#else
+        .set    at=v1
+        LONG_ADDIU      k0, 4
+        .set    noat
+#endif
         MTC0    k0, CP0_EPC
         /* I hope three instructions between MTC0 and ERET are enough... */
         ori     k1, _THREAD_MASK
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c
index d2c2e00e5864..f6704ab16306 100644
--- a/arch/mips/kernel/kspd.c
+++ b/arch/mips/kernel/kspd.c
@@ -161,8 +161,7 @@ static unsigned int translate_open_flags(int flags)
         int i;
         unsigned int ret = 0;
 
-        for (i = 0; i < (sizeof(open_flags_table) / sizeof(struct apsp_table));
-             i++) {
+        for (i = 0; i < ARRAY_SIZE(open_flags_table); i++) {
                 if( (flags & open_flags_table[i].sp) ) {
                         ret |= open_flags_table[i].ap;
                 }
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 2b8ec1102e86..65af3cc90abb 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -174,36 +174,16 @@ struct rlimit32 {
         int     rlim_max;
 };
 
-#ifdef __MIPSEB__
-asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
-        int length_hi, int length_lo)
-#endif
-#ifdef __MIPSEL__
-asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
-        int length_lo, int length_hi)
-#endif
+asmlinkage long sys32_truncate64(const char __user * path,
+        unsigned long __dummy, int a2, int a3)
 {
-        loff_t length;
-
-        length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
-
-        return sys_truncate(path, length);
+        return sys_truncate(path, merge_64(a2, a3));
 }
 
-#ifdef __MIPSEB__
 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
-        int length_hi, int length_lo)
-#endif
-#ifdef __MIPSEL__
-asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
-        int length_lo, int length_hi)
-#endif
+        int a2, int a3)
 {
-        loff_t length;
-
-        length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
-
-        return sys_ftruncate(fd, length);
+        return sys_ftruncate(fd, merge_64(a2, a3));
 }
 
 static inline long
diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index 3d6b1ec1f328..640fb0cc6e39 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -17,7 +17,6 @@
 #include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/mmu_context.h>
-#include <asm/smp.h>
 #include <asm/mipsmtregs.h>
 #include <asm/r4kcache.h>
 #include <asm/cacheflush.h>
diff --git a/arch/mips/kernel/pcspeaker.c b/arch/mips/kernel/pcspeaker.c
deleted file mode 100644
index 475df6904219..000000000000
--- a/arch/mips/kernel/pcspeaker.c
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright (C) 2006 IBM Corporation
- *
- * Implements device information for i8253 timer chip
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation
- */
-
-#include <linux/platform_device.h>
-
-static __init int add_pcspkr(void)
-{
-        struct platform_device *pd;
-        int ret;
-
-        pd = platform_device_alloc("pcspkr", -1);
-        if (!pd)
-                return -ENOMEM;
-
-        ret = platform_device_add(pd);
-        if (ret)
-                platform_device_put(pd);
-
-        return ret;
-}
-device_initcall(add_pcspkr);
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 6e6e947cce1e..36f065398243 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -62,6 +62,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                 );
         seq_printf(m, "shadow register sets\t: %d\n",
                        cpu_data[n].srsets);
+        seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
 
         sprintf(fmt, "VCE%%c exceptions\t\t: %s\n",
                 cpu_has_vce ? "%u" : "not available");
@@ -89,7 +90,7 @@ static void c_stop(struct seq_file *m, void *v)
 {
 }
 
-struct seq_operations cpuinfo_op = {
+const struct seq_operations cpuinfo_op = {
         .start  = c_start,
         .next   = c_next,
         .stop   = c_stop,
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index 1ba00c15505b..0233798f7155 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -40,7 +40,6 @@
 #include <asm/atomic.h>
 #include <asm/cpu.h>
 #include <asm/processor.h>
-#include <asm/mips_mt.h>
 #include <asm/system.h>
 #include <asm/vpe.h>
 #include <asm/rtlx.h>
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index f8a535afce39..269c252d956f 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -8,7 +8,7 @@
  * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03  Ralf Baechle
  * Copyright (C) 1996 Stoned Elipot
  * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) 2000 2001, 2002  Maciej W. Rozycki
+ * Copyright (C) 2000, 2001, 2002, 2007  Maciej W. Rozycki
  */
 #include <linux/init.h>
 #include <linux/ioport.h>
@@ -24,10 +24,12 @@
 
 #include <asm/addrspace.h>
 #include <asm/bootinfo.h>
+#include <asm/bugs.h>
 #include <asm/cache.h>
 #include <asm/cpu.h>
 #include <asm/sections.h>
 #include <asm/setup.h>
+#include <asm/smp-ops.h>
 #include <asm/system.h>
 
 struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
@@ -561,6 +563,7 @@ void __init setup_arch(char **cmdline_p)
         }
 #endif
         cpu_report();
+        check_bugs_early();
 
 #if defined(CONFIG_VT)
 #if defined(CONFIG_VGA_CONSOLE)
@@ -573,9 +576,7 @@ void __init setup_arch(char **cmdline_p)
         arch_mem_init(cmdline_p);
 
         resource_init();
-#ifdef CONFIG_SMP
         plat_smp_setup();
-#endif
 }
 
 static int __init fpu_disable(char *s)
diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
index 94e210cc6cb6..89e6f6aa5166 100644
--- a/arch/mips/kernel/smp-mt.c
+++ b/arch/mips/kernel/smp-mt.c
@@ -22,6 +22,7 @@
 #include <linux/cpumask.h>
 #include <linux/interrupt.h>
 #include <linux/compiler.h>
+#include <linux/smp.h>
 
 #include <asm/atomic.h>
 #include <asm/cacheflush.h>
@@ -30,7 +31,6 @@
 #include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/mmu_context.h>
-#include <asm/smp.h>
 #include <asm/time.h>
 #include <asm/mipsregs.h>
 #include <asm/mipsmtregs.h>
@@ -215,68 +215,67 @@ static void __init smp_tc_init(unsigned int tc, unsigned int mvpconf0)
         write_tc_c0_tchalt(TCHALT_H);
 }
 
-/*
- * Common setup before any secondaries are started
- * Make sure all CPU's are in a sensible state before we boot any of the
- * secondarys
- */
-void __init plat_smp_setup(void)
+static void vsmp_send_ipi_single(int cpu, unsigned int action)
 {
-        unsigned int mvpconf0, ntc, tc, ncpu = 0;
-
-#ifdef CONFIG_MIPS_MT_FPAFF
-        /* If we have an FPU, enroll ourselves in the FPU-full mask */
-        if (cpu_has_fpu)
-                cpu_set(0, mt_fpu_cpumask);
-#endif /* CONFIG_MIPS_MT_FPAFF */
-        if (!cpu_has_mipsmt)
-                return;
-
-        /* disable MT so we can configure */
-        dvpe();
-        dmt();
+        int i;
+        unsigned long flags;
+        int vpflags;
 
-        /* Put MVPE's into 'configuration state' */
-        set_c0_mvpcontrol(MVPCONTROL_VPC);
+        local_irq_save(flags);
 
-        mvpconf0 = read_c0_mvpconf0();
-        ntc = (mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT;
+        vpflags = dvpe();       /* cant access the other CPU's registers whilst MVPE enabled */
 
-        /* we'll always have more TC's than VPE's, so loop setting everything
-           to a sensible state */
-        for (tc = 0; tc <= ntc; tc++) {
-                settc(tc);
+        switch (action) {
+        case SMP_CALL_FUNCTION:
+                i = C_SW1;
+                break;
 
-                smp_tc_init(tc, mvpconf0);
-                ncpu = smp_vpe_init(tc, mvpconf0, ncpu);
+        case SMP_RESCHEDULE_YOURSELF:
+        default:
+                i = C_SW0;
+                break;
         }
 
-        /* Release config state */
-        clear_c0_mvpcontrol(MVPCONTROL_VPC);
+        /* 1:1 mapping of vpe and tc... */
+        settc(cpu);
+        write_vpe_c0_cause(read_vpe_c0_cause() | i);
+        evpe(vpflags);
 
-        /* We'll wait until starting the secondaries before starting MVPE */
+        local_irq_restore(flags);
+}
 
-        printk(KERN_INFO "Detected %i available secondary CPU(s)\n", ncpu);
+static void vsmp_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+        unsigned int i;
+
+        for_each_cpu_mask(i, mask)
+                vsmp_send_ipi_single(i, action);
 }
 
-void __init plat_prepare_cpus(unsigned int max_cpus)
+static void __cpuinit vsmp_init_secondary(void)
 {
-        mips_mt_set_cpuoptions();
+        /* Enable per-cpu interrupts */
 
-        /* set up ipi interrupts */
-        if (cpu_has_vint) {
-                set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
-                set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
-        }
+        /* This is Malta specific: IPI,performance and timer inetrrupts */
+        write_c0_status((read_c0_status() & ~ST0_IM ) |
+                        (STATUSF_IP0 | STATUSF_IP1 | STATUSF_IP6 | STATUSF_IP7));
+}
 
-        cpu_ipi_resched_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ;
-        cpu_ipi_call_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ;
+static void __cpuinit vsmp_smp_finish(void)
+{
+        write_c0_compare(read_c0_count() + (8* mips_hpt_frequency/HZ));
 
-        setup_irq(cpu_ipi_resched_irq, &irq_resched);
-        setup_irq(cpu_ipi_call_irq, &irq_call);
+#ifdef CONFIG_MIPS_MT_FPAFF
+        /* If we have an FPU, enroll ourselves in the FPU-full mask */
+        if (cpu_has_fpu)
+                cpu_set(smp_processor_id(), mt_fpu_cpumask);
+#endif /* CONFIG_MIPS_MT_FPAFF */
 
-        set_irq_handler(cpu_ipi_resched_irq, handle_percpu_irq);
-        set_irq_handler(cpu_ipi_call_irq, handle_percpu_irq);
+        local_irq_enable();
+}
+
+static void vsmp_cpus_done(void)
+{
 }
 
 /*
@@ -287,7 +286,7 @@ void __init plat_prepare_cpus(unsigned int max_cpus)
  * (unsigned long)idle->thread_info the gp
  * assumes a 1:1 mapping of TC => VPE
  */
-void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
+static void __cpuinit vsmp_boot_secondary(int cpu, struct task_struct *idle)
 {
         struct thread_info *gp = task_thread_info(idle);
         dvpe();
@@ -321,57 +320,81 @@ void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
         evpe(EVPE_ENABLE);
 }
 
-void __cpuinit prom_init_secondary(void)
-{
-        /* Enable per-cpu interrupts */
-
-        /* This is Malta specific: IPI,performance and timer inetrrupts */
-        write_c0_status((read_c0_status() & ~ST0_IM ) |
-                        (STATUSF_IP0 | STATUSF_IP1 | STATUSF_IP6 | STATUSF_IP7));
-}
-
-void __cpuinit prom_smp_finish(void)
+/*
+ * Common setup before any secondaries are started
+ * Make sure all CPU's are in a sensible state before we boot any of the
+ * secondarys
+ */
+static void __init vsmp_smp_setup(void)
 {
-        write_c0_compare(read_c0_count() + (8* mips_hpt_frequency/HZ));
+        unsigned int mvpconf0, ntc, tc, ncpu = 0;
+        unsigned int nvpe;
 
 #ifdef CONFIG_MIPS_MT_FPAFF
         /* If we have an FPU, enroll ourselves in the FPU-full mask */
         if (cpu_has_fpu)
-                cpu_set(smp_processor_id(), mt_fpu_cpumask);
+                cpu_set(0, mt_fpu_cpumask);
 #endif /* CONFIG_MIPS_MT_FPAFF */
+        if (!cpu_has_mipsmt)
+                return;
 
-        local_irq_enable();
-}
+        /* disable MT so we can configure */
+        dvpe();
+        dmt();
 
-void prom_cpus_done(void)
-{
-}
+        /* Put MVPE's into 'configuration state' */
+        set_c0_mvpcontrol(MVPCONTROL_VPC);
 
-void core_send_ipi(int cpu, unsigned int action)
-{
-        int i;
-        unsigned long flags;
-        int vpflags;
+        mvpconf0 = read_c0_mvpconf0();
+        ntc = (mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT;
 
-        local_irq_save(flags);
+        nvpe = ((mvpconf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1;
+        smp_num_siblings = nvpe;
 
-        vpflags = dvpe();       /* cant access the other CPU's registers whilst MVPE enabled */
+        /* we'll always have more TC's than VPE's, so loop setting everything
+           to a sensible state */
+        for (tc = 0; tc <= ntc; tc++) {
+                settc(tc);
 
-        switch (action) {
-        case SMP_CALL_FUNCTION:
-                i = C_SW1;
-                break;
+                smp_tc_init(tc, mvpconf0);
+                ncpu = smp_vpe_init(tc, mvpconf0, ncpu);
+        }
 
-        case SMP_RESCHEDULE_YOURSELF:
-        default:
-                i = C_SW0;
-                break;
+        /* Release config state */
+        clear_c0_mvpcontrol(MVPCONTROL_VPC);
+
+        /* We'll wait until starting the secondaries before starting MVPE */
+
+        printk(KERN_INFO "Detected %i available secondary CPU(s)\n", ncpu);
+}
+
+static void __init vsmp_prepare_cpus(unsigned int max_cpus)
+{
+        mips_mt_set_cpuoptions();
+
+        /* set up ipi interrupts */
+        if (cpu_has_vint) {
+                set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
+                set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
         }
 
-        /* 1:1 mapping of vpe and tc... */
-        settc(cpu);
-        write_vpe_c0_cause(read_vpe_c0_cause() | i);
-        evpe(vpflags);
+        cpu_ipi_resched_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ;
+        cpu_ipi_call_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ;
 
-        local_irq_restore(flags);
+        setup_irq(cpu_ipi_resched_irq, &irq_resched);
+        setup_irq(cpu_ipi_call_irq, &irq_call);
+
+        set_irq_handler(cpu_ipi_resched_irq, handle_percpu_irq);
+        set_irq_handler(cpu_ipi_call_irq, handle_percpu_irq);
 }
+
+struct plat_smp_ops vsmp_smp_ops = {
+        .send_ipi_single        = vsmp_send_ipi_single,
+        .send_ipi_mask          = vsmp_send_ipi_mask,
+        .init_secondary         = vsmp_init_secondary,
+        .smp_finish             = vsmp_smp_finish,
+        .cpus_done              = vsmp_cpus_done,
+        .boot_secondary         = vsmp_boot_secondary,
+        .smp_setup              = vsmp_smp_setup,
+        .prepare_cpus           = vsmp_prepare_cpus,
+};
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 63989e9df4f9..1e5dfc28294a 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -37,7 +37,6 @@
 #include <asm/processor.h>
 #include <asm/system.h>
 #include <asm/mmu_context.h>
-#include <asm/smp.h>
 #include <asm/time.h>
 
 #ifdef CONFIG_MIPS_MT_SMTC
@@ -56,6 +55,44 @@ EXPORT_SYMBOL(cpu_online_map);
 extern void __init calibrate_delay(void);
 extern void cpu_idle(void);
 
+/* Number of TCs (or siblings in Intel speak) per CPU core */
+int smp_num_siblings = 1;
+EXPORT_SYMBOL(smp_num_siblings);
+
+/* representing the TCs (or siblings in Intel speak) of each logical CPU */
+cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly;
+EXPORT_SYMBOL(cpu_sibling_map);
+
+/* representing cpus for which sibling maps can be computed */
+static cpumask_t cpu_sibling_setup_map;
+
+static inline void set_cpu_sibling_map(int cpu)
+{
+        int i;
+
+        cpu_set(cpu, cpu_sibling_setup_map);
+
+        if (smp_num_siblings > 1) {
+                for_each_cpu_mask(i, cpu_sibling_setup_map) {
+                        if (cpu_data[cpu].core == cpu_data[i].core) {
+                                cpu_set(i, cpu_sibling_map[cpu]);
+                                cpu_set(cpu, cpu_sibling_map[i]);
+                        }
+                }
+        } else
+                cpu_set(cpu, cpu_sibling_map[cpu]);
+}
+
+struct plat_smp_ops *mp_ops;
+
+__cpuinit void register_smp_ops(struct plat_smp_ops *ops)
+{
+        if (ops)
+                printk(KERN_WARNING "Overriding previous set SMP ops\n");
+
+        mp_ops = ops;
+}
+
 /*
  * First C code run on the secondary CPUs after being started up by
  * the master.
@@ -72,7 +109,7 @@ asmlinkage __cpuinit void start_secondary(void)
         cpu_report();
         per_cpu_trap_init();
         mips_clockevent_init();
-        prom_init_secondary();
+        mp_ops->init_secondary();
 
         /*
          * XXX parity protection should be folded in here when it's converted
@@ -84,7 +121,8 @@ asmlinkage __cpuinit void start_secondary(void)
         cpu = smp_processor_id();
         cpu_data[cpu].udelay_val = loops_per_jiffy;
 
-        prom_smp_finish();
+        mp_ops->smp_finish();
+        set_cpu_sibling_map(cpu);
 
         cpu_set(cpu, cpu_callin_map);
 
@@ -155,7 +193,7 @@ int smp_call_function_mask(cpumask_t mask, void (*func) (void *info),
         smp_mb();
 
         /* Send a message to all other CPUs and wait for them to respond */
-        core_send_ipi_mask(mask, SMP_CALL_FUNCTION);
+        mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
 
         /* Wait for response */
         /* FIXME: lock-up detection, backtrace on lock-up */
@@ -249,7 +287,7 @@ void smp_send_stop(void)
 
 void __init smp_cpus_done(unsigned int max_cpus)
 {
-        prom_cpus_done();
+        mp_ops->cpus_done();
 }
 
 /* called from main before smp_init() */
@@ -257,7 +295,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 {
         init_new_context(current, &init_mm);
         current_thread_info()->cpu = 0;
-        plat_prepare_cpus(max_cpus);
+        mp_ops->prepare_cpus(max_cpus);
+        set_cpu_sibling_map(0);
 #ifndef CONFIG_HOTPLUG_CPU
         cpu_present_map = cpu_possible_map;
 #endif
@@ -295,7 +334,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
         if (IS_ERR(idle))
                 panic(KERN_ERR "Fork failed for CPU %d", cpu);
 
-        prom_boot_secondary(cpu, idle);
+        mp_ops->boot_secondary(cpu, idle);
 
         /*
          * Trust is futile.  We should really have timeouts ...
diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c
index 6f3709996172..fe256559c997 100644
--- a/arch/mips/kernel/smtc-proc.c
+++ b/arch/mips/kernel/smtc-proc.c
@@ -14,7 +14,6 @@
 #include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/mmu_context.h>
-#include <asm/smp.h>
 #include <asm/mipsregs.h>
 #include <asm/cacheflush.h>
 #include <linux/proc_fs.h>
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 9c92d42996cb..85f700e58131 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -16,7 +16,6 @@
 #include <asm/hazards.h>
 #include <asm/irq.h>
 #include <asm/mmu_context.h>
-#include <asm/smp.h>
 #include <asm/mipsregs.h>
 #include <asm/cacheflush.h>
 #include <asm/time.h>
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index 2995be1ab3ca..9f85d4cecc5b 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -50,8 +50,6 @@ int update_persistent_clock(struct timespec now)
         return rtc_mips_set_mmss(now.tv_sec);
 }
 
-int (*mips_timer_state)(void);
-
 int null_perf_irq(void)
 {
         return 0;
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 5fc2398bdb76..b5470ceb418b 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -114,11 +114,11 @@ SECTIONS
         __init_begin = .;
         .init.text : {
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
         .init.data : {
-                *(.init.data)
+                INIT_DATA
         }
         . = ALIGN(16);
         .init.setup : {
@@ -144,10 +144,10 @@ SECTIONS
          * references from .rodata
          */
         .exit.text : {
-                *(.exit.text)
+                EXIT_TEXT
         }
         .exit.data : {
-                *(.exit.data)
+                EXIT_DATA
         }
 #if defined(CONFIG_BLK_DEV_INITRD)
         . = ALIGN(_PAGE_SIZE);
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index c06eb812a95e..eed2dc4273e0 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -53,7 +53,6 @@
 #include <asm/system.h>
 #include <asm/vpe.h>
 #include <asm/kspd.h>
-#include <asm/mips_mt.h>
 
 typedef void *vpe_handle;
 
diff --git a/arch/mips/lasat/picvue.c b/arch/mips/lasat/picvue.c
index 6471d0663fd8..d3d04c392e25 100644
--- a/arch/mips/lasat/picvue.c
+++ b/arch/mips/lasat/picvue.c
@@ -22,8 +22,6 @@
 
 struct pvc_defs *picvue;
 
-DECLARE_MUTEX(pvc_sem);
-
 static void pvc_reg_write(u32 val)
 {
         *picvue->reg = val;
diff --git a/arch/mips/lasat/picvue.h b/arch/mips/lasat/picvue.h
index 2a96bf971897..91df55371127 100644
--- a/arch/mips/lasat/picvue.h
+++ b/arch/mips/lasat/picvue.h
@@ -4,8 +4,6 @@
  * Brian Murphy <brian.murphy@eicon.com>
  *
  */
-#include <asm/semaphore.h>
-
 struct pvc_defs {
         volatile u32 *reg;
         u32 data_shift;
@@ -45,4 +43,3 @@ void pvc_move(u8 cmd);
 void pvc_clear(void);
 void pvc_home(void);
 
-extern struct semaphore pvc_sem;
diff --git a/arch/mips/lasat/picvue_proc.c b/arch/mips/lasat/picvue_proc.c
index 9947c1525822..0bb6037afba3 100644
--- a/arch/mips/lasat/picvue_proc.c
+++ b/arch/mips/lasat/picvue_proc.c
@@ -13,9 +13,11 @@
 #include <linux/interrupt.h>
 
 #include <linux/timer.h>
+#include <linux/mutex.h>
 
 #include "picvue.h"
 
+static DEFINE_MUTEX(pvc_mutex);
 static char pvc_lines[PVC_NLINES][PVC_LINELEN+1];
 static int pvc_linedata[PVC_NLINES];
 static struct proc_dir_entry *pvc_display_dir;
@@ -48,9 +50,9 @@ static int pvc_proc_read_line(char *page, char **start,
                 return 0;
         }
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         page += sprintf(page, "%s\n", pvc_lines[lineno]);
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         return page - origpage;
 }
@@ -73,10 +75,10 @@ static int pvc_proc_write_line(struct file *file, const char *buffer,
         if (buffer[count-1] == '\n')
                 count--;
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         strncpy(pvc_lines[lineno], buffer, count);
         pvc_lines[lineno][count] = '\0';
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         tasklet_schedule(&pvc_display_tasklet);
 
@@ -89,7 +91,7 @@ static int pvc_proc_write_scroll(struct file *file, const char *buffer,
         int origcount = count;
         int cmd = simple_strtol(buffer, NULL, 10);
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         if (scroll_interval != 0)
                 del_timer(&timer);
 
@@ -106,7 +108,7 @@ static int pvc_proc_write_scroll(struct file *file, const char *buffer,
                 }
                 add_timer(&timer);
         }
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         return origcount;
 }
@@ -117,9 +119,9 @@ static int pvc_proc_read_scroll(char *page, char **start,
 {
         char *origpage = page;
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         page += sprintf(page, "%d\n", scroll_dir * scroll_interval);
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         return page - origpage;
 }
diff --git a/arch/mips/lemote/lm2e/pci.c b/arch/mips/lemote/lm2e/pci.c
index 1ade1cef3899..c1e41f15cc7e 100644
--- a/arch/mips/lemote/lm2e/pci.c
+++ b/arch/mips/lemote/lm2e/pci.c
@@ -81,9 +81,6 @@ static void __init ict_pcimap(void)
 
 static int __init pcibios_init(void)
 {
-        extern int pci_probe_only;
-        pci_probe_only = 0;
-
         ict_pcimap();
         register_pci_controller(&loongson2e_pci_controller);
 
diff --git a/arch/mips/lemote/lm2e/prom.c b/arch/mips/lemote/lm2e/prom.c
index 824336812198..7edc15dfed6c 100644
--- a/arch/mips/lemote/lm2e/prom.c
+++ b/arch/mips/lemote/lm2e/prom.c
@@ -57,8 +57,6 @@ void __init prom_init(void)
         arg = (int *)fw_arg1;
         env = (int *)fw_arg2;
 
-        mips_machtype = MACH_LEMOTE_FULONG;
-
         prom_init_cmdline();
 
         if ((strstr(arcs_cmdline, "console=")) == NULL)
diff --git a/arch/mips/lib/csum_partial.S b/arch/mips/lib/csum_partial.S
index c0a77fe038be..8d7784122c14 100644
--- a/arch/mips/lib/csum_partial.S
+++ b/arch/mips/lib/csum_partial.S
@@ -7,6 +7,7 @@
  *
  * Copyright (C) 1998, 1999 Ralf Baechle
  * Copyright (C) 1999 Silicon Graphics, Inc.
+ * Copyright (C) 2007  Maciej W. Rozycki
  */
 #include <linux/errno.h>
 #include <asm/asm.h>
@@ -52,9 +53,12 @@
 #define UNIT(unit)  ((unit)*NBYTES)
 
 #define ADDC(sum,reg)                                           \
+        .set    push;                                           \
+        .set    noat;                                           \
         ADD     sum, reg;                                       \
         sltu    v1, sum, reg;                                   \
-        ADD     sum, v1
+        ADD     sum, v1;                                        \
+        .set    pop
 
 #define CSUM_BIGCHUNK1(src, offset, sum, _t0, _t1, _t2, _t3)    \
         LOAD    _t0, (offset + UNIT(0))(src);                   \
@@ -92,13 +96,13 @@ LEAF(csum_partial)
         move    t7, zero
 
         sltiu   t8, a1, 0x8
-        bnez    t8, small_csumcpy               /* < 8 bytes to copy */
+        bnez    t8, .Lsmall_csumcpy             /* < 8 bytes to copy */
          move   t2, a1
 
         andi    t7, src, 0x1                    /* odd buffer? */
 
-hword_align:
-        beqz    t7, word_align
+.Lhword_align:
+        beqz    t7, .Lword_align
          andi   t8, src, 0x2
 
         lbu     t0, (src)
@@ -110,8 +114,8 @@ hword_align:
         PTR_ADDU        src, src, 0x1
         andi    t8, src, 0x2
 
-word_align:
-        beqz    t8, dword_align
+.Lword_align:
+        beqz    t8, .Ldword_align
          sltiu  t8, a1, 56
 
         lhu     t0, (src)
@@ -120,12 +124,12 @@ word_align:
         sltiu   t8, a1, 56
         PTR_ADDU        src, src, 0x2
 
-dword_align:
-        bnez    t8, do_end_words
+.Ldword_align:
+        bnez    t8, .Ldo_end_words
          move   t8, a1
 
         andi    t8, src, 0x4
-        beqz    t8, qword_align
+        beqz    t8, .Lqword_align
          andi   t8, src, 0x8
 
         lw      t0, 0x00(src)
@@ -134,8 +138,8 @@ dword_align:
         PTR_ADDU        src, src, 0x4
         andi    t8, src, 0x8
 
-qword_align:
-        beqz    t8, oword_align
+.Lqword_align:
+        beqz    t8, .Loword_align
          andi   t8, src, 0x10
 
 #ifdef USE_DOUBLE
@@ -152,8 +156,8 @@ qword_align:
         PTR_ADDU        src, src, 0x8
         andi    t8, src, 0x10
 
-oword_align:
-        beqz    t8, begin_movement
+.Loword_align:
+        beqz    t8, .Lbegin_movement
          LONG_SRL       t8, a1, 0x7
 
 #ifdef USE_DOUBLE
@@ -168,51 +172,55 @@ oword_align:
         PTR_ADDU        src, src, 0x10
         LONG_SRL        t8, a1, 0x7
 
-begin_movement:
+.Lbegin_movement:
         beqz    t8, 1f
          andi   t2, a1, 0x40
 
-move_128bytes:
+.Lmove_128bytes:
         CSUM_BIGCHUNK(src, 0x00, sum, t0, t1, t3, t4)
         CSUM_BIGCHUNK(src, 0x20, sum, t0, t1, t3, t4)
         CSUM_BIGCHUNK(src, 0x40, sum, t0, t1, t3, t4)
         CSUM_BIGCHUNK(src, 0x60, sum, t0, t1, t3, t4)
         LONG_SUBU       t8, t8, 0x01
-        bnez    t8, move_128bytes
-         PTR_ADDU       src, src, 0x80
+        .set    reorder                         /* DADDI_WAR */
+        PTR_ADDU        src, src, 0x80
+        bnez    t8, .Lmove_128bytes
+        .set    noreorder
 
 1:
         beqz    t2, 1f
          andi   t2, a1, 0x20
 
-move_64bytes:
+.Lmove_64bytes:
         CSUM_BIGCHUNK(src, 0x00, sum, t0, t1, t3, t4)
         CSUM_BIGCHUNK(src, 0x20, sum, t0, t1, t3, t4)
         PTR_ADDU        src, src, 0x40
 
 1:
-        beqz    t2, do_end_words
+        beqz    t2, .Ldo_end_words
          andi   t8, a1, 0x1c
 
-move_32bytes:
+.Lmove_32bytes:
         CSUM_BIGCHUNK(src, 0x00, sum, t0, t1, t3, t4)
         andi    t8, a1, 0x1c
         PTR_ADDU        src, src, 0x20
 
-do_end_words:
-        beqz    t8, small_csumcpy
+.Ldo_end_words:
+        beqz    t8, .Lsmall_csumcpy
          andi   t2, a1, 0x3
         LONG_SRL        t8, t8, 0x2
 
-end_words:
+.Lend_words:
         lw      t0, (src)
         LONG_SUBU       t8, t8, 0x1
         ADDC(sum, t0)
-        bnez    t8, end_words
-         PTR_ADDU       src, src, 0x4
+        .set    reorder                         /* DADDI_WAR */
+        PTR_ADDU        src, src, 0x4
+        bnez    t8, .Lend_words
+        .set    noreorder
 
 /* unknown src alignment and < 8 bytes to go  */
-small_csumcpy:
+.Lsmall_csumcpy:
         move    a1, t2
 
         andi    t0, a1, 4
@@ -246,6 +254,8 @@ small_csumcpy:
 1:      ADDC(sum, t1)
 
         /* fold checksum */
+        .set    push
+        .set    noat
 #ifdef USE_DOUBLE
         dsll32  v1, sum, 0
         daddu   sum, v1
@@ -266,6 +276,7 @@ small_csumcpy:
         srl     sum, sum, 8
         or      sum, v1
         andi    sum, 0xffff
+        .set    pop
 1:
         .set    reorder
         /* Add the passed partial csum.  */
@@ -373,7 +384,11 @@ small_csumcpy:
 
 #define ADDRMASK (NBYTES-1)
 
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
         .set    noat
+#else
+        .set    at=v1
+#endif
 
 LEAF(__csum_partial_copy_user)
         PTR_ADDU        AT, src, len    /* See (1) above. */
@@ -398,95 +413,101 @@ FEXPORT(csum_partial_copy_nocheck)
          */
         sltu    t2, len, NBYTES
         and     t1, dst, ADDRMASK
-        bnez    t2, copy_bytes_checklen
+        bnez    t2, .Lcopy_bytes_checklen
          and    t0, src, ADDRMASK
         andi    odd, dst, 0x1                   /* odd buffer? */
-        bnez    t1, dst_unaligned
+        bnez    t1, .Ldst_unaligned
          nop
-        bnez    t0, src_unaligned_dst_aligned
+        bnez    t0, .Lsrc_unaligned_dst_aligned
         /*
          * use delay slot for fall-through
          * src and dst are aligned; need to compute rem
          */
-both_aligned:
+.Lboth_aligned:
          SRL    t0, len, LOG_NBYTES+3    # +3 for 8 units/iter
-        beqz    t0, cleanup_both_aligned # len < 8*NBYTES
+        beqz    t0, .Lcleanup_both_aligned # len < 8*NBYTES
          nop
         SUB     len, 8*NBYTES           # subtract here for bgez loop
         .align  4
 1:
-EXC(    LOAD    t0, UNIT(0)(src),       l_exc)
-EXC(    LOAD    t1, UNIT(1)(src),       l_exc_copy)
-EXC(    LOAD    t2, UNIT(2)(src),       l_exc_copy)
-EXC(    LOAD    t3, UNIT(3)(src),       l_exc_copy)
-EXC(    LOAD    t4, UNIT(4)(src),       l_exc_copy)
-EXC(    LOAD    t5, UNIT(5)(src),       l_exc_copy)
-EXC(    LOAD    t6, UNIT(6)(src),       l_exc_copy)
-EXC(    LOAD    t7, UNIT(7)(src),       l_exc_copy)
+EXC(    LOAD    t0, UNIT(0)(src),       .Ll_exc)
+EXC(    LOAD    t1, UNIT(1)(src),       .Ll_exc_copy)
+EXC(    LOAD    t2, UNIT(2)(src),       .Ll_exc_copy)
+EXC(    LOAD    t3, UNIT(3)(src),       .Ll_exc_copy)
+EXC(    LOAD    t4, UNIT(4)(src),       .Ll_exc_copy)
+EXC(    LOAD    t5, UNIT(5)(src),       .Ll_exc_copy)
+EXC(    LOAD    t6, UNIT(6)(src),       .Ll_exc_copy)
+EXC(    LOAD    t7, UNIT(7)(src),       .Ll_exc_copy)
         SUB     len, len, 8*NBYTES
         ADD     src, src, 8*NBYTES
-EXC(    STORE   t0, UNIT(0)(dst),       s_exc)
+EXC(    STORE   t0, UNIT(0)(dst),       .Ls_exc)
         ADDC(sum, t0)
-EXC(    STORE   t1, UNIT(1)(dst),       s_exc)
+EXC(    STORE   t1, UNIT(1)(dst),       .Ls_exc)
         ADDC(sum, t1)
-EXC(    STORE   t2, UNIT(2)(dst),       s_exc)
+EXC(    STORE   t2, UNIT(2)(dst),       .Ls_exc)
         ADDC(sum, t2)
-EXC(    STORE   t3, UNIT(3)(dst),       s_exc)
+EXC(    STORE   t3, UNIT(3)(dst),       .Ls_exc)
         ADDC(sum, t3)
-EXC(    STORE   t4, UNIT(4)(dst),       s_exc)
+EXC(    STORE   t4, UNIT(4)(dst),       .Ls_exc)
         ADDC(sum, t4)
-EXC(    STORE   t5, UNIT(5)(dst),       s_exc)
+EXC(    STORE   t5, UNIT(5)(dst),       .Ls_exc)
         ADDC(sum, t5)
-EXC(    STORE   t6, UNIT(6)(dst),       s_exc)
+EXC(    STORE   t6, UNIT(6)(dst),       .Ls_exc)
         ADDC(sum, t6)
-EXC(    STORE   t7, UNIT(7)(dst),       s_exc)
+EXC(    STORE   t7, UNIT(7)(dst),       .Ls_exc)
         ADDC(sum, t7)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 8*NBYTES
         bgez    len, 1b
-         ADD    dst, dst, 8*NBYTES
+        .set    noreorder
         ADD     len, 8*NBYTES           # revert len (see above)
 
         /*
          * len == the number of bytes left to copy < 8*NBYTES
          */
-cleanup_both_aligned:
+.Lcleanup_both_aligned:
 #define rem t7
-        beqz    len, done
+        beqz    len, .Ldone
          sltu   t0, len, 4*NBYTES
-        bnez    t0, less_than_4units
+        bnez    t0, .Lless_than_4units
          and    rem, len, (NBYTES-1)    # rem = len % NBYTES
         /*
          * len >= 4*NBYTES
          */
-EXC(    LOAD    t0, UNIT(0)(src),       l_exc)
-EXC(    LOAD    t1, UNIT(1)(src),       l_exc_copy)
-EXC(    LOAD    t2, UNIT(2)(src),       l_exc_copy)
-EXC(    LOAD    t3, UNIT(3)(src),       l_exc_copy)
+EXC(    LOAD    t0, UNIT(0)(src),       .Ll_exc)
+EXC(    LOAD    t1, UNIT(1)(src),       .Ll_exc_copy)
+EXC(    LOAD    t2, UNIT(2)(src),       .Ll_exc_copy)
+EXC(    LOAD    t3, UNIT(3)(src),       .Ll_exc_copy)
         SUB     len, len, 4*NBYTES
         ADD     src, src, 4*NBYTES
-EXC(    STORE   t0, UNIT(0)(dst),       s_exc)
+EXC(    STORE   t0, UNIT(0)(dst),       .Ls_exc)
         ADDC(sum, t0)
-EXC(    STORE   t1, UNIT(1)(dst),       s_exc)
+EXC(    STORE   t1, UNIT(1)(dst),       .Ls_exc)
         ADDC(sum, t1)
-EXC(    STORE   t2, UNIT(2)(dst),       s_exc)
+EXC(    STORE   t2, UNIT(2)(dst),       .Ls_exc)
         ADDC(sum, t2)
-EXC(    STORE   t3, UNIT(3)(dst),       s_exc)
+EXC(    STORE   t3, UNIT(3)(dst),       .Ls_exc)
         ADDC(sum, t3)
-        beqz    len, done
-         ADD    dst, dst, 4*NBYTES
-less_than_4units:
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 4*NBYTES
+        beqz    len, .Ldone
+        .set    noreorder
+.Lless_than_4units:
         /*
          * rem = len % NBYTES
          */
-        beq     rem, len, copy_bytes
+        beq     rem, len, .Lcopy_bytes
          nop
 1:
-EXC(    LOAD    t0, 0(src),             l_exc)
+EXC(    LOAD    t0, 0(src),             .Ll_exc)
         ADD     src, src, NBYTES
         SUB     len, len, NBYTES
-EXC(    STORE   t0, 0(dst),             s_exc)
+EXC(    STORE   t0, 0(dst),             .Ls_exc)
         ADDC(sum, t0)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, NBYTES
         bne     rem, len, 1b
-         ADD    dst, dst, NBYTES
+        .set    noreorder
 
         /*
          * src and dst are aligned, need to copy rem bytes (rem < NBYTES)
@@ -500,20 +521,20 @@ EXC(	STORE	t0, 0(dst),		s_exc)
          * more instruction-level parallelism.
          */
 #define bits t2
-        beqz    len, done
+        beqz    len, .Ldone
          ADD    t1, dst, len    # t1 is just past last byte of dst
         li      bits, 8*NBYTES
         SLL     rem, len, 3     # rem = number of bits to keep
-EXC(    LOAD    t0, 0(src),             l_exc)
+EXC(    LOAD    t0, 0(src),             .Ll_exc)
         SUB     bits, bits, rem # bits = number of bits to discard
         SHIFT_DISCARD t0, t0, bits
-EXC(    STREST  t0, -1(t1),             s_exc)
+EXC(    STREST  t0, -1(t1),             .Ls_exc)
         SHIFT_DISCARD_REVERT t0, t0, bits
         .set reorder
         ADDC(sum, t0)
-        b       done
+        b       .Ldone
         .set noreorder
-dst_unaligned:
+.Ldst_unaligned:
         /*
          * dst is unaligned
          * t0 = src & ADDRMASK
@@ -524,25 +545,25 @@ dst_unaligned:
          * Set match = (src and dst have same alignment)
          */
 #define match rem
-EXC(    LDFIRST t3, FIRST(0)(src),      l_exc)
+EXC(    LDFIRST t3, FIRST(0)(src),      .Ll_exc)
         ADD     t2, zero, NBYTES
-EXC(    LDREST  t3, REST(0)(src),       l_exc_copy)
+EXC(    LDREST  t3, REST(0)(src),       .Ll_exc_copy)
         SUB     t2, t2, t1      # t2 = number of bytes copied
         xor     match, t0, t1
-EXC(    STFIRST t3, FIRST(0)(dst),      s_exc)
+EXC(    STFIRST t3, FIRST(0)(dst),      .Ls_exc)
         SLL     t4, t1, 3               # t4 = number of bits to discard
         SHIFT_DISCARD t3, t3, t4
         /* no SHIFT_DISCARD_REVERT to handle odd buffer properly */
         ADDC(sum, t3)
-        beq     len, t2, done
+        beq     len, t2, .Ldone
          SUB    len, len, t2
         ADD     dst, dst, t2
-        beqz    match, both_aligned
+        beqz    match, .Lboth_aligned
          ADD    src, src, t2
 
-src_unaligned_dst_aligned:
+.Lsrc_unaligned_dst_aligned:
         SRL     t0, len, LOG_NBYTES+2    # +2 for 4 units/iter
-        beqz    t0, cleanup_src_unaligned
+        beqz    t0, .Lcleanup_src_unaligned
          and    rem, len, (4*NBYTES-1)   # rem = len % 4*NBYTES
 1:
 /*
@@ -551,49 +572,53 @@ src_unaligned_dst_aligned:
  * It's OK to load FIRST(N+1) before REST(N) because the two addresses
  * are to the same unit (unless src is aligned, but it's not).
  */
-EXC(    LDFIRST t0, FIRST(0)(src),      l_exc)
-EXC(    LDFIRST t1, FIRST(1)(src),      l_exc_copy)
+EXC(    LDFIRST t0, FIRST(0)(src),      .Ll_exc)
+EXC(    LDFIRST t1, FIRST(1)(src),      .Ll_exc_copy)
         SUB     len, len, 4*NBYTES
-EXC(    LDREST  t0, REST(0)(src),       l_exc_copy)
-EXC(    LDREST  t1, REST(1)(src),       l_exc_copy)
-EXC(    LDFIRST t2, FIRST(2)(src),      l_exc_copy)
-EXC(    LDFIRST t3, FIRST(3)(src),      l_exc_copy)
-EXC(    LDREST  t2, REST(2)(src),       l_exc_copy)
-EXC(    LDREST  t3, REST(3)(src),       l_exc_copy)
+EXC(    LDREST  t0, REST(0)(src),       .Ll_exc_copy)
+EXC(    LDREST  t1, REST(1)(src),       .Ll_exc_copy)
+EXC(    LDFIRST t2, FIRST(2)(src),      .Ll_exc_copy)
+EXC(    LDFIRST t3, FIRST(3)(src),      .Ll_exc_copy)
+EXC(    LDREST  t2, REST(2)(src),       .Ll_exc_copy)
+EXC(    LDREST  t3, REST(3)(src),       .Ll_exc_copy)
         ADD     src, src, 4*NBYTES
 #ifdef CONFIG_CPU_SB1
         nop                             # improves slotting
 #endif
-EXC(    STORE   t0, UNIT(0)(dst),       s_exc)
+EXC(    STORE   t0, UNIT(0)(dst),       .Ls_exc)
         ADDC(sum, t0)
-EXC(    STORE   t1, UNIT(1)(dst),       s_exc)
+EXC(    STORE   t1, UNIT(1)(dst),       .Ls_exc)
         ADDC(sum, t1)
-EXC(    STORE   t2, UNIT(2)(dst),       s_exc)
+EXC(    STORE   t2, UNIT(2)(dst),       .Ls_exc)
         ADDC(sum, t2)
-EXC(    STORE   t3, UNIT(3)(dst),       s_exc)
+EXC(    STORE   t3, UNIT(3)(dst),       .Ls_exc)
         ADDC(sum, t3)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 4*NBYTES
         bne     len, rem, 1b
-         ADD    dst, dst, 4*NBYTES
+        .set    noreorder
 
-cleanup_src_unaligned:
-        beqz    len, done
+.Lcleanup_src_unaligned:
+        beqz    len, .Ldone
          and    rem, len, NBYTES-1  # rem = len % NBYTES
-        beq     rem, len, copy_bytes
+        beq     rem, len, .Lcopy_bytes
          nop
 1:
-EXC(    LDFIRST t0, FIRST(0)(src),      l_exc)
-EXC(    LDREST  t0, REST(0)(src),       l_exc_copy)
+EXC(    LDFIRST t0, FIRST(0)(src),      .Ll_exc)
+EXC(    LDREST  t0, REST(0)(src),       .Ll_exc_copy)
         ADD     src, src, NBYTES
         SUB     len, len, NBYTES
-EXC(    STORE   t0, 0(dst),             s_exc)
+EXC(    STORE   t0, 0(dst),             .Ls_exc)
         ADDC(sum, t0)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, NBYTES
         bne     len, rem, 1b
-         ADD    dst, dst, NBYTES
+        .set    noreorder
 
-copy_bytes_checklen:
-        beqz    len, done
+.Lcopy_bytes_checklen:
+        beqz    len, .Ldone
          nop
-copy_bytes:
+.Lcopy_bytes:
         /* 0 < len < NBYTES  */
 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 #define SHIFT_START 0
@@ -604,14 +629,14 @@ copy_bytes:
 #endif
         move    t2, zero        # partial word
         li      t3, SHIFT_START # shift
-/* use l_exc_copy here to return correct sum on fault */
+/* use .Ll_exc_copy here to return correct sum on fault */
 #define COPY_BYTE(N)                    \
-EXC(    lbu     t0, N(src), l_exc_copy);        \
+EXC(    lbu     t0, N(src), .Ll_exc_copy);      \
         SUB     len, len, 1;            \
-EXC(    sb      t0, N(dst), s_exc);     \
+EXC(    sb      t0, N(dst), .Ls_exc);   \
         SLLV    t0, t0, t3;             \
         addu    t3, SHIFT_INC;          \
-        beqz    len, copy_bytes_done;   \
+        beqz    len, .Lcopy_bytes_done; \
          or     t2, t0
 
         COPY_BYTE(0)
@@ -622,15 +647,17 @@ EXC(	sb	t0, N(dst), s_exc);	\
         COPY_BYTE(4)
         COPY_BYTE(5)
 #endif
-EXC(    lbu     t0, NBYTES-2(src), l_exc_copy)
+EXC(    lbu     t0, NBYTES-2(src), .Ll_exc_copy)
         SUB     len, len, 1
-EXC(    sb      t0, NBYTES-2(dst), s_exc)
+EXC(    sb      t0, NBYTES-2(dst), .Ls_exc)
         SLLV    t0, t0, t3
         or      t2, t0
-copy_bytes_done:
+.Lcopy_bytes_done:
         ADDC(sum, t2)
-done:
+.Ldone:
         /* fold checksum */
+        .set    push
+        .set    noat
 #ifdef USE_DOUBLE
         dsll32  v1, sum, 0
         daddu   sum, v1
@@ -651,13 +678,14 @@ done:
         srl     sum, sum, 8
         or      sum, v1
         andi    sum, 0xffff
+        .set    pop
 1:
         .set reorder
         ADDC(sum, psum)
         jr      ra
         .set noreorder
 
-l_exc_copy:
+.Ll_exc_copy:
         /*
          * Copy bytes from src until faulting load address (or until a
          * lb faults)
@@ -672,15 +700,17 @@ l_exc_copy:
          li     t2, SHIFT_START
         LOAD    t0, THREAD_BUADDR(t0)
 1:
-EXC(    lbu     t1, 0(src),     l_exc)
+EXC(    lbu     t1, 0(src),     .Ll_exc)
         ADD     src, src, 1
         sb      t1, 0(dst)      # can't fault -- we're copy_from_user
         SLLV    t1, t1, t2
         addu    t2, SHIFT_INC
         ADDC(sum, t1)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 1
         bne     src, t0, 1b
-         ADD    dst, dst, 1
-l_exc:
+        .set    noreorder
+.Ll_exc:
         LOAD    t0, TI_TASK($28)
          nop
         LOAD    t0, THREAD_BUADDR(t0)   # t0 is just past last good address
@@ -697,19 +727,30 @@ l_exc:
          * Clear len bytes starting at dst.  Can't call __bzero because it
          * might modify len.  An inefficient loop for these rare times...
          */
-        beqz    len, done
-         SUB    src, len, 1
+        .set    reorder                         /* DADDI_WAR */
+        SUB     src, len, 1
+        beqz    len, .Ldone
+        .set    noreorder
 1:      sb      zero, 0(dst)
         ADD     dst, dst, 1
+        .set    push
+        .set    noat
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
         bnez    src, 1b
          SUB    src, src, 1
+#else
+        li      v1, 1
+        bnez    src, 1b
+         SUB    src, src, v1
+#endif
         li      v1, -EFAULT
-        b       done
+        b       .Ldone
          sw     v1, (errptr)
 
-s_exc:
+.Ls_exc:
         li      v0, -1 /* invalid checksum */
         li      v1, -EFAULT
         jr      ra
          sw     v1, (errptr)
+        .set    pop
         END(__csum_partial_copy_user)
diff --git a/arch/mips/lib/memcpy-inatomic.S b/arch/mips/lib/memcpy-inatomic.S
index 3a534b2baa0f..736d0fb56a94 100644
--- a/arch/mips/lib/memcpy-inatomic.S
+++ b/arch/mips/lib/memcpy-inatomic.S
@@ -9,6 +9,7 @@
  * Copyright (C) 1999, 2000, 01, 2002 Silicon Graphics, Inc.
  * Copyright (C) 2002 Broadcom, Inc.
  *   memcpy/copy_user author: Mark Vandevoorde
+ * Copyright (C) 2007  Maciej W. Rozycki
  *
  * Mnemonic names for arguments to memcpy/__copy_user
  */
@@ -175,7 +176,11 @@
 
         .text
         .set    noreorder
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
         .set    noat
+#else
+        .set    at=v1
+#endif
 
 /*
  * A combined memcpy/__copy_user
@@ -204,36 +209,36 @@ LEAF(__copy_user_inatomic)
         and     t1, dst, ADDRMASK
         PREF(   0, 1*32(src) )
         PREF(   1, 1*32(dst) )
-        bnez    t2, copy_bytes_checklen
+        bnez    t2, .Lcopy_bytes_checklen
          and    t0, src, ADDRMASK
         PREF(   0, 2*32(src) )
         PREF(   1, 2*32(dst) )
-        bnez    t1, dst_unaligned
+        bnez    t1, .Ldst_unaligned
          nop
-        bnez    t0, src_unaligned_dst_aligned
+        bnez    t0, .Lsrc_unaligned_dst_aligned
         /*
          * use delay slot for fall-through
          * src and dst are aligned; need to compute rem
          */
-both_aligned:
-         SRL    t0, len, LOG_NBYTES+3    # +3 for 8 units/iter
-        beqz    t0, cleanup_both_aligned # len < 8*NBYTES
-         and    rem, len, (8*NBYTES-1)   # rem = len % (8*NBYTES)
+.Lboth_aligned:
+         SRL    t0, len, LOG_NBYTES+3           # +3 for 8 units/iter
+        beqz    t0, .Lcleanup_both_aligned      # len < 8*NBYTES
+         and    rem, len, (8*NBYTES-1)          # rem = len % (8*NBYTES)
         PREF(   0, 3*32(src) )
         PREF(   1, 3*32(dst) )
         .align  4
 1:
-EXC(    LOAD    t0, UNIT(0)(src),       l_exc)
-EXC(    LOAD    t1, UNIT(1)(src),       l_exc_copy)
-EXC(    LOAD    t2, UNIT(2)(src),       l_exc_copy)
-EXC(    LOAD    t3, UNIT(3)(src),       l_exc_copy)
+EXC(    LOAD    t0, UNIT(0)(src),       .Ll_exc)
+EXC(    LOAD    t1, UNIT(1)(src),       .Ll_exc_copy)
+EXC(    LOAD    t2, UNIT(2)(src),       .Ll_exc_copy)
+EXC(    LOAD    t3, UNIT(3)(src),       .Ll_exc_copy)
         SUB     len, len, 8*NBYTES
-EXC(    LOAD    t4, UNIT(4)(src),       l_exc_copy)
-EXC(    LOAD    t7, UNIT(5)(src),       l_exc_copy)
+EXC(    LOAD    t4, UNIT(4)(src),       .Ll_exc_copy)
+EXC(    LOAD    t7, UNIT(5)(src),       .Ll_exc_copy)
         STORE   t0, UNIT(0)(dst)
         STORE   t1, UNIT(1)(dst)
-EXC(    LOAD    t0, UNIT(6)(src),       l_exc_copy)
-EXC(    LOAD    t1, UNIT(7)(src),       l_exc_copy)
+EXC(    LOAD    t0, UNIT(6)(src),       .Ll_exc_copy)
+EXC(    LOAD    t1, UNIT(7)(src),       .Ll_exc_copy)
         ADD     src, src, 8*NBYTES
         ADD     dst, dst, 8*NBYTES
         STORE   t2, UNIT(-6)(dst)
@@ -250,39 +255,43 @@ EXC(	LOAD	t1, UNIT(7)(src),	l_exc_copy)
         /*
          * len == rem == the number of bytes left to copy < 8*NBYTES
          */
-cleanup_both_aligned:
-        beqz    len, done
+.Lcleanup_both_aligned:
+        beqz    len, .Ldone
          sltu   t0, len, 4*NBYTES
-        bnez    t0, less_than_4units
+        bnez    t0, .Lless_than_4units
          and    rem, len, (NBYTES-1)    # rem = len % NBYTES
         /*
          * len >= 4*NBYTES
          */
-EXC(    LOAD    t0, UNIT(0)(src),       l_exc)
-EXC(    LOAD    t1, UNIT(1)(src),       l_exc_copy)
-EXC(    LOAD    t2, UNIT(2)(src),       l_exc_copy)
-EXC(    LOAD    t3, UNIT(3)(src),       l_exc_copy)
+EXC(    LOAD    t0, UNIT(0)(src),       .Ll_exc)
+EXC(    LOAD    t1, UNIT(1)(src),       .Ll_exc_copy)
+EXC(    LOAD    t2, UNIT(2)(src),       .Ll_exc_copy)
+EXC(    LOAD    t3, UNIT(3)(src),       .Ll_exc_copy)
         SUB     len, len, 4*NBYTES
         ADD     src, src, 4*NBYTES
         STORE   t0, UNIT(0)(dst)
         STORE   t1, UNIT(1)(dst)
         STORE   t2, UNIT(2)(dst)
         STORE   t3, UNIT(3)(dst)
-        beqz    len, done
-         ADD    dst, dst, 4*NBYTES
-less_than_4units:
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 4*NBYTES
+        beqz    len, .Ldone
+        .set    noreorder
+.Lless_than_4units:
         /*
          * rem = len % NBYTES
          */
-        beq     rem, len, copy_bytes
+        beq     rem, len, .Lcopy_bytes
          nop
 1:
-EXC(    LOAD    t0, 0(src),             l_exc)
+EXC(    LOAD    t0, 0(src),             .Ll_exc)
         ADD     src, src, NBYTES
         SUB     len, len, NBYTES
         STORE   t0, 0(dst)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, NBYTES
         bne     rem, len, 1b
-         ADD    dst, dst, NBYTES
+        .set    noreorder
 
         /*
          * src and dst are aligned, need to copy rem bytes (rem < NBYTES)
@@ -296,17 +305,17 @@ EXC(	LOAD	t0, 0(src),		l_exc)
          * more instruction-level parallelism.
          */
 #define bits t2
-        beqz    len, done
+        beqz    len, .Ldone
          ADD    t1, dst, len    # t1 is just past last byte of dst
         li      bits, 8*NBYTES
         SLL     rem, len, 3     # rem = number of bits to keep
-EXC(    LOAD    t0, 0(src),             l_exc)
+EXC(    LOAD    t0, 0(src),             .Ll_exc)
         SUB     bits, bits, rem # bits = number of bits to discard
         SHIFT_DISCARD t0, t0, bits
         STREST  t0, -1(t1)
         jr      ra
          move   len, zero
-dst_unaligned:
+.Ldst_unaligned:
         /*
          * dst is unaligned
          * t0 = src & ADDRMASK
@@ -317,22 +326,22 @@ dst_unaligned:
          * Set match = (src and dst have same alignment)
          */
 #define match rem
-EXC(    LDFIRST t3, FIRST(0)(src),      l_exc)
+EXC(    LDFIRST t3, FIRST(0)(src),      .Ll_exc)
         ADD     t2, zero, NBYTES
-EXC(    LDREST  t3, REST(0)(src),       l_exc_copy)
+EXC(    LDREST  t3, REST(0)(src),       .Ll_exc_copy)
         SUB     t2, t2, t1      # t2 = number of bytes copied
         xor     match, t0, t1
         STFIRST t3, FIRST(0)(dst)
-        beq     len, t2, done
+        beq     len, t2, .Ldone
          SUB    len, len, t2
         ADD     dst, dst, t2
-        beqz    match, both_aligned
+        beqz    match, .Lboth_aligned
          ADD    src, src, t2
 
-src_unaligned_dst_aligned:
+.Lsrc_unaligned_dst_aligned:
         SRL     t0, len, LOG_NBYTES+2    # +2 for 4 units/iter
         PREF(   0, 3*32(src) )
-        beqz    t0, cleanup_src_unaligned
+        beqz    t0, .Lcleanup_src_unaligned
          and    rem, len, (4*NBYTES-1)   # rem = len % 4*NBYTES
         PREF(   1, 3*32(dst) )
 1:
@@ -342,15 +351,15 @@ src_unaligned_dst_aligned:
  * It's OK to load FIRST(N+1) before REST(N) because the two addresses
  * are to the same unit (unless src is aligned, but it's not).
  */
-EXC(    LDFIRST t0, FIRST(0)(src),      l_exc)
-EXC(    LDFIRST t1, FIRST(1)(src),      l_exc_copy)
+EXC(    LDFIRST t0, FIRST(0)(src),      .Ll_exc)
+EXC(    LDFIRST t1, FIRST(1)(src),      .Ll_exc_copy)
         SUB     len, len, 4*NBYTES
-EXC(    LDREST  t0, REST(0)(src),       l_exc_copy)
-EXC(    LDREST  t1, REST(1)(src),       l_exc_copy)
-EXC(    LDFIRST t2, FIRST(2)(src),      l_exc_copy)
-EXC(    LDFIRST t3, FIRST(3)(src),      l_exc_copy)
-EXC(    LDREST  t2, REST(2)(src),       l_exc_copy)
-EXC(    LDREST  t3, REST(3)(src),       l_exc_copy)
+EXC(    LDREST  t0, REST(0)(src),       .Ll_exc_copy)
+EXC(    LDREST  t1, REST(1)(src),       .Ll_exc_copy)
+EXC(    LDFIRST t2, FIRST(2)(src),      .Ll_exc_copy)
+EXC(    LDFIRST t3, FIRST(3)(src),      .Ll_exc_copy)
+EXC(    LDREST  t2, REST(2)(src),       .Ll_exc_copy)
+EXC(    LDREST  t3, REST(3)(src),       .Ll_exc_copy)
         PREF(   0, 9*32(src) )          # 0 is PREF_LOAD  (not streamed)
         ADD     src, src, 4*NBYTES
 #ifdef CONFIG_CPU_SB1
@@ -361,32 +370,36 @@ EXC(	LDREST	t3, REST(3)(src),	l_exc_copy)
         STORE   t2, UNIT(2)(dst)
         STORE   t3, UNIT(3)(dst)
         PREF(   1, 9*32(dst) )          # 1 is PREF_STORE (not streamed)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 4*NBYTES
         bne     len, rem, 1b
-         ADD    dst, dst, 4*NBYTES
+        .set    noreorder
 
-cleanup_src_unaligned:
-        beqz    len, done
+.Lcleanup_src_unaligned:
+        beqz    len, .Ldone
          and    rem, len, NBYTES-1  # rem = len % NBYTES
-        beq     rem, len, copy_bytes
+        beq     rem, len, .Lcopy_bytes
          nop
 1:
-EXC(    LDFIRST t0, FIRST(0)(src),      l_exc)
-EXC(    LDREST  t0, REST(0)(src),       l_exc_copy)
+EXC(    LDFIRST t0, FIRST(0)(src),      .Ll_exc)
+EXC(    LDREST  t0, REST(0)(src),       .Ll_exc_copy)
         ADD     src, src, NBYTES
         SUB     len, len, NBYTES
         STORE   t0, 0(dst)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, NBYTES
         bne     len, rem, 1b
-         ADD    dst, dst, NBYTES
+        .set    noreorder
 
-copy_bytes_checklen:
-        beqz    len, done
+.Lcopy_bytes_checklen:
+        beqz    len, .Ldone
          nop
-copy_bytes:
+.Lcopy_bytes:
         /* 0 < len < NBYTES  */
 #define COPY_BYTE(N)                    \
-EXC(    lb      t0, N(src), l_exc);     \
+EXC(    lb      t0, N(src), .Ll_exc);   \
         SUB     len, len, 1;            \
-        beqz    len, done;              \
+        beqz    len, .Ldone;            \
          sb     t0, N(dst)
 
         COPY_BYTE(0)
@@ -397,16 +410,16 @@ EXC(	lb	t0, N(src), l_exc);	\
         COPY_BYTE(4)
         COPY_BYTE(5)
 #endif
-EXC(    lb      t0, NBYTES-2(src), l_exc)
+EXC(    lb      t0, NBYTES-2(src), .Ll_exc)
         SUB     len, len, 1
         jr      ra
          sb     t0, NBYTES-2(dst)
-done:
+.Ldone:
         jr      ra
          nop
         END(__copy_user_inatomic)
 
-l_exc_copy:
+.Ll_exc_copy:
         /*
          * Copy bytes from src until faulting load address (or until a
          * lb faults)
@@ -421,12 +434,14 @@ l_exc_copy:
          nop
         LOAD    t0, THREAD_BUADDR(t0)
 1:
-EXC(    lb      t1, 0(src),     l_exc)
+EXC(    lb      t1, 0(src),     .Ll_exc)
         ADD     src, src, 1
         sb      t1, 0(dst)      # can't fault -- we're copy_from_user
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 1
         bne     src, t0, 1b
-         ADD    dst, dst, 1
-l_exc:
+        .set    noreorder
+.Ll_exc:
         LOAD    t0, TI_TASK($28)
          nop
         LOAD    t0, THREAD_BUADDR(t0)   # t0 is just past last good address
diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S
index a526c62cb76a..c06cccf60bec 100644
--- a/arch/mips/lib/memcpy.S
+++ b/arch/mips/lib/memcpy.S
@@ -9,6 +9,7 @@
  * Copyright (C) 1999, 2000, 01, 2002 Silicon Graphics, Inc.
  * Copyright (C) 2002 Broadcom, Inc.
  *   memcpy/copy_user author: Mark Vandevoorde
+ * Copyright (C) 2007  Maciej W. Rozycki
  *
  * Mnemonic names for arguments to memcpy/__copy_user
  */
@@ -175,7 +176,11 @@
 
         .text
         .set    noreorder
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
         .set    noat
+#else
+        .set    at=v1
+#endif
 
 /*
  * A combined memcpy/__copy_user
@@ -186,7 +191,7 @@
         .align  5
 LEAF(memcpy)                                    /* a0=dst a1=src a2=len */
         move    v0, dst                         /* return value */
-__memcpy:
+.L__memcpy:
 FEXPORT(__copy_user)
         /*
          * Note: dst & src may be unaligned, len may be 0
@@ -194,6 +199,7 @@ FEXPORT(__copy_user)
          */
 #define rem t8
 
+        R10KCBARRIER(0(ra))
         /*
          * The "issue break"s below are very approximate.
          * Issue delays for dcache fills will perturb the schedule, as will
@@ -207,44 +213,45 @@ FEXPORT(__copy_user)
         and     t1, dst, ADDRMASK
         PREF(   0, 1*32(src) )
         PREF(   1, 1*32(dst) )
-        bnez    t2, copy_bytes_checklen
+        bnez    t2, .Lcopy_bytes_checklen
          and    t0, src, ADDRMASK
         PREF(   0, 2*32(src) )
         PREF(   1, 2*32(dst) )
-        bnez    t1, dst_unaligned
+        bnez    t1, .Ldst_unaligned
          nop
-        bnez    t0, src_unaligned_dst_aligned
+        bnez    t0, .Lsrc_unaligned_dst_aligned
         /*
          * use delay slot for fall-through
          * src and dst are aligned; need to compute rem
          */
-both_aligned:
+.Lboth_aligned:
          SRL    t0, len, LOG_NBYTES+3    # +3 for 8 units/iter
-        beqz    t0, cleanup_both_aligned # len < 8*NBYTES
+        beqz    t0, .Lcleanup_both_aligned # len < 8*NBYTES
          and    rem, len, (8*NBYTES-1)   # rem = len % (8*NBYTES)
         PREF(   0, 3*32(src) )
         PREF(   1, 3*32(dst) )
         .align  4
 1:
-EXC(    LOAD    t0, UNIT(0)(src),       l_exc)
-EXC(    LOAD    t1, UNIT(1)(src),       l_exc_copy)
-EXC(    LOAD    t2, UNIT(2)(src),       l_exc_copy)
-EXC(    LOAD    t3, UNIT(3)(src),       l_exc_copy)
+        R10KCBARRIER(0(ra))
+EXC(    LOAD    t0, UNIT(0)(src),       .Ll_exc)
+EXC(    LOAD    t1, UNIT(1)(src),       .Ll_exc_copy)
+EXC(    LOAD    t2, UNIT(2)(src),       .Ll_exc_copy)
+EXC(    LOAD    t3, UNIT(3)(src),       .Ll_exc_copy)
         SUB     len, len, 8*NBYTES
-EXC(    LOAD    t4, UNIT(4)(src),       l_exc_copy)
-EXC(    LOAD    t7, UNIT(5)(src),       l_exc_copy)
-EXC(    STORE   t0, UNIT(0)(dst),       s_exc_p8u)
-EXC(    STORE   t1, UNIT(1)(dst),       s_exc_p7u)
-EXC(    LOAD    t0, UNIT(6)(src),       l_exc_copy)
-EXC(    LOAD    t1, UNIT(7)(src),       l_exc_copy)
+EXC(    LOAD    t4, UNIT(4)(src),       .Ll_exc_copy)
+EXC(    LOAD    t7, UNIT(5)(src),       .Ll_exc_copy)
+EXC(    STORE   t0, UNIT(0)(dst),       .Ls_exc_p8u)
+EXC(    STORE   t1, UNIT(1)(dst),       .Ls_exc_p7u)
+EXC(    LOAD    t0, UNIT(6)(src),       .Ll_exc_copy)
+EXC(    LOAD    t1, UNIT(7)(src),       .Ll_exc_copy)
         ADD     src, src, 8*NBYTES
         ADD     dst, dst, 8*NBYTES
-EXC(    STORE   t2, UNIT(-6)(dst),      s_exc_p6u)
-EXC(    STORE   t3, UNIT(-5)(dst),      s_exc_p5u)
-EXC(    STORE   t4, UNIT(-4)(dst),      s_exc_p4u)
-EXC(    STORE   t7, UNIT(-3)(dst),      s_exc_p3u)
-EXC(    STORE   t0, UNIT(-2)(dst),      s_exc_p2u)
-EXC(    STORE   t1, UNIT(-1)(dst),      s_exc_p1u)
+EXC(    STORE   t2, UNIT(-6)(dst),      .Ls_exc_p6u)
+EXC(    STORE   t3, UNIT(-5)(dst),      .Ls_exc_p5u)
+EXC(    STORE   t4, UNIT(-4)(dst),      .Ls_exc_p4u)
+EXC(    STORE   t7, UNIT(-3)(dst),      .Ls_exc_p3u)
+EXC(    STORE   t0, UNIT(-2)(dst),      .Ls_exc_p2u)
+EXC(    STORE   t1, UNIT(-1)(dst),      .Ls_exc_p1u)
         PREF(   0, 8*32(src) )
         PREF(   1, 8*32(dst) )
         bne     len, rem, 1b
@@ -253,39 +260,45 @@ EXC(	STORE	t1, UNIT(-1)(dst),	s_exc_p1u)
         /*
          * len == rem == the number of bytes left to copy < 8*NBYTES
          */
-cleanup_both_aligned:
-        beqz    len, done
+.Lcleanup_both_aligned:
+        beqz    len, .Ldone
          sltu   t0, len, 4*NBYTES
-        bnez    t0, less_than_4units
+        bnez    t0, .Lless_than_4units
          and    rem, len, (NBYTES-1)    # rem = len % NBYTES
         /*
          * len >= 4*NBYTES
          */
-EXC(    LOAD    t0, UNIT(0)(src),       l_exc)
-EXC(    LOAD    t1, UNIT(1)(src),       l_exc_copy)
-EXC(    LOAD    t2, UNIT(2)(src),       l_exc_copy)
-EXC(    LOAD    t3, UNIT(3)(src),       l_exc_copy)
+EXC(    LOAD    t0, UNIT(0)(src),       .Ll_exc)
+EXC(    LOAD    t1, UNIT(1)(src),       .Ll_exc_copy)
+EXC(    LOAD    t2, UNIT(2)(src),       .Ll_exc_copy)
+EXC(    LOAD    t3, UNIT(3)(src),       .Ll_exc_copy)
         SUB     len, len, 4*NBYTES
         ADD     src, src, 4*NBYTES
-EXC(    STORE   t0, UNIT(0)(dst),       s_exc_p4u)
-EXC(    STORE   t1, UNIT(1)(dst),       s_exc_p3u)
-EXC(    STORE   t2, UNIT(2)(dst),       s_exc_p2u)
-EXC(    STORE   t3, UNIT(3)(dst),       s_exc_p1u)
-        beqz    len, done
-         ADD    dst, dst, 4*NBYTES
-less_than_4units:
+        R10KCBARRIER(0(ra))
+EXC(    STORE   t0, UNIT(0)(dst),       .Ls_exc_p4u)
+EXC(    STORE   t1, UNIT(1)(dst),       .Ls_exc_p3u)
+EXC(    STORE   t2, UNIT(2)(dst),       .Ls_exc_p2u)
+EXC(    STORE   t3, UNIT(3)(dst),       .Ls_exc_p1u)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 4*NBYTES
+        beqz    len, .Ldone
+        .set    noreorder
+.Lless_than_4units:
         /*
          * rem = len % NBYTES
          */
-        beq     rem, len, copy_bytes
+        beq     rem, len, .Lcopy_bytes
          nop
 1:
-EXC(    LOAD    t0, 0(src),             l_exc)
+        R10KCBARRIER(0(ra))
+EXC(    LOAD    t0, 0(src),             .Ll_exc)
         ADD     src, src, NBYTES
         SUB     len, len, NBYTES
-EXC(    STORE   t0, 0(dst),             s_exc_p1u)
+EXC(    STORE   t0, 0(dst),             .Ls_exc_p1u)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, NBYTES
         bne     rem, len, 1b
-         ADD    dst, dst, NBYTES
+        .set    noreorder
 
         /*
          * src and dst are aligned, need to copy rem bytes (rem < NBYTES)
@@ -299,17 +312,17 @@ EXC(	STORE	t0, 0(dst),		s_exc_p1u)
          * more instruction-level parallelism.
          */
 #define bits t2
-        beqz    len, done
+        beqz    len, .Ldone
          ADD    t1, dst, len    # t1 is just past last byte of dst
         li      bits, 8*NBYTES
         SLL     rem, len, 3     # rem = number of bits to keep
-EXC(    LOAD    t0, 0(src),             l_exc)
+EXC(    LOAD    t0, 0(src),             .Ll_exc)
         SUB     bits, bits, rem # bits = number of bits to discard
         SHIFT_DISCARD t0, t0, bits
-EXC(    STREST  t0, -1(t1),             s_exc)
+EXC(    STREST  t0, -1(t1),             .Ls_exc)
         jr      ra
          move   len, zero
-dst_unaligned:
+.Ldst_unaligned:
         /*
          * dst is unaligned
          * t0 = src & ADDRMASK
@@ -320,22 +333,23 @@ dst_unaligned:
          * Set match = (src and dst have same alignment)
          */
 #define match rem
-EXC(    LDFIRST t3, FIRST(0)(src),      l_exc)
+EXC(    LDFIRST t3, FIRST(0)(src),      .Ll_exc)
         ADD     t2, zero, NBYTES
-EXC(    LDREST  t3, REST(0)(src),       l_exc_copy)
+EXC(    LDREST  t3, REST(0)(src),       .Ll_exc_copy)
         SUB     t2, t2, t1      # t2 = number of bytes copied
         xor     match, t0, t1
-EXC(    STFIRST t3, FIRST(0)(dst),      s_exc)
-        beq     len, t2, done
+        R10KCBARRIER(0(ra))
+EXC(    STFIRST t3, FIRST(0)(dst),      .Ls_exc)
+        beq     len, t2, .Ldone
          SUB    len, len, t2
         ADD     dst, dst, t2
-        beqz    match, both_aligned
+        beqz    match, .Lboth_aligned
          ADD    src, src, t2
 
-src_unaligned_dst_aligned:
+.Lsrc_unaligned_dst_aligned:
         SRL     t0, len, LOG_NBYTES+2    # +2 for 4 units/iter
         PREF(   0, 3*32(src) )
-        beqz    t0, cleanup_src_unaligned
+        beqz    t0, .Lcleanup_src_unaligned
          and    rem, len, (4*NBYTES-1)   # rem = len % 4*NBYTES
         PREF(   1, 3*32(dst) )
 1:
@@ -345,52 +359,59 @@ src_unaligned_dst_aligned:
  * It's OK to load FIRST(N+1) before REST(N) because the two addresses
  * are to the same unit (unless src is aligned, but it's not).
  */
-EXC(    LDFIRST t0, FIRST(0)(src),      l_exc)
-EXC(    LDFIRST t1, FIRST(1)(src),      l_exc_copy)
+        R10KCBARRIER(0(ra))
+EXC(    LDFIRST t0, FIRST(0)(src),      .Ll_exc)
+EXC(    LDFIRST t1, FIRST(1)(src),      .Ll_exc_copy)
         SUB     len, len, 4*NBYTES
-EXC(    LDREST  t0, REST(0)(src),       l_exc_copy)
-EXC(    LDREST  t1, REST(1)(src),       l_exc_copy)
-EXC(    LDFIRST t2, FIRST(2)(src),      l_exc_copy)
-EXC(    LDFIRST t3, FIRST(3)(src),      l_exc_copy)
-EXC(    LDREST  t2, REST(2)(src),       l_exc_copy)
-EXC(    LDREST  t3, REST(3)(src),       l_exc_copy)
+EXC(    LDREST  t0, REST(0)(src),       .Ll_exc_copy)
+EXC(    LDREST  t1, REST(1)(src),       .Ll_exc_copy)
+EXC(    LDFIRST t2, FIRST(2)(src),      .Ll_exc_copy)
+EXC(    LDFIRST t3, FIRST(3)(src),      .Ll_exc_copy)
+EXC(    LDREST  t2, REST(2)(src),       .Ll_exc_copy)
+EXC(    LDREST  t3, REST(3)(src),       .Ll_exc_copy)
         PREF(   0, 9*32(src) )          # 0 is PREF_LOAD  (not streamed)
         ADD     src, src, 4*NBYTES
 #ifdef CONFIG_CPU_SB1
         nop                             # improves slotting
 #endif
-EXC(    STORE   t0, UNIT(0)(dst),       s_exc_p4u)
-EXC(    STORE   t1, UNIT(1)(dst),       s_exc_p3u)
-EXC(    STORE   t2, UNIT(2)(dst),       s_exc_p2u)
-EXC(    STORE   t3, UNIT(3)(dst),       s_exc_p1u)
+EXC(    STORE   t0, UNIT(0)(dst),       .Ls_exc_p4u)
+EXC(    STORE   t1, UNIT(1)(dst),       .Ls_exc_p3u)
+EXC(    STORE   t2, UNIT(2)(dst),       .Ls_exc_p2u)
+EXC(    STORE   t3, UNIT(3)(dst),       .Ls_exc_p1u)
         PREF(   1, 9*32(dst) )          # 1 is PREF_STORE (not streamed)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 4*NBYTES
         bne     len, rem, 1b
-         ADD    dst, dst, 4*NBYTES
+        .set    noreorder
 
-cleanup_src_unaligned:
-        beqz    len, done
+.Lcleanup_src_unaligned:
+        beqz    len, .Ldone
          and    rem, len, NBYTES-1  # rem = len % NBYTES
-        beq     rem, len, copy_bytes
+        beq     rem, len, .Lcopy_bytes
          nop
 1:
-EXC(    LDFIRST t0, FIRST(0)(src),      l_exc)
-EXC(    LDREST  t0, REST(0)(src),       l_exc_copy)
+        R10KCBARRIER(0(ra))
+EXC(    LDFIRST t0, FIRST(0)(src),      .Ll_exc)
+EXC(    LDREST  t0, REST(0)(src),       .Ll_exc_copy)
         ADD     src, src, NBYTES
         SUB     len, len, NBYTES
-EXC(    STORE   t0, 0(dst),             s_exc_p1u)
+EXC(    STORE   t0, 0(dst),             .Ls_exc_p1u)
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, NBYTES
         bne     len, rem, 1b
-         ADD    dst, dst, NBYTES
+        .set    noreorder
 
-copy_bytes_checklen:
-        beqz    len, done
+.Lcopy_bytes_checklen:
+        beqz    len, .Ldone
          nop
-copy_bytes:
+.Lcopy_bytes:
         /* 0 < len < NBYTES  */
+        R10KCBARRIER(0(ra))
 #define COPY_BYTE(N)                    \
-EXC(    lb      t0, N(src), l_exc);     \
+EXC(    lb      t0, N(src), .Ll_exc);   \
         SUB     len, len, 1;            \
-        beqz    len, done;              \
-EXC(     sb     t0, N(dst), s_exc_p1)
+        beqz    len, .Ldone;            \
+EXC(     sb     t0, N(dst), .Ls_exc_p1)
 
         COPY_BYTE(0)
         COPY_BYTE(1)
@@ -400,16 +421,16 @@ EXC(	 sb	t0, N(dst), s_exc_p1)
         COPY_BYTE(4)
         COPY_BYTE(5)
 #endif
-EXC(    lb      t0, NBYTES-2(src), l_exc)
+EXC(    lb      t0, NBYTES-2(src), .Ll_exc)
         SUB     len, len, 1
         jr      ra
-EXC(     sb     t0, NBYTES-2(dst), s_exc_p1)
-done:
+EXC(     sb     t0, NBYTES-2(dst), .Ls_exc_p1)
+.Ldone:
         jr      ra
          nop
         END(memcpy)
 
-l_exc_copy:
+.Ll_exc_copy:
         /*
          * Copy bytes from src until faulting load address (or until a
          * lb faults)
@@ -424,12 +445,14 @@ l_exc_copy:
          nop
         LOAD    t0, THREAD_BUADDR(t0)
 1:
-EXC(    lb      t1, 0(src),     l_exc)
+EXC(    lb      t1, 0(src),     .Ll_exc)
         ADD     src, src, 1
         sb      t1, 0(dst)      # can't fault -- we're copy_from_user
+        .set    reorder                         /* DADDI_WAR */
+        ADD     dst, dst, 1
         bne     src, t0, 1b
-         ADD    dst, dst, 1
-l_exc:
+        .set    noreorder
+.Ll_exc:
         LOAD    t0, TI_TASK($28)
          nop
         LOAD    t0, THREAD_BUADDR(t0)   # t0 is just past last good address
@@ -446,20 +469,33 @@ l_exc:
          * Clear len bytes starting at dst.  Can't call __bzero because it
          * might modify len.  An inefficient loop for these rare times...
          */
-        beqz    len, done
-         SUB    src, len, 1
+        .set    reorder                         /* DADDI_WAR */
+        SUB     src, len, 1
+        beqz    len, .Ldone
+        .set    noreorder
 1:      sb      zero, 0(dst)
         ADD     dst, dst, 1
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
         bnez    src, 1b
          SUB    src, src, 1
+#else
+        .set    push
+        .set    noat
+        li      v1, 1
+        bnez    src, 1b
+         SUB    src, src, v1
+        .set    pop
+#endif
         jr      ra
          nop
 
 
-#define SEXC(n)                         \
-s_exc_p ## n ## u:                      \
-        jr      ra;                     \
-         ADD    len, len, n*NBYTES
+#define SEXC(n)                                                 \
+        .set    reorder;                        /* DADDI_WAR */ \
+.Ls_exc_p ## n ## u:                                            \
+        ADD     len, len, n*NBYTES;                             \
+        jr      ra;                                             \
+        .set    noreorder
 
 SEXC(8)
 SEXC(7)
@@ -470,10 +506,12 @@ SEXC(3)
 SEXC(2)
 SEXC(1)
 
-s_exc_p1:
+.Ls_exc_p1:
+        .set    reorder                         /* DADDI_WAR */
+        ADD     len, len, 1
         jr      ra
-         ADD    len, len, 1
-s_exc:
+        .set    noreorder
+.Ls_exc:
         jr      ra
          nop
 
@@ -484,38 +522,44 @@ LEAF(memmove)
         sltu    t0, a1, t0                      # dst + len <= src -> memcpy
         sltu    t1, a0, t1                      # dst >= src + len -> memcpy
         and     t0, t1
-        beqz    t0, __memcpy
+        beqz    t0, .L__memcpy
          move   v0, a0                          /* return value */
-        beqz    a2, r_out
+        beqz    a2, .Lr_out
         END(memmove)
 
         /* fall through to __rmemcpy */
 LEAF(__rmemcpy)                                 /* a0=dst a1=src a2=len */
          sltu   t0, a1, a0
-        beqz    t0, r_end_bytes_up              # src >= dst
+        beqz    t0, .Lr_end_bytes_up            # src >= dst
          nop
         ADD     a0, a2                          # dst = dst + len
         ADD     a1, a2                          # src = src + len
 
-r_end_bytes:
+.Lr_end_bytes:
+        R10KCBARRIER(0(ra))
         lb      t0, -1(a1)
         SUB     a2, a2, 0x1
         sb      t0, -1(a0)
         SUB     a1, a1, 0x1
-        bnez    a2, r_end_bytes
-         SUB    a0, a0, 0x1
+        .set    reorder                         /* DADDI_WAR */
+        SUB     a0, a0, 0x1
+        bnez    a2, .Lr_end_bytes
+        .set    noreorder
 
-r_out:
+.Lr_out:
         jr      ra
          move   a2, zero
 
-r_end_bytes_up:
+.Lr_end_bytes_up:
+        R10KCBARRIER(0(ra))
         lb      t0, (a1)
         SUB     a2, a2, 0x1
         sb      t0, (a0)
         ADD     a1, a1, 0x1
-        bnez    a2, r_end_bytes_up
-         ADD    a0, a0, 0x1
+        .set    reorder                         /* DADDI_WAR */
+        ADD     a0, a0, 0x1
+        bnez    a2, .Lr_end_bytes_up
+        .set    noreorder
 
         jr      ra
          move   a2, zero
diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S
index 3f8b8b3d0b23..77dc3b20110a 100644
--- a/arch/mips/lib/memset.S
+++ b/arch/mips/lib/memset.S
@@ -5,6 +5,7 @@
  *
  * Copyright (C) 1998, 1999, 2000 by Ralf Baechle
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2007  Maciej W. Rozycki
  */
 #include <asm/asm.h>
 #include <asm/asm-offsets.h>
@@ -71,34 +72,45 @@ LEAF(memset)
 
 FEXPORT(__bzero)
         sltiu           t0, a2, LONGSIZE        /* very small region? */
-        bnez            t0, small_memset
+        bnez            t0, .Lsmall_memset
          andi           t0, a0, LONGMASK        /* aligned? */
 
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
         beqz            t0, 1f
          PTR_SUBU       t0, LONGSIZE            /* alignment in bytes */
+#else
+        .set            noat
+        li              AT, LONGSIZE
+        beqz            t0, 1f
+         PTR_SUBU       t0, AT                  /* alignment in bytes */
+        .set            at
+#endif
 
+        R10KCBARRIER(0(ra))
 #ifdef __MIPSEB__
-        EX(LONG_S_L, a1, (a0), first_fixup)     /* make word/dword aligned */
+        EX(LONG_S_L, a1, (a0), .Lfirst_fixup)   /* make word/dword aligned */
 #endif
 #ifdef __MIPSEL__
-        EX(LONG_S_R, a1, (a0), first_fixup)     /* make word/dword aligned */
+        EX(LONG_S_R, a1, (a0), .Lfirst_fixup)   /* make word/dword aligned */
 #endif
         PTR_SUBU        a0, t0                  /* long align ptr */
         PTR_ADDU        a2, t0                  /* correct size */
 
 1:      ori             t1, a2, 0x3f            /* # of full blocks */
         xori            t1, 0x3f
-        beqz            t1, memset_partial      /* no block to fill */
+        beqz            t1, .Lmemset_partial    /* no block to fill */
          andi           t0, a2, 0x40-LONGSIZE
 
         PTR_ADDU        t1, a0                  /* end address */
         .set            reorder
 1:      PTR_ADDIU       a0, 64
-        f_fill64 a0, -64, a1, fwd_fixup
+        R10KCBARRIER(0(ra))
+        f_fill64 a0, -64, a1, .Lfwd_fixup
         bne             t1, a0, 1b
         .set            noreorder
 
-memset_partial:
+.Lmemset_partial:
+        R10KCBARRIER(0(ra))
         PTR_LA          t1, 2f                  /* where to start */
 #if LONGSIZE == 4
         PTR_SUBU        t1, t0
@@ -106,7 +118,7 @@ memset_partial:
         .set            noat
         LONG_SRL                AT, t0, 1
         PTR_SUBU        t1, AT
-        .set            noat
+        .set            at
 #endif
         jr              t1
          PTR_ADDU       a0, t0                  /* dest ptr */
@@ -114,26 +126,28 @@ memset_partial:
         .set            push
         .set            noreorder
         .set            nomacro
-        f_fill64 a0, -64, a1, partial_fixup     /* ... but first do longs ... */
+        f_fill64 a0, -64, a1, .Lpartial_fixup   /* ... but first do longs ... */
 2:      .set            pop
         andi            a2, LONGMASK            /* At most one long to go */
 
         beqz            a2, 1f
          PTR_ADDU       a0, a2                  /* What's left */
+        R10KCBARRIER(0(ra))
 #ifdef __MIPSEB__
-        EX(LONG_S_R, a1, -1(a0), last_fixup)
+        EX(LONG_S_R, a1, -1(a0), .Llast_fixup)
 #endif
 #ifdef __MIPSEL__
-        EX(LONG_S_L, a1, -1(a0), last_fixup)
+        EX(LONG_S_L, a1, -1(a0), .Llast_fixup)
 #endif
 1:      jr              ra
          move           a2, zero
 
-small_memset:
+.Lsmall_memset:
         beqz            a2, 2f
          PTR_ADDU       t1, a0, a2
 
 1:      PTR_ADDIU       a0, 1                   /* fill bytewise */
+        R10KCBARRIER(0(ra))
         bne             t1, a0, 1b
          sb             a1, -1(a0)
 
@@ -141,11 +155,11 @@ small_memset:
          move           a2, zero
         END(memset)
 
-first_fixup:
+.Lfirst_fixup:
         jr      ra
          nop
 
-fwd_fixup:
+.Lfwd_fixup:
         PTR_L           t0, TI_TASK($28)
         LONG_L          t0, THREAD_BUADDR(t0)
         andi            a2, 0x3f
@@ -153,7 +167,7 @@ fwd_fixup:
         jr              ra
          LONG_SUBU      a2, t0
 
-partial_fixup:
+.Lpartial_fixup:
         PTR_L           t0, TI_TASK($28)
         LONG_L          t0, THREAD_BUADDR(t0)
         andi            a2, LONGMASK
@@ -161,6 +175,6 @@ partial_fixup:
         jr              ra
          LONG_SUBU      a2, t0
 
-last_fixup:
+.Llast_fixup:
         jr              ra
          andi           v1, a2, LONGMASK
diff --git a/arch/mips/lib/strlen_user.S b/arch/mips/lib/strlen_user.S
index eca558d83a37..fdbb970f670d 100644
--- a/arch/mips/lib/strlen_user.S
+++ b/arch/mips/lib/strlen_user.S
@@ -24,16 +24,16 @@
 LEAF(__strlen_user_asm)
         LONG_L          v0, TI_ADDR_LIMIT($28)  # pointer ok?
         and             v0, a0
-        bnez            v0, fault
+        bnez            v0, .Lfault
 
 FEXPORT(__strlen_user_nocheck_asm)
         move            v0, a0
-1:      EX(lb, t0, (v0), fault)
+1:      EX(lb, t0, (v0), .Lfault)
         PTR_ADDIU       v0, 1
         bnez            t0, 1b
         PTR_SUBU        v0, a0
         jr              ra
         END(__strlen_user_asm)
 
-fault:  move            v0, zero
+.Lfault:        move            v0, zero
         jr              ra
diff --git a/arch/mips/lib/strncpy_user.S b/arch/mips/lib/strncpy_user.S
index d16c76fbfac7..7201b2ff08c8 100644
--- a/arch/mips/lib/strncpy_user.S
+++ b/arch/mips/lib/strncpy_user.S
@@ -30,29 +30,30 @@
 LEAF(__strncpy_from_user_asm)
         LONG_L          v0, TI_ADDR_LIMIT($28)  # pointer ok?
         and             v0, a1
-        bnez            v0, fault
+        bnez            v0, .Lfault
 
 FEXPORT(__strncpy_from_user_nocheck_asm)
         move            v0, zero
         move            v1, a1
         .set            noreorder
-1:      EX(lbu, t0, (v1), fault)
+1:      EX(lbu, t0, (v1), .Lfault)
         PTR_ADDIU       v1, 1
+        R10KCBARRIER(0(ra))
         beqz            t0, 2f
          sb             t0, (a0)
         PTR_ADDIU       v0, 1
-        bne             v0, a2, 1b
-         PTR_ADDIU      a0, 1
         .set            reorder
+        PTR_ADDIU       a0, 1
+        bne             v0, a2, 1b
 2:      PTR_ADDU        t0, a1, v0
         xor             t0, a1
-        bltz            t0, fault
+        bltz            t0, .Lfault
         jr              ra                      # return n
         END(__strncpy_from_user_asm)
 
-fault:  li              v0, -EFAULT
+.Lfault:        li              v0, -EFAULT
         jr              ra
 
         .section        __ex_table,"a"
-        PTR             1b, fault
+        PTR             1b, .Lfault
         .previous
diff --git a/arch/mips/lib/strnlen_user.S b/arch/mips/lib/strnlen_user.S
index c0ea15194a0e..c768e3000616 100644
--- a/arch/mips/lib/strnlen_user.S
+++ b/arch/mips/lib/strnlen_user.S
@@ -28,18 +28,19 @@
 LEAF(__strnlen_user_asm)
         LONG_L          v0, TI_ADDR_LIMIT($28)  # pointer ok?
         and             v0, a0
-        bnez            v0, fault
+        bnez            v0, .Lfault
 
 FEXPORT(__strnlen_user_nocheck_asm)
         move            v0, a0
         PTR_ADDU        a1, a0                  # stop pointer
 1:      beq             v0, a1, 1f              # limit reached?
-        EX(lb, t0, (v0), fault)
+        EX(lb, t0, (v0), .Lfault)
         PTR_ADDU        v0, 1
         bnez            t0, 1b
 1:      PTR_SUBU        v0, a0
         jr              ra
         END(__strnlen_user_asm)
 
-fault:  move            v0, zero
+.Lfault:
+        move            v0, zero
         jr              ra
diff --git a/arch/mips/lib/uncached.c b/arch/mips/lib/uncached.c
index 58d14f4d9349..27b012d4341c 100644
--- a/arch/mips/lib/uncached.c
+++ b/arch/mips/lib/uncached.c
@@ -46,9 +46,9 @@ unsigned long __init run_uncached(void *func)
         if (sp >= (long)CKSEG0 && sp < (long)CKSEG2)
                 usp = CKSEG1ADDR(sp);
 #ifdef CONFIG_64BIT
-        else if ((long long)sp >= (long long)PHYS_TO_XKPHYS(0LL, 0) &&
-                 (long long)sp < (long long)PHYS_TO_XKPHYS(8LL, 0))
-                usp = PHYS_TO_XKPHYS((long long)K_CALG_UNCACHED,
+        else if ((long long)sp >= (long long)PHYS_TO_XKPHYS(0, 0) &&
+                 (long long)sp < (long long)PHYS_TO_XKPHYS(8, 0))
+                usp = PHYS_TO_XKPHYS(K_CALG_UNCACHED,
                                      XKPHYS_TO_PHYS((long long)sp));
 #endif
         else {
@@ -58,9 +58,9 @@ unsigned long __init run_uncached(void *func)
         if (lfunc >= (long)CKSEG0 && lfunc < (long)CKSEG2)
                 ufunc = CKSEG1ADDR(lfunc);
 #ifdef CONFIG_64BIT
-        else if ((long long)lfunc >= (long long)PHYS_TO_XKPHYS(0LL, 0) &&
-                 (long long)lfunc < (long long)PHYS_TO_XKPHYS(8LL, 0))
-                ufunc = PHYS_TO_XKPHYS((long long)K_CALG_UNCACHED,
+        else if ((long long)lfunc >= (long long)PHYS_TO_XKPHYS(0, 0) &&
+                 (long long)lfunc < (long long)PHYS_TO_XKPHYS(8, 0))
+                ufunc = PHYS_TO_XKPHYS(K_CALG_UNCACHED,
                                        XKPHYS_TO_PHYS((long long)lfunc));
 #endif
         else {
diff --git a/arch/mips/mips-boards/atlas/atlas_setup.c b/arch/mips/mips-boards/atlas/atlas_setup.c
index e405d112a067..5c500802271e 100644
--- a/arch/mips/mips-boards/atlas/atlas_setup.c
+++ b/arch/mips/mips-boards/atlas/atlas_setup.c
@@ -34,12 +34,6 @@
 #include <asm/time.h>
 #include <asm/traps.h>
 
-extern void mips_reboot_setup(void);
-
-#ifdef CONFIG_KGDB
-extern void kgdb_config(void);
-#endif
-
 static void __init serial_init(void);
 
 const char *get_system_type(void)
diff --git a/arch/mips/mips-boards/generic/init.c b/arch/mips/mips-boards/generic/init.c
index 30f1f54cb68b..1695dca5506b 100644
--- a/arch/mips/mips-boards/generic/init.c
+++ b/arch/mips/mips-boards/generic/init.c
@@ -250,6 +250,8 @@ void __init mips_ejtag_setup(void)
         flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
 }
 
+extern struct plat_smp_ops msmtc_smp_ops;
+
 void __init prom_init(void)
 {
         prom_argc = fw_arg0;
@@ -416,4 +418,10 @@ void __init prom_init(void)
 #ifdef CONFIG_SERIAL_8250_CONSOLE
         console_config();
 #endif
+#ifdef CONFIG_MIPS_MT_SMP
+        register_smp_ops(&vsmp_smp_ops);
+#endif
+#ifdef CONFIG_MIPS_MT_SMTC
+        register_smp_ops(&msmtc_smp_ops);
+#endif
 }
diff --git a/arch/mips/mips-boards/malta/malta_int.c b/arch/mips/mips-boards/malta/malta_int.c
index f010261b75d8..dbe60eb55e29 100644
--- a/arch/mips/mips-boards/malta/malta_int.c
+++ b/arch/mips/mips-boards/malta/malta_int.c
@@ -26,13 +26,13 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 #include <linux/kernel_stat.h>
 #include <linux/kernel.h>
 #include <linux/random.h>
 
 #include <asm/i8259.h>
 #include <asm/irq_cpu.h>
-#include <asm/io.h>
 #include <asm/irq_regs.h>
 #include <asm/mips-boards/malta.h>
 #include <asm/mips-boards/maltaint.h>
@@ -47,7 +47,7 @@ static DEFINE_SPINLOCK(mips_irq_lock);
 static inline int mips_pcibios_iack(void)
 {
         int irq;
-        u32 dummy;
+        u32 dummy;
 
         /*
          * Determine highest priority pending interrupt by performing
@@ -58,7 +58,7 @@ static inline int mips_pcibios_iack(void)
         case MIPS_REVISION_SCON_ROCIT:
         case MIPS_REVISION_SCON_SOCITSC:
         case MIPS_REVISION_SCON_SOCITSCP:
-                MSC_READ(MSC01_PCI_IACK, irq);
+                MSC_READ(MSC01_PCI_IACK, irq);
                 irq &= 0xff;
                 break;
         case MIPS_REVISION_SCON_GT64120:
@@ -83,7 +83,7 @@ static inline int mips_pcibios_iack(void)
                 BONITO_PCIMAP_CFG = 0;
                 break;
         default:
-                printk("Unknown system controller.\n");
+                printk(KERN_WARNING "Unknown system controller.\n");
                 return -1;
         }
         return irq;
@@ -114,7 +114,8 @@ static void malta_hw0_irqdispatch(void)
 
         irq = get_int();
         if (irq < 0) {
-                return;  /* interrupt has already been cleared */
+                /* interrupt has already been cleared */
+                return;
         }
 
         do_IRQ(MALTA_INT_BASE + irq);
@@ -123,15 +124,15 @@ static void malta_hw0_irqdispatch(void)
 static void corehi_irqdispatch(void)
 {
         unsigned int intedge, intsteer, pcicmd, pcibadaddr;
-        unsigned int pcimstat, intisr, inten, intpol;
+        unsigned int pcimstat, intisr, inten, intpol;
         unsigned int intrcause, datalo, datahi;
         struct pt_regs *regs = get_irq_regs();
 
-        printk("CoreHI interrupt, shouldn't happen, so we die here!!!\n");
-        printk("epc   : %08lx\nStatus: %08lx\n"
-               "Cause : %08lx\nbadVaddr : %08lx\n",
-               regs->cp0_epc, regs->cp0_status,
-               regs->cp0_cause, regs->cp0_badvaddr);
+        printk(KERN_EMERG "CoreHI interrupt, shouldn't happen, we die here!\n");
+        printk(KERN_EMERG "epc   : %08lx\nStatus: %08lx\n"
+                        "Cause : %08lx\nbadVaddr : %08lx\n",
+                        regs->cp0_epc, regs->cp0_status,
+                        regs->cp0_cause, regs->cp0_badvaddr);
 
         /* Read all the registers and then print them as there is a
            problem with interspersed printk's upsetting the Bonito controller.
@@ -139,41 +140,41 @@ static void corehi_irqdispatch(void)
         */
 
         switch (mips_revision_sconid) {
-        case MIPS_REVISION_SCON_SOCIT:
+        case MIPS_REVISION_SCON_SOCIT:
         case MIPS_REVISION_SCON_ROCIT:
         case MIPS_REVISION_SCON_SOCITSC:
         case MIPS_REVISION_SCON_SOCITSCP:
-                ll_msc_irq();
-                break;
-        case MIPS_REVISION_SCON_GT64120:
-                intrcause = GT_READ(GT_INTRCAUSE_OFS);
-                datalo = GT_READ(GT_CPUERR_ADDRLO_OFS);
-                datahi = GT_READ(GT_CPUERR_ADDRHI_OFS);
-                printk("GT_INTRCAUSE = %08x\n", intrcause);
-                printk("GT_CPUERR_ADDR = %02x%08x\n", datahi, datalo);
-                break;
-        case MIPS_REVISION_SCON_BONITO:
-                pcibadaddr = BONITO_PCIBADADDR;
-                pcimstat = BONITO_PCIMSTAT;
-                intisr = BONITO_INTISR;
-                inten = BONITO_INTEN;
-                intpol = BONITO_INTPOL;
-                intedge = BONITO_INTEDGE;
-                intsteer = BONITO_INTSTEER;
-                pcicmd = BONITO_PCICMD;
-                printk("BONITO_INTISR = %08x\n", intisr);
-                printk("BONITO_INTEN = %08x\n", inten);
-                printk("BONITO_INTPOL = %08x\n", intpol);
-                printk("BONITO_INTEDGE = %08x\n", intedge);
-                printk("BONITO_INTSTEER = %08x\n", intsteer);
-                printk("BONITO_PCICMD = %08x\n", pcicmd);
-                printk("BONITO_PCIBADADDR = %08x\n", pcibadaddr);
-                printk("BONITO_PCIMSTAT = %08x\n", pcimstat);
-                break;
-        }
-
-        /* We die here*/
-        die("CoreHi interrupt", regs);
+                ll_msc_irq();
+                break;
+        case MIPS_REVISION_SCON_GT64120:
+                intrcause = GT_READ(GT_INTRCAUSE_OFS);
+                datalo = GT_READ(GT_CPUERR_ADDRLO_OFS);
+                datahi = GT_READ(GT_CPUERR_ADDRHI_OFS);
+                printk(KERN_EMERG "GT_INTRCAUSE = %08x\n", intrcause);
+                printk(KERN_EMERG "GT_CPUERR_ADDR = %02x%08x\n",
+                                datahi, datalo);
+                break;
+        case MIPS_REVISION_SCON_BONITO:
+                pcibadaddr = BONITO_PCIBADADDR;
+                pcimstat = BONITO_PCIMSTAT;
+                intisr = BONITO_INTISR;
+                inten = BONITO_INTEN;
+                intpol = BONITO_INTPOL;
+                intedge = BONITO_INTEDGE;
+                intsteer = BONITO_INTSTEER;
+                pcicmd = BONITO_PCICMD;
+                printk(KERN_EMERG "BONITO_INTISR = %08x\n", intisr);
+                printk(KERN_EMERG "BONITO_INTEN = %08x\n", inten);
+                printk(KERN_EMERG "BONITO_INTPOL = %08x\n", intpol);
+                printk(KERN_EMERG "BONITO_INTEDGE = %08x\n", intedge);
+                printk(KERN_EMERG "BONITO_INTSTEER = %08x\n", intsteer);
+                printk(KERN_EMERG "BONITO_PCICMD = %08x\n", pcicmd);
+                printk(KERN_EMERG "BONITO_PCIBADADDR = %08x\n", pcibadaddr);
+                printk(KERN_EMERG "BONITO_PCIMSTAT = %08x\n", pcimstat);
+                break;
+        }
+
+        die("CoreHi interrupt", regs);
 }
 
 static inline int clz(unsigned long x)
@@ -214,9 +215,9 @@ static inline unsigned int irq_ffs(unsigned int pending)
 
         t0 = pending & 0x8000;
         t0 = t0 < 1;
-        //t0 = t0 << 2;
+        /* t0 = t0 << 2; */
         a0 = a0 - t0;
-        //pending = pending << t0;
+        /* pending = pending << t0; */
 
         return a0;
 #endif
@@ -299,21 +300,29 @@ void __init arch_init_irq(void)
         if (!cpu_has_veic)
                 mips_cpu_irq_init();
 
-        switch(mips_revision_sconid) {
-        case MIPS_REVISION_SCON_SOCIT:
-        case MIPS_REVISION_SCON_ROCIT:
+        switch (mips_revision_sconid) {
+        case MIPS_REVISION_SCON_SOCIT:
+        case MIPS_REVISION_SCON_ROCIT:
                 if (cpu_has_veic)
-                        init_msc_irqs(MIPS_MSC01_IC_REG_BASE, MSC01E_INT_BASE, msc_eicirqmap, msc_nr_eicirqs);
+                        init_msc_irqs(MIPS_MSC01_IC_REG_BASE,
+                                        MSC01E_INT_BASE, msc_eicirqmap,
+                                        msc_nr_eicirqs);
                 else
-                        init_msc_irqs(MIPS_MSC01_IC_REG_BASE, MSC01C_INT_BASE, msc_irqmap, msc_nr_irqs);
+                        init_msc_irqs(MIPS_MSC01_IC_REG_BASE,
+                                        MSC01C_INT_BASE, msc_irqmap,
+                                        msc_nr_irqs);
                 break;
 
-        case MIPS_REVISION_SCON_SOCITSC:
-        case MIPS_REVISION_SCON_SOCITSCP:
+        case MIPS_REVISION_SCON_SOCITSC:
+        case MIPS_REVISION_SCON_SOCITSCP:
                 if (cpu_has_veic)
-                        init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE, MSC01E_INT_BASE, msc_eicirqmap, msc_nr_eicirqs);
+                        init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE,
+                                        MSC01E_INT_BASE, msc_eicirqmap,
+                                        msc_nr_eicirqs);
                 else
-                        init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE, MSC01C_INT_BASE, msc_irqmap, msc_nr_irqs);
+                        init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE,
+                                        MSC01C_INT_BASE, msc_irqmap,
+                                        msc_nr_irqs);
         }
 
         if (cpu_has_veic) {
@@ -321,8 +330,7 @@ void __init arch_init_irq(void)
                 set_vi_handler(MSC01E_INT_COREHI, corehi_irqdispatch);
                 setup_irq(MSC01E_INT_BASE+MSC01E_INT_I8259A, &i8259irq);
                 setup_irq(MSC01E_INT_BASE+MSC01E_INT_COREHI, &corehi_irqaction);
-        }
-        else if (cpu_has_vint) {
+        } else if (cpu_has_vint) {
                 set_vi_handler(MIPSCPU_INT_I8259A, malta_hw0_irqdispatch);
                 set_vi_handler(MIPSCPU_INT_COREHI, corehi_irqdispatch);
 #ifdef CONFIG_MIPS_MT_SMTC
@@ -344,11 +352,12 @@ void __init arch_init_irq(void)
                 }
 #else /* Not SMTC */
                 setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq);
-                setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+                setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI,
+                                                &corehi_irqaction);
 #endif /* CONFIG_MIPS_MT_SMTC */
-        }
-        else {
+        } else {
                 setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq);
-                setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+                setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI,
+                                                &corehi_irqaction);
         }
 }
diff --git a/arch/mips/mips-boards/malta/malta_setup.c b/arch/mips/mips-boards/malta/malta_setup.c
index bc43a5c2224d..2cd8f5734b36 100644
--- a/arch/mips/mips-boards/malta/malta_setup.c
+++ b/arch/mips/mips-boards/malta/malta_setup.c
@@ -1,6 +1,7 @@
 /*
  * Carsten Langgaard, carstenl@mips.com
  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ * Copyright (C) Dmitri Vorobiev
  *
  *  This program is free software; you can distribute it and/or modify it
  *  under the terms of the GNU General Public License (Version 2) as
@@ -15,39 +16,57 @@
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  */
+#include <linux/cpu.h>
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/ioport.h>
+#include <linux/irq.h>
 #include <linux/pci.h>
 #include <linux/screen_info.h>
+#include <linux/time.h>
 
-#include <asm/cpu.h>
 #include <asm/bootinfo.h>
-#include <asm/irq.h>
 #include <asm/mips-boards/generic.h>
 #include <asm/mips-boards/prom.h>
 #include <asm/mips-boards/malta.h>
 #include <asm/mips-boards/maltaint.h>
 #include <asm/dma.h>
-#include <asm/time.h>
 #include <asm/traps.h>
 #ifdef CONFIG_VT
 #include <linux/console.h>
 #endif
 
-extern void mips_reboot_setup(void);
-extern unsigned long mips_rtc_get_time(void);
-
-#ifdef CONFIG_KGDB
-extern void kgdb_config(void);
-#endif
-
 struct resource standard_io_resources[] = {
-        { .name = "dma1", .start = 0x00, .end = 0x1f, .flags = IORESOURCE_BUSY },
-        { .name = "timer", .start = 0x40, .end = 0x5f, .flags = IORESOURCE_BUSY },
-        { .name = "keyboard", .start = 0x60, .end = 0x6f, .flags = IORESOURCE_BUSY },
-        { .name = "dma page reg", .start = 0x80, .end = 0x8f, .flags = IORESOURCE_BUSY },
-        { .name = "dma2", .start = 0xc0, .end = 0xdf, .flags = IORESOURCE_BUSY },
+        {
+                .name = "dma1",
+                .start = 0x00,
+                .end = 0x1f,
+                .flags = IORESOURCE_BUSY
+        },
+        {
+                .name = "timer",
+                .start = 0x40,
+                .end = 0x5f,
+                .flags = IORESOURCE_BUSY
+        },
+        {
+                .name = "keyboard",
+                .start = 0x60,
+                .end = 0x6f,
+                .flags = IORESOURCE_BUSY
+        },
+        {
+                .name = "dma page reg",
+                .start = 0x80,
+                .end = 0x8f,
+                .flags = IORESOURCE_BUSY
+        },
+        {
+                .name = "dma2",
+                .start = 0xc0,
+                .end = 0xdf,
+                .flags = IORESOURCE_BUSY
+        },
 };
 
 const char *get_system_type(void)
@@ -62,7 +81,7 @@ const char display_string[] = "        LINUX ON MALTA       ";
 #endif /* CONFIG_MIPS_MT_SMTC */
 
 #ifdef CONFIG_BLK_DEV_FD
-void __init fd_activate(void)
+static void __init fd_activate(void)
 {
         /*
          * Activate Floppy Controller in the SMSC FDC37M817 Super I/O
@@ -83,6 +102,85 @@ void __init fd_activate(void)
 }
 #endif
 
+#ifdef CONFIG_BLK_DEV_IDE
+static void __init pci_clock_check(void)
+{
+        unsigned int __iomem *jmpr_p =
+                (unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
+        int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
+        static const int pciclocks[] __initdata = {
+                33, 20, 25, 30, 12, 16, 37, 10
+        };
+        int pciclock = pciclocks[jmpr];
+        char *argptr = prom_getcmdline();
+
+        if (pciclock != 33 && !strstr(argptr, "idebus=")) {
+                printk(KERN_WARNING "WARNING: PCI clock is %dMHz, "
+                                "setting idebus\n", pciclock);
+                argptr += strlen(argptr);
+                sprintf(argptr, " idebus=%d", pciclock);
+                if (pciclock < 20 || pciclock > 66)
+                        printk(KERN_WARNING "WARNING: IDE timing "
+                                        "calculations will be incorrect\n");
+        }
+}
+#endif
+
+#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
+static void __init screen_info_setup(void)
+{
+        screen_info = (struct screen_info) {
+                .orig_x = 0,
+                .orig_y = 25,
+                .ext_mem_k = 0,
+                .orig_video_page = 0,
+                .orig_video_mode = 0,
+                .orig_video_cols = 80,
+                .unused2 = 0,
+                .orig_video_ega_bx = 0,
+                .unused3 = 0,
+                .orig_video_lines = 25,
+                .orig_video_isVGA = VIDEO_TYPE_VGAC,
+                .orig_video_points = 16
+        };
+}
+#endif
+
+static void __init bonito_quirks_setup(void)
+{
+        char *argptr;
+
+        argptr = prom_getcmdline();
+        if (strstr(argptr, "debug")) {
+                BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
+                printk(KERN_INFO "Enabled Bonito debug mode\n");
+        } else
+                BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
+
+#ifdef CONFIG_DMA_COHERENT
+        if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
+                BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
+                printk(KERN_INFO "Enabled Bonito CPU coherency\n");
+
+                argptr = prom_getcmdline();
+                if (strstr(argptr, "iobcuncached")) {
+                        BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
+                        BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
+                                ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
+                                        BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
+                        printk(KERN_INFO "Disabled Bonito IOBC coherency\n");
+                } else {
+                        BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
+                        BONITO_PCIMEMBASECFG |=
+                                (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
+                                        BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
+                        printk(KERN_INFO "Enabled Bonito IOBC coherency\n");
+                }
+        } else
+                panic("Hardware DMA cache coherency not supported");
+#endif
+}
+
 void __init plat_mem_setup(void)
 {
         unsigned int i;
@@ -102,86 +200,24 @@ void __init plat_mem_setup(void)
         kgdb_config();
 #endif
 
-        if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO) {
-                char *argptr;
-
-                argptr = prom_getcmdline();
-                if (strstr(argptr, "debug")) {
-                        BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
-                        printk("Enabled Bonito debug mode\n");
-                }
-                else
-                        BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
-
-#ifdef CONFIG_DMA_COHERENT
-                if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
-                        BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
-                        printk("Enabled Bonito CPU coherency\n");
-
-                        argptr = prom_getcmdline();
-                        if (strstr(argptr, "iobcuncached")) {
-                                BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
-                                BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
-                                        ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
-                                          BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
-                                printk("Disabled Bonito IOBC coherency\n");
-                        }
-                        else {
-                                BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
-                                BONITO_PCIMEMBASECFG |=
-                                        (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
-                                         BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
-                                printk("Enabled Bonito IOBC coherency\n");
-                        }
-                }
-                else
-                        panic("Hardware DMA cache coherency not supported");
-
-#endif
-        }
 #ifdef CONFIG_DMA_COHERENT
-        else {
+        if (mips_revision_sconid != MIPS_REVISION_SCON_BONITO)
                 panic("Hardware DMA cache coherency not supported");
-        }
 #endif
 
+        if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO)
+                bonito_quirks_setup();
+
 #ifdef CONFIG_BLK_DEV_IDE
-        /* Check PCI clock */
-        {
-                unsigned int __iomem *jmpr_p = (unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
-                int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
-                static const int pciclocks[] __initdata = {
-                        33, 20, 25, 30, 12, 16, 37, 10
-                };
-                int pciclock = pciclocks[jmpr];
-                char *argptr = prom_getcmdline();
-
-                if (pciclock != 33 && !strstr (argptr, "idebus=")) {
-                        printk("WARNING: PCI clock is %dMHz, setting idebus\n", pciclock);
-                        argptr += strlen(argptr);
-                        sprintf(argptr, " idebus=%d", pciclock);
-                        if (pciclock < 20 || pciclock > 66)
-                                printk("WARNING: IDE timing calculations will be incorrect\n");
-                }
-        }
+        pci_clock_check();
 #endif
+
 #ifdef CONFIG_BLK_DEV_FD
         fd_activate();
 #endif
-#ifdef CONFIG_VT
-#if defined(CONFIG_VGA_CONSOLE)
-        screen_info = (struct screen_info) {
-                0, 25,                  /* orig-x, orig-y */
-                0,                      /* unused */
-                0,                      /* orig-video-page */
-                0,                      /* orig-video-mode */
-                80,                     /* orig-video-cols */
-                0, 0, 0,                /* ega_ax, ega_bx, ega_cx */
-                25,                     /* orig-video-lines */
-                VIDEO_TYPE_VGAC,        /* orig-video-isVGA */
-                16                      /* orig-video-points */
-        };
-#endif
+
+#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
+        screen_info_setup();
 #endif
         mips_reboot_setup();
 }
diff --git a/arch/mips/mips-boards/malta/malta_smtc.c b/arch/mips/mips-boards/malta/malta_smtc.c
index 5c980f4a48fe..5ea705e49454 100644
--- a/arch/mips/mips-boards/malta/malta_smtc.c
+++ b/arch/mips/mips-boards/malta/malta_smtc.c
@@ -15,28 +15,26 @@
  * Cause the specified action to be performed on a targeted "CPU"
  */
 
-void core_send_ipi(int cpu, unsigned int action)
+static void msmtc_send_ipi_single(int cpu, unsigned int action)
 {
         /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
         smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
 }
 
-/*
- * Platform "CPU" startup hook
- */
-
-void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
+static void msmtc_send_ipi_mask(cpumask_t mask, unsigned int action)
 {
-        smtc_boot_secondary(cpu, idle);
+        unsigned int i;
+
+        for_each_cpu_mask(i, mask)
+                msmtc_send_ipi_single(i, action);
 }
 
 /*
  * Post-config but pre-boot cleanup entry point
  */
-
-void __cpuinit prom_init_secondary(void)
+static void __cpuinit msmtc_init_secondary(void)
 {
-        void smtc_init_secondary(void);
+        void smtc_init_secondary(void);
         int myvpe;
 
         /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
@@ -50,45 +48,61 @@ void __cpuinit prom_init_secondary(void)
                         set_c0_status(0x100 << cp0_perfcount_irq);
         }
 
-        smtc_init_secondary();
+        smtc_init_secondary();
 }
 
 /*
- * Platform SMP pre-initialization
- *
- * As noted above, we can assume a single CPU for now
- * but it may be multithreaded.
+ * Platform "CPU" startup hook
  */
-
-void __cpuinit plat_smp_setup(void)
+static void __cpuinit msmtc_boot_secondary(int cpu, struct task_struct *idle)
 {
-        if (read_c0_config3() & (1<<2))
-                mipsmt_build_cpu_map(0);
+        smtc_boot_secondary(cpu, idle);
 }
 
-void __init plat_prepare_cpus(unsigned int max_cpus)
+/*
+ * SMP initialization finalization entry point
+ */
+static void __cpuinit msmtc_smp_finish(void)
 {
-        if (read_c0_config3() & (1<<2))
-                mipsmt_prepare_cpus();
+        smtc_smp_finish();
 }
 
 /*
- * SMP initialization finalization entry point
+ * Hook for after all CPUs are online
  */
 
-void __cpuinit prom_smp_finish(void)
+static void msmtc_cpus_done(void)
 {
-        smtc_smp_finish();
 }
 
 /*
- * Hook for after all CPUs are online
+ * Platform SMP pre-initialization
+ *
+ * As noted above, we can assume a single CPU for now
+ * but it may be multithreaded.
  */
 
-void prom_cpus_done(void)
+static void __init msmtc_smp_setup(void)
 {
+        mipsmt_build_cpu_map(0);
 }
 
+static void __init msmtc_prepare_cpus(unsigned int max_cpus)
+{
+        mipsmt_prepare_cpus();
+}
+
+struct plat_smp_ops msmtc_smp_ops = {
+        .send_ipi_single        = msmtc_send_ipi_single,
+        .send_ipi_mask          = msmtc_send_ipi_mask,
+        .init_secondary         = msmtc_init_secondary,
+        .smp_finish             = msmtc_smp_finish,
+        .cpus_done              = msmtc_cpus_done,
+        .boot_secondary         = msmtc_boot_secondary,
+        .smp_setup              = msmtc_smp_setup,
+        .prepare_cpus           = msmtc_prepare_cpus,
+};
+
 #ifdef CONFIG_MIPS_MT_SMTC_IRQAFF
 /*
  * IRQ affinity hook
diff --git a/arch/mips/mips-boards/sead/sead_setup.c b/arch/mips/mips-boards/sead/sead_setup.c
index 1fb61b852304..8aa8e5b7b074 100644
--- a/arch/mips/mips-boards/sead/sead_setup.c
+++ b/arch/mips/mips-boards/sead/sead_setup.c
@@ -34,8 +34,6 @@
 #include <asm/mips-boards/seadint.h>
 #include <asm/time.h>
 
-extern void mips_reboot_setup(void);
-
 static void __init serial_init(void);
 
 const char *get_system_type(void)
diff --git a/arch/mips/mipssim/Makefile b/arch/mips/mipssim/Makefile
index 75568b584df4..57f43c1c7882 100644
--- a/arch/mips/mipssim/Makefile
+++ b/arch/mips/mipssim/Makefile
@@ -21,6 +21,6 @@ obj-y := sim_platform.o sim_setup.o sim_mem.o sim_time.o sim_int.o \
          sim_cmdline.o
 
 obj-$(CONFIG_EARLY_PRINTK) += sim_console.o
-obj-$(CONFIG_SMP) += sim_smp.o
+obj-$(CONFIG_MIPS_MT_SMTC) += sim_smtc.o
 
 EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/mipssim/sim_setup.c b/arch/mips/mipssim/sim_setup.c
index 452c129d02c1..d49fe73426b7 100644
--- a/arch/mips/mipssim/sim_setup.c
+++ b/arch/mips/mipssim/sim_setup.c
@@ -60,6 +60,8 @@ void __init plat_mem_setup(void)
 #endif
 }
 
+extern struct plat_smp_ops ssmtc_smp_ops;
+
 void __init prom_init(void)
 {
         set_io_port_base(0xbfd00000);
@@ -67,8 +69,20 @@ void __init prom_init(void)
         pr_info("\nLINUX started...\n");
         prom_init_cmdline();
         prom_meminit();
-}
 
+#ifdef CONFIG_MIPS_MT_SMP
+        if (cpu_has_mipsmt)
+                register_smp_ops(&vsmp_smp_ops);
+        else
+                register_smp_ops(&up_smp_ops);
+#endif
+#ifdef CONFIG_MIPS_MT_SMTC
+        if (cpu_has_mipsmt)
+                register_smp_ops(&ssmtc_smp_ops);
+        else
+                register_smp_ops(&up_smp_ops);
+#endif
+}
 
 static void __init serial_init(void)
 {
diff --git a/arch/mips/mipssim/sim_smp.c b/arch/mips/mipssim/sim_smtc.c
index ccbbccac23ef..d6e4f656ad14 100644
--- a/arch/mips/mipssim/sim_smp.c
+++ b/arch/mips/mipssim/sim_smtc.c
@@ -16,7 +16,7 @@
  *
  */
 /*
- * Simulator Platform-specific hooks for SMP operation
+ * Simulator Platform-specific hooks for SMTC operation
  */
 #include <linux/kernel.h>
 #include <linux/sched.h>
@@ -29,65 +29,72 @@
 #include <asm/processor.h>
 #include <asm/system.h>
 #include <asm/mmu_context.h>
-#ifdef CONFIG_MIPS_MT_SMTC
 #include <asm/smtc_ipi.h>
-#endif /* CONFIG_MIPS_MT_SMTC */
 
 /* VPE/SMP Prototype implements platform interfaces directly */
-#if !defined(CONFIG_MIPS_MT_SMP)
 
 /*
  * Cause the specified action to be performed on a targeted "CPU"
  */
 
-void core_send_ipi(int cpu, unsigned int action)
+static void ssmtc_send_ipi_single(int cpu, unsigned int action)
 {
-#ifdef CONFIG_MIPS_MT_SMTC
         smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
-#endif /* CONFIG_MIPS_MT_SMTC */
-/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
+        /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
+}
+
+static inline void ssmtc_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+        unsigned int i;
 
+        for_each_cpu_mask(i, mask)
+                ssmtc_send_ipi_single(i, action);
 }
 
 /*
- * Platform "CPU" startup hook
+ * Post-config but pre-boot cleanup entry point
  */
-
-void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
+static void __cpuinit ssmtc_init_secondary(void)
 {
-#ifdef CONFIG_MIPS_MT_SMTC
-        smtc_boot_secondary(cpu, idle);
-#endif /* CONFIG_MIPS_MT_SMTC */
+        void smtc_init_secondary(void);
+
+        smtc_init_secondary();
 }
 
 /*
- * Post-config but pre-boot cleanup entry point
+ * SMP initialization finalization entry point
  */
+static void __cpuinit ssmtc_smp_finish(void)
+{
+        smtc_smp_finish();
+}
 
-void __cpuinit prom_init_secondary(void)
+/*
+ * Hook for after all CPUs are online
+ */
+static void ssmtc_cpus_done(void)
 {
-#ifdef CONFIG_MIPS_MT_SMTC
-        void smtc_init_secondary(void);
+}
 
-        smtc_init_secondary();
-#endif /* CONFIG_MIPS_MT_SMTC */
+/*
+ * Platform "CPU" startup hook
+ */
+static void __cpuinit ssmtc_boot_secondary(int cpu, struct task_struct *idle)
+{
+        smtc_boot_secondary(cpu, idle);
 }
 
-void plat_smp_setup(void)
+static void __init ssmtc_smp_setup(void)
 {
-#ifdef CONFIG_MIPS_MT_SMTC
         if (read_c0_config3() & (1 << 2))
                 mipsmt_build_cpu_map(0);
-#endif /* CONFIG_MIPS_MT_SMTC */
 }
 
 /*
  * Platform SMP pre-initialization
  */
-
-void plat_prepare_cpus(unsigned int max_cpus)
+static void ssmtc_prepare_cpus(unsigned int max_cpus)
 {
-#ifdef CONFIG_MIPS_MT_SMTC
         /*
          * As noted above, we can assume a single CPU for now
          * but it may be multithreaded.
@@ -96,28 +103,15 @@ void plat_prepare_cpus(unsigned int max_cpus)
         if (read_c0_config3() & (1 << 2)) {
                 mipsmt_prepare_cpus();
         }
-#endif /* CONFIG_MIPS_MT_SMTC */
 }
 
-/*
- * SMP initialization finalization entry point
- */
-
-void __cpuinit prom_smp_finish(void)
-{
-#ifdef CONFIG_MIPS_MT_SMTC
-        smtc_smp_finish();
-#endif /* CONFIG_MIPS_MT_SMTC */
-}
-
-/*
- * Hook for after all CPUs are online
- */
-
-void prom_cpus_done(void)
-{
-#ifdef CONFIG_MIPS_MT_SMTC
-
-#endif /* CONFIG_MIPS_MT_SMTC */
-}
-#endif /* CONFIG_MIPS32R2_MT_SMP */
+struct plat_smp_ops ssmtc_smp_ops = {
+        .send_ipi_single        = ssmtc_send_ipi_single,
+        .send_ipi_mask          = ssmtc_send_ipi_mask,
+        .init_secondary         = ssmtc_init_secondary,
+        .smp_finish             = ssmtc_smp_finish,
+        .cpus_done              = ssmtc_cpus_done,
+        .boot_secondary         = ssmtc_boot_secondary,
+        .smp_setup              = ssmtc_smp_setup,
+        .prepare_cpus           = ssmtc_prepare_cpus,
+};
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 9355f1c9325f..02bd180f0e02 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -449,7 +449,7 @@ static inline void local_r4k_flush_cache_page(void *args)
          * If the page isn't marked valid, the page cannot possibly be
          * in the cache.
          */
-        if (!(pte_val(*ptep) & _PAGE_PRESENT))
+        if (!(pte_present(*ptep)))
                 return;
 
         if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID))
@@ -468,8 +468,6 @@ static inline void local_r4k_flush_cache_page(void *args)
 
         if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) {
                 r4k_blast_dcache_page(addr);
-                if (exec && !cpu_icache_snoops_remote_store)
-                        r4k_blast_scache_page(addr);
         }
         if (exec) {
                 if (vaddr && cpu_has_vtag_icache && mm == current->active_mm) {
@@ -533,13 +531,6 @@ static inline void local_r4k_flush_icache_range(void *args)
                         R4600_HIT_CACHEOP_WAR_IMPL;
                         protected_blast_dcache_range(start, end);
                 }
-
-                if (!cpu_icache_snoops_remote_store && scache_size) {
-                        if (end - start > scache_size)
-                                r4k_blast_scache();
-                        else
-                                protected_blast_scache_range(start, end);
-                }
         }
 
         if (end - start > icache_size)
@@ -598,7 +589,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
                 if (size >= scache_size)
                         r4k_blast_scache();
                 else
-                        blast_scache_range(addr, addr + size);
+                        blast_inv_scache_range(addr, addr + size);
                 return;
         }
 
@@ -606,7 +597,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
                 r4k_blast_dcache();
         } else {
                 R4600_HIT_CACHEOP_WAR_IMPL;
-                blast_dcache_range(addr, addr + size);
+                blast_inv_dcache_range(addr, addr + size);
         }
 
         bc_inv(addr, size);
@@ -989,6 +980,8 @@ static void __init probe_pcache(void)
         case CPU_AU1100:
         case CPU_AU1550:
         case CPU_AU1200:
+        case CPU_AU1210:
+        case CPU_AU1250:
                 c->icache.flags |= MIPS_CACHE_IC_F_DC;
                 break;
         }
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 810535dd091b..ae39dd88b9aa 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -383,7 +383,7 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
         BUG_ON(direction == DMA_NONE);
 
         if (!plat_device_is_coherent(dev))
-                dma_cache_wback_inv((unsigned long)vaddr, size);
+                __dma_sync((unsigned long)vaddr, size, direction);
 }
 
 EXPORT_SYMBOL(dma_cache_sync);
diff --git a/arch/mips/mm/pg-r4k.c b/arch/mips/mm/pg-r4k.c
index 4f770ac885ce..9185fbf37c0d 100644
--- a/arch/mips/mm/pg-r4k.c
+++ b/arch/mips/mm/pg-r4k.c
@@ -4,6 +4,7 @@
  * for more details.
  *
  * Copyright (C) 2003, 04, 05 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2007  Maciej W. Rozycki
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -12,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/proc_fs.h>
 
+#include <asm/bugs.h>
 #include <asm/cacheops.h>
 #include <asm/inst.h>
 #include <asm/io.h>
@@ -255,64 +257,58 @@ static inline void build_store_reg(int reg)
         __build_store_reg(reg);
 }
 
-static inline void build_addiu_a2_a0(unsigned long offset)
+static inline void build_addiu_rt_rs(unsigned int rt, unsigned int rs,
+                                     unsigned long offset)
 {
         union mips_instruction mi;
 
         BUG_ON(offset > 0x7fff);
 
-        mi.i_format.opcode     = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
-        mi.i_format.rs         = 4;             /* $a0 */
-        mi.i_format.rt         = 6;             /* $a2 */
-        mi.i_format.simmediate = offset;
+        if (cpu_has_64bit_gp_regs && DADDI_WAR && r4k_daddiu_bug()) {
+                mi.i_format.opcode     = addiu_op;
+                mi.i_format.rs         = 0;     /* $zero */
+                mi.i_format.rt         = 25;    /* $t9 */
+                mi.i_format.simmediate = offset;
+                emit_instruction(mi);
 
+                mi.r_format.opcode     = spec_op;
+                mi.r_format.rs         = rs;
+                mi.r_format.rt         = 25;    /* $t9 */
+                mi.r_format.rd         = rt;
+                mi.r_format.re         = 0;
+                mi.r_format.func       = daddu_op;
+        } else {
+                mi.i_format.opcode     = cpu_has_64bit_gp_regs ?
+                                         daddiu_op : addiu_op;
+                mi.i_format.rs         = rs;
+                mi.i_format.rt         = rt;
+                mi.i_format.simmediate = offset;
+        }
         emit_instruction(mi);
 }
 
-static inline void build_addiu_a2(unsigned long offset)
+static inline void build_addiu_a2_a0(unsigned long offset)
 {
-        union mips_instruction mi;
-
-        BUG_ON(offset > 0x7fff);
-
-        mi.i_format.opcode     = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
-        mi.i_format.rs         = 6;             /* $a2 */
-        mi.i_format.rt         = 6;             /* $a2 */
-        mi.i_format.simmediate = offset;
+        build_addiu_rt_rs(6, 4, offset);        /* $a2, $a0, offset */
+}
 
-        emit_instruction(mi);
+static inline void build_addiu_a2(unsigned long offset)
+{
+        build_addiu_rt_rs(6, 6, offset);        /* $a2, $a2, offset */
 }
 
 static inline void build_addiu_a1(unsigned long offset)
 {
-        union mips_instruction mi;
-
-        BUG_ON(offset > 0x7fff);
-
-        mi.i_format.opcode     = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
-        mi.i_format.rs         = 5;             /* $a1 */
-        mi.i_format.rt         = 5;             /* $a1 */
-        mi.i_format.simmediate = offset;
+        build_addiu_rt_rs(5, 5, offset);        /* $a1, $a1, offset */
 
         load_offset -= offset;
-
-        emit_instruction(mi);
 }
 
 static inline void build_addiu_a0(unsigned long offset)
 {
-        union mips_instruction mi;
-
-        BUG_ON(offset > 0x7fff);
-
-        mi.i_format.opcode     = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
-        mi.i_format.rs         = 4;             /* $a0 */
-        mi.i_format.rt         = 4;             /* $a0 */
-        mi.i_format.simmediate = offset;
+        build_addiu_rt_rs(4, 4, offset);        /* $a0, $a0, offset */
 
         store_offset -= offset;
-
-        emit_instruction(mi);
 }
 
 static inline void build_bne(unsigned int *dest)
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index a61246d3533d..d026302e0ecc 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -6,7 +6,7 @@
  * Synthesize TLB refill handlers at runtime.
  *
  * Copyright (C) 2004,2005,2006 by Thiemo Seufer
- * Copyright (C) 2005  Maciej W. Rozycki
+ * Copyright (C) 2005, 2007  Maciej W. Rozycki
  * Copyright (C) 2006  Ralf Baechle (ralf@linux-mips.org)
  *
  * ... and the days got worse and worse and now you see
@@ -19,20 +19,15 @@
  * (Condolences to Napoleon XIV)
  */
 
-#include <stdarg.h>
-
-#include <linux/mm.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/init.h>
 
-#include <asm/pgtable.h>
-#include <asm/cacheflush.h>
+#include <asm/bugs.h>
 #include <asm/mmu_context.h>
 #include <asm/inst.h>
 #include <asm/elf.h>
-#include <asm/smp.h>
 #include <asm/war.h>
 
 static inline int r45k_bvahwbug(void)
@@ -66,7 +61,7 @@ static inline int __maybe_unused r10000_llsc_war(void)
  * why; it's not an issue caused by the core RTL.
  *
  */
-static __init int __attribute__((unused)) m4kc_tlbp_war(void)
+static int __init m4kc_tlbp_war(void)
 {
         return (current_cpu_data.processor_id & 0xffff00) ==
                (PRID_COMP_MIPS | PRID_IMP_4KC);
@@ -140,7 +135,7 @@ struct insn {
          | (e) << RE_SH                                         \
          | (f) << FUNC_SH)
 
-static __initdata struct insn insn_table[] = {
+static struct insn insn_table[] __initdata = {
         { insn_addiu, M(addiu_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
         { insn_addu, M(spec_op, 0, 0, 0, 0, addu_op), RS | RT | RD },
         { insn_and, M(spec_op, 0, 0, 0, 0, and_op), RS | RT | RD },
@@ -193,7 +188,7 @@ static __initdata struct insn insn_table[] = {
 
 #undef M
 
-static __init u32 build_rs(u32 arg)
+static u32 __init build_rs(u32 arg)
 {
         if (arg & ~RS_MASK)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -201,7 +196,7 @@ static __init u32 build_rs(u32 arg)
         return (arg & RS_MASK) << RS_SH;
 }
 
-static __init u32 build_rt(u32 arg)
+static u32 __init build_rt(u32 arg)
 {
         if (arg & ~RT_MASK)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -209,7 +204,7 @@ static __init u32 build_rt(u32 arg)
         return (arg & RT_MASK) << RT_SH;
 }
 
-static __init u32 build_rd(u32 arg)
+static u32 __init build_rd(u32 arg)
 {
         if (arg & ~RD_MASK)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -217,7 +212,7 @@ static __init u32 build_rd(u32 arg)
         return (arg & RD_MASK) << RD_SH;
 }
 
-static __init u32 build_re(u32 arg)
+static u32 __init build_re(u32 arg)
 {
         if (arg & ~RE_MASK)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -225,7 +220,7 @@ static __init u32 build_re(u32 arg)
         return (arg & RE_MASK) << RE_SH;
 }
 
-static __init u32 build_simm(s32 arg)
+static u32 __init build_simm(s32 arg)
 {
         if (arg > 0x7fff || arg < -0x8000)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -233,7 +228,7 @@ static __init u32 build_simm(s32 arg)
         return arg & 0xffff;
 }
 
-static __init u32 build_uimm(u32 arg)
+static u32 __init build_uimm(u32 arg)
 {
         if (arg & ~IMM_MASK)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -241,7 +236,7 @@ static __init u32 build_uimm(u32 arg)
         return arg & IMM_MASK;
 }
 
-static __init u32 build_bimm(s32 arg)
+static u32 __init build_bimm(s32 arg)
 {
         if (arg > 0x1ffff || arg < -0x20000)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -252,7 +247,7 @@ static __init u32 build_bimm(s32 arg)
         return ((arg < 0) ? (1 << 15) : 0) | ((arg >> 2) & 0x7fff);
 }
 
-static __init u32 build_jimm(u32 arg)
+static u32 __init build_jimm(u32 arg)
 {
         if (arg & ~((JIMM_MASK) << 2))
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -260,7 +255,7 @@ static __init u32 build_jimm(u32 arg)
         return (arg >> 2) & JIMM_MASK;
 }
 
-static __init u32 build_func(u32 arg)
+static u32 __init build_func(u32 arg)
 {
         if (arg & ~FUNC_MASK)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -268,7 +263,7 @@ static __init u32 build_func(u32 arg)
         return arg & FUNC_MASK;
 }
 
-static __init u32 build_set(u32 arg)
+static u32 __init build_set(u32 arg)
 {
         if (arg & ~SET_MASK)
                 printk(KERN_WARNING "TLB synthesizer field overflow\n");
@@ -293,7 +288,7 @@ static void __init build_insn(u32 **buf, enum opcode opc, ...)
                         break;
                 }
 
-        if (!ip)
+        if (!ip || (opc == insn_daddiu && r4k_daddiu_bug()))
                 panic("Unsupported TLB synthesizer instruction %d", opc);
 
         op = ip->match;
@@ -315,69 +310,69 @@ static void __init build_insn(u32 **buf, enum opcode opc, ...)
 }
 
 #define I_u1u2u3(op)                                            \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 unsigned int b, unsigned int c)                 \
         {                                                       \
                 build_insn(buf, insn##op, a, b, c);             \
         }
 
 #define I_u2u1u3(op)                                            \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 unsigned int b, unsigned int c)                 \
         {                                                       \
                 build_insn(buf, insn##op, b, a, c);             \
         }
 
 #define I_u3u1u2(op)                                            \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 unsigned int b, unsigned int c)                 \
         {                                                       \
                 build_insn(buf, insn##op, b, c, a);             \
         }
 
 #define I_u1u2s3(op)                                            \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 unsigned int b, signed int c)                   \
         {                                                       \
                 build_insn(buf, insn##op, a, b, c);             \
         }
 
 #define I_u2s3u1(op)                                            \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 signed int b, unsigned int c)                   \
         {                                                       \
                 build_insn(buf, insn##op, c, a, b);             \
         }
 
 #define I_u2u1s3(op)                                            \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 unsigned int b, signed int c)                   \
         {                                                       \
                 build_insn(buf, insn##op, b, a, c);             \
         }
 
 #define I_u1u2(op)                                              \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 unsigned int b)                                 \
         {                                                       \
                 build_insn(buf, insn##op, a, b);                \
         }
 
 #define I_u1s2(op)                                              \
-        static inline void __init i##op(u32 **buf, unsigned int a,      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a, \
                 signed int b)                                   \
         {                                                       \
                 build_insn(buf, insn##op, a, b);                \
         }
 
 #define I_u1(op)                                                \
-        static inline void __init i##op(u32 **buf, unsigned int a)      \
+        static void __init __maybe_unused i##op(u32 **buf, unsigned int a) \
         {                                                       \
                 build_insn(buf, insn##op, a);                   \
         }
 
 #define I_0(op)                                                 \
-        static inline void __init i##op(u32 **buf)              \
+        static void __init __maybe_unused i##op(u32 **buf)      \
         {                                                       \
                 build_insn(buf, insn##op);                      \
         }
@@ -457,7 +452,7 @@ struct label {
         enum label_id lab;
 };
 
-static __init void build_label(struct label **lab, u32 *addr,
+static void __init build_label(struct label **lab, u32 *addr,
                                enum label_id l)
 {
         (*lab)->addr = addr;
@@ -466,7 +461,7 @@ static __init void build_label(struct label **lab, u32 *addr,
 }
 
 #define L_LA(lb)                                                \
-        static inline void l##lb(struct label **lab, u32 *addr) \
+        static inline void __init l##lb(struct label **lab, u32 *addr) \
         {                                                       \
                 build_label(lab, addr, label##lb);              \
         }
@@ -525,37 +520,46 @@ L_LA(_r3000_write_probe_fail)
 #define i_ssnop(buf) i_sll(buf, 0, 0, 1)
 #define i_ehb(buf) i_sll(buf, 0, 0, 3)
 
-#ifdef CONFIG_64BIT
-static __init int __maybe_unused in_compat_space_p(long addr)
+static int __init __maybe_unused in_compat_space_p(long addr)
 {
         /* Is this address in 32bit compat space? */
+#ifdef CONFIG_64BIT
         return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L);
+#else
+        return 1;
+#endif
 }
 
-static __init int __maybe_unused rel_highest(long val)
+static int __init __maybe_unused rel_highest(long val)
 {
+#ifdef CONFIG_64BIT
         return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000;
+#else
+        return 0;
+#endif
 }
 
-static __init int __maybe_unused rel_higher(long val)
+static int __init __maybe_unused rel_higher(long val)
 {
+#ifdef CONFIG_64BIT
         return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000;
-}
+#else
+        return 0;
 #endif
+}
 
-static __init int rel_hi(long val)
+static int __init rel_hi(long val)
 {
         return ((((val + 0x8000L) >> 16) & 0xffff) ^ 0x8000) - 0x8000;
 }
 
-static __init int rel_lo(long val)
+static int __init rel_lo(long val)
 {
         return ((val & 0xffff) ^ 0x8000) - 0x8000;
 }
 
-static __init void i_LA_mostly(u32 **buf, unsigned int rs, long addr)
+static void __init i_LA_mostly(u32 **buf, unsigned int rs, long addr)
 {
-#ifdef CONFIG_64BIT
         if (!in_compat_space_p(addr)) {
                 i_lui(buf, rs, rel_highest(addr));
                 if (rel_higher(addr))
@@ -567,16 +571,18 @@ static __init void i_LA_mostly(u32 **buf, unsigned int rs, long addr)
                 } else
                         i_dsll32(buf, rs, rs, 0);
         } else
-#endif
                 i_lui(buf, rs, rel_hi(addr));
 }
 
-static __init void __maybe_unused i_LA(u32 **buf, unsigned int rs,
-                                             long addr)
+static void __init __maybe_unused i_LA(u32 **buf, unsigned int rs, long addr)
 {
         i_LA_mostly(buf, rs, addr);
-        if (rel_lo(addr))
-                i_ADDIU(buf, rs, rs, rel_lo(addr));
+        if (rel_lo(addr)) {
+                if (!in_compat_space_p(addr))
+                        i_daddiu(buf, rs, rs, rel_lo(addr));
+                else
+                        i_addiu(buf, rs, rs, rel_lo(addr));
+        }
 }
 
 /*
@@ -589,7 +595,7 @@ struct reloc {
         enum label_id lab;
 };
 
-static __init void r_mips_pc16(struct reloc **rel, u32 *addr,
+static void __init r_mips_pc16(struct reloc **rel, u32 *addr,
                                enum label_id l)
 {
         (*rel)->addr = addr;
@@ -614,7 +620,7 @@ static inline void __resolve_relocs(struct reloc *rel, struct label *lab)
         }
 }
 
-static __init void resolve_relocs(struct reloc *rel, struct label *lab)
+static void __init resolve_relocs(struct reloc *rel, struct label *lab)
 {
         struct label *l;
 
@@ -624,7 +630,7 @@ static __init void resolve_relocs(struct reloc *rel, struct label *lab)
                                 __resolve_relocs(rel, l);
 }
 
-static __init void move_relocs(struct reloc *rel, u32 *first, u32 *end,
+static void __init move_relocs(struct reloc *rel, u32 *first, u32 *end,
                                long off)
 {
         for (; rel->lab != label_invalid; rel++)
@@ -632,7 +638,7 @@ static __init void move_relocs(struct reloc *rel, u32 *first, u32 *end,
                         rel->addr += off;
 }
 
-static __init void move_labels(struct label *lab, u32 *first, u32 *end,
+static void __init move_labels(struct label *lab, u32 *first, u32 *end,
                                long off)
 {
         for (; lab->lab != label_invalid; lab++)
@@ -640,7 +646,7 @@ static __init void move_labels(struct label *lab, u32 *first, u32 *end,
                         lab->addr += off;
 }
 
-static __init void copy_handler(struct reloc *rel, struct label *lab,
+static void __init copy_handler(struct reloc *rel, struct label *lab,
                                 u32 *first, u32 *end, u32 *target)
 {
         long off = (long)(target - first);
@@ -651,7 +657,7 @@ static __init void copy_handler(struct reloc *rel, struct label *lab,
         move_labels(lab, first, end, off);
 }
 
-static __init int __maybe_unused insn_has_bdelay(struct reloc *rel,
+static int __init __maybe_unused insn_has_bdelay(struct reloc *rel,
                                                        u32 *addr)
 {
         for (; rel->lab != label_invalid; rel++) {
@@ -714,6 +720,22 @@ il_bgez(u32 **p, struct reloc **r, unsigned int reg, enum label_id l)
         i_bgez(p, reg, 0);
 }
 
+/*
+ * For debug purposes.
+ */
+static inline void dump_handler(const u32 *handler, int count)
+{
+        int i;
+
+        pr_debug("\t.set push\n");
+        pr_debug("\t.set noreorder\n");
+
+        for (i = 0; i < count; i++)
+                pr_debug("\t%p\t.word 0x%08x\n", &handler[i], handler[i]);
+
+        pr_debug("\t.set pop\n");
+}
+
 /* The only general purpose registers allowed in TLB handlers. */
 #define K0              26
 #define K1              27
@@ -743,11 +765,11 @@ il_bgez(u32 **p, struct reloc **r, unsigned int reg, enum label_id l)
  * We deliberately chose a buffer size of 128, so we won't scribble
  * over anything important on overflow before we panic.
  */
-static __initdata u32 tlb_handler[128];
+static u32 tlb_handler[128] __initdata;
 
 /* simply assume worst case size for labels and relocs */
-static __initdata struct label labels[128];
-static __initdata struct reloc relocs[128];
+static struct label labels[128] __initdata;
+static struct reloc relocs[128] __initdata;
 
 /*
  * The R3000 TLB handler is simple.
@@ -756,7 +778,6 @@ static void __init build_r3000_tlb_refill_handler(void)
 {
         long pgdc = (long)pgd_current;
         u32 *p;
-        int i;
 
         memset(tlb_handler, 0, sizeof(tlb_handler));
         p = tlb_handler;
@@ -785,13 +806,9 @@ static void __init build_r3000_tlb_refill_handler(void)
         pr_info("Synthesized TLB refill handler (%u instructions).\n",
                 (unsigned int)(p - tlb_handler));
 
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < (p - tlb_handler); i++)
-                pr_debug("\t.word 0x%08x\n", tlb_handler[i]);
-        pr_debug("\t.set pop\n");
-
         memcpy((void *)ebase, tlb_handler, 0x80);
+
+        dump_handler((u32 *)ebase, 32);
 }
 
 /*
@@ -801,7 +818,7 @@ static void __init build_r3000_tlb_refill_handler(void)
  * other one.To keep things simple, we first assume linear space,
  * then we relocate it to the final handler layout as needed.
  */
-static __initdata u32 final_handler[64];
+static u32 final_handler[64] __initdata;
 
 /*
  * Hazards
@@ -825,7 +842,7 @@ static __initdata u32 final_handler[64];
  *
  * As if we MIPS hackers wouldn't know how to nop pipelines happy ...
  */
-static __init void __maybe_unused build_tlb_probe_entry(u32 **p)
+static void __init __maybe_unused build_tlb_probe_entry(u32 **p)
 {
         switch (current_cpu_type()) {
         /* Found by experiment: R4600 v2.0 needs this, too.  */
@@ -849,7 +866,7 @@ static __init void __maybe_unused build_tlb_probe_entry(u32 **p)
  */
 enum tlb_write_entry { tlb_random, tlb_indexed };
 
-static __init void build_tlb_write_entry(u32 **p, struct label **l,
+static void __init build_tlb_write_entry(u32 **p, struct label **l,
                                          struct reloc **r,
                                          enum tlb_write_entry wmode)
 {
@@ -860,6 +877,12 @@ static __init void build_tlb_write_entry(u32 **p, struct label **l,
         case tlb_indexed: tlbw = i_tlbwi; break;
         }
 
+        if (cpu_has_mips_r2) {
+                i_ehb(p);
+                tlbw(p);
+                return;
+        }
+
         switch (current_cpu_type()) {
         case CPU_R4000PC:
         case CPU_R4000SC:
@@ -894,6 +917,8 @@ static __init void build_tlb_write_entry(u32 **p, struct label **l,
         case CPU_AU1500:
         case CPU_AU1550:
         case CPU_AU1200:
+        case CPU_AU1210:
+        case CPU_AU1250:
         case CPU_PR4450:
                 i_nop(p);
                 tlbw(p);
@@ -935,14 +960,6 @@ static __init void build_tlb_write_entry(u32 **p, struct label **l,
                 tlbw(p);
                 break;
 
-        case CPU_4KEC:
-        case CPU_24K:
-        case CPU_34K:
-        case CPU_74K:
-                i_ehb(p);
-                tlbw(p);
-                break;
-
         case CPU_RM9000:
                 /*
                  * When the JTLB is updated by tlbwi or tlbwr, a subsequent
@@ -993,7 +1010,7 @@ static __init void build_tlb_write_entry(u32 **p, struct label **l,
  * TMP and PTR are scratch.
  * TMP will be clobbered, PTR will hold the pmd entry.
  */
-static __init void
+static void __init
 build_get_pmde64(u32 **p, struct label **l, struct reloc **r,
                  unsigned int tmp, unsigned int ptr)
 {
@@ -1054,7 +1071,7 @@ build_get_pmde64(u32 **p, struct label **l, struct reloc **r,
  * BVADDR is the faulting address, PTR is scratch.
  * PTR will hold the pgd for vmalloc.
  */
-static __init void
+static void __init
 build_get_pgd_vmalloc64(u32 **p, struct label **l, struct reloc **r,
                         unsigned int bvaddr, unsigned int ptr)
 {
@@ -1087,7 +1104,10 @@ build_get_pgd_vmalloc64(u32 **p, struct label **l, struct reloc **r,
         } else {
                 i_LA_mostly(p, ptr, modd);
                 il_b(p, r, label_vmalloc_done);
-                i_daddiu(p, ptr, ptr, rel_lo(modd));
+                if (in_compat_space_p(modd))
+                        i_addiu(p, ptr, ptr, rel_lo(modd));
+                else
+                        i_daddiu(p, ptr, ptr, rel_lo(modd));
         }
 
         l_vmalloc(l, *p);
@@ -1108,7 +1128,10 @@ build_get_pgd_vmalloc64(u32 **p, struct label **l, struct reloc **r,
         } else {
                 i_LA_mostly(p, ptr, swpd);
                 il_b(p, r, label_vmalloc_done);
-                i_daddiu(p, ptr, ptr, rel_lo(swpd));
+                if (in_compat_space_p(swpd))
+                        i_addiu(p, ptr, ptr, rel_lo(swpd));
+                else
+                        i_daddiu(p, ptr, ptr, rel_lo(swpd));
         }
 }
 
@@ -1118,7 +1141,7 @@ build_get_pgd_vmalloc64(u32 **p, struct label **l, struct reloc **r,
  * TMP and PTR are scratch.
  * TMP will be clobbered, PTR will hold the pgd entry.
  */
-static __init void __maybe_unused
+static void __init __maybe_unused
 build_get_pgde32(u32 **p, unsigned int tmp, unsigned int ptr)
 {
         long pgdc = (long)pgd_current;
@@ -1153,7 +1176,7 @@ build_get_pgde32(u32 **p, unsigned int tmp, unsigned int ptr)
 
 #endif /* !CONFIG_64BIT */
 
-static __init void build_adjust_context(u32 **p, unsigned int ctx)
+static void __init build_adjust_context(u32 **p, unsigned int ctx)
 {
         unsigned int shift = 4 - (PTE_T_LOG2 + 1) + PAGE_SHIFT - 12;
         unsigned int mask = (PTRS_PER_PTE / 2 - 1) << (PTE_T_LOG2 + 1);
@@ -1179,7 +1202,7 @@ static __init void build_adjust_context(u32 **p, unsigned int ctx)
         i_andi(p, ctx, ctx, mask);
 }
 
-static __init void build_get_ptep(u32 **p, unsigned int tmp, unsigned int ptr)
+static void __init build_get_ptep(u32 **p, unsigned int tmp, unsigned int ptr)
 {
         /*
          * Bug workaround for the Nevada. It seems as if under certain
@@ -1204,7 +1227,7 @@ static __init void build_get_ptep(u32 **p, unsigned int tmp, unsigned int ptr)
         i_ADDU(p, ptr, ptr, tmp); /* add in offset */
 }
 
-static __init void build_update_entries(u32 **p, unsigned int tmp,
+static void __init build_update_entries(u32 **p, unsigned int tmp,
                                         unsigned int ptep)
 {
         /*
@@ -1254,7 +1277,6 @@ static void __init build_r4000_tlb_refill_handler(void)
         struct reloc *r = relocs;
         u32 *f;
         unsigned int final_len;
-        int i;
 
         memset(tlb_handler, 0, sizeof(tlb_handler));
         memset(labels, 0, sizeof(labels));
@@ -1356,20 +1378,9 @@ static void __init build_r4000_tlb_refill_handler(void)
         pr_info("Synthesized TLB refill handler (%u instructions).\n",
                 final_len);
 
-        f = final_handler;
-#if defined(CONFIG_64BIT) && !defined(CONFIG_CPU_LOONGSON2)
-        if (final_len > 32)
-                final_len = 64;
-        else
-                f = final_handler + 32;
-#endif /* CONFIG_64BIT */
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < final_len; i++)
-                pr_debug("\t.word 0x%08x\n", f[i]);
-        pr_debug("\t.set pop\n");
-
         memcpy((void *)ebase, final_handler, 0x100);
+
+        dump_handler((u32 *)ebase, 64);
 }
 
 /*
@@ -1381,18 +1392,15 @@ static void __init build_r4000_tlb_refill_handler(void)
 extern void tlb_do_page_fault_0(void);
 extern void tlb_do_page_fault_1(void);
 
-#define __tlb_handler_align \
-        __attribute__((__aligned__(1 << CONFIG_MIPS_L1_CACHE_SHIFT)))
-
 /*
  * 128 instructions for the fastpath handler is generous and should
  * never be exceeded.
  */
 #define FASTPATH_SIZE 128
 
-u32 __tlb_handler_align handle_tlbl[FASTPATH_SIZE];
-u32 __tlb_handler_align handle_tlbs[FASTPATH_SIZE];
-u32 __tlb_handler_align handle_tlbm[FASTPATH_SIZE];
+u32 handle_tlbl[FASTPATH_SIZE] __cacheline_aligned;
+u32 handle_tlbs[FASTPATH_SIZE] __cacheline_aligned;
+u32 handle_tlbm[FASTPATH_SIZE] __cacheline_aligned;
 
 static void __init
 iPTE_LW(u32 **p, struct label **l, unsigned int pte, unsigned int ptr)
@@ -1600,7 +1608,6 @@ static void __init build_r3000_tlb_load_handler(void)
         u32 *p = handle_tlbl;
         struct label *l = labels;
         struct reloc *r = relocs;
-        int i;
 
         memset(handle_tlbl, 0, sizeof(handle_tlbl));
         memset(labels, 0, sizeof(labels));
@@ -1623,11 +1630,7 @@ static void __init build_r3000_tlb_load_handler(void)
         pr_info("Synthesized TLB load handler fastpath (%u instructions).\n",
                 (unsigned int)(p - handle_tlbl));
 
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < (p - handle_tlbl); i++)
-                pr_debug("\t.word 0x%08x\n", handle_tlbl[i]);
-        pr_debug("\t.set pop\n");
+        dump_handler(handle_tlbl, ARRAY_SIZE(handle_tlbl));
 }
 
 static void __init build_r3000_tlb_store_handler(void)
@@ -1635,7 +1638,6 @@ static void __init build_r3000_tlb_store_handler(void)
         u32 *p = handle_tlbs;
         struct label *l = labels;
         struct reloc *r = relocs;
-        int i;
 
         memset(handle_tlbs, 0, sizeof(handle_tlbs));
         memset(labels, 0, sizeof(labels));
@@ -1658,11 +1660,7 @@ static void __init build_r3000_tlb_store_handler(void)
         pr_info("Synthesized TLB store handler fastpath (%u instructions).\n",
                 (unsigned int)(p - handle_tlbs));
 
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < (p - handle_tlbs); i++)
-                pr_debug("\t.word 0x%08x\n", handle_tlbs[i]);
-        pr_debug("\t.set pop\n");
+        dump_handler(handle_tlbs, ARRAY_SIZE(handle_tlbs));
 }
 
 static void __init build_r3000_tlb_modify_handler(void)
@@ -1670,7 +1668,6 @@ static void __init build_r3000_tlb_modify_handler(void)
         u32 *p = handle_tlbm;
         struct label *l = labels;
         struct reloc *r = relocs;
-        int i;
 
         memset(handle_tlbm, 0, sizeof(handle_tlbm));
         memset(labels, 0, sizeof(labels));
@@ -1693,11 +1690,7 @@ static void __init build_r3000_tlb_modify_handler(void)
         pr_info("Synthesized TLB modify handler fastpath (%u instructions).\n",
                 (unsigned int)(p - handle_tlbm));
 
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < (p - handle_tlbm); i++)
-                pr_debug("\t.word 0x%08x\n", handle_tlbm[i]);
-        pr_debug("\t.set pop\n");
+        dump_handler(handle_tlbm, ARRAY_SIZE(handle_tlbm));
 }
 
 /*
@@ -1750,7 +1743,6 @@ static void __init build_r4000_tlb_load_handler(void)
         u32 *p = handle_tlbl;
         struct label *l = labels;
         struct reloc *r = relocs;
-        int i;
 
         memset(handle_tlbl, 0, sizeof(handle_tlbl));
         memset(labels, 0, sizeof(labels));
@@ -1783,11 +1775,7 @@ static void __init build_r4000_tlb_load_handler(void)
         pr_info("Synthesized TLB load handler fastpath (%u instructions).\n",
                 (unsigned int)(p - handle_tlbl));
 
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < (p - handle_tlbl); i++)
-                pr_debug("\t.word 0x%08x\n", handle_tlbl[i]);
-        pr_debug("\t.set pop\n");
+        dump_handler(handle_tlbl, ARRAY_SIZE(handle_tlbl));
 }
 
 static void __init build_r4000_tlb_store_handler(void)
@@ -1795,7 +1783,6 @@ static void __init build_r4000_tlb_store_handler(void)
         u32 *p = handle_tlbs;
         struct label *l = labels;
         struct reloc *r = relocs;
-        int i;
 
         memset(handle_tlbs, 0, sizeof(handle_tlbs));
         memset(labels, 0, sizeof(labels));
@@ -1819,11 +1806,7 @@ static void __init build_r4000_tlb_store_handler(void)
         pr_info("Synthesized TLB store handler fastpath (%u instructions).\n",
                 (unsigned int)(p - handle_tlbs));
 
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < (p - handle_tlbs); i++)
-                pr_debug("\t.word 0x%08x\n", handle_tlbs[i]);
-        pr_debug("\t.set pop\n");
+        dump_handler(handle_tlbs, ARRAY_SIZE(handle_tlbs));
 }
 
 static void __init build_r4000_tlb_modify_handler(void)
@@ -1831,7 +1814,6 @@ static void __init build_r4000_tlb_modify_handler(void)
         u32 *p = handle_tlbm;
         struct label *l = labels;
         struct reloc *r = relocs;
-        int i;
 
         memset(handle_tlbm, 0, sizeof(handle_tlbm));
         memset(labels, 0, sizeof(labels));
@@ -1856,11 +1838,7 @@ static void __init build_r4000_tlb_modify_handler(void)
         pr_info("Synthesized TLB modify handler fastpath (%u instructions).\n",
                 (unsigned int)(p - handle_tlbm));
 
-        pr_debug("\t.set push\n");
-        pr_debug("\t.set noreorder\n");
-        for (i = 0; i < (p - handle_tlbm); i++)
-                pr_debug("\t.word 0x%08x\n", handle_tlbm[i]);
-        pr_debug("\t.set pop\n");
+        dump_handler(handle_tlbm, ARRAY_SIZE(handle_tlbm));
 }
 
 void __init build_tlb_refill_handler(void)
diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
index bdfa07aecd97..ccbea229a0e6 100644
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -19,7 +19,7 @@
 #define M_PERFCTL_SUPERVISOR            (1UL      <<  2)
 #define M_PERFCTL_USER                  (1UL      <<  3)
 #define M_PERFCTL_INTERRUPT_ENABLE      (1UL      <<  4)
-#define M_PERFCTL_EVENT(event)          (((event) & 0x3f)  << 5)
+#define M_PERFCTL_EVENT(event)          (((event) & 0x3ff)  << 5)
 #define M_PERFCTL_VPEID(vpe)            ((vpe)    << 16)
 #define M_PERFCTL_MT_EN(filter)         ((filter) << 20)
 #define    M_TC_EN_ALL                  M_PERFCTL_MT_EN(0)
diff --git a/arch/mips/pci/pci-bcm1480.c b/arch/mips/pci/pci-bcm1480.c
index 47f316c86ab1..30ed36125bcd 100644
--- a/arch/mips/pci/pci-bcm1480.c
+++ b/arch/mips/pci/pci-bcm1480.c
@@ -178,8 +178,8 @@ struct pci_ops bcm1480_pci_ops = {
 
 static struct resource bcm1480_mem_resource = {
         .name   = "BCM1480 PCI MEM",
-        .start  = 0x30000000UL,
-        .end    = 0x3fffffffUL,
+        .start  = A_BCM1480_PHYS_PCI_MEM_MATCH_BYTES,
+        .end    = A_BCM1480_PHYS_PCI_MEM_MATCH_BYTES + 0xfffffffUL,
         .flags  = IORESOURCE_MEM,
 };
 
diff --git a/arch/mips/pci/pci-bcm1480ht.c b/arch/mips/pci/pci-bcm1480ht.c
index a63e3bd6b0ac..005e7fecab08 100644
--- a/arch/mips/pci/pci-bcm1480ht.c
+++ b/arch/mips/pci/pci-bcm1480ht.c
@@ -173,8 +173,8 @@ struct pci_ops bcm1480ht_pci_ops = {
 
 static struct resource bcm1480ht_mem_resource = {
         .name   = "BCM1480 HT MEM",
-        .start  = 0x40000000UL,
-        .end    = 0x5fffffffUL,
+        .start  = A_BCM1480_PHYS_HT_MEM_MATCH_BYTES,
+        .end    = A_BCM1480_PHYS_HT_MEM_MATCH_BYTES + 0x1fffffffUL,
         .flags  = IORESOURCE_MEM,
 };
 
diff --git a/arch/mips/philips/pnx8550/common/setup.c b/arch/mips/philips/pnx8550/common/setup.c
index 2ce298f4d19a..92d764c97701 100644
--- a/arch/mips/philips/pnx8550/common/setup.c
+++ b/arch/mips/philips/pnx8550/common/setup.c
@@ -74,7 +74,7 @@ struct resource standard_io_resources[] = {
         },
 };
 
-#define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
+#define STANDARD_IO_RESOURCES ARRAY_SIZE(standard_io_resources)
 
 extern struct resource pci_io_resource;
 extern struct resource pci_mem_resource;
diff --git a/arch/mips/philips/pnx8550/common/time.c b/arch/mips/philips/pnx8550/common/time.c
index 6d494e0de3d9..62f495b57f93 100644
--- a/arch/mips/philips/pnx8550/common/time.c
+++ b/arch/mips/philips/pnx8550/common/time.c
@@ -47,11 +47,6 @@ static struct clocksource pnx_clocksource = {
         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
-static void timer_ack(void)
-{
-        write_c0_compare(cpj);
-}
-
 static irqreturn_t pnx8xxx_timer_interrupt(int irq, void *dev_id)
 {
         struct clock_event_device *c = dev_id;
@@ -94,30 +89,22 @@ static struct clock_event_device pnx8xxx_clockevent = {
         .set_next_event = pnx8xxx_set_next_event,
 };
 
-/*
- * plat_time_init() - it does the following things:
- *
- * 1) plat_time_init() -
- *      a) (optional) set up RTC routines,
- *      b) (optional) calibrate and set the mips_hpt_frequency
- *          (only needed if you intended to use cpu counter as timer interrupt
- *           source)
- */
+static inline void timer_ack(void)
+{
+        write_c0_compare(cpj);
+}
 
 __init void plat_time_init(void)
 {
-        unsigned int             configPR;
-        unsigned int             n;
-        unsigned int             m;
-        unsigned int             p;
-        unsigned int             pow2p;
+        unsigned int configPR;
+        unsigned int n;
+        unsigned int m;
+        unsigned int p;
+        unsigned int pow2p;
 
         clockevents_register_device(&pnx8xxx_clockevent);
         clocksource_register(&pnx_clocksource);
 
-        setup_irq(PNX8550_INT_TIMER1, &pnx8xxx_timer_irq);
-        setup_irq(PNX8550_INT_TIMER2, &monotonic_irqaction);
-
         /* Timer 1 start */
         configPR = read_c0_config7();
         configPR &= ~0x00000008;
@@ -158,6 +145,6 @@ __init void plat_time_init(void)
         write_c0_count2(0);
         write_c0_compare2(0xffffffff);
 
+        setup_irq(PNX8550_INT_TIMER1, &pnx8xxx_timer_irq);
+        setup_irq(PNX8550_INT_TIMER2, &monotonic_irqaction);
 }
-
-
diff --git a/arch/mips/philips/pnx8550/jbs/init.c b/arch/mips/philips/pnx8550/jbs/init.c
index cfd90fa3d799..90b4d35f3ece 100644
--- a/arch/mips/philips/pnx8550/jbs/init.c
+++ b/arch/mips/philips/pnx8550/jbs/init.c
@@ -45,11 +45,8 @@ const char *get_system_type(void)
 
 void __init prom_init(void)
 {
-
         unsigned long memsize;
 
-        mips_machtype = MACH_PHILIPS_JBS;
-
         //memsize = 0x02800000; /* Trimedia uses memory above */
         memsize = 0x08000000; /* Trimedia uses memory above */
         add_memory_region(0, memsize, BOOT_MEM_RAM);
diff --git a/arch/mips/philips/pnx8550/stb810/prom_init.c b/arch/mips/philips/pnx8550/stb810/prom_init.c
index fdb33ed089b9..832dd60b0a7a 100644
--- a/arch/mips/philips/pnx8550/stb810/prom_init.c
+++ b/arch/mips/philips/pnx8550/stb810/prom_init.c
@@ -41,8 +41,6 @@ void __init prom_init(void)
 
         prom_init_cmdline();
 
-        mips_machtype = MACH_PHILIPS_STB810;
-
         memsize = 0x08000000; /* Trimedia uses memory above */
         add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h b/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h
deleted file mode 100644
index 31c5523276fa..000000000000
--- a/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- *  arch/mips/pmc-sierra/yosemite/i2c-yosemite.h
- *
- *  Copyright (C) 2003 PMC-Sierra Inc.
- *  Author: Manish Lachwani (lachwani@pmc-sierra.com)
- *
- *  This program is free software; you can redistribute  it and/or modify it
- *  under  the terms of  the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the  License, or (at your
- *  option) any later version.
- *
- *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
- *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
- *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
- *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
- *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
- *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *  You should have received a copy of the  GNU General Public License along
- *  with this program; if not, write  to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef __I2C_YOSEMITE_H
-#define __I2C_YOSEMITE_H
-
-/* Read and Write operations to the chip */
-
-#define TITAN_I2C_BASE                  0xbb000000      /* XXX Needs to change */
-
-#define TITAN_I2C_WRITE(offset, data)   \
-                                        *(volatile unsigned long *)(TITAN_I2C_BASE + offset) = data
-
-#define TITAN_I2C_READ(offset) *(volatile unsigned long *)(TITAN_I2C_BASE + offset)
-
-
-/* Local constansts*/
-#define TITAN_I2C_MAX_FILTER            15
-#define TITAN_I2C_MAX_CLK               1023
-#define TITAN_I2C_MAX_ARBF              15
-#define TITAN_I2C_MAX_NAK               15
-#define TITAN_I2C_MAX_MASTERCODE        7
-#define TITAN_I2C_MAX_WORDS_PER_RW      4
-#define TITAN_I2C_MAX_POLL              100
-
-/* Registers used for I2C work */
-#define TITAN_I2C_SCMB_CONTROL          0x0180  /* SCMB Control */
-#define TITAN_I2C_SCMB_CLOCK_A          0x0184  /* SCMB Clock A */
-#define TITAN_I2C_SCMB_CLOCK_B          0x0188  /* SCMB Clock B */
-#define TITAN_I2C_CONFIG                0x01A0  /* I2C Config */
-#define TITAN_I2C_COMMAND               0x01A4  /* I2C Command */
-#define TITAN_I2C_SLAVE_ADDRESS         0x01A8  /* I2C Slave Address */
-#define TITAN_I2C_DATA                  0x01AC  /* I2C Data [15:0] */
-#define TITAN_I2C_INTERRUPTS            0x01BC  /* I2C Interrupts */
-
-/* Error */
-#define TITAN_I2C_ERR_ARB_LOST          (-9220)
-#define TITAN_I2C_ERR_NO_RESP           (-9221)
-#define TITAN_I2C_ERR_DATA_COLLISION    (-9222)
-#define TITAN_I2C_ERR_TIMEOUT           (-9223)
-#define TITAN_I2C_ERR_OK                0
-
-/* I2C Command Type */
-typedef enum {
-        TITAN_I2C_CMD_WRITE = 0,
-        TITAN_I2C_CMD_READ = 1,
-        TITAN_I2C_CMD_READ_WRITE = 2
-} titan_i2c_cmd_type;
-
-/* I2C structures */
-typedef struct {
-        int filtera;            /* Register 0x0184, bits 15 - 12 */
-        int clka;               /* Register 0x0184, bits 9 - 0 */
-        int filterb;            /* Register 0x0188, bits 15 - 12 */
-        int clkb;               /* Register 0x0188, bits 9 - 0 */
-} titan_i2c_config;
-
-/* I2C command type */
-typedef struct {
-        titan_i2c_cmd_type type;        /* Type of command */
-        int num_arb;            /* Register 0x01a0, bits 15 - 12 */
-        int num_nak;            /* Register 0x01a0, bits 11 - 8 */
-        int addr_size;          /* Register 0x01a0, bit 7 */
-        int mst_code;           /* Register 0x01a0, bits 6 - 4 */
-        int arb_en;             /* Register 0x01a0, bit 1 */
-        int speed;              /* Register 0x01a0, bit 0 */
-        int slave_addr;         /* Register 0x01a8 */
-        int write_size;         /* Register 0x01a4, bits 10 - 8 */
-        unsigned int *data;     /* Register 0x01ac */
-} titan_i2c_command;
-
-#endif                          /* __I2C_YOSEMITE_H */
diff --git a/arch/mips/pmc-sierra/yosemite/prom.c b/arch/mips/pmc-sierra/yosemite/prom.c
index 9b9936de6589..35dc435846a6 100644
--- a/arch/mips/pmc-sierra/yosemite/prom.c
+++ b/arch/mips/pmc-sierra/yosemite/prom.c
@@ -19,6 +19,7 @@
 #include <asm/pgtable.h>
 #include <asm/processor.h>
 #include <asm/reboot.h>
+#include <asm/smp-ops.h>
 #include <asm/system.h>
 #include <asm/bootinfo.h>
 #include <asm/pmon.h>
@@ -78,6 +79,8 @@ static void prom_halt(void)
                 __asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
 }
 
+extern struct plat_smp_ops yos_smp_ops;
+
 /*
  * Init routine which accepts the variables from PMON
  */
@@ -126,9 +129,9 @@ void __init prom_init(void)
                 env++;
         }
 
-        mips_machtype = MACH_TITAN_YOSEMITE;
-
         prom_grab_secondary();
+
+        register_smp_ops(&yos_smp_ops);
 }
 
 void __init prom_free_prom_memory(void)
diff --git a/arch/mips/pmc-sierra/yosemite/smp.c b/arch/mips/pmc-sierra/yosemite/smp.c
index b0f12cd2968a..653f3ec61cab 100644
--- a/arch/mips/pmc-sierra/yosemite/smp.c
+++ b/arch/mips/pmc-sierra/yosemite/smp.c
@@ -42,70 +42,6 @@ void __init prom_grab_secondary(void)
                       launchstack + LAUNCHSTACK_SIZE, 0);
 }
 
-/*
- * Detect available CPUs, populate phys_cpu_present_map before smp_init
- *
- * We don't want to start the secondary CPU yet nor do we have a nice probing
- * feature in PMON so we just assume presence of the secondary core.
- */
-void __init plat_smp_setup(void)
-{
-        int i;
-
-        cpus_clear(phys_cpu_present_map);
-
-        for (i = 0; i < 2; i++) {
-                cpu_set(i, phys_cpu_present_map);
-                __cpu_number_map[i]     = i;
-                __cpu_logical_map[i]    = i;
-        }
-}
-
-void __init plat_prepare_cpus(unsigned int max_cpus)
-{
-        /*
-         * Be paranoid.  Enable the IPI only if we're really about to go SMP.
-         */
-        if (cpus_weight(cpu_possible_map))
-                set_c0_status(STATUSF_IP5);
-}
-
-/*
- * Firmware CPU startup hook
- * Complicated by PMON's weird interface which tries to minimic the UNIX fork.
- * It launches the next * available CPU and copies some information on the
- * stack so the first thing we do is throw away that stuff and load useful
- * values into the registers ...
- */
-void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
-{
-        unsigned long gp = (unsigned long) task_thread_info(idle);
-        unsigned long sp = __KSTK_TOS(idle);
-
-        secondary_sp = sp;
-        secondary_gp = gp;
-
-        spin_unlock(&launch_lock);
-}
-
-/* Hook for after all CPUs are online */
-void prom_cpus_done(void)
-{
-}
-
-/*
- *  After we've done initial boot, this function is called to allow the
- *  board code to clean up state, if needed
- */
-void __cpuinit prom_init_secondary(void)
-{
-        set_c0_status(ST0_CO | ST0_IE | ST0_IM);
-}
-
-void __cpuinit prom_smp_finish(void)
-{
-}
-
 void titan_mailbox_irq(void)
 {
         int cpu = smp_processor_id();
@@ -133,7 +69,7 @@ void titan_mailbox_irq(void)
 /*
  * Send inter-processor interrupt
  */
-void core_send_ipi(int cpu, unsigned int action)
+static void yos_send_ipi_single(int cpu, unsigned int action)
 {
         /*
          * Generate an INTMSG so that it can be sent over to the
@@ -159,3 +95,86 @@ void core_send_ipi(int cpu, unsigned int action)
                 break;
         }
 }
+
+static void yos_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+        unsigned int i;
+
+        for_each_cpu_mask(i, mask)
+                yos_send_ipi_single(i, action);
+}
+
+/*
+ *  After we've done initial boot, this function is called to allow the
+ *  board code to clean up state, if needed
+ */
+static void __cpuinit yos_init_secondary(void)
+{
+        set_c0_status(ST0_CO | ST0_IE | ST0_IM);
+}
+
+static void __cpuinit yos_smp_finish(void)
+{
+}
+
+/* Hook for after all CPUs are online */
+static void yos_cpus_done(void)
+{
+}
+
+/*
+ * Firmware CPU startup hook
+ * Complicated by PMON's weird interface which tries to minimic the UNIX fork.
+ * It launches the next * available CPU and copies some information on the
+ * stack so the first thing we do is throw away that stuff and load useful
+ * values into the registers ...
+ */
+static void __cpuinit yos_boot_secondary(int cpu, struct task_struct *idle)
+{
+        unsigned long gp = (unsigned long) task_thread_info(idle);
+        unsigned long sp = __KSTK_TOS(idle);
+
+        secondary_sp = sp;
+        secondary_gp = gp;
+
+        spin_unlock(&launch_lock);
+}
+
+/*
+ * Detect available CPUs, populate phys_cpu_present_map before smp_init
+ *
+ * We don't want to start the secondary CPU yet nor do we have a nice probing
+ * feature in PMON so we just assume presence of the secondary core.
+ */
+static void __init yos_smp_setup(void)
+{
+        int i;
+
+        cpus_clear(phys_cpu_present_map);
+
+        for (i = 0; i < 2; i++) {
+                cpu_set(i, phys_cpu_present_map);
+                __cpu_number_map[i]     = i;
+                __cpu_logical_map[i]    = i;
+        }
+}
+
+static void __init yos_prepare_cpus(unsigned int max_cpus)
+{
+        /*
+         * Be paranoid.  Enable the IPI only if we're really about to go SMP.
+         */
+        if (cpus_weight(cpu_possible_map))
+                set_c0_status(STATUSF_IP5);
+}
+
+struct plat_smp_ops yos_smp_ops = {
+        .send_ipi_single        = yos_send_ipi_single,
+        .send_ipi_mask          = yos_send_ipi_mask,
+        .init_secondary         = yos_init_secondary,
+        .smp_finish             = yos_smp_finish,
+        .cpus_done              = yos_cpus_done,
+        .boot_secondary         = yos_boot_secondary,
+        .smp_setup              = yos_smp_setup,
+        .prepare_cpus           = yos_prepare_cpus,
+};
diff --git a/arch/mips/qemu/Makefile b/arch/mips/qemu/Makefile
deleted file mode 100644
index 2ba4ef34b4a7..000000000000
--- a/arch/mips/qemu/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# Makefile for Qemu specific kernel interface routines under Linux.
-#
-
-obj-y           = q-firmware.o q-irq.o q-mem.o q-setup.o q-reset.o
-
-obj-$(CONFIG_EARLY_PRINTK)      += q-console.o
-obj-$(CONFIG_SMP)               += q-smp.o
-
-EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/qemu/q-console.c b/arch/mips/qemu/q-console.c
deleted file mode 100644
index 81101ae5017a..000000000000
--- a/arch/mips/qemu/q-console.c
+++ /dev/null
@@ -1,26 +0,0 @@
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/serial_reg.h>
-#include <asm/io.h>
-
-#define PORT(offset) (0x3f8 + (offset))
-
-static inline unsigned int serial_in(int offset)
-{
-        return inb(PORT(offset));
-}
-
-static inline void serial_out(int offset, int value)
-{
-        outb(value, PORT(offset));
-}
-
-int prom_putchar(char c)
-{
-        while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
-                ;
-
-        serial_out(UART_TX, c);
-
-        return 1;
-}
diff --git a/arch/mips/qemu/q-firmware.c b/arch/mips/qemu/q-firmware.c
deleted file mode 100644
index 3ed43f416cd1..000000000000
--- a/arch/mips/qemu/q-firmware.c
+++ /dev/null
@@ -1,24 +0,0 @@
-#include <linux/init.h>
-#include <linux/string.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
-#include <asm/io.h>
-
-#define QEMU_PORT_BASE 0xb4000000
-
-void __init prom_init(void)
-{
-        int *cmdline;
-
-        cmdline = (int *) (CKSEG0 + (0x10 << 20) - 260);
-        if (*cmdline == 0x12345678) {
-                if (*(char *)(cmdline + 1))
-                        strcpy(arcs_cmdline, (char *)(cmdline + 1));
-                add_memory_region(0x0<<20, cmdline[-1], BOOT_MEM_RAM);
-        } else {
-                add_memory_region(0x0<<20, 0x10<<20, BOOT_MEM_RAM);
-        }
-
-
-        set_io_port_base(QEMU_PORT_BASE);
-}
diff --git a/arch/mips/qemu/q-irq.c b/arch/mips/qemu/q-irq.c
deleted file mode 100644
index 7df36dbe65c7..000000000000
--- a/arch/mips/qemu/q-irq.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/linkage.h>
-
-#include <asm/i8259.h>
-#include <asm/irq_cpu.h>
-#include <asm/mipsregs.h>
-#include <asm/qemu.h>
-#include <asm/system.h>
-#include <asm/time.h>
-
-asmlinkage void plat_irq_dispatch(void)
-{
-        unsigned int pending = read_c0_status() & read_c0_cause();
-
-        if (pending & 0x8000) {
-                do_IRQ(Q_COUNT_COMPARE_IRQ);
-                return;
-        }
-        if (pending & 0x0400) {
-                int irq = i8259_irq();
-
-                if (likely(irq >= 0))
-                        do_IRQ(irq);
-
-                return;
-        }
-}
-
-void __init arch_init_irq(void)
-{
-        mips_hpt_frequency = QEMU_C0_COUNTER_CLOCK;             /* 100MHz */
-
-        mips_cpu_irq_init();
-        init_i8259_irqs();
-        set_c0_status(0x400);
-}
diff --git a/arch/mips/qemu/q-mem.c b/arch/mips/qemu/q-mem.c
deleted file mode 100644
index dae39b59de15..000000000000
--- a/arch/mips/qemu/q-mem.c
+++ /dev/null
@@ -1,5 +0,0 @@
-#include <linux/init.h>
-
-void __init prom_free_prom_memory(void)
-{
-}
diff --git a/arch/mips/qemu/q-reset.c b/arch/mips/qemu/q-reset.c
deleted file mode 100644
index dbbe44ad7e89..000000000000
--- a/arch/mips/qemu/q-reset.c
+++ /dev/null
@@ -1,33 +0,0 @@
-
-#include <asm/io.h>
-#include <asm/reboot.h>
-#include <asm/cacheflush.h>
-#include <asm/qemu.h>
-
-static void qemu_machine_restart(char *command)
-{
-        volatile unsigned int *reg = (unsigned int *)QEMU_RESTART_REG;
-
-        set_c0_status(ST0_BEV | ST0_ERL);
-        change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
-        flush_cache_all();
-        write_c0_wired(0);
-        *reg = 42;
-        while (1)
-                cpu_wait();
-}
-
-static void qemu_machine_halt(void)
-{
-        volatile unsigned int *reg = (unsigned int *)QEMU_HALT_REG;
-
-        *reg = 42;
-        while (1)
-                cpu_wait();
-}
-
-void qemu_reboot_setup(void)
-{
-        _machine_restart = qemu_machine_restart;
-        _machine_halt = qemu_machine_halt;
-}
diff --git a/arch/mips/qemu/q-setup.c b/arch/mips/qemu/q-setup.c
deleted file mode 100644
index 969cedc8d8b9..000000000000
--- a/arch/mips/qemu/q-setup.c
+++ /dev/null
@@ -1,22 +0,0 @@
-#include <linux/init.h>
-
-#include <asm/i8253.h>
-#include <asm/io.h>
-#include <asm/time.h>
-
-extern void qemu_reboot_setup(void);
-
-const char *get_system_type(void)
-{
-        return "Qemu";
-}
-
-void __init plat_time_init(void)
-{
-        setup_pit_timer();
-}
-
-void __init plat_mem_setup(void)
-{
-        qemu_reboot_setup();
-}
diff --git a/arch/mips/qemu/q-smp.c b/arch/mips/qemu/q-smp.c
deleted file mode 100644
index 4b0178d0df0b..000000000000
--- a/arch/mips/qemu/q-smp.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2006 by Ralf Baechle (ralf@linux-mips.org)
- *
- * Symmetric Uniprocessor (TM) Support
- */
-#include <linux/kernel.h>
-#include <linux/sched.h>
-
-/*
- * Send inter-processor interrupt
- */
-void core_send_ipi(int cpu, unsigned int action)
-{
-        panic(KERN_ERR "%s called", __FUNCTION__);
-}
-
-/*
- *  After we've done initial boot, this function is called to allow the
- *  board code to clean up state, if needed
- */
-void __cpuinit prom_init_secondary(void)
-{
-}
-
-void __cpuinit prom_smp_finish(void)
-{
-}
-
-/* Hook for after all CPUs are online */
-void prom_cpus_done(void)
-{
-}
-
-void __init prom_prepare_cpus(unsigned int max_cpus)
-{
-        cpus_clear(phys_cpu_present_map);
-}
-
-/*
- * Firmware CPU startup hook
- */
-void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
-{
-}
-
-void __init plat_smp_setup(void)
-{
-}
-void __init plat_prepare_cpus(unsigned int max_cpus)
-{
-}
diff --git a/arch/mips/sgi-ip22/Makefile b/arch/mips/sgi-ip22/Makefile
index e3acb51b70b5..ef1564e40c8d 100644
--- a/arch/mips/sgi-ip22/Makefile
+++ b/arch/mips/sgi-ip22/Makefile
@@ -3,9 +3,11 @@
 # under Linux.
 #
 
-obj-y   += ip22-mc.o ip22-hpc.o ip22-int.o ip22-berr.o \
-           ip22-time.o ip22-nvram.o ip22-platform.o ip22-reset.o ip22-setup.o
+obj-y   += ip22-mc.o ip22-hpc.o ip22-int.o ip22-time.o ip22-nvram.o \
+           ip22-platform.o ip22-reset.o ip22-setup.o
 
+obj-$(CONFIG_SGI_IP22) += ip22-berr.o
+obj-$(CONFIG_SGI_IP28) += ip28-berr.o
 obj-$(CONFIG_EISA)      += ip22-eisa.o
 
-EXTRA_CFLAGS += -Werror
+# EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/sgi-ip22/ip22-mc.c b/arch/mips/sgi-ip22/ip22-mc.c
index 01a805dcc67c..3f35d6367bec 100644
--- a/arch/mips/sgi-ip22/ip22-mc.c
+++ b/arch/mips/sgi-ip22/ip22-mc.c
@@ -4,6 +4,7 @@
  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
  * Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu) - Indigo2 changes
  * Copyright (C) 2003 Ladislav Michl  (ladis@linux-mips.org)
+ * Copyright (C) 2004 Peter Fuerst    (pf@net.alphadv.de) - IP28
  */
 
 #include <linux/init.h>
@@ -137,9 +138,12 @@ void __init sgimc_init(void)
         /* Step 2: Enable all parity checking in cpu control register
          *         zero.
          */
+        /* don't touch parity settings for IP28 */
+#ifndef CONFIG_SGI_IP28
         tmp = sgimc->cpuctrl0;
         tmp |= (SGIMC_CCTRL0_EPERRGIO | SGIMC_CCTRL0_EPERRMEM |
                 SGIMC_CCTRL0_R4KNOCHKPARR);
+#endif
         sgimc->cpuctrl0 = tmp;
 
         /* Step 3: Setup the MC write buffer depth, this is controlled
diff --git a/arch/mips/sgi-ip22/ip28-berr.c b/arch/mips/sgi-ip22/ip28-berr.c
new file mode 100644
index 000000000000..30e12e2ec4b5
--- /dev/null
+++ b/arch/mips/sgi-ip22/ip28-berr.c
@@ -0,0 +1,502 @@
+/*
+ * ip28-berr.c: Bus error handling.
+ *
+ * Copyright (C) 2002, 2003 Ladislav Michl (ladis@linux-mips.org)
+ * Copyright (C) 2005 Peter Fuerst (pf@net.alphadv.de) - IP28
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+
+#include <asm/addrspace.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/branch.h>
+#include <asm/irq_regs.h>
+#include <asm/sgi/mc.h>
+#include <asm/sgi/hpc3.h>
+#include <asm/sgi/ioc.h>
+#include <asm/sgi/ip22.h>
+#include <asm/r4kcache.h>
+#include <asm/uaccess.h>
+#include <asm/bootinfo.h>
+
+static unsigned int count_be_is_fixup;
+static unsigned int count_be_handler;
+static unsigned int count_be_interrupt;
+static int debug_be_interrupt;
+
+static unsigned int cpu_err_stat;       /* Status reg for CPU */
+static unsigned int gio_err_stat;       /* Status reg for GIO */
+static unsigned int cpu_err_addr;       /* Error address reg for CPU */
+static unsigned int gio_err_addr;       /* Error address reg for GIO */
+static unsigned int extio_stat;
+static unsigned int hpc3_berr_stat;     /* Bus error interrupt status */
+
+struct hpc3_stat {
+        unsigned long addr;
+        unsigned int ctrl;
+        unsigned int cbp;
+        unsigned int ndptr;
+};
+
+static struct {
+        struct hpc3_stat pbdma[8];
+        struct hpc3_stat scsi[2];
+        struct hpc3_stat ethrx, ethtx;
+} hpc3;
+
+static struct {
+        unsigned long err_addr;
+        struct {
+                u32 lo;
+                u32 hi;
+        } tags[1][2], tagd[4][2], tagi[4][2]; /* Way 0/1 */
+} cache_tags;
+
+static inline void save_cache_tags(unsigned busaddr)
+{
+        unsigned long addr = CAC_BASE | busaddr;
+        int i;
+        cache_tags.err_addr = addr;
+
+        /*
+         * Starting with a bus-address, save secondary cache (indexed by
+         * PA[23..18:7..6]) tags first.
+         */
+        addr &= ~1L;
+#define tag cache_tags.tags[0]
+        cache_op(Index_Load_Tag_S, addr);
+        tag[0].lo = read_c0_taglo();    /* PA[35:18], VA[13:12] */
+        tag[0].hi = read_c0_taghi();    /* PA[39:36] */
+        cache_op(Index_Load_Tag_S, addr | 1L);
+        tag[1].lo = read_c0_taglo();    /* PA[35:18], VA[13:12] */
+        tag[1].hi = read_c0_taghi();    /* PA[39:36] */
+#undef tag
+
+        /*
+         * Save all primary data cache (indexed by VA[13:5]) tags which
+         * might fit to this bus-address, knowing that VA[11:0] == PA[11:0].
+         * Saving all tags and evaluating them later is easier and safer
+         * than relying on VA[13:12] from the secondary cache tags to pick
+         * matching primary tags here already.
+         */
+        addr &= (0xffL << 56) | ((1 << 12) - 1);
+#define tag cache_tags.tagd[i]
+        for (i = 0; i < 4; ++i, addr += (1 << 12)) {
+                cache_op(Index_Load_Tag_D, addr);
+                tag[0].lo = read_c0_taglo();    /* PA[35:12] */
+                tag[0].hi = read_c0_taghi();    /* PA[39:36] */
+                cache_op(Index_Load_Tag_D, addr | 1L);
+                tag[1].lo = read_c0_taglo();    /* PA[35:12] */
+                tag[1].hi = read_c0_taghi();    /* PA[39:36] */
+        }
+#undef tag
+
+        /*
+         * Save primary instruction cache (indexed by VA[13:6]) tags
+         * the same way.
+         */
+        addr &= (0xffL << 56) | ((1 << 12) - 1);
+#define tag cache_tags.tagi[i]
+        for (i = 0; i < 4; ++i, addr += (1 << 12)) {
+                cache_op(Index_Load_Tag_I, addr);
+                tag[0].lo = read_c0_taglo();    /* PA[35:12] */
+                tag[0].hi = read_c0_taghi();    /* PA[39:36] */
+                cache_op(Index_Load_Tag_I, addr | 1L);
+                tag[1].lo = read_c0_taglo();    /* PA[35:12] */
+                tag[1].hi = read_c0_taghi();    /* PA[39:36] */
+        }
+#undef tag
+}
+
+#define GIO_ERRMASK     0xff00
+#define CPU_ERRMASK     0x3f00
+
+static void save_and_clear_buserr(void)
+{
+        int i;
+
+        /* save status registers */
+        cpu_err_addr = sgimc->cerr;
+        cpu_err_stat = sgimc->cstat;
+        gio_err_addr = sgimc->gerr;
+        gio_err_stat = sgimc->gstat;
+        extio_stat = sgioc->extio;
+        hpc3_berr_stat = hpc3c0->bestat;
+
+        hpc3.scsi[0].addr  = (unsigned long)&hpc3c0->scsi_chan0;
+        hpc3.scsi[0].ctrl  = hpc3c0->scsi_chan0.ctrl; /* HPC3_SCTRL_ACTIVE ? */
+        hpc3.scsi[0].cbp   = hpc3c0->scsi_chan0.cbptr;
+        hpc3.scsi[0].ndptr = hpc3c0->scsi_chan0.ndptr;
+
+        hpc3.scsi[1].addr  = (unsigned long)&hpc3c0->scsi_chan1;
+        hpc3.scsi[1].ctrl  = hpc3c0->scsi_chan1.ctrl; /* HPC3_SCTRL_ACTIVE ? */
+        hpc3.scsi[1].cbp   = hpc3c0->scsi_chan1.cbptr;
+        hpc3.scsi[1].ndptr = hpc3c0->scsi_chan1.ndptr;
+
+        hpc3.ethrx.addr  = (unsigned long)&hpc3c0->ethregs.rx_cbptr;
+        hpc3.ethrx.ctrl  = hpc3c0->ethregs.rx_ctrl; /* HPC3_ERXCTRL_ACTIVE ? */
+        hpc3.ethrx.cbp   = hpc3c0->ethregs.rx_cbptr;
+        hpc3.ethrx.ndptr = hpc3c0->ethregs.rx_ndptr;
+
+        hpc3.ethtx.addr  = (unsigned long)&hpc3c0->ethregs.tx_cbptr;
+        hpc3.ethtx.ctrl  = hpc3c0->ethregs.tx_ctrl; /* HPC3_ETXCTRL_ACTIVE ? */
+        hpc3.ethtx.cbp   = hpc3c0->ethregs.tx_cbptr;
+        hpc3.ethtx.ndptr = hpc3c0->ethregs.tx_ndptr;
+
+        for (i = 0; i < 8; ++i) {
+                /* HPC3_PDMACTRL_ISACT ? */
+                hpc3.pbdma[i].addr  = (unsigned long)&hpc3c0->pbdma[i];
+                hpc3.pbdma[i].ctrl  = hpc3c0->pbdma[i].pbdma_ctrl;
+                hpc3.pbdma[i].cbp   = hpc3c0->pbdma[i].pbdma_bptr;
+                hpc3.pbdma[i].ndptr = hpc3c0->pbdma[i].pbdma_dptr;
+        }
+        i = 0;
+        if (gio_err_stat & CPU_ERRMASK)
+                i = gio_err_addr;
+        if (cpu_err_stat & CPU_ERRMASK)
+                i = cpu_err_addr;
+        save_cache_tags(i);
+
+        sgimc->cstat = sgimc->gstat = 0;
+}
+
+static void print_cache_tags(void)
+{
+        u32 scb, scw;
+        int i;
+
+        printk(KERN_ERR "Cache tags @ %08x:\n", (unsigned)cache_tags.err_addr);
+
+        /* PA[31:12] shifted to PTag0 (PA[35:12]) format */
+        scw = (cache_tags.err_addr >> 4) & 0x0fffff00;
+
+        scb = cache_tags.err_addr & ((1 << 12) - 1) & ~((1 << 5) - 1);
+        for (i = 0; i < 4; ++i) { /* for each possible VA[13:12] value */
+                if ((cache_tags.tagd[i][0].lo & 0x0fffff00) != scw &&
+                    (cache_tags.tagd[i][1].lo & 0x0fffff00) != scw)
+                    continue;
+                printk(KERN_ERR
+                       "D: 0: %08x %08x, 1: %08x %08x  (VA[13:5]  %04x)\n",
+                        cache_tags.tagd[i][0].hi, cache_tags.tagd[i][0].lo,
+                        cache_tags.tagd[i][1].hi, cache_tags.tagd[i][1].lo,
+                        scb | (1 << 12)*i);
+        }
+        scb = cache_tags.err_addr & ((1 << 12) - 1) & ~((1 << 6) - 1);
+        for (i = 0; i < 4; ++i) { /* for each possible VA[13:12] value */
+                if ((cache_tags.tagi[i][0].lo & 0x0fffff00) != scw &&
+                    (cache_tags.tagi[i][1].lo & 0x0fffff00) != scw)
+                    continue;
+                printk(KERN_ERR
+                       "I: 0: %08x %08x, 1: %08x %08x  (VA[13:6]  %04x)\n",
+                        cache_tags.tagi[i][0].hi, cache_tags.tagi[i][0].lo,
+                        cache_tags.tagi[i][1].hi, cache_tags.tagi[i][1].lo,
+                        scb | (1 << 12)*i);
+        }
+        i = read_c0_config();
+        scb = i & (1 << 13) ? 7:6;      /* scblksize = 2^[7..6] */
+        scw = ((i >> 16) & 7) + 19 - 1; /* scwaysize = 2^[24..19] / 2 */
+
+        i = ((1 << scw) - 1) & ~((1 << scb) - 1);
+        printk(KERN_ERR "S: 0: %08x %08x, 1: %08x %08x  (PA[%u:%u] %05x)\n",
+                cache_tags.tags[0][0].hi, cache_tags.tags[0][0].lo,
+                cache_tags.tags[0][1].hi, cache_tags.tags[0][1].lo,
+                scw-1, scb, i & (unsigned)cache_tags.err_addr);
+}
+
+static inline const char *cause_excode_text(int cause)
+{
+        static const char *txt[32] =
+        {       "Interrupt",
+                "TLB modification",
+                "TLB (load or instruction fetch)",
+                "TLB (store)",
+                "Address error (load or instruction fetch)",
+                "Address error (store)",
+                "Bus error (instruction fetch)",
+                "Bus error (data: load or store)",
+                "Syscall",
+                "Breakpoint",
+                "Reserved instruction",
+                "Coprocessor unusable",
+                "Arithmetic Overflow",
+                "Trap",
+                "14",
+                "Floating-Point",
+                "16", "17", "18", "19", "20", "21", "22",
+                "Watch Hi/Lo",
+                "24", "25", "26", "27", "28", "29", "30", "31",
+        };
+        return txt[(cause & 0x7c) >> 2];
+}
+
+static void print_buserr(const struct pt_regs *regs)
+{
+        const int field = 2 * sizeof(unsigned long);
+        int error = 0;
+
+        if (extio_stat & EXTIO_MC_BUSERR) {
+                printk(KERN_ERR "MC Bus Error\n");
+                error |= 1;
+        }
+        if (extio_stat & EXTIO_HPC3_BUSERR) {
+                printk(KERN_ERR "HPC3 Bus Error 0x%x:<id=0x%x,%s,lane=0x%x>\n",
+                        hpc3_berr_stat,
+                        (hpc3_berr_stat & HPC3_BESTAT_PIDMASK) >>
+                                          HPC3_BESTAT_PIDSHIFT,
+                        (hpc3_berr_stat & HPC3_BESTAT_CTYPE) ? "PIO" : "DMA",
+                        hpc3_berr_stat & HPC3_BESTAT_BLMASK);
+                error |= 2;
+        }
+        if (extio_stat & EXTIO_EISA_BUSERR) {
+                printk(KERN_ERR "EISA Bus Error\n");
+                error |= 4;
+        }
+        if (cpu_err_stat & CPU_ERRMASK) {
+                printk(KERN_ERR "CPU error 0x%x<%s%s%s%s%s%s> @ 0x%08x\n",
+                        cpu_err_stat,
+                        cpu_err_stat & SGIMC_CSTAT_RD ? "RD " : "",
+                        cpu_err_stat & SGIMC_CSTAT_PAR ? "PAR " : "",
+                        cpu_err_stat & SGIMC_CSTAT_ADDR ? "ADDR " : "",
+                        cpu_err_stat & SGIMC_CSTAT_SYSAD_PAR ? "SYSAD " : "",
+                        cpu_err_stat & SGIMC_CSTAT_SYSCMD_PAR ? "SYSCMD " : "",
+                        cpu_err_stat & SGIMC_CSTAT_BAD_DATA ? "BAD_DATA " : "",
+                        cpu_err_addr);
+                error |= 8;
+        }
+        if (gio_err_stat & GIO_ERRMASK) {
+                printk(KERN_ERR "GIO error 0x%x:<%s%s%s%s%s%s%s%s> @ 0x%08x\n",
+                        gio_err_stat,
+                        gio_err_stat & SGIMC_GSTAT_RD ? "RD " : "",
+                        gio_err_stat & SGIMC_GSTAT_WR ? "WR " : "",
+                        gio_err_stat & SGIMC_GSTAT_TIME ? "TIME " : "",
+                        gio_err_stat & SGIMC_GSTAT_PROM ? "PROM " : "",
+                        gio_err_stat & SGIMC_GSTAT_ADDR ? "ADDR " : "",
+                        gio_err_stat & SGIMC_GSTAT_BC ? "BC " : "",
+                        gio_err_stat & SGIMC_GSTAT_PIO_RD ? "PIO_RD " : "",
+                        gio_err_stat & SGIMC_GSTAT_PIO_WR ? "PIO_WR " : "",
+                        gio_err_addr);
+                error |= 16;
+        }
+        if (!error)
+                printk(KERN_ERR "MC: Hmm, didn't find any error condition.\n");
+        else {
+                printk(KERN_ERR "CP0: config %08x,  "
+                        "MC: cpuctrl0/1: %08x/%05x, giopar: %04x\n"
+                        "MC: cpu/gio_memacc: %08x/%05x, memcfg0/1: %08x/%08x\n",
+                        read_c0_config(),
+                        sgimc->cpuctrl0, sgimc->cpuctrl0, sgimc->giopar,
+                        sgimc->cmacc, sgimc->gmacc,
+                        sgimc->mconfig0, sgimc->mconfig1);
+                print_cache_tags();
+        }
+        printk(KERN_ALERT "%s, epc == %0*lx, ra == %0*lx\n",
+               cause_excode_text(regs->cp0_cause),
+               field, regs->cp0_epc, field, regs->regs[31]);
+}
+
+/*
+ * Check, whether MC's (virtual) DMA address caused the bus error.
+ * See "Virtual DMA Specification", Draft 1.5, Feb 13 1992, SGI
+ */
+
+static int addr_is_ram(unsigned long addr, unsigned sz)
+{
+        int i;
+
+        for (i = 0; i < boot_mem_map.nr_map; i++) {
+                unsigned long a = boot_mem_map.map[i].addr;
+                if (a <= addr && addr+sz <= a+boot_mem_map.map[i].size)
+                        return 1;
+        }
+        return 0;
+}
+
+static int check_microtlb(u32 hi, u32 lo, unsigned long vaddr)
+{
+        /* This is likely rather similar to correct code ;-) */
+
+        vaddr &= 0x7fffffff; /* Doc. states that top bit is ignored */
+
+        /* If tlb-entry is valid and VPN-high (bits [30:21] ?) matches... */
+        if ((lo & 2) && (vaddr >> 21) == ((hi<<1) >> 22)) {
+                u32 ctl = sgimc->dma_ctrl;
+                if (ctl & 1) {
+                        unsigned int pgsz = (ctl & 2) ? 14:12; /* 16k:4k */
+                        /* PTEIndex is VPN-low (bits [22:14]/[20:12] ?) */
+                        unsigned long pte = (lo >> 6) << 12; /* PTEBase */
+                        pte += 8*((vaddr >> pgsz) & 0x1ff);
+                        if (addr_is_ram(pte, 8)) {
+                                /*
+                                 * Note: Since DMA hardware does look up
+                                 * translation on its own, this PTE *must*
+                                 * match the TLB/EntryLo-register format !
+                                 */
+                                unsigned long a = *(unsigned long *)
+                                                PHYS_TO_XKSEG_UNCACHED(pte);
+                                a = (a & 0x3f) << 6; /* PFN */
+                                a += vaddr & ((1 << pgsz) - 1);
+                                return (cpu_err_addr == a);
+                        }
+                }
+        }
+        return 0;
+}
+
+static int check_vdma_memaddr(void)
+{
+        if (cpu_err_stat & CPU_ERRMASK) {
+                u32 a = sgimc->maddronly;
+
+                if (!(sgimc->dma_ctrl & 0x100)) /* Xlate-bit clear ? */
+                        return (cpu_err_addr == a);
+
+                if (check_microtlb(sgimc->dtlb_hi0, sgimc->dtlb_lo0, a) ||
+                    check_microtlb(sgimc->dtlb_hi1, sgimc->dtlb_lo1, a) ||
+                    check_microtlb(sgimc->dtlb_hi2, sgimc->dtlb_lo2, a) ||
+                    check_microtlb(sgimc->dtlb_hi3, sgimc->dtlb_lo3, a))
+                        return 1;
+        }
+        return 0;
+}
+
+static int check_vdma_gioaddr(void)
+{
+        if (gio_err_stat & GIO_ERRMASK) {
+                u32 a = sgimc->gio_dma_trans;
+                a = (sgimc->gmaddronly & ~a) | (sgimc->gio_dma_sbits & a);
+                return (gio_err_addr == a);
+        }
+        return 0;
+}
+
+/*
+ * MC sends an interrupt whenever bus or parity errors occur. In addition,
+ * if the error happened during a CPU read, it also asserts the bus error
+ * pin on the R4K. Code in bus error handler save the MC bus error registers
+ * and then clear the interrupt when this happens.
+ */
+
+static int ip28_be_interrupt(const struct pt_regs *regs)
+{
+        int i;
+
+        save_and_clear_buserr();
+        /*
+         * Try to find out, whether we got here by a mispredicted speculative
+         * load/store operation.  If so, it's not fatal, we can go on.
+         */
+        /* Any cause other than "Interrupt" (ExcCode 0) is fatal. */
+        if (regs->cp0_cause & CAUSEF_EXCCODE)
+                goto mips_be_fatal;
+
+        /* Any cause other than "Bus error interrupt" (IP6) is weird. */
+        if ((regs->cp0_cause & CAUSEF_IP6) != CAUSEF_IP6)
+                goto mips_be_fatal;
+
+        if (extio_stat & (EXTIO_HPC3_BUSERR | EXTIO_EISA_BUSERR))
+                goto mips_be_fatal;
+
+        /* Any state other than "Memory bus error" is fatal. */
+        if (cpu_err_stat & CPU_ERRMASK & ~SGIMC_CSTAT_ADDR)
+                goto mips_be_fatal;
+
+        /* GIO errors other than timeouts are fatal */
+        if (gio_err_stat & GIO_ERRMASK & ~SGIMC_GSTAT_TIME)
+                goto mips_be_fatal;
+
+        /*
+         * Now we have an asynchronous bus error, speculatively or DMA caused.
+         * Need to search all DMA descriptors for the error address.
+         */
+        for (i = 0; i < sizeof(hpc3)/sizeof(struct hpc3_stat); ++i) {
+                struct hpc3_stat *hp = (struct hpc3_stat *)&hpc3 + i;
+                if ((cpu_err_stat & CPU_ERRMASK) &&
+                    (cpu_err_addr == hp->ndptr || cpu_err_addr == hp->cbp))
+                        break;
+                if ((gio_err_stat & GIO_ERRMASK) &&
+                    (gio_err_addr == hp->ndptr || gio_err_addr == hp->cbp))
+                        break;
+        }
+        if (i < sizeof(hpc3)/sizeof(struct hpc3_stat)) {
+                struct hpc3_stat *hp = (struct hpc3_stat *)&hpc3 + i;
+                printk(KERN_ERR "at DMA addresses: HPC3 @ %08lx:"
+                       " ctl %08x, ndp %08x, cbp %08x\n",
+                       CPHYSADDR(hp->addr), hp->ctrl, hp->ndptr, hp->cbp);
+                goto mips_be_fatal;
+        }
+        /* Check MC's virtual DMA stuff. */
+        if (check_vdma_memaddr()) {
+                printk(KERN_ERR "at GIO DMA: mem address 0x%08x.\n",
+                        sgimc->maddronly);
+                goto mips_be_fatal;
+        }
+        if (check_vdma_gioaddr()) {
+                printk(KERN_ERR "at GIO DMA: gio address 0x%08x.\n",
+                        sgimc->gmaddronly);
+                goto mips_be_fatal;
+        }
+        /* A speculative bus error... */
+        if (debug_be_interrupt) {
+                print_buserr(regs);
+                printk(KERN_ERR "discarded!\n");
+        }
+        return MIPS_BE_DISCARD;
+
+mips_be_fatal:
+        print_buserr(regs);
+        return MIPS_BE_FATAL;
+}
+
+void ip22_be_interrupt(int irq)
+{
+        const struct pt_regs *regs = get_irq_regs();
+
+        count_be_interrupt++;
+
+        if (ip28_be_interrupt(regs) != MIPS_BE_DISCARD) {
+                /* Assume it would be too dangerous to continue ... */
+                die_if_kernel("Oops", regs);
+                force_sig(SIGBUS, current);
+        } else if (debug_be_interrupt)
+                show_regs((struct pt_regs *)regs);
+}
+
+static int ip28_be_handler(struct pt_regs *regs, int is_fixup)
+{
+        /*
+         * We arrive here only in the unusual case of do_be() invocation,
+         * i.e. by a bus error exception without a bus error interrupt.
+         */
+        if (is_fixup) {
+                count_be_is_fixup++;
+                save_and_clear_buserr();
+                return MIPS_BE_FIXUP;
+        }
+        count_be_handler++;
+        return ip28_be_interrupt(regs);
+}
+
+void __init ip22_be_init(void)
+{
+        board_be_handler = ip28_be_handler;
+}
+
+int ip28_show_be_info(struct seq_file *m)
+{
+        seq_printf(m, "IP28 be fixups\t\t: %u\n", count_be_is_fixup);
+        seq_printf(m, "IP28 be interrupts\t: %u\n", count_be_interrupt);
+        seq_printf(m, "IP28 be handler\t\t: %u\n", count_be_handler);
+
+        return 0;
+}
+
+static int __init debug_be_setup(char *str)
+{
+        debug_be_interrupt++;
+        return 1;
+}
+__setup("ip28_debug_be", debug_be_setup);
diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
index 3305fa9ae66d..a49e7c85f724 100644
--- a/arch/mips/sgi-ip27/ip27-init.c
+++ b/arch/mips/sgi-ip27/ip27-init.c
@@ -27,7 +27,6 @@
 #include <asm/sn/hub.h>
 #include <asm/sn/intr.h>
 #include <asm/current.h>
-#include <asm/smp.h>
 #include <asm/processor.h>
 #include <asm/mmu_context.h>
 #include <asm/thread_info.h>
diff --git a/arch/mips/sgi-ip27/ip27-klnuma.c b/arch/mips/sgi-ip27/ip27-klnuma.c
index f10d9839006d..48932ce1d730 100644
--- a/arch/mips/sgi-ip27/ip27-klnuma.c
+++ b/arch/mips/sgi-ip27/ip27-klnuma.c
@@ -11,7 +11,6 @@
 
 #include <asm/page.h>
 #include <asm/sections.h>
-#include <asm/smp.h>
 #include <asm/sn/types.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/gda.h>
diff --git a/arch/mips/sgi-ip27/ip27-smp.c b/arch/mips/sgi-ip27/ip27-smp.c
index a70656d42191..f15fc93d6b35 100644
--- a/arch/mips/sgi-ip27/ip27-smp.c
+++ b/arch/mips/sgi-ip27/ip27-smp.c
@@ -140,30 +140,51 @@ static __init void intr_clear_all(nasid_t nasid)
                 REMOTE_HUB_CLR_INTR(nasid, i);
 }
 
-void __init plat_smp_setup(void)
+static void ip27_send_ipi_single(int destid, unsigned int action)
 {
-        cnodeid_t       cnode;
+        int irq;
 
-        for_each_online_node(cnode) {
-                if (cnode == 0)
-                        continue;
-                intr_clear_all(COMPACT_TO_NASID_NODEID(cnode));
+        switch (action) {
+        case SMP_RESCHEDULE_YOURSELF:
+                irq = CPU_RESCHED_A_IRQ;
+                break;
+        case SMP_CALL_FUNCTION:
+                irq = CPU_CALL_A_IRQ;
+                break;
+        default:
+                panic("sendintr");
         }
 
-        replicate_kernel_text();
+        irq += cputoslice(destid);
 
         /*
-         * Assumption to be fixed: we're always booted on logical / physical
-         * processor 0.  While we're always running on logical processor 0
-         * this still means this is physical processor zero; it might for
-         * example be disabled in the firwware.
+         * Convert the compact hub number to the NASID to get the correct
+         * part of the address space.  Then set the interrupt bit associated
+         * with the CPU we want to send the interrupt to.
          */
-        alloc_cpupda(0, 0);
+        REMOTE_HUB_SEND_INTR(COMPACT_TO_NASID_NODEID(cpu_to_node(destid)), irq);
 }
 
-void __init plat_prepare_cpus(unsigned int max_cpus)
+static void ip27_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+        unsigned int i;
+
+        for_each_cpu_mask(i, mask)
+                ip27_send_ipi_single(i, action);
+}
+
+static void __cpuinit ip27_init_secondary(void)
+{
+        per_cpu_init();
+        local_irq_enable();
+}
+
+static void __cpuinit ip27_smp_finish(void)
+{
+}
+
+static void __init ip27_cpus_done(void)
 {
-        /* We already did everything necessary earlier */
 }
 
 /*
@@ -171,7 +192,7 @@ void __init plat_prepare_cpus(unsigned int max_cpus)
  * set sp to the kernel stack of the newly created idle process, gp to the proc
  * struct so that current_thread_info() will work.
  */
-void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
+static void __cpuinit ip27_boot_secondary(int cpu, struct task_struct *idle)
 {
         unsigned long gp = (unsigned long)task_thread_info(idle);
         unsigned long sp = __KSTK_TOS(idle);
@@ -181,41 +202,39 @@ void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
                 0, (void *) sp, (void *) gp);
 }
 
-void __cpuinit prom_init_secondary(void)
+static void __init ip27_smp_setup(void)
 {
-        per_cpu_init();
-        local_irq_enable();
-}
-
-void __init prom_cpus_done(void)
-{
-}
-
-void __cpuinit prom_smp_finish(void)
-{
-}
-
-void core_send_ipi(int destid, unsigned int action)
-{
-        int irq;
+        cnodeid_t       cnode;
 
-        switch (action) {
-        case SMP_RESCHEDULE_YOURSELF:
-                irq = CPU_RESCHED_A_IRQ;
-                break;
-        case SMP_CALL_FUNCTION:
-                irq = CPU_CALL_A_IRQ;
-                break;
-        default:
-                panic("sendintr");
+        for_each_online_node(cnode) {
+                if (cnode == 0)
+                        continue;
+                intr_clear_all(COMPACT_TO_NASID_NODEID(cnode));
         }
 
-        irq += cputoslice(destid);
+        replicate_kernel_text();
 
         /*
-         * Convert the compact hub number to the NASID to get the correct
-         * part of the address space.  Then set the interrupt bit associated
-         * with the CPU we want to send the interrupt to.
+         * Assumption to be fixed: we're always booted on logical / physical
+         * processor 0.  While we're always running on logical processor 0
+         * this still means this is physical processor zero; it might for
+         * example be disabled in the firwware.
          */
-        REMOTE_HUB_SEND_INTR(COMPACT_TO_NASID_NODEID(cpu_to_node(destid)), irq);
+        alloc_cpupda(0, 0);
 }
+
+static void __init ip27_prepare_cpus(unsigned int max_cpus)
+{
+        /* We already did everything necessary earlier */
+}
+
+struct plat_smp_ops ip27_smp_ops = {
+        .send_ipi_single        = ip27_send_ipi_single,
+        .send_ipi_mask          = ip27_send_ipi_mask,
+        .init_secondary         = ip27_init_secondary,
+        .smp_finish             = ip27_smp_finish,
+        .cpus_done              = ip27_cpus_done,
+        .boot_secondary         = ip27_boot_secondary,
+        .smp_setup              = ip27_smp_setup,
+        .prepare_cpus           = ip27_prepare_cpus,
+};
diff --git a/arch/mips/sibyte/bcm1480/smp.c b/arch/mips/sibyte/bcm1480/smp.c
index 436ba78359ab..183c460b9ca1 100644
--- a/arch/mips/sibyte/bcm1480/smp.c
+++ b/arch/mips/sibyte/bcm1480/smp.c
@@ -23,6 +23,7 @@
 
 #include <asm/mmu_context.h>
 #include <asm/io.h>
+#include <asm/fw/cfe/cfe_api.h>
 #include <asm/sibyte/sb1250.h>
 #include <asm/sibyte/bcm1480_regs.h>
 #include <asm/sibyte/bcm1480_int.h>
@@ -67,28 +68,114 @@ void __cpuinit bcm1480_smp_init(void)
         change_c0_status(ST0_IM, imask);
 }
 
-void __cpuinit bcm1480_smp_finish(void)
+/*
+ * These are routines for dealing with the sb1250 smp capabilities
+ * independent of board/firmware
+ */
+
+/*
+ * Simple enough; everything is set up, so just poke the appropriate mailbox
+ * register, and we should be set
+ */
+static void bcm1480_send_ipi_single(int cpu, unsigned int action)
+{
+        __raw_writeq((((u64)action)<< 48), mailbox_0_set_regs[cpu]);
+}
+
+static void bcm1480_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+        unsigned int i;
+
+        for_each_cpu_mask(i, mask)
+                bcm1480_send_ipi_single(i, action);
+}
+
+/*
+ * Code to run on secondary just after probing the CPU
+ */
+static void __cpuinit bcm1480_init_secondary(void)
+{
+        extern void bcm1480_smp_init(void);
+
+        bcm1480_smp_init();
+}
+
+/*
+ * Do any tidying up before marking online and running the idle
+ * loop
+ */
+static void __cpuinit bcm1480_smp_finish(void)
 {
         extern void sb1480_clockevent_init(void);
 
         sb1480_clockevent_init();
         local_irq_enable();
+        bcm1480_smp_finish();
 }
 
 /*
- * These are routines for dealing with the sb1250 smp capabilities
- * independent of board/firmware
+ * Final cleanup after all secondaries booted
  */
+static void bcm1480_cpus_done(void)
+{
+}
 
 /*
- * Simple enough; everything is set up, so just poke the appropriate mailbox
- * register, and we should be set
+ * Setup the PC, SP, and GP of a secondary processor and start it
+ * running!
  */
-void core_send_ipi(int cpu, unsigned int action)
+static void __cpuinit bcm1480_boot_secondary(int cpu, struct task_struct *idle)
 {
-        __raw_writeq((((u64)action)<< 48), mailbox_0_set_regs[cpu]);
+        int retval;
+
+        retval = cfe_cpu_start(cpu_logical_map(cpu), &smp_bootstrap,
+                               __KSTK_TOS(idle),
+                               (unsigned long)task_thread_info(idle), 0);
+        if (retval != 0)
+                printk("cfe_start_cpu(%i) returned %i\n" , cpu, retval);
 }
 
+/*
+ * Use CFE to find out how many CPUs are available, setting up
+ * phys_cpu_present_map and the logical/physical mappings.
+ * XXXKW will the boot CPU ever not be physical 0?
+ *
+ * Common setup before any secondaries are started
+ */
+static void __init bcm1480_smp_setup(void)
+{
+        int i, num;
+
+        cpus_clear(phys_cpu_present_map);
+        cpu_set(0, phys_cpu_present_map);
+        __cpu_number_map[0] = 0;
+        __cpu_logical_map[0] = 0;
+
+        for (i = 1, num = 0; i < NR_CPUS; i++) {
+                if (cfe_cpu_stop(i) == 0) {
+                        cpu_set(i, phys_cpu_present_map);
+                        __cpu_number_map[i] = ++num;
+                        __cpu_logical_map[num] = i;
+                }
+        }
+        printk(KERN_INFO "Detected %i available secondary CPU(s)\n", num);
+}
+
+static void __init bcm1480_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+struct plat_smp_ops bcm1480_smp_ops = {
+        .send_ipi_single        = bcm1480_send_ipi_single,
+        .send_ipi_mask          = bcm1480_send_ipi_mask,
+        .init_secondary         = bcm1480_init_secondary,
+        .smp_finish             = bcm1480_smp_finish,
+        .cpus_done              = bcm1480_cpus_done,
+        .boot_secondary         = bcm1480_boot_secondary,
+        .smp_setup              = bcm1480_smp_setup,
+        .prepare_cpus           = bcm1480_prepare_cpus,
+};
+
 void bcm1480_mailbox_interrupt(void)
 {
         int cpu = smp_processor_id();
diff --git a/arch/mips/sibyte/cfe/Makefile b/arch/mips/sibyte/cfe/Makefile
index a1214937b705..02b32e142adf 100644
--- a/arch/mips/sibyte/cfe/Makefile
+++ b/arch/mips/sibyte/cfe/Makefile
@@ -1,3 +1,2 @@
 lib-y                                   = setup.o
-lib-$(CONFIG_SMP)                       += smp.o
 lib-$(CONFIG_SIBYTE_CFE_CONSOLE)        += console.o
diff --git a/arch/mips/sibyte/cfe/setup.c b/arch/mips/sibyte/cfe/setup.c
index dbd6e6fdd3f9..33fce826f8bf 100644
--- a/arch/mips/sibyte/cfe/setup.c
+++ b/arch/mips/sibyte/cfe/setup.c
@@ -28,6 +28,7 @@
 #include <asm/bootinfo.h>
 #include <asm/reboot.h>
 #include <asm/sibyte/board.h>
+#include <asm/smp-ops.h>
 
 #include <asm/fw/cfe/cfe_api.h>
 #include <asm/fw/cfe/cfe_error.h>
@@ -232,6 +233,9 @@ static int __init initrd_setup(char *str)
 
 #endif
 
+extern struct plat_smp_ops sb_smp_ops;
+extern struct plat_smp_ops bcm1480_smp_ops;
+
 /*
  * prom_init is called just after the cpu type is determined, from setup_arch()
  */
@@ -297,9 +301,6 @@ void __init prom_init(void)
                          *  command line
                          */
                         strcpy(arcs_cmdline, "root=/dev/ram0 ");
-#ifdef CONFIG_SIBYTE_PTSWARM
-                        strcat(arcs_cmdline, "console=ttyS0,115200 ");
-#endif
                 } else {
                         /* The loader should have set the command line */
                         /* too early for panic to do any good */
@@ -340,6 +341,13 @@ void __init prom_init(void)
         arcs_cmdline[CL_SIZE-1] = 0;
 
         prom_meminit();
+
+#if defined(CONFIG_SIBYTE_BCM112X) || defined(CONFIG_SIBYTE_SB1250)
+        register_smp_ops(&sb_smp_ops);
+#endif
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+        register_smp_ops(&bcm1480_smp_ops);
+#endif
 }
 
 void __init prom_free_prom_memory(void)
diff --git a/arch/mips/sibyte/cfe/smp.c b/arch/mips/sibyte/cfe/smp.c
deleted file mode 100644
index 534a62912f21..000000000000
--- a/arch/mips/sibyte/cfe/smp.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
- */
-
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <asm/processor.h>
-
-#include <asm/fw/cfe/cfe_api.h>
-#include <asm/fw/cfe/cfe_error.h>
-
-/*
- * Use CFE to find out how many CPUs are available, setting up
- * phys_cpu_present_map and the logical/physical mappings.
- * XXXKW will the boot CPU ever not be physical 0?
- *
- * Common setup before any secondaries are started
- */
-void __init plat_smp_setup(void)
-{
-        int i, num;
-
-        cpus_clear(phys_cpu_present_map);
-        cpu_set(0, phys_cpu_present_map);
-        __cpu_number_map[0] = 0;
-        __cpu_logical_map[0] = 0;
-
-        for (i = 1, num = 0; i < NR_CPUS; i++) {
-                if (cfe_cpu_stop(i) == 0) {
-                        cpu_set(i, phys_cpu_present_map);
-                        __cpu_number_map[i] = ++num;
-                        __cpu_logical_map[num] = i;
-                }
-        }
-        printk(KERN_INFO "Detected %i available secondary CPU(s)\n", num);
-}
-
-void __init plat_prepare_cpus(unsigned int max_cpus)
-{
-}
-
-/*
- * Setup the PC, SP, and GP of a secondary processor and start it
- * running!
- */
-void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
-{
-        int retval;
-
-        retval = cfe_cpu_start(cpu_logical_map(cpu), &smp_bootstrap,
-                               __KSTK_TOS(idle),
-                               (unsigned long)task_thread_info(idle), 0);
-        if (retval != 0)
-                printk("cfe_start_cpu(%i) returned %i\n" , cpu, retval);
-}
-
-/*
- * Code to run on secondary just after probing the CPU
- */
-void __cpuinit prom_init_secondary(void)
-{
-#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
-        extern void bcm1480_smp_init(void);
-        bcm1480_smp_init();
-#elif defined(CONFIG_SIBYTE_SB1250)
-        extern void sb1250_smp_init(void);
-        sb1250_smp_init();
-#else
-#error invalid SMP configuration
-#endif
-}
-
-/*
- * Do any tidying up before marking online and running the idle
- * loop
- */
-void __cpuinit prom_smp_finish(void)
-{
-#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
-        extern void bcm1480_smp_finish(void);
-        bcm1480_smp_finish();
-#elif defined(CONFIG_SIBYTE_SB1250)
-        extern void sb1250_smp_finish(void);
-        sb1250_smp_finish();
-#else
-#error invalid SMP configuration
-#endif
-}
-
-/*
- * Final cleanup after all secondaries booted
- */
-void prom_cpus_done(void)
-{
-}
diff --git a/arch/mips/sibyte/sb1250/smp.c b/arch/mips/sibyte/sb1250/smp.c
index 3f52c95a4eb8..0734b933e969 100644
--- a/arch/mips/sibyte/sb1250/smp.c
+++ b/arch/mips/sibyte/sb1250/smp.c
@@ -24,6 +24,7 @@
 
 #include <asm/mmu_context.h>
 #include <asm/io.h>
+#include <asm/fw/cfe/cfe_api.h>
 #include <asm/sibyte/sb1250.h>
 #include <asm/sibyte/sb1250_regs.h>
 #include <asm/sibyte/sb1250_int.h>
@@ -55,7 +56,43 @@ void __cpuinit sb1250_smp_init(void)
         change_c0_status(ST0_IM, imask);
 }
 
-void __cpuinit sb1250_smp_finish(void)
+/*
+ * These are routines for dealing with the sb1250 smp capabilities
+ * independent of board/firmware
+ */
+
+/*
+ * Simple enough; everything is set up, so just poke the appropriate mailbox
+ * register, and we should be set
+ */
+static void sb1250_send_ipi_single(int cpu, unsigned int action)
+{
+        __raw_writeq((((u64)action) << 48), mailbox_set_regs[cpu]);
+}
+
+static inline void sb1250_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+        unsigned int i;
+
+        for_each_cpu_mask(i, mask)
+                sb1250_send_ipi_single(i, action);
+}
+
+/*
+ * Code to run on secondary just after probing the CPU
+ */
+static void __cpuinit sb1250_init_secondary(void)
+{
+        extern void sb1250_smp_init(void);
+
+        sb1250_smp_init();
+}
+
+/*
+ * Do any tidying up before marking online and running the idle
+ * loop
+ */
+static void __cpuinit sb1250_smp_finish(void)
 {
         extern void sb1250_clockevent_init(void);
 
@@ -64,19 +101,68 @@ void __cpuinit sb1250_smp_finish(void)
 }
 
 /*
- * These are routines for dealing with the sb1250 smp capabilities
- * independent of board/firmware
+ * Final cleanup after all secondaries booted
  */
+static void sb1250_cpus_done(void)
+{
+}
 
 /*
- * Simple enough; everything is set up, so just poke the appropriate mailbox
- * register, and we should be set
+ * Setup the PC, SP, and GP of a secondary processor and start it
+ * running!
  */
-void core_send_ipi(int cpu, unsigned int action)
+static void __cpuinit sb1250_boot_secondary(int cpu, struct task_struct *idle)
 {
-        __raw_writeq((((u64)action) << 48), mailbox_set_regs[cpu]);
+        int retval;
+
+        retval = cfe_cpu_start(cpu_logical_map(cpu), &smp_bootstrap,
+                               __KSTK_TOS(idle),
+                               (unsigned long)task_thread_info(idle), 0);
+        if (retval != 0)
+                printk("cfe_start_cpu(%i) returned %i\n" , cpu, retval);
 }
 
+/*
+ * Use CFE to find out how many CPUs are available, setting up
+ * phys_cpu_present_map and the logical/physical mappings.
+ * XXXKW will the boot CPU ever not be physical 0?
+ *
+ * Common setup before any secondaries are started
+ */
+static void __init sb1250_smp_setup(void)
+{
+        int i, num;
+
+        cpus_clear(phys_cpu_present_map);
+        cpu_set(0, phys_cpu_present_map);
+        __cpu_number_map[0] = 0;
+        __cpu_logical_map[0] = 0;
+
+        for (i = 1, num = 0; i < NR_CPUS; i++) {
+                if (cfe_cpu_stop(i) == 0) {
+                        cpu_set(i, phys_cpu_present_map);
+                        __cpu_number_map[i] = ++num;
+                        __cpu_logical_map[num] = i;
+                }
+        }
+        printk(KERN_INFO "Detected %i available secondary CPU(s)\n", num);
+}
+
+static void __init sb1250_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+struct plat_smp_ops sb_smp_ops = {
+        .send_ipi_single        = sb1250_send_ipi_single,
+        .send_ipi_mask          = sb1250_send_ipi_mask,
+        .init_secondary         = sb1250_init_secondary,
+        .smp_finish             = sb1250_smp_finish,
+        .cpus_done              = sb1250_cpus_done,
+        .boot_secondary         = sb1250_boot_secondary,
+        .smp_setup              = sb1250_smp_setup,
+        .prepare_cpus           = sb1250_prepare_cpus,
+};
+
 void sb1250_mailbox_interrupt(void)
 {
         int cpu = smp_processor_id();
diff --git a/arch/mips/sni/Makefile b/arch/mips/sni/Makefile
index 3a99cd62c0bd..a7dbeebe7fe6 100644
--- a/arch/mips/sni/Makefile
+++ b/arch/mips/sni/Makefile
@@ -3,6 +3,6 @@
 #
 
 obj-y += irq.o reset.o setup.o a20r.o rm200.o pcimt.o pcit.o time.o
-obj-$(CONFIG_CPU_BIG_ENDIAN) += sniprom.o
+obj-$(CONFIG_EISA) += eisa.o
 
 EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c
index b74607599971..3f8cf5eb2f06 100644
--- a/arch/mips/sni/a20r.c
+++ b/arch/mips/sni/a20r.c
@@ -117,10 +117,19 @@ static struct resource sc26xx_rsrc[] = {
         }
 };
 
+static unsigned int sc26xx_data[2] = {
+        /* DTR   |   RTS    |   DSR    |   CTS     |   DCD     |   RI    */
+        (8 << 0) | (4 << 4) | (6 << 8) | (0 << 12) | (6 << 16) | (0 << 20),
+        (3 << 0) | (2 << 4) | (1 << 8) | (2 << 12) | (3 << 16) | (4 << 20)
+};
+
 static struct platform_device sc26xx_pdev = {
         .name           = "SC26xx",
         .num_resources  = ARRAY_SIZE(sc26xx_rsrc),
-        .resource       = sc26xx_rsrc
+        .resource       = sc26xx_rsrc,
+        .dev                    = {
+                .platform_data  = sc26xx_data,
+        }
 };
 
 static u32 a20r_ack_hwint(void)
@@ -231,9 +240,9 @@ static int __init snirm_a20r_setup_devinit(void)
                 platform_device_register(&sc26xx_pdev);
                 platform_device_register(&a20r_serial8250_device);
                 platform_device_register(&a20r_ds1216_device);
+                sni_eisa_root_init();
                 break;
         }
-
         return 0;
 }
 
diff --git a/arch/mips/sni/eisa.c b/arch/mips/sni/eisa.c
new file mode 100644
index 000000000000..7396cd719900
--- /dev/null
+++ b/arch/mips/sni/eisa.c
@@ -0,0 +1,50 @@
+/*
+ * Virtual EISA root driver.
+ * Acts as a placeholder if we don't have a proper EISA bridge.
+ *
+ * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
+ * modified for SNI usage by Thomas Bogendoerfer
+ *
+ * This code is released under the GPL version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/eisa.h>
+#include <linux/init.h>
+
+/* The default EISA device parent (virtual root device).
+ * Now use a platform device, since that's the obvious choice. */
+
+static struct platform_device eisa_root_dev = {
+        .name = "eisa",
+        .id   = 0,
+};
+
+static struct eisa_root_device eisa_bus_root = {
+        .dev           = &eisa_root_dev.dev,
+        .bus_base_addr = 0,
+        .res           = &ioport_resource,
+        .slots         = EISA_MAX_SLOTS,
+        .dma_mask      = 0xffffffff,
+        .force_probe   = 1,
+};
+
+int __init sni_eisa_root_init(void)
+{
+        int r;
+
+        r = platform_device_register(&eisa_root_dev);
+        if (!r)
+                return r;
+
+        eisa_root_dev.dev.driver_data = &eisa_bus_root;
+
+        if (eisa_root_register(&eisa_bus_root)) {
+                /* A real bridge may have been registered before
+                 * us. So quietly unregister. */
+                platform_device_unregister(&eisa_root_dev);
+                return -1;
+        }
+        return 0;
+}
diff --git a/arch/mips/sni/irq.c b/arch/mips/sni/irq.c
index 9ccffdfb8289..e8e72bb3a9af 100644
--- a/arch/mips/sni/irq.c
+++ b/arch/mips/sni/irq.c
@@ -35,14 +35,14 @@ static irqreturn_t sni_isa_irq_handler(int dummy, void *p)
         if (unlikely(irq < 0))
                 return IRQ_NONE;
 
-        do_IRQ(irq);
+        generic_handle_irq(irq);
         return IRQ_HANDLED;
 }
 
 struct irqaction sni_isa_irq = {
         .handler = sni_isa_irq_handler,
         .name = "ISA",
-        .flags = IRQF_SHARED
+        .flags = IRQF_SHARED | IRQF_DISABLED
 };
 
 /*
diff --git a/arch/mips/sni/pcit.c b/arch/mips/sni/pcit.c
index 416f397c768b..e5f12cf96e8e 100644
--- a/arch/mips/sni/pcit.c
+++ b/arch/mips/sni/pcit.c
@@ -76,6 +76,11 @@ static struct platform_device pcit_cmos_device = {
         .resource       = pcit_cmos_rsrc
 };
 
+static struct platform_device pcit_pcspeaker_pdev = {
+        .name           = "pcspkr",
+        .id             = -1,
+};
+
 static struct resource sni_io_resource = {
         .start  = 0x00000000UL,
         .end    = 0x03bfffffUL,
@@ -277,11 +282,13 @@ static int __init snirm_pcit_setup_devinit(void)
         case SNI_BRD_PCI_TOWER:
                 platform_device_register(&pcit_serial8250_device);
                 platform_device_register(&pcit_cmos_device);
+                platform_device_register(&pcit_pcspeaker_pdev);
                 break;
 
         case SNI_BRD_PCI_TOWER_CPLUS:
                 platform_device_register(&pcit_cplus_serial8250_device);
                 platform_device_register(&pcit_cmos_device);
+                platform_device_register(&pcit_pcspeaker_pdev);
                 break;
         }
         return 0;
diff --git a/arch/mips/sni/rm200.c b/arch/mips/sni/rm200.c
index 67b061eef6cd..5310aa75afa4 100644
--- a/arch/mips/sni/rm200.c
+++ b/arch/mips/sni/rm200.c
@@ -5,30 +5,36 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ * Copyright (C) 2006,2007 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ *
+ * i8259 parts ripped out of arch/mips/kernel/i8259.c
  */
 
+#include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/serial_8250.h>
+#include <linux/io.h>
 
 #include <asm/sni.h>
 #include <asm/time.h>
 #include <asm/irq_cpu.h>
 
-#define PORT(_base,_irq)                                \
+#define RM200_I8259A_IRQ_BASE 32
+
+#define MEMPORT(_base,_irq)                             \
         {                                               \
-                .iobase         = _base,                \
+                .mapbase        = _base,                \
                 .irq            = _irq,                 \
                 .uartclk        = 1843200,              \
-                .iotype         = UPIO_PORT,            \
-                .flags          = UPF_BOOT_AUTOCONF,    \
+                .iotype         = UPIO_MEM,             \
+                .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP, \
         }
 
 static struct plat_serial8250_port rm200_data[] = {
-        PORT(0x3f8, 4),
-        PORT(0x2f8, 3),
+        MEMPORT(0x160003f8, RM200_I8259A_IRQ_BASE + 4),
+        MEMPORT(0x160002f8, RM200_I8259A_IRQ_BASE + 3),
         { },
 };
 
@@ -112,15 +118,311 @@ static int __init snirm_setup_devinit(void)
                 platform_device_register(&rm200_ds1216_device);
                 platform_device_register(&snirm_82596_rm200_pdev);
                 platform_device_register(&snirm_53c710_rm200_pdev);
+                sni_eisa_root_init();
         }
         return 0;
 }
 
 device_initcall(snirm_setup_devinit);
 
+/*
+ * RM200 has an ISA and an EISA bus. The iSA bus is only used
+ * for onboard devices and also has twi i8259 PICs. Since these
+ * PICs are no accessible via inb/outb the following code uses
+ * readb/writeb to access them
+ */
+
+DEFINE_SPINLOCK(sni_rm200_i8259A_lock);
+#define PIC_CMD    0x00
+#define PIC_IMR    0x01
+#define PIC_ISR    PIC_CMD
+#define PIC_POLL   PIC_ISR
+#define PIC_OCW3   PIC_ISR
+
+/* i8259A PIC related value */
+#define PIC_CASCADE_IR          2
+#define MASTER_ICW4_DEFAULT     0x01
+#define SLAVE_ICW4_DEFAULT      0x01
+
+/*
+ * This contains the irq mask for both 8259A irq controllers,
+ */
+static unsigned int rm200_cached_irq_mask = 0xffff;
+static __iomem u8 *rm200_pic_master;
+static __iomem u8 *rm200_pic_slave;
+
+#define cached_master_mask      (rm200_cached_irq_mask)
+#define cached_slave_mask       (rm200_cached_irq_mask >> 8)
+
+static void sni_rm200_disable_8259A_irq(unsigned int irq)
+{
+        unsigned int mask;
+        unsigned long flags;
+
+        irq -= RM200_I8259A_IRQ_BASE;
+        mask = 1 << irq;
+        spin_lock_irqsave(&sni_rm200_i8259A_lock, flags);
+        rm200_cached_irq_mask |= mask;
+        if (irq & 8)
+                writeb(cached_slave_mask, rm200_pic_slave + PIC_IMR);
+        else
+                writeb(cached_master_mask, rm200_pic_master + PIC_IMR);
+        spin_unlock_irqrestore(&sni_rm200_i8259A_lock, flags);
+}
+
+static void sni_rm200_enable_8259A_irq(unsigned int irq)
+{
+        unsigned int mask;
+        unsigned long flags;
+
+        irq -= RM200_I8259A_IRQ_BASE;
+        mask = ~(1 << irq);
+        spin_lock_irqsave(&sni_rm200_i8259A_lock, flags);
+        rm200_cached_irq_mask &= mask;
+        if (irq & 8)
+                writeb(cached_slave_mask, rm200_pic_slave + PIC_IMR);
+        else
+                writeb(cached_master_mask, rm200_pic_master + PIC_IMR);
+        spin_unlock_irqrestore(&sni_rm200_i8259A_lock, flags);
+}
+
+static inline int sni_rm200_i8259A_irq_real(unsigned int irq)
+{
+        int value;
+        int irqmask = 1 << irq;
+
+        if (irq < 8) {
+                writeb(0x0B, rm200_pic_master + PIC_CMD);
+                value = readb(rm200_pic_master + PIC_CMD) & irqmask;
+                writeb(0x0A, rm200_pic_master + PIC_CMD);
+                return value;
+        }
+        writeb(0x0B, rm200_pic_slave + PIC_CMD); /* ISR register */
+        value = readb(rm200_pic_slave + PIC_CMD) & (irqmask >> 8);
+        writeb(0x0A, rm200_pic_slave + PIC_CMD);
+        return value;
+}
+
+/*
+ * Careful! The 8259A is a fragile beast, it pretty
+ * much _has_ to be done exactly like this (mask it
+ * first, _then_ send the EOI, and the order of EOI
+ * to the two 8259s is important!
+ */
+void sni_rm200_mask_and_ack_8259A(unsigned int irq)
+{
+        unsigned int irqmask;
+        unsigned long flags;
+
+        irq -= RM200_I8259A_IRQ_BASE;
+        irqmask = 1 << irq;
+        spin_lock_irqsave(&sni_rm200_i8259A_lock, flags);
+        /*
+         * Lightweight spurious IRQ detection. We do not want
+         * to overdo spurious IRQ handling - it's usually a sign
+         * of hardware problems, so we only do the checks we can
+         * do without slowing down good hardware unnecessarily.
+         *
+         * Note that IRQ7 and IRQ15 (the two spurious IRQs
+         * usually resulting from the 8259A-1|2 PICs) occur
+         * even if the IRQ is masked in the 8259A. Thus we
+         * can check spurious 8259A IRQs without doing the
+         * quite slow i8259A_irq_real() call for every IRQ.
+         * This does not cover 100% of spurious interrupts,
+         * but should be enough to warn the user that there
+         * is something bad going on ...
+         */
+        if (rm200_cached_irq_mask & irqmask)
+                goto spurious_8259A_irq;
+        rm200_cached_irq_mask |= irqmask;
+
+handle_real_irq:
+        if (irq & 8) {
+                readb(rm200_pic_slave + PIC_IMR);
+                writeb(cached_slave_mask, rm200_pic_slave + PIC_IMR);
+                writeb(0x60+(irq & 7), rm200_pic_slave + PIC_CMD);
+                writeb(0x60+PIC_CASCADE_IR, rm200_pic_master + PIC_CMD);
+        } else {
+                readb(rm200_pic_master + PIC_IMR);
+                writeb(cached_master_mask, rm200_pic_master + PIC_IMR);
+                writeb(0x60+irq, rm200_pic_master + PIC_CMD);
+        }
+        spin_unlock_irqrestore(&sni_rm200_i8259A_lock, flags);
+        return;
+
+spurious_8259A_irq:
+        /*
+         * this is the slow path - should happen rarely.
+         */
+        if (sni_rm200_i8259A_irq_real(irq))
+                /*
+                 * oops, the IRQ _is_ in service according to the
+                 * 8259A - not spurious, go handle it.
+                 */
+                goto handle_real_irq;
+
+        {
+                static int spurious_irq_mask;
+                /*
+                 * At this point we can be sure the IRQ is spurious,
+                 * lets ACK and report it. [once per IRQ]
+                 */
+                if (!(spurious_irq_mask & irqmask)) {
+                        printk(KERN_DEBUG
+                               "spurious RM200 8259A interrupt: IRQ%d.\n", irq);
+                        spurious_irq_mask |= irqmask;
+                }
+                atomic_inc(&irq_err_count);
+                /*
+                 * Theoretically we do not have to handle this IRQ,
+                 * but in Linux this does not cause problems and is
+                 * simpler for us.
+                 */
+                goto handle_real_irq;
+        }
+}
+
+static struct irq_chip sni_rm200_i8259A_chip = {
+        .name           = "RM200-XT-PIC",
+        .mask           = sni_rm200_disable_8259A_irq,
+        .unmask         = sni_rm200_enable_8259A_irq,
+        .mask_ack       = sni_rm200_mask_and_ack_8259A,
+};
+
+/*
+ * Do the traditional i8259 interrupt polling thing.  This is for the few
+ * cases where no better interrupt acknowledge method is available and we
+ * absolutely must touch the i8259.
+ */
+static inline int sni_rm200_i8259_irq(void)
+{
+        int irq;
+
+        spin_lock(&sni_rm200_i8259A_lock);
+
+        /* Perform an interrupt acknowledge cycle on controller 1. */
+        writeb(0x0C, rm200_pic_master + PIC_CMD);       /* prepare for poll */
+        irq = readb(rm200_pic_master + PIC_CMD) & 7;
+        if (irq == PIC_CASCADE_IR) {
+                /*
+                 * Interrupt is cascaded so perform interrupt
+                 * acknowledge on controller 2.
+                 */
+                writeb(0x0C, rm200_pic_slave + PIC_CMD); /* prepare for poll */
+                irq = (readb(rm200_pic_slave + PIC_CMD) & 7) + 8;
+        }
+
+        if (unlikely(irq == 7)) {
+                /*
+                 * This may be a spurious interrupt.
+                 *
+                 * Read the interrupt status register (ISR). If the most
+                 * significant bit is not set then there is no valid
+                 * interrupt.
+                 */
+                writeb(0x0B, rm200_pic_master + PIC_ISR); /* ISR register */
+                if (~readb(rm200_pic_master + PIC_ISR) & 0x80)
+                        irq = -1;
+        }
+
+        spin_unlock(&sni_rm200_i8259A_lock);
+
+        return likely(irq >= 0) ? irq + RM200_I8259A_IRQ_BASE : irq;
+}
+
+void sni_rm200_init_8259A(void)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&sni_rm200_i8259A_lock, flags);
+
+        writeb(0xff, rm200_pic_master + PIC_IMR);
+        writeb(0xff, rm200_pic_slave + PIC_IMR);
+
+        writeb(0x11, rm200_pic_master + PIC_CMD);
+        writeb(0, rm200_pic_master + PIC_IMR);
+        writeb(1U << PIC_CASCADE_IR, rm200_pic_master + PIC_IMR);
+        writeb(MASTER_ICW4_DEFAULT, rm200_pic_master + PIC_IMR);
+        writeb(0x11, rm200_pic_slave + PIC_CMD);
+        writeb(8, rm200_pic_slave + PIC_IMR);
+        writeb(PIC_CASCADE_IR, rm200_pic_slave + PIC_IMR);
+        writeb(SLAVE_ICW4_DEFAULT, rm200_pic_slave + PIC_IMR);
+        udelay(100);            /* wait for 8259A to initialize */
+
+        writeb(cached_master_mask, rm200_pic_master + PIC_IMR);
+        writeb(cached_slave_mask, rm200_pic_slave + PIC_IMR);
+
+        spin_unlock_irqrestore(&sni_rm200_i8259A_lock, flags);
+}
+
+/*
+ * IRQ2 is cascade interrupt to second interrupt controller
+ */
+static struct irqaction sni_rm200_irq2 = {
+        no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL
+};
+
+static struct resource sni_rm200_pic1_resource = {
+        .name = "onboard ISA pic1",
+        .start = 0x16000020,
+        .end = 0x16000023,
+        .flags = IORESOURCE_BUSY
+};
+
+static struct resource sni_rm200_pic2_resource = {
+        .name = "onboard ISA pic2",
+        .start = 0x160000a0,
+        .end = 0x160000a3,
+        .flags = IORESOURCE_BUSY
+};
+
+/* ISA irq handler */
+static irqreturn_t sni_rm200_i8259A_irq_handler(int dummy, void *p)
+{
+        int irq;
+
+        irq = sni_rm200_i8259_irq();
+        if (unlikely(irq < 0))
+                return IRQ_NONE;
+
+        do_IRQ(irq);
+        return IRQ_HANDLED;
+}
+
+struct irqaction sni_rm200_i8259A_irq = {
+        .handler = sni_rm200_i8259A_irq_handler,
+        .name = "onboard ISA",
+        .flags = IRQF_SHARED
+};
+
+void __init sni_rm200_i8259_irqs(void)
+{
+        int i;
+
+        rm200_pic_master = ioremap_nocache(0x16000020, 4);
+        if (!rm200_pic_master)
+                return;
+        rm200_pic_slave = ioremap_nocache(0x160000a0, 4);
+        if (!rm200_pic_master) {
+                iounmap(rm200_pic_master);
+                return;
+        }
+
+        insert_resource(&iomem_resource, &sni_rm200_pic1_resource);
+        insert_resource(&iomem_resource, &sni_rm200_pic2_resource);
+
+        sni_rm200_init_8259A();
+
+        for (i = RM200_I8259A_IRQ_BASE; i < RM200_I8259A_IRQ_BASE + 16; i++)
+                set_irq_chip_and_handler(i, &sni_rm200_i8259A_chip,
+                                         handle_level_irq);
+
+        setup_irq(RM200_I8259A_IRQ_BASE + PIC_CASCADE_IR, &sni_rm200_irq2);
+}
+
 
-#define SNI_RM200_INT_STAT_REG  0xbc000000
-#define SNI_RM200_INT_ENA_REG   0xbc080000
+#define SNI_RM200_INT_STAT_REG  CKSEG1ADDR(0xbc000000)
+#define SNI_RM200_INT_ENA_REG   CKSEG1ADDR(0xbc080000)
 
 #define SNI_RM200_INT_START  24
 #define SNI_RM200_INT_END    28
@@ -181,17 +483,17 @@ void __init sni_rm200_irq_init(void)
 
         * (volatile u8 *)SNI_RM200_INT_ENA_REG = 0x1f;
 
+        sni_rm200_i8259_irqs();
         mips_cpu_irq_init();
         /* Actually we've got more interrupts to handle ...  */
         for (i = SNI_RM200_INT_START; i <= SNI_RM200_INT_END; i++)
                 set_irq_chip(i, &rm200_irq_type);
         sni_hwint = sni_rm200_hwint;
         change_c0_status(ST0_IM, IE_IRQ0);
-        setup_irq(SNI_RM200_INT_START + 0, &sni_isa_irq);
+        setup_irq(SNI_RM200_INT_START + 0, &sni_rm200_i8259A_irq);
+        setup_irq(SNI_RM200_INT_START + 1, &sni_isa_irq);
 }
 
 void __init sni_rm200_init(void)
 {
-        set_io_port_base(SNI_PORT_BASE + 0x02000000);
-        ioport_resource.end += 0x02000000;
 }
diff --git a/arch/mips/sni/setup.c b/arch/mips/sni/setup.c
index e8b26bdee24c..5484e1c62054 100644
--- a/arch/mips/sni/setup.c
+++ b/arch/mips/sni/setup.c
@@ -19,11 +19,17 @@
 #include <asm/sgialib.h>
 #endif
 
+#ifdef CONFIG_SNIPROM
+#include <asm/mipsprom.h>
+#endif
+
+#include <asm/bootinfo.h>
 #include <asm/io.h>
 #include <asm/reboot.h>
 #include <asm/sni.h>
 
 unsigned int sni_brd_type;
+EXPORT_SYMBOL(sni_brd_type);
 
 extern void sni_machine_restart(char *command);
 extern void sni_machine_power_off(void);
@@ -47,20 +53,152 @@ static void __init sni_display_setup(void)
 #endif
 }
 
+static void __init sni_console_setup(void)
+{
+#ifndef CONFIG_ARC
+        char *ctype;
+        char *cdev;
+        char *baud;
+        int port;
+        static char options[8];
+
+        cdev = prom_getenv("console_dev");
+        if (strncmp(cdev, "tty", 3) == 0) {
+                ctype = prom_getenv("console");
+                switch (*ctype) {
+                default:
+                case 'l':
+                        port = 0;
+                        baud = prom_getenv("lbaud");
+                        break;
+                case 'r':
+                        port = 1;
+                        baud = prom_getenv("rbaud");
+                        break;
+                }
+                if (baud)
+                        strcpy(options, baud);
+                if (strncmp(cdev, "tty552", 6) == 0)
+                        add_preferred_console("ttyS", port,
+                                              baud ? options : NULL);
+                else
+                        add_preferred_console("ttySC", port,
+                                              baud ? options : NULL);
+        }
+#endif
+}
+
+#ifdef DEBUG
+static void __init sni_idprom_dump(void)
+{
+        int     i;
+
+        pr_debug("SNI IDProm dump:\n");
+        for (i = 0; i < 256; i++) {
+                if (i%16 == 0)
+                        pr_debug("%04x ", i);
+
+                printk("%02x ", *(unsigned char *) (SNI_IDPROM_BASE + i));
+
+                if (i % 16 == 15)
+                        printk("\n");
+        }
+}
+#endif
 
 void __init plat_mem_setup(void)
 {
+        int cputype;
+
         set_io_port_base(SNI_PORT_BASE);
 //      ioport_resource.end = sni_io_resource.end;
 
         /*
          * Setup (E)ISA I/O memory access stuff
          */
-        isa_slot_offset = 0xb0000000;
+        isa_slot_offset = CKSEG1ADDR(0xb0000000);
 #ifdef CONFIG_EISA
         EISA_bus = 1;
 #endif
 
+        sni_brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
+        cputype = *(unsigned char *)SNI_IDPROM_CPUTYPE;
+        switch (sni_brd_type) {
+        case SNI_BRD_TOWER_OASIC:
+                switch (cputype) {
+                case SNI_CPU_M8030:
+                        system_type = "RM400-330";
+                        break;
+                case SNI_CPU_M8031:
+                        system_type = "RM400-430";
+                        break;
+                case SNI_CPU_M8037:
+                        system_type = "RM400-530";
+                        break;
+                case SNI_CPU_M8034:
+                        system_type = "RM400-730";
+                        break;
+                default:
+                        system_type = "RM400-xxx";
+                        break;
+                }
+                break;
+        case SNI_BRD_MINITOWER:
+                switch (cputype) {
+                case SNI_CPU_M8021:
+                case SNI_CPU_M8043:
+                        system_type = "RM400-120";
+                        break;
+                case SNI_CPU_M8040:
+                        system_type = "RM400-220";
+                        break;
+                case SNI_CPU_M8053:
+                        system_type = "RM400-225";
+                        break;
+                case SNI_CPU_M8050:
+                        system_type = "RM400-420";
+                        break;
+                default:
+                        system_type = "RM400-xxx";
+                        break;
+                }
+                break;
+        case SNI_BRD_PCI_TOWER:
+                system_type = "RM400-Cxx";
+                break;
+        case SNI_BRD_RM200:
+                system_type = "RM200-xxx";
+                break;
+        case SNI_BRD_PCI_MTOWER:
+                system_type = "RM300-Cxx";
+                break;
+        case SNI_BRD_PCI_DESKTOP:
+                switch (read_c0_prid() & 0xff00) {
+                case PRID_IMP_R4600:
+                case PRID_IMP_R4700:
+                        system_type = "RM200-C20";
+                        break;
+                case PRID_IMP_R5000:
+                        system_type = "RM200-C40";
+                        break;
+                default:
+                        system_type = "RM200-Cxx";
+                        break;
+                }
+                break;
+        case SNI_BRD_PCI_TOWER_CPLUS:
+                system_type = "RM400-Exx";
+                break;
+        case SNI_BRD_PCI_MTOWER_CPLUS:
+                system_type = "RM300-Exx";
+                break;
+        }
+        pr_debug("Found SNI brdtype %02x name %s\n", sni_brd_type, system_type);
+
+#ifdef DEBUG
+        sni_idprom_dump();
+#endif
+
         switch (sni_brd_type) {
         case SNI_BRD_10:
         case SNI_BRD_10NEW:
@@ -89,9 +227,10 @@ void __init plat_mem_setup(void)
         pm_power_off = sni_machine_power_off;
 
         sni_display_setup();
+        sni_console_setup();
 }
 
-#if CONFIG_PCI
+#ifdef CONFIG_PCI
 
 #include <linux/pci.h>
 #include <video/vga.h>
diff --git a/arch/mips/sni/sniprom.c b/arch/mips/sni/sniprom.c
deleted file mode 100644
index eff4b89d7b75..000000000000
--- a/arch/mips/sni/sniprom.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/*
- * Big Endian PROM code for SNI RM machines
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org)
- * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
- */
-
-#define DEBUG
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/console.h>
-
-#include <asm/addrspace.h>
-#include <asm/sni.h>
-#include <asm/mipsprom.h>
-#include <asm/mipsregs.h>
-#include <asm/bootinfo.h>
-
-/* special SNI prom calls */
-/*
- * This does not exist in all proms - SINIX compares
- * the prom env variable "version" against "2.0008"
- * or greater. If lesser it tries to probe interesting
- * registers
- */
-#define PROM_GET_MEMCONF        58
-
-#define PROM_VEC                (u64 *)CKSEG1ADDR(0x1fc00000)
-#define PROM_ENTRY(x)           (PROM_VEC + (x))
-
-
-static int *(*__prom_putchar)(int)        = (int *(*)(int))PROM_ENTRY(PROM_PUTCHAR);
-
-void prom_putchar(char c)
-{
-        __prom_putchar(c);
-}
-
-static char *(*__prom_getenv)(char *)     = (char *(*)(char *))PROM_ENTRY(PROM_GETENV);
-static void (*__prom_get_memconf)(void *) = (void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF);
-
-char *prom_getenv(char *s)
-{
-        return __prom_getenv(s);
-}
-
-void __init prom_free_prom_memory(void)
-{
-}
-
-/*
- * /proc/cpuinfo system type
- *
- */
-static const char *systype = "Unknown";
-const char *get_system_type(void)
-{
-        return systype;
-}
-
-#define SNI_IDPROM_BASE                0xbff00000
-#define SNI_IDPROM_MEMSIZE             (SNI_IDPROM_BASE+0x28)  /* Memsize in 16MB quantities */
-#define SNI_IDPROM_BRDTYPE             (SNI_IDPROM_BASE+0x29)  /* Board Type */
-#define SNI_IDPROM_CPUTYPE             (SNI_IDPROM_BASE+0x30)  /* CPU Type */
-
-#define SNI_IDPROM_SIZE 0x1000
-
-#ifdef DEBUG
-static void __init sni_idprom_dump(void)
-{
-        int     i;
-
-        pr_debug("SNI IDProm dump:\n");
-        for (i = 0; i < 256; i++) {
-                if (i%16 == 0)
-                        pr_debug("%04x ", i);
-
-                printk("%02x ", *(unsigned char *) (SNI_IDPROM_BASE + i));
-
-                if (i % 16 == 15)
-                        printk("\n");
-        }
-}
-#endif
-
-static void __init sni_mem_init(void )
-{
-        int i, memsize;
-        struct membank {
-                u32             size;
-                u32             base;
-                u32             size2;
-                u32             pad1;
-                u32             pad2;
-        } memconf[8];
-
-        /* MemSIZE from prom in 16MByte chunks */
-        memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
-
-        pr_debug("IDProm memsize: %lu MByte\n", memsize);
-
-        /* get memory bank layout from prom */
-        __prom_get_memconf(&memconf);
-
-        pr_debug("prom_get_mem_conf memory configuration:\n");
-        for (i = 0;i < 8 && memconf[i].size; i++) {
-                if (sni_brd_type == SNI_BRD_PCI_TOWER ||
-                    sni_brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
-                        if (memconf[i].base >= 0x20000000 &&
-                            memconf[i].base <  0x30000000) {
-                                memconf[i].base -= 0x20000000;
-                        }
-        }
-                pr_debug("Bank%d: %08x @ %08x\n", i,
-                        memconf[i].size, memconf[i].base);
-                add_memory_region(memconf[i].base, memconf[i].size, BOOT_MEM_RAM);
-        }
-}
-
-static void __init sni_console_setup(void)
-{
-        char *ctype;
-        char *cdev;
-        char *baud;
-        int port;
-        static char options[8];
-
-        cdev = prom_getenv("console_dev");
-        if (strncmp (cdev, "tty", 3) == 0) {
-                ctype = prom_getenv("console");
-                switch (*ctype) {
-                default:
-                case 'l':
-                        port = 0;
-                        baud = prom_getenv("lbaud");
-                        break;
-                case 'r':
-                        port = 1;
-                        baud = prom_getenv("rbaud");
-                        break;
-                }
-                if (baud)
-                        strcpy(options, baud);
-                if (strncmp (cdev, "tty552", 6) == 0)
-                        add_preferred_console("ttyS", port, baud ? options : NULL);
-                else
-                        add_preferred_console("ttySC", port, baud ? options : NULL);
-        }
-}
-
-void __init prom_init(void)
-{
-        int argc = fw_arg0;
-        char **argv = (void *)fw_arg1;
-        int i;
-        int cputype;
-
-        sni_brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
-        cputype = *(unsigned char *)SNI_IDPROM_CPUTYPE;
-        switch (sni_brd_type) {
-        case SNI_BRD_TOWER_OASIC:
-                switch (cputype) {
-                case SNI_CPU_M8030:
-                        systype = "RM400-330";
-                        break;
-                case SNI_CPU_M8031:
-                        systype = "RM400-430";
-                        break;
-                case SNI_CPU_M8037:
-                        systype = "RM400-530";
-                        break;
-                case SNI_CPU_M8034:
-                        systype = "RM400-730";
-                        break;
-                default:
-                        systype = "RM400-xxx";
-                        break;
-                }
-                break;
-        case SNI_BRD_MINITOWER:
-                switch (cputype) {
-                case SNI_CPU_M8021:
-                case SNI_CPU_M8043:
-                        systype = "RM400-120";
-                        break;
-                case SNI_CPU_M8040:
-                        systype = "RM400-220";
-                        break;
-                case SNI_CPU_M8053:
-                        systype = "RM400-225";
-                        break;
-                case SNI_CPU_M8050:
-                        systype = "RM400-420";
-                        break;
-                default:
-                        systype = "RM400-xxx";
-                        break;
-                }
-                break;
-        case SNI_BRD_PCI_TOWER:
-                systype = "RM400-Cxx";
-                break;
-        case SNI_BRD_RM200:
-                systype = "RM200-xxx";
-                break;
-        case SNI_BRD_PCI_MTOWER:
-                systype = "RM300-Cxx";
-                break;
-        case SNI_BRD_PCI_DESKTOP:
-                switch (read_c0_prid() & 0xff00) {
-                case PRID_IMP_R4600:
-                case PRID_IMP_R4700:
-                        systype = "RM200-C20";
-                        break;
-                case PRID_IMP_R5000:
-                        systype = "RM200-C40";
-                        break;
-                default:
-                        systype = "RM200-Cxx";
-                        break;
-                }
-                break;
-        case SNI_BRD_PCI_TOWER_CPLUS:
-                systype = "RM400-Exx";
-                break;
-        case SNI_BRD_PCI_MTOWER_CPLUS:
-                systype = "RM300-Exx";
-                break;
-        }
-        pr_debug("Found SNI brdtype %02x name %s\n", sni_brd_type, systype);
-
-#ifdef DEBUG
-        sni_idprom_dump();
-#endif
-        sni_mem_init();
-        sni_console_setup();
-
-        /* copy prom cmdline parameters to kernel cmdline */
-        for (i = 1; i < argc; i++) {
-                strcat(arcs_cmdline, argv[i]);
-                if (i < (argc - 1))
-                        strcat(arcs_cmdline, " ");
-        }
-}
-
diff --git a/arch/mips/sni/time.c b/arch/mips/sni/time.c
index 6f339af08d22..796e3ce28720 100644
--- a/arch/mips/sni/time.c
+++ b/arch/mips/sni/time.c
@@ -178,6 +178,7 @@ void __init plat_time_init(void)
                 sni_a20r_timer_setup();
                 break;
         }
+        setup_pit_timer();
 }
 
 unsigned long read_persistent_clock(void)
diff --git a/arch/mips/tx4927/common/Makefile b/arch/mips/tx4927/common/Makefile
index 18375787e094..a7fe76a64964 100644
--- a/arch/mips/tx4927/common/Makefile
+++ b/arch/mips/tx4927/common/Makefile
@@ -1,12 +1,8 @@
 #
 # Makefile for common code for Toshiba TX4927 based systems
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
 
-obj-y   += tx4927_prom.o tx4927_setup.o tx4927_irq.o
+obj-y   += tx4927_prom.o tx4927_irq.o
 
 obj-$(CONFIG_TOSHIBA_FPCIB0)       += smsc_fdc37m81x.o
 obj-$(CONFIG_KGDB)                 += tx4927_dbgio.o
diff --git a/arch/mips/tx4927/common/tx4927_setup.c b/arch/mips/tx4927/common/tx4927_setup.c
deleted file mode 100644
index 36c5f200eb3d..000000000000
--- a/arch/mips/tx4927/common/tx4927_setup.c
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * Author: MontaVista Software, Inc.
- *         source@mvista.com
- *
- * Copyright 2001-2002 MontaVista Software Inc.
- *
- *  This program is free software; you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License as published by the
- *  Free Software Foundation; either version 2 of the License, or (at your
- *  option) any later version.
- *
- *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- */
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/irq.h>
-#include <linux/bitops.h>
-#include <asm/bootinfo.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mipsregs.h>
-#include <asm/system.h>
-#include <asm/time.h>
-#include <asm/tx4927/tx4927.h>
-
-
-#undef DEBUG
-
-void dump_cp0(char *key);
-
-
-void __init plat_mem_setup(void)
-{
-#ifdef CONFIG_TOSHIBA_RBTX4927
-        {
-                extern void toshiba_rbtx4927_setup(void);
-                toshiba_rbtx4927_setup();
-        }
-#endif
-}
-
-void __init plat_time_init(void)
-{
-#ifdef CONFIG_TOSHIBA_RBTX4927
-        {
-                extern void toshiba_rbtx4927_time_init(void);
-                toshiba_rbtx4927_time_init();
-        }
-#endif
-}
-
-#ifdef DEBUG
-void print_cp0(char *key, int num, char *name, u32 val)
-{
-        printk("%s cp0:%02d:%s=0x%08x\n", key, num, name, val);
-        return;
-}
-
-void
-dump_cp0(char *key)
-{
-        if (key == NULL)
-                key = "";
-
-        print_cp0(key, 0, "INDEX   ", read_c0_index());
-        print_cp0(key, 2, "ENTRYLO1", read_c0_entrylo0());
-        print_cp0(key, 3, "ENTRYLO2", read_c0_entrylo1());
-        print_cp0(key, 4, "CONTEXT ", read_c0_context());
-        print_cp0(key, 5, "PAGEMASK", read_c0_pagemask());
-        print_cp0(key, 6, "WIRED   ", read_c0_wired());
-        //print_cp0(key, 8, "BADVADDR",  read_c0_badvaddr());
-        print_cp0(key, 9, "COUNT   ", read_c0_count());
-        print_cp0(key, 10, "ENTRYHI ", read_c0_entryhi());
-        print_cp0(key, 11, "COMPARE ", read_c0_compare());
-        print_cp0(key, 12, "STATUS  ", read_c0_status());
-        print_cp0(key, 13, "CAUSE   ", read_c0_cause() & 0xffff87ff);
-        print_cp0(key, 16, "CONFIG  ", read_c0_config());
-        return;
-}
-
-void print_pic(char *key, unsigned long reg, char *name)
-{
-        printk(KERN_INFO "%s pic:0x%08lx:%s=0x%08x\n", key, reg, name,
-               __raw_readl((void __iomem *)reg));
-        return;
-}
-
-
-void dump_pic(char *key)
-{
-        if (key == NULL)
-                key = "";
-
-        print_pic(key, 0xff1ff600, "IRDEN    ");
-        print_pic(key, 0xff1ff604, "IRDM0    ");
-        print_pic(key, 0xff1ff608, "IRDM1    ");
-
-        print_pic(key, 0xff1ff610, "IRLVL0   ");
-        print_pic(key, 0xff1ff614, "IRLVL1   ");
-        print_pic(key, 0xff1ff618, "IRLVL2   ");
-        print_pic(key, 0xff1ff61c, "IRLVL3   ");
-        print_pic(key, 0xff1ff620, "IRLVL4   ");
-        print_pic(key, 0xff1ff624, "IRLVL5   ");
-        print_pic(key, 0xff1ff628, "IRLVL6   ");
-        print_pic(key, 0xff1ff62c, "IRLVL7   ");
-
-        print_pic(key, 0xff1ff640, "IRMSK    ");
-        print_pic(key, 0xff1ff660, "IREDC    ");
-        print_pic(key, 0xff1ff680, "IRPND    ");
-        print_pic(key, 0xff1ff6a0, "IRCS     ");
-
-        print_pic(key, 0xff1ff514, "IRFLAG1  ");        /* don't read IRLAG0 -- it hangs system */
-
-        print_pic(key, 0xff1ff518, "IRPOL    ");
-        print_pic(key, 0xff1ff51c, "IRRCNT   ");
-        print_pic(key, 0xff1ff520, "IRMASKINT");
-        print_pic(key, 0xff1ff524, "IRMASKEXT");
-
-        return;
-}
-
-
-void print_addr(char *hdr, char *key, unsigned long addr)
-{
-        printk(KERN_INFO "%s %s:0x%08lx=0x%08x\n", hdr, key, addr,
-               __raw_readl((void __iomem *)addr));
-        return;
-}
-
-
-void dump_180(char *key)
-{
-        u32 i;
-
-        for (i = 0x80000180; i < 0x80000180 + 0x80; i += 4) {
-                print_addr("180", key, i);
-        }
-        return;
-}
-
-
-void dump_eh0(char *key)
-{
-        int i;
-        extern unsigned long exception_handlers[];
-
-        for (i = (int) exception_handlers;
-             i < (int) (exception_handlers + 20); i += 4) {
-                print_addr("eh0", key, i);
-        }
-
-        return;
-}
-
-void pk0(void)
-{
-        volatile u32 val;
-
-        __asm__ __volatile__("ori %0, $26, 0":"=r"(val)
-            );
-        printk("k0=[0x%08x]\n", val);
-}
-#endif
diff --git a/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c b/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
index 0299595ce1c4..e466e5e711d8 100644
--- a/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
+++ b/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
@@ -45,27 +45,19 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
 #include <linux/ioport.h>
-#include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/pci.h>
-#include <linux/timex.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 
 #include <asm/bootinfo.h>
-#include <asm/page.h>
 #include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/irq_regs.h>
 #include <asm/processor.h>
 #include <asm/reboot.h>
 #include <asm/time.h>
 #include <asm/txx9tmr.h>
-#include <linux/bootmem.h>
-#include <linux/blkdev.h>
 #ifdef CONFIG_TOSHIBA_FPCIB0
 #include <asm/tx4927/smsc_fdc37m81x.h>
 #endif
@@ -73,42 +65,26 @@
 #ifdef CONFIG_PCI
 #include <asm/tx4927/tx4927_pci.h>
 #endif
-#ifdef CONFIG_BLK_DEV_IDEPCI
-#include <linux/hdreg.h>
-#include <linux/ide.h>
-#endif
 #ifdef CONFIG_SERIAL_TXX9
-#include <linux/tty.h>
-#include <linux/serial.h>
 #include <linux/serial_core.h>
 #endif
 
 #undef TOSHIBA_RBTX4927_SETUP_DEBUG
 
 #ifdef TOSHIBA_RBTX4927_SETUP_DEBUG
-#define TOSHIBA_RBTX4927_SETUP_NONE        0x00000000
-
-#define TOSHIBA_RBTX4927_SETUP_INFO        ( 1 <<  0 )
-#define TOSHIBA_RBTX4927_SETUP_WARN        ( 1 <<  1 )
-#define TOSHIBA_RBTX4927_SETUP_EROR        ( 1 <<  2 )
-
-#define TOSHIBA_RBTX4927_SETUP_EFWFU       ( 1 <<  3 )
 #define TOSHIBA_RBTX4927_SETUP_SETUP       ( 1 <<  4 )
 #define TOSHIBA_RBTX4927_SETUP_PCIBIOS     ( 1 <<  7 )
 #define TOSHIBA_RBTX4927_SETUP_PCI1        ( 1 <<  8 )
 #define TOSHIBA_RBTX4927_SETUP_PCI2        ( 1 <<  9 )
-#define TOSHIBA_RBTX4927_SETUP_PCI66       ( 1 << 10 )
 
 #define TOSHIBA_RBTX4927_SETUP_ALL         0xffffffff
 #endif
 
 #ifdef TOSHIBA_RBTX4927_SETUP_DEBUG
 static const u32 toshiba_rbtx4927_setup_debug_flag =
-    (TOSHIBA_RBTX4927_SETUP_NONE | TOSHIBA_RBTX4927_SETUP_INFO |
-     TOSHIBA_RBTX4927_SETUP_WARN | TOSHIBA_RBTX4927_SETUP_EROR |
-     TOSHIBA_RBTX4927_SETUP_EFWFU | TOSHIBA_RBTX4927_SETUP_SETUP |
+    (TOSHIBA_RBTX4927_SETUP_SETUP |
      | TOSHIBA_RBTX4927_SETUP_PCIBIOS | TOSHIBA_RBTX4927_SETUP_PCI1 |
-     TOSHIBA_RBTX4927_SETUP_PCI2 | TOSHIBA_RBTX4927_SETUP_PCI66);
+     TOSHIBA_RBTX4927_SETUP_PCI2);
 #endif
 
 #ifdef TOSHIBA_RBTX4927_SETUP_DEBUG
@@ -718,7 +694,7 @@ void toshiba_rbtx4927_power_off(void)
         /* no return */
 }
 
-void __init toshiba_rbtx4927_setup(void)
+void __init plat_mem_setup(void)
 {
         int i;
         u32 cp0_config;
@@ -741,13 +717,6 @@ void __init toshiba_rbtx4927_setup(void)
         cp0_config = cp0_config & ~(TX49_CONF_IC | TX49_CONF_DC);
         write_c0_config(cp0_config);
 
-#ifdef TOSHIBA_RBTX4927_SETUP_DEBUG
-        {
-                extern void dump_cp0(char *);
-                dump_cp0("toshiba_rbtx4927_early_fw_fixup");
-        }
-#endif
-
         set_io_port_base(KSEG1 + TBTX4927_ISA_IO_OFFSET);
         TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_SETUP,
                                        ":mips_io_port_base=0x%08lx\n",
@@ -835,6 +804,8 @@ void __init toshiba_rbtx4927_setup(void)
                 }
 
         /* CCFG */
+        /* do reset on watchdog */
+        tx4927_ccfgptr->ccfg |= TX4927_CCFG_WR;
         /* enable Timeout BusError */
         if (tx4927_ccfg_toeon)
                 tx4927_ccfgptr->ccfg |= TX4927_CCFG_TOE;
@@ -936,8 +907,7 @@ void __init toshiba_rbtx4927_setup(void)
                                "+\n");
 }
 
-void __init
-toshiba_rbtx4927_time_init(void)
+void __init plat_time_init(void)
 {
         mips_hpt_frequency = tx4927_cpu_clock / 2;
         if (tx4927_ccfgptr->ccfg & TX4927_CCFG_TINTDIS)
@@ -977,3 +947,55 @@ static int __init rbtx4927_ne_init(void)
         return IS_ERR(dev) ? PTR_ERR(dev) : 0;
 }
 device_initcall(rbtx4927_ne_init);
+
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+        struct resource res = {
+                .start  = base,
+                .end    = base + 0x100 - 1,
+                .flags  = IORESOURCE_MEM,
+        };
+        struct platform_device *dev =
+                platform_device_register_simple("txx9wdt", -1, &res, 1);
+        return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init rbtx4927_wdt_init(void)
+{
+        return txx9_wdt_init(TX4927_TMR_REG(2) & 0xfffffffffULL);
+}
+device_initcall(rbtx4927_wdt_init);
+
+/* Minimum CLK support */
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+        if (!strcmp(id, "imbus_clk"))
+                return (struct clk *)50000000;
+        return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+        return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+        return (unsigned long)clk;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
diff --git a/arch/mips/tx4938/common/Makefile b/arch/mips/tx4938/common/Makefile
index 8352eca67906..56aa1ed1ee0c 100644
--- a/arch/mips/tx4938/common/Makefile
+++ b/arch/mips/tx4938/common/Makefile
@@ -1,12 +1,8 @@
 #
 # Makefile for common code for Toshiba TX4927 based systems
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
 
-obj-y   += prom.o setup.o irq.o
+obj-y   += prom.o irq.o
 obj-$(CONFIG_KGDB) += dbgio.o
 
 EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/tx4938/common/setup.c b/arch/mips/tx4938/common/setup.c
deleted file mode 100644
index 3ba4101d141e..000000000000
--- a/arch/mips/tx4938/common/setup.c
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * linux/arch/mips/tx4938/common/setup.c
- *
- * common tx4938 setup routines
- *
- * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
- */
-
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/irq.h>
-#include <linux/bitops.h>
-#include <asm/bootinfo.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mipsregs.h>
-#include <asm/system.h>
-#include <asm/time.h>
-#include <asm/tx4938/rbtx4938.h>
-
-extern void toshiba_rbtx4938_setup(void);
-
-void __init tx4938_setup(void);
-void dump_cp0(char *key);
-
-void __init
-plat_mem_setup(void)
-{
-        toshiba_rbtx4938_setup();
-}
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/Makefile b/arch/mips/tx4938/toshiba_rbtx4938/Makefile
index 675bb1c3e40c..2316dd7dd1bd 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/Makefile
+++ b/arch/mips/tx4938/toshiba_rbtx4938/Makefile
@@ -1,10 +1,6 @@
 #
 # Makefile for common code for Toshiba TX4927 based systems
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
 
 obj-y   += prom.o setup.o irq.o spi_eeprom.o
 
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/prom.c b/arch/mips/tx4938/toshiba_rbtx4938/prom.c
index 69f21c1b7942..1644bffa501a 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/prom.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/prom.c
@@ -47,7 +47,6 @@ void __init prom_init(void)
 #ifndef CONFIG_TX4938_NAND_BOOT
         prom_init_cmdline();
 #endif
-        mips_machtype = MACH_TOSHIBA_RBTX4938;
 
         msize = tx4938_get_mem_size();
         add_memory_region(0, msize << 20, BOOT_MEM_RAM);
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/setup.c b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
index 632e5d201353..61249f049cd6 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/setup.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
@@ -24,16 +24,12 @@
 
 #include <asm/wbflush.h>
 #include <asm/reboot.h>
-#include <asm/irq.h>
 #include <asm/time.h>
 #include <asm/txx9tmr.h>
-#include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/bootinfo.h>
 #include <asm/tx4938/rbtx4938.h>
 #ifdef CONFIG_SERIAL_TXX9
-#include <linux/tty.h>
-#include <linux/serial.h>
 #include <linux/serial_core.h>
 #endif
 #include <linux/spi/spi.h>
@@ -728,6 +724,8 @@ void __init tx4938_board_setup(void)
         /* CCFG */
         /* clear WatchDogReset,BusErrorOnWrite flag (W1C) */
         tx4938_ccfgptr->ccfg |= TX4938_CCFG_WDRST | TX4938_CCFG_BEOW;
+        /* do reset on watchdog */
+        tx4938_ccfgptr->ccfg |= TX4938_CCFG_WR;
         /* clear PCIC1 reset */
         if (tx4938_ccfgptr->clkctr & TX4938_CLKCTR_PCIC1RST)
                 tx4938_ccfgptr->clkctr &= ~TX4938_CLKCTR_PCIC1RST;
@@ -855,7 +853,7 @@ void __init plat_time_init(void)
                                      txx9_gbus_clock / 2);
 }
 
-void __init toshiba_rbtx4938_setup(void)
+void __init plat_mem_setup(void)
 {
         unsigned long long pcfg;
         char *argptr;
@@ -1125,12 +1123,35 @@ static int __init rbtx4938_spi_init(void)
 }
 arch_initcall(rbtx4938_spi_init);
 
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+        struct resource res = {
+                .start  = base,
+                .end    = base + 0x100 - 1,
+                .flags  = IORESOURCE_MEM,
+                .parent = &tx4938_reg_resource,
+        };
+        struct platform_device *dev =
+                platform_device_register_simple("txx9wdt", -1, &res, 1);
+        return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init rbtx4938_wdt_init(void)
+{
+        return txx9_wdt_init(TX4938_TMR_REG(2) & 0xfffffffffULL);
+}
+device_initcall(rbtx4938_wdt_init);
+
 /* Minimum CLK support */
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
         if (!strcmp(id, "spi-baseclk"))
                 return (struct clk *)(txx9_gbus_clock / 2 / 4);
+        if (!strcmp(id, "imbus_clk"))
+                return (struct clk *)(txx9_gbus_clock / 2);
         return ERR_PTR(-ENOENT);
 }
 EXPORT_SYMBOL(clk_get);
diff --git a/arch/mips/vr41xx/common/init.c b/arch/mips/vr41xx/common/init.c
index 8d760df686c4..76d4b5ed3fc0 100644
--- a/arch/mips/vr41xx/common/init.c
+++ b/arch/mips/vr41xx/common/init.c
@@ -40,6 +40,8 @@ void __init plat_time_init(void)
 {
         unsigned long tclock;
 
+        vr41xx_calculate_clock_frequency();
+
         tclock = vr41xx_get_tclock_frequency();
         if (current_cpu_data.processor_id == PRID_VR4131_REV2_0 ||
             current_cpu_data.processor_id == PRID_VR4131_REV2_1)
@@ -50,8 +52,6 @@ void __init plat_time_init(void)
 
 void __init plat_mem_setup(void)
 {
-        vr41xx_calculate_clock_frequency();
-
         iomem_resource_init();
 }
 
diff --git a/arch/mips/vr41xx/nec-cmbvr4133/setup.c b/arch/mips/vr41xx/nec-cmbvr4133/setup.c
index 58e47686b499..7723d2011b08 100644
--- a/arch/mips/vr41xx/nec-cmbvr4133/setup.c
+++ b/arch/mips/vr41xx/nec-cmbvr4133/setup.c
@@ -50,7 +50,7 @@ static struct mtd_partition cmbvr4133_mtd_parts[] = {
         }
 };
 
-#define number_partitions (sizeof(cmbvr4133_mtd_parts)/sizeof(struct mtd_partition))
+#define number_partitions ARRAY_SIZE(cmbvr4133_mtd_parts)
 #endif
 
 extern void i8259_init(void);
@@ -64,8 +64,6 @@ static void __init nec_cmbvr4133_setup(void)
 #endif
         set_io_port_base(KSEG1ADDR(0x16000000));
 
-        mips_machtype = MACH_NEC_CMBVR4133;
-
 #ifdef CONFIG_PCI
 #ifdef CONFIG_ROCKHOPPER
         ali_m5229_preinit();
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index 40d0ff9b81ab..50b4a3a25d0a 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -172,11 +172,11 @@ SECTIONS
         __init_begin = .;
         .init.text : { 
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
         .init.data : {
-                *(.init.data)
+                INIT_DATA
         }
         . = ALIGN(16);
         .init.setup : {
@@ -215,10 +215,10 @@ SECTIONS
          *  from .altinstructions and .eh_frame
          */
         .exit.text : {
-                *(.exit.text)
+                EXIT_TEXT
         }
         .exit.data : {
-                *(.exit.data)
+                EXIT_DATA
         }
 #ifdef CONFIG_BLK_DEV_INITRD
         . = ALIGN(PAGE_SIZE);
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 18e32719d0ed..4b1d98b8135e 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -65,7 +65,7 @@ obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib))))
 obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat))))
 
 quiet_cmd_copy_zlib = COPY    $@
-      cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]*\).*@\"\1\"@" $< > $@
+      cmd_copy_zlib = sed "s@__used@@;s@<linux/\([^>]*\).*@\"\1\"@" $< > $@
 
 quiet_cmd_copy_zlibheader = COPY    $@
       cmd_copy_zlibheader = sed "s@<linux/\([^>]*\).*@\"\1\"@" $< > $@
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 25d9a96484dd..c8127f832df0 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -158,7 +158,7 @@ static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
         unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
         return sprintf(buf, "%lx\n", val); \
 } \
-static ssize_t __attribute_used__ \
+static ssize_t __used \
         store_##NAME(struct sys_device *dev, const char *buf, size_t count) \
 { \
         struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index f66fa5d966b0..0afb9e31d2a0 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -23,7 +23,7 @@ SECTIONS
         /* Sections to be discarded. */
         /DISCARD/ : {
         *(.exitcall.exit)
-        *(.exit.data)
+        EXIT_DATA
         }
 
         . = KERNELBASE;
@@ -76,17 +76,19 @@ SECTIONS
 
         .init.text : {
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
 
         /* .exit.text is discarded at runtime, not link time,
          * to deal with references from __bug_table
          */
-        .exit.text : { *(.exit.text) }
+        .exit.text : {
+                EXIT_TEXT
+        }
 
         .init.data : {
-                *(.init.data);
+                INIT_DATA
                 __vtop_table_begin = .;
                 *(.vtop_fixup);
                 __vtop_table_end = .;
diff --git a/arch/powerpc/oprofile/op_model_power4.c b/arch/powerpc/oprofile/op_model_power4.c
index cddc250a6a5c..446a8bbb847b 100644
--- a/arch/powerpc/oprofile/op_model_power4.c
+++ b/arch/powerpc/oprofile/op_model_power4.c
@@ -172,15 +172,15 @@ static void power4_stop(void)
 }
 
 /* Fake functions used by canonicalize_pc */
-static void __attribute_used__ hypervisor_bucket(void)
+static void __used hypervisor_bucket(void)
 {
 }
 
-static void __attribute_used__ rtas_bucket(void)
+static void __used rtas_bucket(void)
 {
 }
 
-static void __attribute_used__ kernel_unknown_bucket(void)
+static void __used kernel_unknown_bucket(void)
 {
 }
 
diff --git a/arch/ppc/kernel/vmlinux.lds.S b/arch/ppc/kernel/vmlinux.lds.S
index 98c1212674f6..52b64fcbdfc5 100644
--- a/arch/ppc/kernel/vmlinux.lds.S
+++ b/arch/ppc/kernel/vmlinux.lds.S
@@ -97,14 +97,14 @@ SECTIONS
   __init_begin = .;
   .init.text : {
         _sinittext = .;
-        *(.init.text)
+        INIT_TEXT
         _einittext = .;
   }
   /* .exit.text is discarded at runtime, not link time,
      to deal with references from __bug_table */
-  .exit.text : { *(.exit.text) }
+  .exit.text : { EXIT_TEXT }
   .init.data : {
-    *(.init.data);
+    INIT_DATA
     __vtop_table_begin = .;
     *(.vtop_fixup);
     __vtop_table_end = .;
@@ -164,6 +164,6 @@ SECTIONS
   /* Sections to be discarded. */
   /DISCARD/ : {
     *(.exitcall.exit)
-    *(.exit.data)
+    EXIT_DATA
   }
 }
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 936159199346..7d43c3cd3ef3 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -97,7 +97,7 @@ SECTIONS
         __init_begin = .;
         .init.text : {
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
         /*
@@ -105,11 +105,11 @@ SECTIONS
          * to deal with references from __bug_table
         */
         .exit.text : {
-                *(.exit.text)
+                EXIT_TEXT
         }
 
         .init.data : {
-                *(.init.data)
+                INIT_DATA
         }
         . = ALIGN(0x100);
         .init.setup : {
@@ -156,7 +156,7 @@ SECTIONS
 
         /* Sections to be discarded */
         /DISCARD/ : {
-                *(.exit.data)
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/sh/kernel/vmlinux_32.lds.S b/arch/sh/kernel/vmlinux_32.lds.S
index d549fac6d3e7..c7113786ecd4 100644
--- a/arch/sh/kernel/vmlinux_32.lds.S
+++ b/arch/sh/kernel/vmlinux_32.lds.S
@@ -84,9 +84,9 @@ SECTIONS
         . = ALIGN(PAGE_SIZE);           /* Init code and data */
         __init_begin = .;
         _sinittext = .;
-        .init.text : { *(.init.text) }
+        .init.text : { INIT_TEXT }
         _einittext = .;
-        .init.data : { *(.init.data) }
+        .init.data : { INIT_DATA }
 
         . = ALIGN(16);
         __setup_start = .;
@@ -122,8 +122,8 @@ SECTIONS
          * .exit.text is discarded at runtime, not link time, to deal with
          * references from __bug_table
          */
-        .exit.text : { *(.exit.text) }
-        .exit.data : { *(.exit.data) }
+        .exit.text : { EXIT_TEXT }
+        .exit.data : { EXIT_DATA }
 
         . = ALIGN(PAGE_SIZE);
         .bss : {
diff --git a/arch/sh/kernel/vmlinux_64.lds.S b/arch/sh/kernel/vmlinux_64.lds.S
index 2fd0f7401484..3f1bd6392bb3 100644
--- a/arch/sh/kernel/vmlinux_64.lds.S
+++ b/arch/sh/kernel/vmlinux_64.lds.S
@@ -96,9 +96,9 @@ SECTIONS
         . = ALIGN(PAGE_SIZE);           /* Init code and data */
         __init_begin = .;
         _sinittext = .;
-        .init.text : C_PHYS(.init.text) { *(.init.text) }
+        .init.text : C_PHYS(.init.text) { INIT_TEXT }
         _einittext = .;
-        .init.data : C_PHYS(.init.data) { *(.init.data) }
+        .init.data : C_PHYS(.init.data) { INIT_DATA }
         . = ALIGN(L1_CACHE_BYTES);      /* Better if Cache Line aligned */
         __setup_start = .;
         .init.setup : C_PHYS(.init.setup) { *(.init.setup) }
@@ -134,8 +134,8 @@ SECTIONS
          * .exit.text is discarded at runtime, not link time, to deal with
          * references from __bug_table
          */
-        .exit.text : C_PHYS(.exit.text) { *(.exit.text) }
-        .exit.data : C_PHYS(.exit.data) { *(.exit.data) }
+        .exit.text : C_PHYS(.exit.text) { EXIT_TEXT }
+        .exit.data : C_PHYS(.exit.data) { EXIT_DATA }
 
         . = ALIGN(PAGE_SIZE);
         .bss : C_PHYS(.bss) {
diff --git a/arch/sparc/kernel/vmlinux.lds.S b/arch/sparc/kernel/vmlinux.lds.S
index a8b4200f9cc3..216147d6e61f 100644
--- a/arch/sparc/kernel/vmlinux.lds.S
+++ b/arch/sparc/kernel/vmlinux.lds.S
@@ -48,12 +48,12 @@ SECTIONS
         __init_begin = .;
         .init.text : {
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
         __init_text_end = .;
         .init.data : {
-                *(.init.data)
+                INIT_DATA
         }
         . = ALIGN(16);
         .init.setup : {
@@ -102,8 +102,8 @@ SECTIONS
         _end = . ;
         PROVIDE (end = .);
         /DISCARD/ : {
-                *(.exit.text)
-                *(.exit.data)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c
index 953be816fa25..dc7bf1b6321c 100644
--- a/arch/sparc64/kernel/unaligned.c
+++ b/arch/sparc64/kernel/unaligned.c
@@ -175,7 +175,7 @@ unsigned long compute_effective_address(struct pt_regs *regs,
 }
 
 /* This is just to make gcc think die_if_kernel does return... */
-static void __attribute_used__ unaligned_panic(char *str, struct pt_regs *regs)
+static void __used unaligned_panic(char *str, struct pt_regs *regs)
 {
         die_if_kernel(str, regs);
 }
diff --git a/arch/sparc64/kernel/vmlinux.lds.S b/arch/sparc64/kernel/vmlinux.lds.S
index 9fcd503bc04a..01f809617e5e 100644
--- a/arch/sparc64/kernel/vmlinux.lds.S
+++ b/arch/sparc64/kernel/vmlinux.lds.S
@@ -56,11 +56,11 @@ SECTIONS
         .init.text : {
                 __init_begin = .;
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
         .init.data : {
-                *(.init.data)
+                INIT_DATA
         }
         . = ALIGN(16);
         .init.setup : {
@@ -137,8 +137,8 @@ SECTIONS
         PROVIDE (end = .);
 
         /DISCARD/ : {
-                *(.exit.text)
-                *(.exit.data)
+                EXIT_TEXT
+                EXIT_DATA
                 *(.exitcall.exit)
         }
 
diff --git a/arch/um/include/init.h b/arch/um/include/init.h
index d4de7c0120ce..cebc6cae9190 100644
--- a/arch/um/include/init.h
+++ b/arch/um/include/init.h
@@ -42,15 +42,15 @@ typedef void (*exitcall_t)(void);
 
 /* These are for everybody (although not all archs will actually
    discard it in modules) */
-#define __init          __attribute__ ((__section__ (".init.text")))
-#define __initdata      __attribute__ ((__section__ (".init.data")))
-#define __exitdata      __attribute__ ((__section__(".exit.data")))
-#define __exit_call     __attribute_used__ __attribute__ ((__section__ (".exitcall.exit")))
+#define __init          __section(.init.text)
+#define __initdata      __section(.init.data)
+#define __exitdata      __section(.exit.data)
+#define __exit_call     __used __section(.exitcall.exit)
 
 #ifdef MODULE
-#define __exit          __attribute__ ((__section__(".exit.text")))
+#define __exit          __section(.exit.text)
 #else
-#define __exit          __attribute_used__ __attribute__ ((__section__(".exit.text")))
+#define __exit          __used __section(.exit.text)
 #endif
 
 #endif
@@ -103,16 +103,16 @@ extern struct uml_param __uml_setup_start, __uml_setup_end;
  * Mark functions and data as being only used at initialization
  * or exit time.
  */
-#define __uml_init_setup        __attribute_used__ __attribute__ ((__section__ (".uml.setup.init")))
-#define __uml_setup_help        __attribute_used__ __attribute__ ((__section__ (".uml.help.init")))
-#define __uml_init_call         __attribute_used__ __attribute__ ((__section__ (".uml.initcall.init")))
-#define __uml_postsetup_call    __attribute_used__ __attribute__ ((__section__ (".uml.postsetup.init")))
-#define __uml_exit_call         __attribute_used__ __attribute__ ((__section__ (".uml.exitcall.exit")))
+#define __uml_init_setup        __used __section(.uml.setup.init)
+#define __uml_setup_help        __used __section(.uml.help.init)
+#define __uml_init_call         __used __section(.uml.initcall.init)
+#define __uml_postsetup_call    __used __section(.uml.postsetup.init)
+#define __uml_exit_call         __used __section(.uml.exitcall.exit)
 
 #ifndef __KERNEL__
 
 #define __define_initcall(level,fn) \
-        static initcall_t __initcall_##fn __attribute_used__ \
+        static initcall_t __initcall_##fn __used \
         __attribute__((__section__(".initcall" level ".init"))) = fn
 
 /* Userspace initcalls shouldn't depend on anything in the kernel, so we'll
@@ -122,7 +122,7 @@ extern struct uml_param __uml_setup_start, __uml_setup_end;
 
 #define __exitcall(fn) static exitcall_t __exitcall_##fn __exit_call = fn
 
-#define __init_call     __attribute_used__ __attribute__ ((__section__ (".initcall.init")))
+#define __init_call     __used __section(.initcall.init)
 
 #endif
 
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 3866f4960f04..26090b7f323e 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -17,7 +17,7 @@ SECTIONS
   __init_begin = .;
   .init.text : {
         _sinittext = .;
-        *(.init.text)
+        INIT_TEXT
         _einittext = .;
   }
 
@@ -84,7 +84,7 @@ SECTIONS
 
   #include "asm/common.lds.S"
 
-  init.data : { *(.init.data) }
+  init.data : { INIT_DATA }
 
   /* Ensure the __preinit_array_start label is properly aligned.  We
      could instead move the label definition inside the section, but
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index 13df191e2b41..5828c1d54505 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -23,7 +23,7 @@ SECTIONS
   __init_begin = .;
   .init.text : {
         _sinittext = .;
-        *(.init.text)
+        INIT_TEXT
         _einittext = .;
   }
   . = ALIGN(4096);
@@ -48,7 +48,7 @@ SECTIONS
 
   #include "asm/common.lds.S"
 
-  init.data : { *(init.data) }
+  init.data : { INIT_DATA }
   .data    :
   {
     . = ALIGN(KERNEL_STACK_SIZE);               /* init_task */
diff --git a/arch/v850/kernel/vmlinux.lds.S b/arch/v850/kernel/vmlinux.lds.S
index 6172599b4ce2..d08cd1d27f27 100644
--- a/arch/v850/kernel/vmlinux.lds.S
+++ b/arch/v850/kernel/vmlinux.lds.S
@@ -114,7 +114,7 @@
 #define DATA_CONTENTS                                                         \
                 __sdata = . ;                                                 \
                 DATA_DATA                                                     \
-                        *(.exit.data)   /* 2.5 convention */                  \
+                        EXIT_DATA       /* 2.5 convention */                  \
                         *(.data.exit)   /* 2.4 convention */                  \
                 . = ALIGN (16) ;                                              \
                 *(.data.cacheline_aligned)                                    \
@@ -157,9 +157,9 @@
                 . = ALIGN (4096) ;                                            \
                 __init_start = . ;                                            \
                         __sinittext = .;                                      \
-                        *(.init.text)   /* 2.5 convention */                  \
+                        INIT_TEXT       /* 2.5 convention */                  \
                         __einittext = .;                                      \
-                        *(.init.data)                                         \
+                        INIT_DATA                                             \
                         *(.text.init)   /* 2.4 convention */                  \
                         *(.data.init)                                         \
                 INITCALL_CONTENTS                                             \
@@ -170,7 +170,7 @@
 #define ROMK_INIT_RAM_CONTENTS                                                \
                 . = ALIGN (4096) ;                                            \
                 __init_start = . ;                                            \
-                        *(.init.data)   /* 2.5 convention */                  \
+                        INIT_DATA       /* 2.5 convention */                  \
                         *(.data.init)   /* 2.4 convention */                  \
                 __init_end = . ;                                              \
                 . = ALIGN (4096) ;
@@ -179,7 +179,7 @@
    should go into ROM.  */      
 #define ROMK_INIT_ROM_CONTENTS                                                \
                         _sinittext = .;                                       \
-                        *(.init.text)   /* 2.5 convention */                  \
+                        INIT_TEXT       /* 2.5 convention */                  \
                         _einittext = .;                                       \
                         *(.text.init)   /* 2.4 convention */                  \
                 INITCALL_CONTENTS                                             \
diff --git a/arch/x86/kernel/vmlinux_32.lds.S b/arch/x86/kernel/vmlinux_32.lds.S
index 7d72cce00529..84c913f38f98 100644
--- a/arch/x86/kernel/vmlinux_32.lds.S
+++ b/arch/x86/kernel/vmlinux_32.lds.S
@@ -131,10 +131,12 @@ SECTIONS
   .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
         __init_begin = .;
         _sinittext = .;
-        *(.init.text)
+        INIT_TEXT
         _einittext = .;
   }
-  .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
+  .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
+        INIT_DATA
+  }
   . = ALIGN(16);
   .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
         __setup_start = .;
@@ -169,8 +171,12 @@ SECTIONS
   }
   /* .exit.text is discard at runtime, not link time, to deal with references
      from .altinstructions and .eh_frame */
-  .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
-  .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
+  .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
+        EXIT_TEXT
+  }
+  .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
+        EXIT_DATA
+  }
 #if defined(CONFIG_BLK_DEV_INITRD)
   . = ALIGN(4096);
   .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S
index ba8ea97abd21..ea5386944e67 100644
--- a/arch/x86/kernel/vmlinux_64.lds.S
+++ b/arch/x86/kernel/vmlinux_64.lds.S
@@ -155,12 +155,15 @@ SECTIONS
   __init_begin = .;
   .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
         _sinittext = .;
-        *(.init.text)
+        INIT_TEXT
         _einittext = .;
   }
-  __initdata_begin = .;
-  .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
-  __initdata_end = .;
+  .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
+        __initdata_begin = .;
+        INIT_DATA
+        __initdata_end = .;
+   }
+
   . = ALIGN(16);
   __setup_start = .;
   .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
@@ -187,8 +190,12 @@ SECTIONS
   }
   /* .exit.text is discard at runtime, not link time, to deal with references
      from .altinstructions and .eh_frame */
-  .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
-  .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
+  .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
+        EXIT_TEXT
+  }
+  .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
+        EXIT_DATA
+  }
 
 /* vdso blob that is mapped into user space */
   vdso_start = . ;
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index ac4ed52034db..7d0f55a4982d 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -136,13 +136,13 @@ SECTIONS
   __init_begin = .;
   .init.text : {
         _sinittext = .;
-        *(.init.literal) *(.init.text)
+        *(.init.literal) INIT_TEXT
         _einittext = .;
   }
 
   .init.data :
   {
-    *(.init.data)
+    INIT_DATA
     . = ALIGN(0x4);
     __tagtable_begin = .;
     *(.taglist)
@@ -278,8 +278,9 @@ SECTIONS
   /* Sections to be discarded */
   /DISCARD/ :
   {
-        *(.exit.literal .exit.text)
-        *(.exit.data)
+        *(.exit.literal)
+        EXIT_TEXT
+        EXIT_DATA
         *(.exitcall.exit)
   }
 
diff --git a/arch/xtensa/mm/Makefile b/arch/xtensa/mm/Makefile
index 10aec22a8f98..64e304a2f884 100644
--- a/arch/xtensa/mm/Makefile
+++ b/arch/xtensa/mm/Makefile
@@ -1,9 +1,5 @@
 #
 # Makefile for the Linux/Xtensa-specific parts of the memory manager.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
 
 obj-y    := init.o fault.o tlb.o misc.o cache.o
diff --git a/arch/xtensa/platform-iss/Makefile b/arch/xtensa/platform-iss/Makefile
index 5b394e9620e5..af96e314d71f 100644
--- a/arch/xtensa/platform-iss/Makefile
+++ b/arch/xtensa/platform-iss/Makefile
@@ -3,11 +3,6 @@
 # Makefile for the Xtensa Instruction Set Simulator (ISS)
 # "prom monitor" library routines under Linux.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
-# Note 2! The CFLAGS definitions are in the main makefile...
 
 obj-y                   = io.o console.o setup.o network.o
 
diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile
index 06a86fe6a78d..de28dfd3b96c 100644
--- a/drivers/base/power/Makefile
+++ b/drivers/base/power/Makefile
@@ -2,9 +2,5 @@ obj-$(CONFIG_PM)	+= sysfs.o
 obj-$(CONFIG_PM_SLEEP)  += main.o
 obj-$(CONFIG_PM_TRACE)  += trace.o
 
-ifeq ($(CONFIG_DEBUG_DRIVER),y)
-EXTRA_CFLAGS += -DDEBUG
-endif
-ifeq ($(CONFIG_PM_VERBOSE),y)
-EXTRA_CFLAGS += -DDEBUG
-endif
+ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
+ccflags-$(CONFIG_PM_VERBOSE)   += -DDEBUG
diff --git a/drivers/infiniband/hw/cxgb3/Makefile b/drivers/infiniband/hw/cxgb3/Makefile
index 36b98989b15e..7e7b5a66f042 100644
--- a/drivers/infiniband/hw/cxgb3/Makefile
+++ b/drivers/infiniband/hw/cxgb3/Makefile
@@ -1,5 +1,4 @@
-EXTRA_CFLAGS += -I$(TOPDIR)/drivers/net/cxgb3 \
-                -I$(TOPDIR)/drivers/infiniband/hw/cxgb3/core
+EXTRA_CFLAGS += -Idrivers/net/cxgb3
 
 obj-$(CONFIG_INFINIBAND_CXGB3) += iw_cxgb3.o
 
diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h
index b242cee656e7..80e3f03b5041 100644
--- a/drivers/rapidio/rio.h
+++ b/drivers/rapidio/rio.h
@@ -31,8 +31,8 @@ extern struct rio_route_ops __end_rio_route_ops[];
 
 /* Helpers internal to the RIO core code */
 #define DECLARE_RIO_ROUTE_SECTION(section, vid, did, add_hook, get_hook)  \
-        static struct rio_route_ops __rio_route_ops __attribute_used__   \
-                __attribute__((__section__(#section))) = { vid, did, add_hook, get_hook };
+        static struct rio_route_ops __rio_route_ops __used   \
+        __section(section)= { vid, did, add_hook, get_hook };
 
 /**
  * DECLARE_RIO_ROUTE_OPS - Registers switch routing operations
diff --git a/fs/Kconfig b/fs/Kconfig
index 9656139d2e99..219ec06a8c7e 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -236,6 +236,7 @@ config JBD_DEBUG
 
 config JBD2
         tristate
+        select CRC32
         help
           This is a generic journaling layer for block devices that support
           both 32-bit and 64-bit block numbers.  It is currently used by
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 33fe39ad4e03..0cc3597c1197 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -546,11 +546,11 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
         dentry->d_op = &afs_fs_dentry_operations;
 
         d_add(dentry, inode);
-        _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%lu }",
+        _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%llu }",
                fid.vnode,
                fid.unique,
                dentry->d_inode->i_ino,
-               dentry->d_inode->i_version);
+               (unsigned long long)dentry->d_inode->i_version);
 
         return NULL;
 }
@@ -630,9 +630,10 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
                  * been deleted and replaced, and the original vnode ID has
                  * been reused */
                 if (fid.unique != vnode->fid.unique) {
-                        _debug("%s: file deleted (uq %u -> %u I:%lu)",
+                        _debug("%s: file deleted (uq %u -> %u I:%llu)",
                                dentry->d_name.name, fid.unique,
-                               vnode->fid.unique, dentry->d_inode->i_version);
+                               vnode->fid.unique,
+                               (unsigned long long)dentry->d_inode->i_version);
                         spin_lock(&vnode->lock);
                         set_bit(AFS_VNODE_DELETED, &vnode->flags);
                         spin_unlock(&vnode->lock);
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index d196840127c6..84750c8e9f95 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -301,7 +301,8 @@ int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 
         inode = dentry->d_inode;
 
-        _enter("{ ino=%lu v=%lu }", inode->i_ino, inode->i_version);
+        _enter("{ ino=%lu v=%llu }", inode->i_ino,
+                (unsigned long long)inode->i_version);
 
         generic_fillattr(inode, stat);
         return 0;
diff --git a/fs/buffer.c b/fs/buffer.c
index 7249e014819e..456c9ab7705b 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3213,6 +3213,50 @@ static int buffer_cpu_notify(struct notifier_block *self,
         return NOTIFY_OK;
 }
 
+/**
+ * bh_uptodate_or_lock: Test whether the buffer is uptodate
+ * @bh: struct buffer_head
+ *
+ * Return true if the buffer is up-to-date and false,
+ * with the buffer locked, if not.
+ */
+int bh_uptodate_or_lock(struct buffer_head *bh)
+{
+        if (!buffer_uptodate(bh)) {
+                lock_buffer(bh);
+                if (!buffer_uptodate(bh))
+                        return 0;
+                unlock_buffer(bh);
+        }
+        return 1;
+}
+EXPORT_SYMBOL(bh_uptodate_or_lock);
+
+/**
+ * bh_submit_read: Submit a locked buffer for reading
+ * @bh: struct buffer_head
+ *
+ * Returns zero on success and -EIO on error.
+ */
+int bh_submit_read(struct buffer_head *bh)
+{
+        BUG_ON(!buffer_locked(bh));
+
+        if (buffer_uptodate(bh)) {
+                unlock_buffer(bh);
+                return 0;
+        }
+
+        get_bh(bh);
+        bh->b_end_io = end_buffer_read_sync;
+        submit_bh(READ, bh);
+        wait_on_buffer(bh);
+        if (buffer_uptodate(bh))
+                return 0;
+        return -EIO;
+}
+EXPORT_SYMBOL(bh_submit_read);
+
 void __init buffer_init(void)
 {
         int nrpages;
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index da8cb3b3592c..ffdc022cae64 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1376,7 +1376,7 @@ static int do_atm_ioctl(unsigned int fd, unsigned int cmd32, unsigned long arg)
         return -EINVAL;
 }
 
-static __attribute_used__ int 
+static __used int
 ret_einval(unsigned int fd, unsigned int cmd, unsigned long arg)
 {
         return -EINVAL;
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 154e25f13d77..6abaf75163f0 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -680,11 +680,31 @@ static int ext2_check_descriptors (struct super_block * sb)
 static loff_t ext2_max_size(int bits)
 {
         loff_t res = EXT2_NDIR_BLOCKS;
-        /* This constant is calculated to be the largest file size for a
-         * dense, 4k-blocksize file such that the total number of
+        int meta_blocks;
+        loff_t upper_limit;
+
+        /* This is calculated to be the largest file size for a
+         * dense, file such that the total number of
          * sectors in the file, including data and all indirect blocks,
-         * does not exceed 2^32. */
-        const loff_t upper_limit = 0x1ff7fffd000LL;
+         * does not exceed 2^32 -1
+         * __u32 i_blocks representing the total number of
+         * 512 bytes blocks of the file
+         */
+        upper_limit = (1LL << 32) - 1;
+
+        /* total blocks in file system block size */
+        upper_limit >>= (bits - 9);
+
+
+        /* indirect blocks */
+        meta_blocks = 1;
+        /* double indirect blocks */
+        meta_blocks += 1 + (1LL << (bits-2));
+        /* tripple indirect blocks */
+        meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
+
+        upper_limit -= meta_blocks;
+        upper_limit <<= bits;
 
         res += 1LL << (bits-2);
         res += 1LL << (2*(bits-2));
@@ -692,6 +712,10 @@ static loff_t ext2_max_size(int bits)
         res <<= bits;
         if (res > upper_limit)
                 res = upper_limit;
+
+        if (res > MAX_LFS_FILESIZE)
+                res = MAX_LFS_FILESIZE;
+
         return res;
 }
 
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index cb14de1502c3..f3675cc630e9 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1436,11 +1436,31 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 static loff_t ext3_max_size(int bits)
 {
         loff_t res = EXT3_NDIR_BLOCKS;
-        /* This constant is calculated to be the largest file size for a
-         * dense, 4k-blocksize file such that the total number of
+        int meta_blocks;
+        loff_t upper_limit;
+
+        /* This is calculated to be the largest file size for a
+         * dense, file such that the total number of
          * sectors in the file, including data and all indirect blocks,
-         * does not exceed 2^32. */
-        const loff_t upper_limit = 0x1ff7fffd000LL;
+         * does not exceed 2^32 -1
+         * __u32 i_blocks representing the total number of
+         * 512 bytes blocks of the file
+         */
+        upper_limit = (1LL << 32) - 1;
+
+        /* total blocks in file system block size */
+        upper_limit >>= (bits - 9);
+
+
+        /* indirect blocks */
+        meta_blocks = 1;
+        /* double indirect blocks */
+        meta_blocks += 1 + (1LL << (bits-2));
+        /* tripple indirect blocks */
+        meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
+
+        upper_limit -= meta_blocks;
+        upper_limit <<= bits;
 
         res += 1LL << (bits-2);
         res += 1LL << (2*(bits-2));
@@ -1448,6 +1468,10 @@ static loff_t ext3_max_size(int bits)
         res <<= bits;
         if (res > upper_limit)
                 res = upper_limit;
+
+        if (res > MAX_LFS_FILESIZE)
+                res = MAX_LFS_FILESIZE;
+
         return res;
 }
 
diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile
index ae6e7e502ac9..ac6fa8ca0a2f 100644
--- a/fs/ext4/Makefile
+++ b/fs/ext4/Makefile
@@ -6,7 +6,7 @@ obj-$(CONFIG_EXT4DEV_FS) += ext4dev.o
 
 ext4dev-y       := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
                    ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \
-                   ext4_jbd2.o
+                   ext4_jbd2.o migrate.o mballoc.o
 
 ext4dev-$(CONFIG_EXT4DEV_FS_XATTR)      += xattr.o xattr_user.o xattr_trusted.o
 ext4dev-$(CONFIG_EXT4DEV_FS_POSIX_ACL)  += acl.o
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 71ee95e534fd..ac75ea953d83 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -29,7 +29,7 @@
  * Calculate the block group number and offset, given a block number
  */
 void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
-                unsigned long *blockgrpp, ext4_grpblk_t *offsetp)
+                ext4_group_t *blockgrpp, ext4_grpblk_t *offsetp)
 {
         struct ext4_super_block *es = EXT4_SB(sb)->s_es;
         ext4_grpblk_t offset;
@@ -46,7 +46,7 @@ void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
 /* Initializes an uninitialized block bitmap if given, and returns the
  * number of blocks free in the group. */
 unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh,
-                                int block_group, struct ext4_group_desc *gdp)
+                 ext4_group_t block_group, struct ext4_group_desc *gdp)
 {
         unsigned long start;
         int bit, bit_max;
@@ -60,7 +60,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh,
                  * essentially implementing a per-group read-only flag. */
                 if (!ext4_group_desc_csum_verify(sbi, block_group, gdp)) {
                         ext4_error(sb, __FUNCTION__,
-                                   "Checksum bad for group %u\n", block_group);
+                                  "Checksum bad for group %lu\n", block_group);
                         gdp->bg_free_blocks_count = 0;
                         gdp->bg_free_inodes_count = 0;
                         gdp->bg_itable_unused = 0;
@@ -153,7 +153,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh,
  *                      group descriptor
  */
 struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
-                                             unsigned int block_group,
+                                             ext4_group_t block_group,
                                              struct buffer_head ** bh)
 {
         unsigned long group_desc;
@@ -164,7 +164,7 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
         if (block_group >= sbi->s_groups_count) {
                 ext4_error (sb, "ext4_get_group_desc",
                             "block_group >= groups_count - "
-                            "block_group = %d, groups_count = %lu",
+                            "block_group = %lu, groups_count = %lu",
                             block_group, sbi->s_groups_count);
 
                 return NULL;
@@ -176,7 +176,7 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
         if (!sbi->s_group_desc[group_desc]) {
                 ext4_error (sb, "ext4_get_group_desc",
                             "Group descriptor not loaded - "
-                            "block_group = %d, group_desc = %lu, desc = %lu",
+                            "block_group = %lu, group_desc = %lu, desc = %lu",
                              block_group, group_desc, offset);
                 return NULL;
         }
@@ -189,18 +189,70 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
         return desc;
 }
 
+static int ext4_valid_block_bitmap(struct super_block *sb,
+                                        struct ext4_group_desc *desc,
+                                        unsigned int block_group,
+                                        struct buffer_head *bh)
+{
+        ext4_grpblk_t offset;
+        ext4_grpblk_t next_zero_bit;
+        ext4_fsblk_t bitmap_blk;
+        ext4_fsblk_t group_first_block;
+
+        if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
+                /* with FLEX_BG, the inode/block bitmaps and itable
+                 * blocks may not be in the group at all
+                 * so the bitmap validation will be skipped for those groups
+                 * or it has to also read the block group where the bitmaps
+                 * are located to verify they are set.
+                 */
+                return 1;
+        }
+        group_first_block = ext4_group_first_block_no(sb, block_group);
+
+        /* check whether block bitmap block number is set */
+        bitmap_blk = ext4_block_bitmap(sb, desc);
+        offset = bitmap_blk - group_first_block;
+        if (!ext4_test_bit(offset, bh->b_data))
+                /* bad block bitmap */
+                goto err_out;
+
+        /* check whether the inode bitmap block number is set */
+        bitmap_blk = ext4_inode_bitmap(sb, desc);
+        offset = bitmap_blk - group_first_block;
+        if (!ext4_test_bit(offset, bh->b_data))
+                /* bad block bitmap */
+                goto err_out;
+
+        /* check whether the inode table block number is set */
+        bitmap_blk = ext4_inode_table(sb, desc);
+        offset = bitmap_blk - group_first_block;
+        next_zero_bit = ext4_find_next_zero_bit(bh->b_data,
+                                offset + EXT4_SB(sb)->s_itb_per_group,
+                                offset);
+        if (next_zero_bit >= offset + EXT4_SB(sb)->s_itb_per_group)
+                /* good bitmap for inode tables */
+                return 1;
+
+err_out:
+        ext4_error(sb, __FUNCTION__,
+                        "Invalid block bitmap - "
+                        "block_group = %d, block = %llu",
+                        block_group, bitmap_blk);
+        return 0;
+}
 /**
  * read_block_bitmap()
  * @sb:                 super block
  * @block_group:        given block group
  *
- * Read the bitmap for a given block_group, reading into the specified
- * slot in the superblock's bitmap cache.
+ * Read the bitmap for a given block_group,and validate the
+ * bits for block/inode/inode tables are set in the bitmaps
  *
  * Return buffer_head on success or NULL in case of failure.
  */
 struct buffer_head *
-read_block_bitmap(struct super_block *sb, unsigned int block_group)
+read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
 {
         struct ext4_group_desc * desc;
         struct buffer_head * bh = NULL;
@@ -210,25 +262,36 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
         if (!desc)
                 return NULL;
         bitmap_blk = ext4_block_bitmap(sb, desc);
+        bh = sb_getblk(sb, bitmap_blk);
+        if (unlikely(!bh)) {
+                ext4_error(sb, __FUNCTION__,
+                            "Cannot read block bitmap - "
+                            "block_group = %d, block_bitmap = %llu",
+                            (int)block_group, (unsigned long long)bitmap_blk);
+                return NULL;
+        }
+        if (bh_uptodate_or_lock(bh))
+                return bh;
+
         if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
-                bh = sb_getblk(sb, bitmap_blk);
-                if (!buffer_uptodate(bh)) {
-                        lock_buffer(bh);
-                        if (!buffer_uptodate(bh)) {
-                                ext4_init_block_bitmap(sb, bh, block_group,
-                                                       desc);
-                                set_buffer_uptodate(bh);
-                        }
-                        unlock_buffer(bh);
-                }
-        } else {
-                bh = sb_bread(sb, bitmap_blk);
+                ext4_init_block_bitmap(sb, bh, block_group, desc);
+                set_buffer_uptodate(bh);
+                unlock_buffer(bh);
+                return bh;
         }
-        if (!bh)
-                ext4_error (sb, __FUNCTION__,
+        if (bh_submit_read(bh) < 0) {
+                put_bh(bh);
+                ext4_error(sb, __FUNCTION__,
                             "Cannot read block bitmap - "
                             "block_group = %d, block_bitmap = %llu",
-                            block_group, bitmap_blk);
+                            (int)block_group, (unsigned long long)bitmap_blk);
+                return NULL;
+        }
+        if (!ext4_valid_block_bitmap(sb, desc, block_group, bh)) {
+                put_bh(bh);
+                return NULL;
+        }
+
         return bh;
 }
 /*
@@ -320,7 +383,7 @@ restart:
  */
 static int
 goal_in_my_reservation(struct ext4_reserve_window *rsv, ext4_grpblk_t grp_goal,
-                        unsigned int group, struct super_block * sb)
+                        ext4_group_t group, struct super_block *sb)
 {
         ext4_fsblk_t group_first_block, group_last_block;
 
@@ -463,7 +526,7 @@ static inline int rsv_is_empty(struct ext4_reserve_window *rsv)
  * when setting the reservation window size through ioctl before the file
  * is open for write (needs block allocation).
  *
- * Needs truncate_mutex protection prior to call this function.
+ * Needs down_write(i_data_sem) protection prior to call this function.
  */
 void ext4_init_block_alloc_info(struct inode *inode)
 {
@@ -514,6 +577,8 @@ void ext4_discard_reservation(struct inode *inode)
         struct ext4_reserve_window_node *rsv;
         spinlock_t *rsv_lock = &EXT4_SB(inode->i_sb)->s_rsv_window_lock;
 
+        ext4_mb_discard_inode_preallocations(inode);
+
         if (!block_i)
                 return;
 
@@ -540,7 +605,7 @@ void ext4_free_blocks_sb(handle_t *handle, struct super_block *sb,
 {
         struct buffer_head *bitmap_bh = NULL;
         struct buffer_head *gd_bh;
-        unsigned long block_group;
+        ext4_group_t block_group;
         ext4_grpblk_t bit;
         unsigned long i;
         unsigned long overflow;
@@ -587,11 +652,13 @@ do_more:
             in_range(ext4_inode_bitmap(sb, desc), block, count) ||
             in_range(block, ext4_inode_table(sb, desc), sbi->s_itb_per_group) ||
             in_range(block + count - 1, ext4_inode_table(sb, desc),
-                     sbi->s_itb_per_group))
+                     sbi->s_itb_per_group)) {
                 ext4_error (sb, "ext4_free_blocks",
                             "Freeing blocks in system zones - "
                             "Block = %llu, count = %lu",
                             block, count);
+                goto error_return;
+        }
 
         /*
          * We are about to start releasing blocks in the bitmap,
@@ -720,19 +787,29 @@ error_return:
  * @inode:              inode
  * @block:              start physical block to free
  * @count:              number of blocks to count
+ * @metadata:           Are these metadata blocks
  */
 void ext4_free_blocks(handle_t *handle, struct inode *inode,
-                        ext4_fsblk_t block, unsigned long count)
+                        ext4_fsblk_t block, unsigned long count,
+                        int metadata)
 {
         struct super_block * sb;
         unsigned long dquot_freed_blocks;
 
+        /* this isn't the right place to decide whether block is metadata
+         * inode.c/extents.c knows better, but for safety ... */
+        if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode) ||
+                        ext4_should_journal_data(inode))
+                metadata = 1;
+
         sb = inode->i_sb;
-        if (!sb) {
-                printk ("ext4_free_blocks: nonexistent device");
-                return;
-        }
-        ext4_free_blocks_sb(handle, sb, block, count, &dquot_freed_blocks);
+
+        if (!test_opt(sb, MBALLOC) || !EXT4_SB(sb)->s_group_info)
+                ext4_free_blocks_sb(handle, sb, block, count,
+                                                &dquot_freed_blocks);
+        else
+                ext4_mb_free_blocks(handle, inode, block, count,
+                                                metadata, &dquot_freed_blocks);
         if (dquot_freed_blocks)
                 DQUOT_FREE_BLOCK(inode, dquot_freed_blocks);
         return;
@@ -920,9 +997,10 @@ claim_block(spinlock_t *lock, ext4_grpblk_t block, struct buffer_head *bh)
  * ext4_journal_release_buffer(), else we'll run out of credits.
  */
 static ext4_grpblk_t
-ext4_try_to_allocate(struct super_block *sb, handle_t *handle, int group,
-                        struct buffer_head *bitmap_bh, ext4_grpblk_t grp_goal,
-                        unsigned long *count, struct ext4_reserve_window *my_rsv)
+ext4_try_to_allocate(struct super_block *sb, handle_t *handle,
+                        ext4_group_t group, struct buffer_head *bitmap_bh,
+                        ext4_grpblk_t grp_goal, unsigned long *count,
+                        struct ext4_reserve_window *my_rsv)
 {
         ext4_fsblk_t group_first_block;
         ext4_grpblk_t start, end;
@@ -1156,7 +1234,7 @@ static int find_next_reservable_window(
  */
 static int alloc_new_reservation(struct ext4_reserve_window_node *my_rsv,
                 ext4_grpblk_t grp_goal, struct super_block *sb,
-                unsigned int group, struct buffer_head *bitmap_bh)
+                ext4_group_t group, struct buffer_head *bitmap_bh)
 {
         struct ext4_reserve_window_node *search_head;
         ext4_fsblk_t group_first_block, group_end_block, start_block;
@@ -1354,7 +1432,7 @@ static void try_to_extend_reservation(struct ext4_reserve_window_node *my_rsv,
  */
 static ext4_grpblk_t
 ext4_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle,
-                        unsigned int group, struct buffer_head *bitmap_bh,
+                        ext4_group_t group, struct buffer_head *bitmap_bh,
                         ext4_grpblk_t grp_goal,
                         struct ext4_reserve_window_node * my_rsv,
                         unsigned long *count, int *errp)
@@ -1510,7 +1588,7 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
 }
 
 /**
- * ext4_new_blocks() -- core block(s) allocation function
+ * ext4_new_blocks_old() -- core block(s) allocation function
  * @handle:             handle to this transaction
  * @inode:              file inode
  * @goal:               given target block(filesystem wide)
@@ -1523,17 +1601,17 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
  * any specific goal block.
  *
  */
-ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
+ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
                         ext4_fsblk_t goal, unsigned long *count, int *errp)
 {
         struct buffer_head *bitmap_bh = NULL;
         struct buffer_head *gdp_bh;
-        unsigned long group_no;
-        int goal_group;
+        ext4_group_t group_no;
+        ext4_group_t goal_group;
         ext4_grpblk_t grp_target_blk;   /* blockgroup relative goal block */
         ext4_grpblk_t grp_alloc_blk;    /* blockgroup-relative allocated block*/
         ext4_fsblk_t ret_block;         /* filesyetem-wide allocated block */
-        int bgi;                        /* blockgroup iteration index */
+        ext4_group_t bgi;                       /* blockgroup iteration index */
         int fatal = 0, err;
         int performed_allocation = 0;
         ext4_grpblk_t free_blocks;      /* number of free blocks in a group */
@@ -1544,10 +1622,7 @@ ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
         struct ext4_reserve_window_node *my_rsv = NULL;
         struct ext4_block_alloc_info *block_i;
         unsigned short windowsz = 0;
-#ifdef EXT4FS_DEBUG
-        static int goal_hits, goal_attempts;
-#endif
-        unsigned long ngroups;
+        ext4_group_t ngroups;
         unsigned long num = *count;
 
         *errp = -ENOSPC;
@@ -1567,7 +1642,7 @@ ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
 
         sbi = EXT4_SB(sb);
         es = EXT4_SB(sb)->s_es;
-        ext4_debug("goal=%lu.\n", goal);
+        ext4_debug("goal=%llu.\n", goal);
         /*
          * Allocate a block from reservation only when
          * filesystem is mounted with reservation(default,-o reservation), and
@@ -1677,7 +1752,7 @@ retry_alloc:
 
 allocated:
 
-        ext4_debug("using block group %d(%d)\n",
+        ext4_debug("using block group %lu(%d)\n",
                         group_no, gdp->bg_free_blocks_count);
 
         BUFFER_TRACE(gdp_bh, "get_write_access");
@@ -1692,11 +1767,13 @@ allocated:
             in_range(ret_block, ext4_inode_table(sb, gdp),
                      EXT4_SB(sb)->s_itb_per_group) ||
             in_range(ret_block + num - 1, ext4_inode_table(sb, gdp),
-                     EXT4_SB(sb)->s_itb_per_group))
+                     EXT4_SB(sb)->s_itb_per_group)) {
                 ext4_error(sb, "ext4_new_block",
                             "Allocating block in system zone - "
                             "blocks from %llu, length %lu",
                              ret_block, num);
+                goto out;
+        }
 
         performed_allocation = 1;
 
@@ -1743,9 +1820,6 @@ allocated:
          * list of some description.  We don't know in advance whether
          * the caller wants to use it as metadata or data.
          */
-        ext4_debug("allocating block %lu. Goal hits %d of %d.\n",
-                        ret_block, goal_hits, goal_attempts);
-
         spin_lock(sb_bgl_lock(sbi, group_no));
         if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))
                 gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
@@ -1787,13 +1861,46 @@ out:
 }
 
 ext4_fsblk_t ext4_new_block(handle_t *handle, struct inode *inode,
-                        ext4_fsblk_t goal, int *errp)
+                ext4_fsblk_t goal, int *errp)
 {
-        unsigned long count = 1;
+        struct ext4_allocation_request ar;
+        ext4_fsblk_t ret;
 
-        return ext4_new_blocks(handle, inode, goal, &count, errp);
+        if (!test_opt(inode->i_sb, MBALLOC)) {
+                unsigned long count = 1;
+                ret = ext4_new_blocks_old(handle, inode, goal, &count, errp);
+                return ret;
+        }
+
+        memset(&ar, 0, sizeof(ar));
+        ar.inode = inode;
+        ar.goal = goal;
+        ar.len = 1;
+        ret = ext4_mb_new_blocks(handle, &ar, errp);
+        return ret;
+}
+
+ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
+                ext4_fsblk_t goal, unsigned long *count, int *errp)
+{
+        struct ext4_allocation_request ar;
+        ext4_fsblk_t ret;
+
+        if (!test_opt(inode->i_sb, MBALLOC)) {
+                ret = ext4_new_blocks_old(handle, inode, goal, count, errp);
+                return ret;
+        }
+
+        memset(&ar, 0, sizeof(ar));
+        ar.inode = inode;
+        ar.goal = goal;
+        ar.len = *count;
+        ret = ext4_mb_new_blocks(handle, &ar, errp);
+        *count = ar.len;
+        return ret;
 }
 
+
 /**
  * ext4_count_free_blocks() -- count filesystem free blocks
  * @sb:         superblock
@@ -1804,8 +1911,8 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
 {
         ext4_fsblk_t desc_count;
         struct ext4_group_desc *gdp;
-        int i;
-        unsigned long ngroups = EXT4_SB(sb)->s_groups_count;
+        ext4_group_t i;
+        ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
 #ifdef EXT4FS_DEBUG
         struct ext4_super_block *es;
         ext4_fsblk_t bitmap_count;
@@ -1829,14 +1936,14 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
                         continue;
 
                 x = ext4_count_free(bitmap_bh, sb->s_blocksize);
-                printk("group %d: stored = %d, counted = %lu\n",
+                printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n",
                         i, le16_to_cpu(gdp->bg_free_blocks_count), x);
                 bitmap_count += x;
         }
         brelse(bitmap_bh);
         printk("ext4_count_free_blocks: stored = %llu"
                 ", computed = %llu, %llu\n",
-               EXT4_FREE_BLOCKS_COUNT(es),
+                ext4_free_blocks_count(es),
                 desc_count, bitmap_count);
         return bitmap_count;
 #else
@@ -1853,7 +1960,7 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
 #endif
 }
 
-static inline int test_root(int a, int b)
+static inline int test_root(ext4_group_t a, int b)
 {
         int num = b;
 
@@ -1862,7 +1969,7 @@ static inline int test_root(int a, int b)
         return num == a;
 }
 
-static int ext4_group_sparse(int group)
+static int ext4_group_sparse(ext4_group_t group)
 {
         if (group <= 1)
                 return 1;
@@ -1880,7 +1987,7 @@ static int ext4_group_sparse(int group)
  *      Return the number of blocks used by the superblock (primary or backup)
  *      in this group.  Currently this will be only 0 or 1.
  */
-int ext4_bg_has_super(struct super_block *sb, int group)
+int ext4_bg_has_super(struct super_block *sb, ext4_group_t group)
 {
         if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
                                 EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) &&
@@ -1889,18 +1996,20 @@ int ext4_bg_has_super(struct super_block *sb, int group)
         return 1;
 }
 
-static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb, int group)
+static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb,
+                                        ext4_group_t group)
 {
         unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb);
-        unsigned long first = metagroup * EXT4_DESC_PER_BLOCK(sb);
-        unsigned long last = first + EXT4_DESC_PER_BLOCK(sb) - 1;
+        ext4_group_t first = metagroup * EXT4_DESC_PER_BLOCK(sb);
+        ext4_group_t last = first + EXT4_DESC_PER_BLOCK(sb) - 1;
 
         if (group == first || group == first + 1 || group == last)
                 return 1;
         return 0;
 }
 
-static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb, int group)
+static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb,
+                                        ext4_group_t group)
 {
         if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
                                 EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) &&
@@ -1918,7 +2027,7 @@ static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb, int group)
  *      (primary or backup) in this group.  In the future there may be a
  *      different number of descriptor blocks in each group.
  */
-unsigned long ext4_bg_num_gdb(struct super_block *sb, int group)
+unsigned long ext4_bg_num_gdb(struct super_block *sb, ext4_group_t group)
 {
         unsigned long first_meta_bg =
                         le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index f612bef98315..33888bb58144 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -67,7 +67,7 @@ int ext4_check_dir_entry (const char * function, struct inode * dir,
                           unsigned long offset)
 {
         const char * error_msg = NULL;
-        const int rlen = le16_to_cpu(de->rec_len);
+        const int rlen = ext4_rec_len_from_disk(de->rec_len);
 
         if (rlen < EXT4_DIR_REC_LEN(1))
                 error_msg = "rec_len is smaller than minimal";
@@ -124,7 +124,7 @@ static int ext4_readdir(struct file * filp,
         offset = filp->f_pos & (sb->s_blocksize - 1);
 
         while (!error && !stored && filp->f_pos < inode->i_size) {
-                unsigned long blk = filp->f_pos >> EXT4_BLOCK_SIZE_BITS(sb);
+                ext4_lblk_t blk = filp->f_pos >> EXT4_BLOCK_SIZE_BITS(sb);
                 struct buffer_head map_bh;
                 struct buffer_head *bh = NULL;
 
@@ -172,10 +172,10 @@ revalidate:
                                  * least that it is non-zero.  A
                                  * failure will be detected in the
                                  * dirent test below. */
-                                if (le16_to_cpu(de->rec_len) <
-                                                EXT4_DIR_REC_LEN(1))
+                                if (ext4_rec_len_from_disk(de->rec_len)
+                                                < EXT4_DIR_REC_LEN(1))
                                         break;
-                                i += le16_to_cpu(de->rec_len);
+                                i += ext4_rec_len_from_disk(de->rec_len);
                         }
                         offset = i;
                         filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1))
@@ -197,7 +197,7 @@ revalidate:
                                 ret = stored;
                                 goto out;
                         }
-                        offset += le16_to_cpu(de->rec_len);
+                        offset += ext4_rec_len_from_disk(de->rec_len);
                         if (le32_to_cpu(de->inode)) {
                                 /* We might block in the next section
                                  * if the data destination is
@@ -219,7 +219,7 @@ revalidate:
                                         goto revalidate;
                                 stored ++;
                         }
-                        filp->f_pos += le16_to_cpu(de->rec_len);
+                        filp->f_pos += ext4_rec_len_from_disk(de->rec_len);
                 }
                 offset = 0;
                 brelse (bh);
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 85287742f2ae..bc7081f1fbe8 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -61,7 +61,7 @@ static ext4_fsblk_t ext_pblock(struct ext4_extent *ex)
  * idx_pblock:
  * combine low and high parts of a leaf physical block number into ext4_fsblk_t
  */
-static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
+ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
 {
         ext4_fsblk_t block;
 
@@ -75,7 +75,7 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
  * stores a large physical block number into an extent struct,
  * breaking it into parts
  */
-static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
+void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
 {
         ex->ee_start_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
         ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
@@ -144,7 +144,7 @@ static int ext4_ext_dirty(handle_t *handle, struct inode *inode,
 
 static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
                               struct ext4_ext_path *path,
-                              ext4_fsblk_t block)
+                              ext4_lblk_t block)
 {
         struct ext4_inode_info *ei = EXT4_I(inode);
         ext4_fsblk_t bg_start;
@@ -367,13 +367,14 @@ static void ext4_ext_drop_refs(struct ext4_ext_path *path)
  * the header must be checked before calling this
  */
 static void
-ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int block)
+ext4_ext_binsearch_idx(struct inode *inode,
+                        struct ext4_ext_path *path, ext4_lblk_t block)
 {
         struct ext4_extent_header *eh = path->p_hdr;
         struct ext4_extent_idx *r, *l, *m;
 
 
-        ext_debug("binsearch for %d(idx):  ", block);
+        ext_debug("binsearch for %u(idx):  ", block);
 
         l = EXT_FIRST_INDEX(eh) + 1;
         r = EXT_LAST_INDEX(eh);
@@ -425,7 +426,8 @@ ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int bloc
  * the header must be checked before calling this
  */
 static void
-ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
+ext4_ext_binsearch(struct inode *inode,
+                struct ext4_ext_path *path, ext4_lblk_t block)
 {
         struct ext4_extent_header *eh = path->p_hdr;
         struct ext4_extent *r, *l, *m;
@@ -438,7 +440,7 @@ ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
                 return;
         }
 
-        ext_debug("binsearch for %d:  ", block);
+        ext_debug("binsearch for %u:  ", block);
 
         l = EXT_FIRST_EXTENT(eh) + 1;
         r = EXT_LAST_EXTENT(eh);
@@ -494,7 +496,8 @@ int ext4_ext_tree_init(handle_t *handle, struct inode *inode)
 }
 
 struct ext4_ext_path *
-ext4_ext_find_extent(struct inode *inode, int block, struct ext4_ext_path *path)
+ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
+                                        struct ext4_ext_path *path)
 {
         struct ext4_extent_header *eh;
         struct buffer_head *bh;
@@ -763,7 +766,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
         while (k--) {
                 oldblock = newblock;
                 newblock = ablocks[--a];
-                bh = sb_getblk(inode->i_sb, (ext4_fsblk_t)newblock);
+                bh = sb_getblk(inode->i_sb, newblock);
                 if (!bh) {
                         err = -EIO;
                         goto cleanup;
@@ -783,9 +786,8 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
                 fidx->ei_block = border;
                 ext4_idx_store_pblock(fidx, oldblock);
 
-                ext_debug("int.index at %d (block %llu): %lu -> %llu\n", i,
-                                newblock, (unsigned long) le32_to_cpu(border),
-                                oldblock);
+                ext_debug("int.index at %d (block %llu): %u -> %llu\n",
+                                i, newblock, le32_to_cpu(border), oldblock);
                 /* copy indexes */
                 m = 0;
                 path[i].p_idx++;
@@ -851,7 +853,7 @@ cleanup:
                 for (i = 0; i < depth; i++) {
                         if (!ablocks[i])
                                 continue;
-                        ext4_free_blocks(handle, inode, ablocks[i], 1);
+                        ext4_free_blocks(handle, inode, ablocks[i], 1, 1);
                 }
         }
         kfree(ablocks);
@@ -979,8 +981,8 @@ repeat:
                 /* refill path */
                 ext4_ext_drop_refs(path);
                 path = ext4_ext_find_extent(inode,
-                                            le32_to_cpu(newext->ee_block),
-                                            path);
+                                    (ext4_lblk_t)le32_to_cpu(newext->ee_block),
+                                    path);
                 if (IS_ERR(path))
                         err = PTR_ERR(path);
         } else {
@@ -992,8 +994,8 @@ repeat:
                 /* refill path */
                 ext4_ext_drop_refs(path);
                 path = ext4_ext_find_extent(inode,
-                                            le32_to_cpu(newext->ee_block),
-                                            path);
+                                   (ext4_lblk_t)le32_to_cpu(newext->ee_block),
+                                    path);
                 if (IS_ERR(path)) {
                         err = PTR_ERR(path);
                         goto out;
@@ -1015,13 +1017,157 @@ out:
 }
 
 /*
+ * search the closest allocated block to the left for *logical
+ * and returns it at @logical + it's physical address at @phys
+ * if *logical is the smallest allocated block, the function
+ * returns 0 at @phys
+ * return value contains 0 (success) or error code
+ */
+int
+ext4_ext_search_left(struct inode *inode, struct ext4_ext_path *path,
+                        ext4_lblk_t *logical, ext4_fsblk_t *phys)
+{
+        struct ext4_extent_idx *ix;
+        struct ext4_extent *ex;
+        int depth, ee_len;
+
+        BUG_ON(path == NULL);
+        depth = path->p_depth;
+        *phys = 0;
+
+        if (depth == 0 && path->p_ext == NULL)
+                return 0;
+
+        /* usually extent in the path covers blocks smaller
+         * then *logical, but it can be that extent is the
+         * first one in the file */
+
+        ex = path[depth].p_ext;
+        ee_len = ext4_ext_get_actual_len(ex);
+        if (*logical < le32_to_cpu(ex->ee_block)) {
+                BUG_ON(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex);
+                while (--depth >= 0) {
+                        ix = path[depth].p_idx;
+                        BUG_ON(ix != EXT_FIRST_INDEX(path[depth].p_hdr));
+                }
+                return 0;
+        }
+
+        BUG_ON(*logical < (le32_to_cpu(ex->ee_block) + ee_len));
+
+        *logical = le32_to_cpu(ex->ee_block) + ee_len - 1;
+        *phys = ext_pblock(ex) + ee_len - 1;
+        return 0;
+}
+
+/*
+ * search the closest allocated block to the right for *logical
+ * and returns it at @logical + it's physical address at @phys
+ * if *logical is the smallest allocated block, the function
+ * returns 0 at @phys
+ * return value contains 0 (success) or error code
+ */
+int
+ext4_ext_search_right(struct inode *inode, struct ext4_ext_path *path,
+                        ext4_lblk_t *logical, ext4_fsblk_t *phys)
+{
+        struct buffer_head *bh = NULL;
+        struct ext4_extent_header *eh;
+        struct ext4_extent_idx *ix;
+        struct ext4_extent *ex;
+        ext4_fsblk_t block;
+        int depth, ee_len;
+
+        BUG_ON(path == NULL);
+        depth = path->p_depth;
+        *phys = 0;
+
+        if (depth == 0 && path->p_ext == NULL)
+                return 0;
+
+        /* usually extent in the path covers blocks smaller
+         * then *logical, but it can be that extent is the
+         * first one in the file */
+
+        ex = path[depth].p_ext;
+        ee_len = ext4_ext_get_actual_len(ex);
+        if (*logical < le32_to_cpu(ex->ee_block)) {
+                BUG_ON(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex);
+                while (--depth >= 0) {
+                        ix = path[depth].p_idx;
+                        BUG_ON(ix != EXT_FIRST_INDEX(path[depth].p_hdr));
+                }
+                *logical = le32_to_cpu(ex->ee_block);
+                *phys = ext_pblock(ex);
+                return 0;
+        }
+
+        BUG_ON(*logical < (le32_to_cpu(ex->ee_block) + ee_len));
+
+        if (ex != EXT_LAST_EXTENT(path[depth].p_hdr)) {
+                /* next allocated block in this leaf */
+                ex++;
+                *logical = le32_to_cpu(ex->ee_block);
+                *phys = ext_pblock(ex);
+                return 0;
+        }
+
+        /* go up and search for index to the right */
+        while (--depth >= 0) {
+                ix = path[depth].p_idx;
+                if (ix != EXT_LAST_INDEX(path[depth].p_hdr))
+                        break;
+        }
+
+        if (depth < 0) {
+                /* we've gone up to the root and
+                 * found no index to the right */
+                return 0;
+        }
+
+        /* we've found index to the right, let's
+         * follow it and find the closest allocated
+         * block to the right */
+        ix++;
+        block = idx_pblock(ix);
+        while (++depth < path->p_depth) {
+                bh = sb_bread(inode->i_sb, block);
+                if (bh == NULL)
+                        return -EIO;
+                eh = ext_block_hdr(bh);
+                if (ext4_ext_check_header(inode, eh, depth)) {
+                        put_bh(bh);
+                        return -EIO;
+                }
+                ix = EXT_FIRST_INDEX(eh);
+                block = idx_pblock(ix);
+                put_bh(bh);
+        }
+
+        bh = sb_bread(inode->i_sb, block);
+        if (bh == NULL)
+                return -EIO;
+        eh = ext_block_hdr(bh);
+        if (ext4_ext_check_header(inode, eh, path->p_depth - depth)) {
+                put_bh(bh);
+                return -EIO;
+        }
+        ex = EXT_FIRST_EXTENT(eh);
+        *logical = le32_to_cpu(ex->ee_block);
+        *phys = ext_pblock(ex);
+        put_bh(bh);
+        return 0;
+
+}
+
+/*
  * ext4_ext_next_allocated_block:
  * returns allocated block in subsequent extent or EXT_MAX_BLOCK.
  * NOTE: it considers block number from index entry as
  * allocated block. Thus, index entries have to be consistent
  * with leaves.
  */
-static unsigned long
+static ext4_lblk_t
 ext4_ext_next_allocated_block(struct ext4_ext_path *path)
 {
         int depth;
@@ -1054,7 +1200,7 @@ ext4_ext_next_allocated_block(struct ext4_ext_path *path)
  * ext4_ext_next_leaf_block:
  * returns first allocated block from next leaf or EXT_MAX_BLOCK
  */
-static unsigned ext4_ext_next_leaf_block(struct inode *inode,
+static ext4_lblk_t ext4_ext_next_leaf_block(struct inode *inode,
                                         struct ext4_ext_path *path)
 {
         int depth;
@@ -1072,7 +1218,8 @@ static unsigned ext4_ext_next_leaf_block(struct inode *inode,
         while (depth >= 0) {
                 if (path[depth].p_idx !=
                                 EXT_LAST_INDEX(path[depth].p_hdr))
-                  return le32_to_cpu(path[depth].p_idx[1].ei_block);
+                        return (ext4_lblk_t)
+                                le32_to_cpu(path[depth].p_idx[1].ei_block);
                 depth--;
         }
 
@@ -1085,7 +1232,7 @@ static unsigned ext4_ext_next_leaf_block(struct inode *inode,
  * then we have to correct all indexes above.
  * TODO: do we need to correct tree in all cases?
  */
-int ext4_ext_correct_indexes(handle_t *handle, struct inode *inode,
+static int ext4_ext_correct_indexes(handle_t *handle, struct inode *inode,
                                 struct ext4_ext_path *path)
 {
         struct ext4_extent_header *eh;
@@ -1171,7 +1318,7 @@ ext4_can_extents_be_merged(struct inode *inode, struct ext4_extent *ex1,
         if (ext1_ee_len + ext2_ee_len > max_len)
                 return 0;
 #ifdef AGGRESSIVE_TEST
-        if (le16_to_cpu(ex1->ee_len) >= 4)
+        if (ext1_ee_len >= 4)
                 return 0;
 #endif
 
@@ -1239,7 +1386,7 @@ unsigned int ext4_ext_check_overlap(struct inode *inode,
                                     struct ext4_extent *newext,
                                     struct ext4_ext_path *path)
 {
-        unsigned long b1, b2;
+        ext4_lblk_t b1, b2;
         unsigned int depth, len1;
         unsigned int ret = 0;
 
@@ -1260,7 +1407,7 @@ unsigned int ext4_ext_check_overlap(struct inode *inode,
                         goto out;
         }
 
-        /* check for wrap through zero */
+        /* check for wrap through zero on extent logical start block*/
         if (b1 + len1 < b1) {
                 len1 = EXT_MAX_BLOCK - b1;
                 newext->ee_len = cpu_to_le16(len1);
@@ -1290,7 +1437,8 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
         struct ext4_extent *ex, *fex;
         struct ext4_extent *nearex; /* nearest extent */
         struct ext4_ext_path *npath = NULL;
-        int depth, len, err, next;
+        int depth, len, err;
+        ext4_lblk_t next;
         unsigned uninitialized = 0;
 
         BUG_ON(ext4_ext_get_actual_len(newext) == 0);
@@ -1435,114 +1583,8 @@ cleanup:
         return err;
 }
 
-int ext4_ext_walk_space(struct inode *inode, unsigned long block,
-                        unsigned long num, ext_prepare_callback func,
-                        void *cbdata)
-{
-        struct ext4_ext_path *path = NULL;
-        struct ext4_ext_cache cbex;
-        struct ext4_extent *ex;
-        unsigned long next, start = 0, end = 0;
-        unsigned long last = block + num;
-        int depth, exists, err = 0;
-
-        BUG_ON(func == NULL);
-        BUG_ON(inode == NULL);
-
-        while (block < last && block != EXT_MAX_BLOCK) {
-                num = last - block;
-                /* find extent for this block */
-                path = ext4_ext_find_extent(inode, block, path);
-                if (IS_ERR(path)) {
-                        err = PTR_ERR(path);
-                        path = NULL;
-                        break;
-                }
-
-                depth = ext_depth(inode);
-                BUG_ON(path[depth].p_hdr == NULL);
-                ex = path[depth].p_ext;
-                next = ext4_ext_next_allocated_block(path);
-
-                exists = 0;
-                if (!ex) {
-                        /* there is no extent yet, so try to allocate
-                         * all requested space */
-                        start = block;
-                        end = block + num;
-                } else if (le32_to_cpu(ex->ee_block) > block) {
-                        /* need to allocate space before found extent */
-                        start = block;
-                        end = le32_to_cpu(ex->ee_block);
-                        if (block + num < end)
-                                end = block + num;
-                } else if (block >= le32_to_cpu(ex->ee_block)
-                                        + ext4_ext_get_actual_len(ex)) {
-                        /* need to allocate space after found extent */
-                        start = block;
-                        end = block + num;
-                        if (end >= next)
-                                end = next;
-                } else if (block >= le32_to_cpu(ex->ee_block)) {
-                        /*
-                         * some part of requested space is covered
-                         * by found extent
-                         */
-                        start = block;
-                        end = le32_to_cpu(ex->ee_block)
-                                + ext4_ext_get_actual_len(ex);
-                        if (block + num < end)
-                                end = block + num;
-                        exists = 1;
-                } else {
-                        BUG();
-                }
-                BUG_ON(end <= start);
-
-                if (!exists) {
-                        cbex.ec_block = start;
-                        cbex.ec_len = end - start;
-                        cbex.ec_start = 0;
-                        cbex.ec_type = EXT4_EXT_CACHE_GAP;
-                } else {
-                        cbex.ec_block = le32_to_cpu(ex->ee_block);
-                        cbex.ec_len = ext4_ext_get_actual_len(ex);
-                        cbex.ec_start = ext_pblock(ex);
-                        cbex.ec_type = EXT4_EXT_CACHE_EXTENT;
-                }
-
-                BUG_ON(cbex.ec_len == 0);
-                err = func(inode, path, &cbex, cbdata);
-                ext4_ext_drop_refs(path);
-
-                if (err < 0)
-                        break;
-                if (err == EXT_REPEAT)
-                        continue;
-                else if (err == EXT_BREAK) {
-                        err = 0;
-                        break;
-                }
-
-                if (ext_depth(inode) != depth) {
-                        /* depth was changed. we have to realloc path */
-                        kfree(path);
-                        path = NULL;
-                }
-
-                block = cbex.ec_block + cbex.ec_len;
-        }
-
-        if (path) {
-                ext4_ext_drop_refs(path);
-                kfree(path);
-        }
-
-        return err;
-}
-
 static void
-ext4_ext_put_in_cache(struct inode *inode, __u32 block,
+ext4_ext_put_in_cache(struct inode *inode, ext4_lblk_t block,
                         __u32 len, ext4_fsblk_t start, int type)
 {
         struct ext4_ext_cache *cex;
@@ -1561,10 +1603,11 @@ ext4_ext_put_in_cache(struct inode *inode, __u32 block,
  */
 static void
 ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
-                                unsigned long block)
+                                ext4_lblk_t block)
 {
         int depth = ext_depth(inode);
-        unsigned long lblock, len;
+        unsigned long len;
+        ext4_lblk_t lblock;
         struct ext4_extent *ex;
 
         ex = path[depth].p_ext;
@@ -1576,32 +1619,34 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
         } else if (block < le32_to_cpu(ex->ee_block)) {
                 lblock = block;
                 len = le32_to_cpu(ex->ee_block) - block;
-                ext_debug("cache gap(before): %lu [%lu:%lu]",
-                                (unsigned long) block,
-                                (unsigned long) le32_to_cpu(ex->ee_block),
-                                (unsigned long) ext4_ext_get_actual_len(ex));
+                ext_debug("cache gap(before): %u [%u:%u]",
+                                block,
+                                le32_to_cpu(ex->ee_block),
+                                 ext4_ext_get_actual_len(ex));
         } else if (block >= le32_to_cpu(ex->ee_block)
                         + ext4_ext_get_actual_len(ex)) {
+                ext4_lblk_t next;
                 lblock = le32_to_cpu(ex->ee_block)
                         + ext4_ext_get_actual_len(ex);
-                len = ext4_ext_next_allocated_block(path);
-                ext_debug("cache gap(after): [%lu:%lu] %lu",
-                                (unsigned long) le32_to_cpu(ex->ee_block),
-                                (unsigned long) ext4_ext_get_actual_len(ex),
-                                (unsigned long) block);
-                BUG_ON(len == lblock);
-                len = len - lblock;
+
+                next = ext4_ext_next_allocated_block(path);
+                ext_debug("cache gap(after): [%u:%u] %u",
+                                le32_to_cpu(ex->ee_block),
+                                ext4_ext_get_actual_len(ex),
+                                block);
+                BUG_ON(next == lblock);
+                len = next - lblock;
         } else {
                 lblock = len = 0;
                 BUG();
         }
 
-        ext_debug(" -> %lu:%lu\n", (unsigned long) lblock, len);
+        ext_debug(" -> %u:%lu\n", lblock, len);
         ext4_ext_put_in_cache(inode, lblock, len, 0, EXT4_EXT_CACHE_GAP);
 }
 
 static int
-ext4_ext_in_cache(struct inode *inode, unsigned long block,
+ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block,
                         struct ext4_extent *ex)
 {
         struct ext4_ext_cache *cex;
@@ -1618,11 +1663,9 @@ ext4_ext_in_cache(struct inode *inode, unsigned long block,
                 ex->ee_block = cpu_to_le32(cex->ec_block);
                 ext4_ext_store_pblock(ex, cex->ec_start);
                 ex->ee_len = cpu_to_le16(cex->ec_len);
-                ext_debug("%lu cached by %lu:%lu:%llu\n",
-                                (unsigned long) block,
-                                (unsigned long) cex->ec_block,
-                                (unsigned long) cex->ec_len,
-                                cex->ec_start);
+                ext_debug("%u cached by %u:%u:%llu\n",
+                                block,
+                                cex->ec_block, cex->ec_len, cex->ec_start);
                 return cex->ec_type;
         }
 
@@ -1636,7 +1679,7 @@ ext4_ext_in_cache(struct inode *inode, unsigned long block,
  * It's used in truncate case only, thus all requests are for
  * last index in the block only.
  */
-int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
+static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
                         struct ext4_ext_path *path)
 {
         struct buffer_head *bh;
@@ -1657,7 +1700,7 @@ int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
         ext_debug("index is empty, remove it, free block %llu\n", leaf);
         bh = sb_find_get_block(inode->i_sb, leaf);
         ext4_forget(handle, 1, inode, bh, leaf);
-        ext4_free_blocks(handle, inode, leaf, 1);
+        ext4_free_blocks(handle, inode, leaf, 1, 1);
         return err;
 }
 
@@ -1666,7 +1709,7 @@ int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
  * This routine returns max. credits that the extent tree can consume.
  * It should be OK for low-performance paths like ->writepage()
  * To allow many writing processes to fit into a single transaction,
- * the caller should calculate credits under truncate_mutex and
+ * the caller should calculate credits under i_data_sem and
  * pass the actual path.
  */
 int ext4_ext_calc_credits_for_insert(struct inode *inode,
@@ -1714,12 +1757,14 @@ int ext4_ext_calc_credits_for_insert(struct inode *inode,
 
 static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
                                 struct ext4_extent *ex,
-                                unsigned long from, unsigned long to)
+                                ext4_lblk_t from, ext4_lblk_t to)
 {
         struct buffer_head *bh;
         unsigned short ee_len =  ext4_ext_get_actual_len(ex);
-        int i;
+        int i, metadata = 0;
 
+        if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
+                metadata = 1;
 #ifdef EXTENTS_STATS
         {
                 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -1738,42 +1783,45 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
         if (from >= le32_to_cpu(ex->ee_block)
             && to == le32_to_cpu(ex->ee_block) + ee_len - 1) {
                 /* tail removal */
-                unsigned long num;
+                ext4_lblk_t num;
                 ext4_fsblk_t start;
+
                 num = le32_to_cpu(ex->ee_block) + ee_len - from;
                 start = ext_pblock(ex) + ee_len - num;
-                ext_debug("free last %lu blocks starting %llu\n", num, start);
+                ext_debug("free last %u blocks starting %llu\n", num, start);
                 for (i = 0; i < num; i++) {
                         bh = sb_find_get_block(inode->i_sb, start + i);
                         ext4_forget(handle, 0, inode, bh, start + i);
                 }
-                ext4_free_blocks(handle, inode, start, num);
+                ext4_free_blocks(handle, inode, start, num, metadata);
         } else if (from == le32_to_cpu(ex->ee_block)
                    && to <= le32_to_cpu(ex->ee_block) + ee_len - 1) {
-                printk("strange request: removal %lu-%lu from %u:%u\n",
+                printk(KERN_INFO "strange request: removal %u-%u from %u:%u\n",
                         from, to, le32_to_cpu(ex->ee_block), ee_len);
         } else {
-                printk("strange request: removal(2) %lu-%lu from %u:%u\n",
-                        from, to, le32_to_cpu(ex->ee_block), ee_len);
+                printk(KERN_INFO "strange request: removal(2) "
+                                "%u-%u from %u:%u\n",
+                                from, to, le32_to_cpu(ex->ee_block), ee_len);
         }
         return 0;
 }
 
 static int
 ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
-                struct ext4_ext_path *path, unsigned long start)
+                struct ext4_ext_path *path, ext4_lblk_t start)
 {
         int err = 0, correct_index = 0;
         int depth = ext_depth(inode), credits;
         struct ext4_extent_header *eh;
-        unsigned a, b, block, num;
-        unsigned long ex_ee_block;
+        ext4_lblk_t a, b, block;
+        unsigned num;
+        ext4_lblk_t ex_ee_block;
         unsigned short ex_ee_len;
         unsigned uninitialized = 0;
         struct ext4_extent *ex;
 
         /* the header must be checked already in ext4_ext_remove_space() */
-        ext_debug("truncate since %lu in leaf\n", start);
+        ext_debug("truncate since %u in leaf\n", start);
         if (!path[depth].p_hdr)
                 path[depth].p_hdr = ext_block_hdr(path[depth].p_bh);
         eh = path[depth].p_hdr;
@@ -1904,7 +1952,7 @@ ext4_ext_more_to_rm(struct ext4_ext_path *path)
         return 1;
 }
 
-int ext4_ext_remove_space(struct inode *inode, unsigned long start)
+static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start)
 {
         struct super_block *sb = inode->i_sb;
         int depth = ext_depth(inode);
@@ -1912,7 +1960,7 @@ int ext4_ext_remove_space(struct inode *inode, unsigned long start)
         handle_t *handle;
         int i = 0, err = 0;
 
-        ext_debug("truncate since %lu\n", start);
+        ext_debug("truncate since %u\n", start);
 
         /* probably first extent we're gonna free will be last in block */
         handle = ext4_journal_start(inode, depth + 1);
@@ -2094,17 +2142,19 @@ void ext4_ext_release(struct super_block *sb)
  *   b> Splits in two extents: Write is happening at either end of the extent
  *   c> Splits in three extents: Somone is writing in middle of the extent
  */
-int ext4_ext_convert_to_initialized(handle_t *handle, struct inode *inode,
-                                        struct ext4_ext_path *path,
-                                        ext4_fsblk_t iblock,
-                                        unsigned long max_blocks)
+static int ext4_ext_convert_to_initialized(handle_t *handle,
+                                                struct inode *inode,
+                                                struct ext4_ext_path *path,
+                                                ext4_lblk_t iblock,
+                                                unsigned long max_blocks)
 {
         struct ext4_extent *ex, newex;
         struct ext4_extent *ex1 = NULL;
         struct ext4_extent *ex2 = NULL;
         struct ext4_extent *ex3 = NULL;
         struct ext4_extent_header *eh;
-        unsigned int allocated, ee_block, ee_len, depth;
+        ext4_lblk_t ee_block;
+        unsigned int allocated, ee_len, depth;
         ext4_fsblk_t newblock;
         int err = 0;
         int ret = 0;
@@ -2225,8 +2275,13 @@ out:
         return err ? err : allocated;
 }
 
+/*
+ * Need to be called with
+ * down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block
+ * (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
+ */
 int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
-                        ext4_fsblk_t iblock,
+                        ext4_lblk_t iblock,
                         unsigned long max_blocks, struct buffer_head *bh_result,
                         int create, int extend_disksize)
 {
@@ -2236,11 +2291,11 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
         ext4_fsblk_t goal, newblock;
         int err = 0, depth, ret;
         unsigned long allocated = 0;
+        struct ext4_allocation_request ar;
 
         __clear_bit(BH_New, &bh_result->b_state);
-        ext_debug("blocks %d/%lu requested for inode %u\n", (int) iblock,
-                        max_blocks, (unsigned) inode->i_ino);
-        mutex_lock(&EXT4_I(inode)->truncate_mutex);
+        ext_debug("blocks %u/%lu requested for inode %u\n",
+                        iblock, max_blocks, inode->i_ino);
 
         /* check in cache */
         goal = ext4_ext_in_cache(inode, iblock, &newex);
@@ -2260,7 +2315,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
                                    - le32_to_cpu(newex.ee_block)
                                    + ext_pblock(&newex);
                         /* number of remaining blocks in the extent */
-                        allocated = le16_to_cpu(newex.ee_len) -
+                        allocated = ext4_ext_get_actual_len(&newex) -
                                         (iblock - le32_to_cpu(newex.ee_block));
                         goto out;
                 } else {
@@ -2288,7 +2343,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 
         ex = path[depth].p_ext;
         if (ex) {
-                unsigned long ee_block = le32_to_cpu(ex->ee_block);
+                ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block);
                 ext4_fsblk_t ee_start = ext_pblock(ex);
                 unsigned short ee_len;
 
@@ -2302,7 +2357,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
                         newblock = iblock - ee_block + ee_start;
                         /* number of remaining blocks in the extent */
                         allocated = ee_len - (iblock - ee_block);
-                        ext_debug("%d fit into %lu:%d -> %llu\n", (int) iblock,
+                        ext_debug("%u fit into %lu:%d -> %llu\n", iblock,
                                         ee_block, ee_len, newblock);
 
                         /* Do not put uninitialized extent in the cache */
@@ -2320,9 +2375,10 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
                         ret = ext4_ext_convert_to_initialized(handle, inode,
                                                                 path, iblock,
                                                                 max_blocks);
-                        if (ret <= 0)
+                        if (ret <= 0) {
+                                err = ret;
                                 goto out2;
-                        else
+                        } else
                                 allocated = ret;
                         goto outnew;
                 }
@@ -2347,8 +2403,15 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
         if (S_ISREG(inode->i_mode) && (!EXT4_I(inode)->i_block_alloc_info))
                 ext4_init_block_alloc_info(inode);
 
-        /* allocate new block */
-        goal = ext4_ext_find_goal(inode, path, iblock);
+        /* find neighbour allocated blocks */
+        ar.lleft = iblock;
+        err = ext4_ext_search_left(inode, path, &ar.lleft, &ar.pleft);
+        if (err)
+                goto out2;
+        ar.lright = iblock;
+        err = ext4_ext_search_right(inode, path, &ar.lright, &ar.pright);
+        if (err)
+                goto out2;
 
         /*
          * See if request is beyond maximum number of blocks we can have in
@@ -2368,10 +2431,21 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
         newex.ee_len = cpu_to_le16(max_blocks);
         err = ext4_ext_check_overlap(inode, &newex, path);
         if (err)
-                allocated = le16_to_cpu(newex.ee_len);
+                allocated = ext4_ext_get_actual_len(&newex);
         else
                 allocated = max_blocks;
-        newblock = ext4_new_blocks(handle, inode, goal, &allocated, &err);
+
+        /* allocate new block */
+        ar.inode = inode;
+        ar.goal = ext4_ext_find_goal(inode, path, iblock);
+        ar.logical = iblock;
+        ar.len = allocated;
+        if (S_ISREG(inode->i_mode))
+                ar.flags = EXT4_MB_HINT_DATA;
+        else
+                /* disable in-core preallocation for non-regular files */
+                ar.flags = 0;
+        newblock = ext4_mb_new_blocks(handle, &ar, &err);
         if (!newblock)
                 goto out2;
         ext_debug("allocate new block: goal %llu, found %llu/%lu\n",
@@ -2379,14 +2453,17 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 
         /* try to insert new extent into found leaf and return */
         ext4_ext_store_pblock(&newex, newblock);
-        newex.ee_len = cpu_to_le16(allocated);
+        newex.ee_len = cpu_to_le16(ar.len);
         if (create == EXT4_CREATE_UNINITIALIZED_EXT)  /* Mark uninitialized */
                 ext4_ext_mark_uninitialized(&newex);
         err = ext4_ext_insert_extent(handle, inode, path, &newex);
         if (err) {
                 /* free data blocks we just allocated */
+                /* not a good idea to call discard here directly,
+                 * but otherwise we'd need to call it every free() */
+                ext4_mb_discard_inode_preallocations(inode);
                 ext4_free_blocks(handle, inode, ext_pblock(&newex),
-                                        le16_to_cpu(newex.ee_len));
+                                        ext4_ext_get_actual_len(&newex), 0);
                 goto out2;
         }
 
@@ -2395,6 +2472,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 
         /* previous routine could use block we allocated */
         newblock = ext_pblock(&newex);
+        allocated = ext4_ext_get_actual_len(&newex);
 outnew:
         __set_bit(BH_New, &bh_result->b_state);
 
@@ -2414,8 +2492,6 @@ out2:
                 ext4_ext_drop_refs(path);
                 kfree(path);
         }
-        mutex_unlock(&EXT4_I(inode)->truncate_mutex);
-
         return err ? err : allocated;
 }
 
@@ -2423,7 +2499,7 @@ void ext4_ext_truncate(struct inode * inode, struct page *page)
 {
         struct address_space *mapping = inode->i_mapping;
         struct super_block *sb = inode->i_sb;
-        unsigned long last_block;
+        ext4_lblk_t last_block;
         handle_t *handle;
         int err = 0;
 
@@ -2445,9 +2521,11 @@ void ext4_ext_truncate(struct inode * inode, struct page *page)
         if (page)
                 ext4_block_truncate_page(handle, page, mapping, inode->i_size);
 
-        mutex_lock(&EXT4_I(inode)->truncate_mutex);
+        down_write(&EXT4_I(inode)->i_data_sem);
         ext4_ext_invalidate_cache(inode);
 
+        ext4_mb_discard_inode_preallocations(inode);
+
         /*
          * TODO: optimization is possible here.
          * Probably we need not scan at all,
@@ -2481,7 +2559,7 @@ out_stop:
         if (inode->i_nlink)
                 ext4_orphan_del(handle, inode);
 
-        mutex_unlock(&EXT4_I(inode)->truncate_mutex);
+        up_write(&EXT4_I(inode)->i_data_sem);
         ext4_journal_stop(handle);
 }
 
@@ -2516,7 +2594,8 @@ int ext4_ext_writepage_trans_blocks(struct inode *inode, int num)
 long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
 {
         handle_t *handle;
-        ext4_fsblk_t block, max_blocks;
+        ext4_lblk_t block;
+        unsigned long max_blocks;
         ext4_fsblk_t nblocks = 0;
         int ret = 0;
         int ret2 = 0;
@@ -2544,6 +2623,7 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
          * modify 1 super block, 1 block bitmap and 1 group descriptor.
          */
         credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + 3;
+        down_write((&EXT4_I(inode)->i_data_sem));
 retry:
         while (ret >= 0 && ret < max_blocks) {
                 block = block + ret;
@@ -2557,12 +2637,12 @@ retry:
                 ret = ext4_ext_get_blocks(handle, inode, block,
                                           max_blocks, &map_bh,
                                           EXT4_CREATE_UNINITIALIZED_EXT, 0);
-                WARN_ON(!ret);
-                if (!ret) {
+                WARN_ON(ret <= 0);
+                if (ret <= 0) {
                         ext4_error(inode->i_sb, "ext4_fallocate",
-                                   "ext4_ext_get_blocks returned 0! inode#%lu"
-                                   ", block=%llu, max_blocks=%llu",
-                                   inode->i_ino, block, max_blocks);
+                                    "ext4_ext_get_blocks returned error: "
+                                    "inode#%lu, block=%u, max_blocks=%lu",
+                                    inode->i_ino, block, max_blocks);
                         ret = -EIO;
                         ext4_mark_inode_dirty(handle, inode);
                         ret2 = ext4_journal_stop(handle);
@@ -2600,6 +2680,7 @@ retry:
         if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
                 goto retry;
 
+        up_write((&EXT4_I(inode)->i_data_sem));
         /*
          * Time to update the file size.
          * Update only when preallocation was requested beyond the file size.
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 1a81cd66d63b..ac35ec58db55 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -37,9 +37,9 @@ static int ext4_release_file (struct inode * inode, struct file * filp)
         if ((filp->f_mode & FMODE_WRITE) &&
                         (atomic_read(&inode->i_writecount) == 1))
         {
-                mutex_lock(&EXT4_I(inode)->truncate_mutex);
+                down_write(&EXT4_I(inode)->i_data_sem);
                 ext4_discard_reservation(inode);
-                mutex_unlock(&EXT4_I(inode)->truncate_mutex);
+                up_write(&EXT4_I(inode)->i_data_sem);
         }
         if (is_dx(inode) && filp->private_data)
                 ext4_htree_free_dir_info(filp->private_data);
@@ -56,8 +56,25 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
         ssize_t ret;
         int err;
 
-        ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
+        /*
+         * If we have encountered a bitmap-format file, the size limit
+         * is smaller than s_maxbytes, which is for extent-mapped files.
+         */
+
+        if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)) {
+                struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+                size_t length = iov_length(iov, nr_segs);
 
+                if (pos > sbi->s_bitmap_maxbytes)
+                        return -EFBIG;
+
+                if (pos + length > sbi->s_bitmap_maxbytes) {
+                        nr_segs = iov_shorten((struct iovec *)iov, nr_segs,
+                                              sbi->s_bitmap_maxbytes - pos);
+                }
+        }
+
+        ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
         /*
          * Skip flushing if there was an error, or if nothing was written.
          */
diff --git a/fs/ext4/group.h b/fs/ext4/group.h
index 1577910bb58b..7eb0604e7eea 100644
--- a/fs/ext4/group.h
+++ b/fs/ext4/group.h
@@ -14,14 +14,16 @@ extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group,
 extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group,
                                        struct ext4_group_desc *gdp);
 struct buffer_head *read_block_bitmap(struct super_block *sb,
-                                      unsigned int block_group);
+                                      ext4_group_t block_group);
 extern unsigned ext4_init_block_bitmap(struct super_block *sb,
-                                       struct buffer_head *bh, int group,
+                                       struct buffer_head *bh,
+                                       ext4_group_t group,
                                        struct ext4_group_desc *desc);
 #define ext4_free_blocks_after_init(sb, group, desc)                    \
                 ext4_init_block_bitmap(sb, NULL, group, desc)
 extern unsigned ext4_init_inode_bitmap(struct super_block *sb,
-                                       struct buffer_head *bh, int group,
+                                       struct buffer_head *bh,
+                                       ext4_group_t group,
                                        struct ext4_group_desc *desc);
 extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap);
 #endif /* _LINUX_EXT4_GROUP_H */
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index c61f37fd3f05..575b5215c808 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -64,8 +64,8 @@ void mark_bitmap_end(int start_bit, int end_bit, char *bitmap)
 }
 
 /* Initializes an uninitialized inode bitmap */
-unsigned ext4_init_inode_bitmap(struct super_block *sb,
-                                struct buffer_head *bh, int block_group,
+unsigned ext4_init_inode_bitmap(struct super_block *sb, struct buffer_head *bh,
+                                ext4_group_t block_group,
                                 struct ext4_group_desc *gdp)
 {
         struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -75,7 +75,7 @@ unsigned ext4_init_inode_bitmap(struct super_block *sb,
         /* If checksum is bad mark all blocks and inodes use to prevent
          * allocation, essentially implementing a per-group read-only flag. */
         if (!ext4_group_desc_csum_verify(sbi, block_group, gdp)) {
-                ext4_error(sb, __FUNCTION__, "Checksum bad for group %u\n",
+                ext4_error(sb, __FUNCTION__, "Checksum bad for group %lu\n",
                            block_group);
                 gdp->bg_free_blocks_count = 0;
                 gdp->bg_free_inodes_count = 0;
@@ -98,7 +98,7 @@ unsigned ext4_init_inode_bitmap(struct super_block *sb,
  * Return buffer_head of bitmap on success or NULL.
  */
 static struct buffer_head *
-read_inode_bitmap(struct super_block * sb, unsigned long block_group)
+read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
 {
         struct ext4_group_desc *desc;
         struct buffer_head *bh = NULL;
@@ -152,7 +152,7 @@ void ext4_free_inode (handle_t *handle, struct inode * inode)
         unsigned long ino;
         struct buffer_head *bitmap_bh = NULL;
         struct buffer_head *bh2;
-        unsigned long block_group;
+        ext4_group_t block_group;
         unsigned long bit;
         struct ext4_group_desc * gdp;
         struct ext4_super_block * es;
@@ -260,12 +260,14 @@ error_return:
  * For other inodes, search forward from the parent directory\'s block
  * group to find a free inode.
  */
-static int find_group_dir(struct super_block *sb, struct inode *parent)
+static int find_group_dir(struct super_block *sb, struct inode *parent,
+                                ext4_group_t *best_group)
 {
-        int ngroups = EXT4_SB(sb)->s_groups_count;
+        ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
         unsigned int freei, avefreei;
         struct ext4_group_desc *desc, *best_desc = NULL;
-        int group, best_group = -1;
+        ext4_group_t group;
+        int ret = -1;
 
         freei = percpu_counter_read_positive(&EXT4_SB(sb)->s_freeinodes_counter);
         avefreei = freei / ngroups;
@@ -279,11 +281,12 @@ static int find_group_dir(struct super_block *sb, struct inode *parent)
                 if (!best_desc ||
                     (le16_to_cpu(desc->bg_free_blocks_count) >
                      le16_to_cpu(best_desc->bg_free_blocks_count))) {
-                        best_group = group;
+                        *best_group = group;
                         best_desc = desc;
+                        ret = 0;
                 }
         }
-        return best_group;
+        return ret;
 }
 
 /*
@@ -314,12 +317,13 @@ static int find_group_dir(struct super_block *sb, struct inode *parent)
 #define INODE_COST 64
 #define BLOCK_COST 256
 
-static int find_group_orlov(struct super_block *sb, struct inode *parent)
+static int find_group_orlov(struct super_block *sb, struct inode *parent,
+                                ext4_group_t *group)
 {
-        int parent_group = EXT4_I(parent)->i_block_group;
+        ext4_group_t parent_group = EXT4_I(parent)->i_block_group;
         struct ext4_sb_info *sbi = EXT4_SB(sb);
         struct ext4_super_block *es = sbi->s_es;
-        int ngroups = sbi->s_groups_count;
+        ext4_group_t ngroups = sbi->s_groups_count;
         int inodes_per_group = EXT4_INODES_PER_GROUP(sb);
         unsigned int freei, avefreei;
         ext4_fsblk_t freeb, avefreeb;
@@ -327,7 +331,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
         unsigned int ndirs;
         int max_debt, max_dirs, min_inodes;
         ext4_grpblk_t min_blocks;
-        int group = -1, i;
+        ext4_group_t i;
         struct ext4_group_desc *desc;
 
         freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
@@ -340,13 +344,14 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
         if ((parent == sb->s_root->d_inode) ||
             (EXT4_I(parent)->i_flags & EXT4_TOPDIR_FL)) {
                 int best_ndir = inodes_per_group;
-                int best_group = -1;
+                ext4_group_t grp;
+                int ret = -1;
 
-                get_random_bytes(&group, sizeof(group));
-                parent_group = (unsigned)group % ngroups;
+                get_random_bytes(&grp, sizeof(grp));
+                parent_group = (unsigned)grp % ngroups;
                 for (i = 0; i < ngroups; i++) {
-                        group = (parent_group + i) % ngroups;
-                        desc = ext4_get_group_desc (sb, group, NULL);
+                        grp = (parent_group + i) % ngroups;
+                        desc = ext4_get_group_desc(sb, grp, NULL);
                         if (!desc || !desc->bg_free_inodes_count)
                                 continue;
                         if (le16_to_cpu(desc->bg_used_dirs_count) >= best_ndir)
@@ -355,11 +360,12 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
                                 continue;
                         if (le16_to_cpu(desc->bg_free_blocks_count) < avefreeb)
                                 continue;
-                        best_group = group;
+                        *group = grp;
+                        ret = 0;
                         best_ndir = le16_to_cpu(desc->bg_used_dirs_count);
                 }
-                if (best_group >= 0)
-                        return best_group;
+                if (ret == 0)
+                        return ret;
                 goto fallback;
         }
 
@@ -380,8 +386,8 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
                 max_debt = 1;
 
         for (i = 0; i < ngroups; i++) {
-                group = (parent_group + i) % ngroups;
-                desc = ext4_get_group_desc (sb, group, NULL);
+                *group = (parent_group + i) % ngroups;
+                desc = ext4_get_group_desc(sb, *group, NULL);
                 if (!desc || !desc->bg_free_inodes_count)
                         continue;
                 if (le16_to_cpu(desc->bg_used_dirs_count) >= max_dirs)
@@ -390,17 +396,16 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
                         continue;
                 if (le16_to_cpu(desc->bg_free_blocks_count) < min_blocks)
                         continue;
-                return group;
+                return 0;
         }
 
 fallback:
         for (i = 0; i < ngroups; i++) {
-                group = (parent_group + i) % ngroups;
-                desc = ext4_get_group_desc (sb, group, NULL);
-                if (!desc || !desc->bg_free_inodes_count)
-                        continue;
-                if (le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
-                        return group;
+                *group = (parent_group + i) % ngroups;
+                desc = ext4_get_group_desc(sb, *group, NULL);
+                if (desc && desc->bg_free_inodes_count &&
+                        le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
+                        return 0;
         }
 
         if (avefreei) {
@@ -415,21 +420,22 @@ fallback:
         return -1;
 }
 
-static int find_group_other(struct super_block *sb, struct inode *parent)
+static int find_group_other(struct super_block *sb, struct inode *parent,
+                                ext4_group_t *group)
 {
-        int parent_group = EXT4_I(parent)->i_block_group;
-        int ngroups = EXT4_SB(sb)->s_groups_count;
+        ext4_group_t parent_group = EXT4_I(parent)->i_block_group;
+        ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
         struct ext4_group_desc *desc;
-        int group, i;
+        ext4_group_t i;
 
         /*
          * Try to place the inode in its parent directory
          */
-        group = parent_group;
-        desc = ext4_get_group_desc (sb, group, NULL);
+        *group = parent_group;
+        desc = ext4_get_group_desc(sb, *group, NULL);
         if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
                         le16_to_cpu(desc->bg_free_blocks_count))
-                return group;
+                return 0;
 
         /*
          * We're going to place this inode in a different blockgroup from its
@@ -440,33 +446,33 @@ static int find_group_other(struct super_block *sb, struct inode *parent)
          *
          * So add our directory's i_ino into the starting point for the hash.
          */
-        group = (group + parent->i_ino) % ngroups;
+        *group = (*group + parent->i_ino) % ngroups;
 
         /*
          * Use a quadratic hash to find a group with a free inode and some free
          * blocks.
          */
         for (i = 1; i < ngroups; i <<= 1) {
-                group += i;
-                if (group >= ngroups)
-                        group -= ngroups;
-                desc = ext4_get_group_desc (sb, group, NULL);
+                *group += i;
+                if (*group >= ngroups)
+                        *group -= ngroups;
+                desc = ext4_get_group_desc(sb, *group, NULL);
                 if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
                                 le16_to_cpu(desc->bg_free_blocks_count))
-                        return group;
+                        return 0;
         }
 
         /*
          * That failed: try linear search for a free inode, even if that group
          * has no free blocks.
          */
-        group = parent_group;
+        *group = parent_group;
         for (i = 0; i < ngroups; i++) {
-                if (++group >= ngroups)
-                        group = 0;
-                desc = ext4_get_group_desc (sb, group, NULL);
+                if (++*group >= ngroups)
+                        *group = 0;
+                desc = ext4_get_group_desc(sb, *group, NULL);
                 if (desc && le16_to_cpu(desc->bg_free_inodes_count))
-                        return group;
+                        return 0;
         }
 
         return -1;
@@ -487,16 +493,17 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode * dir, int mode)
         struct super_block *sb;
         struct buffer_head *bitmap_bh = NULL;
         struct buffer_head *bh2;
-        int group;
+        ext4_group_t group = 0;
         unsigned long ino = 0;
         struct inode * inode;
         struct ext4_group_desc * gdp = NULL;
         struct ext4_super_block * es;
         struct ext4_inode_info *ei;
         struct ext4_sb_info *sbi;
-        int err = 0;
+        int ret2, err = 0;
         struct inode *ret;
-        int i, free = 0;
+        ext4_group_t i;
+        int free = 0;
 
         /* Cannot create files in a deleted directory */
         if (!dir || !dir->i_nlink)
@@ -512,14 +519,14 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode * dir, int mode)
         es = sbi->s_es;
         if (S_ISDIR(mode)) {
                 if (test_opt (sb, OLDALLOC))
-                        group = find_group_dir(sb, dir);
+                        ret2 = find_group_dir(sb, dir, &group);
                 else
-                        group = find_group_orlov(sb, dir);
+                        ret2 = find_group_orlov(sb, dir, &group);
         } else
-                group = find_group_other(sb, dir);
+                ret2 = find_group_other(sb, dir, &group);
 
         err = -ENOSPC;
-        if (group == -1)
+        if (ret2 == -1)
                 goto out;
 
         for (i = 0; i < sbi->s_groups_count; i++) {
@@ -583,7 +590,7 @@ got:
             ino > EXT4_INODES_PER_GROUP(sb)) {
                 ext4_error(sb, __FUNCTION__,
                            "reserved inode or inode > inodes count - "
-                           "block_group = %d, inode=%lu", group,
+                           "block_group = %lu, inode=%lu", group,
                            ino + group * EXT4_INODES_PER_GROUP(sb));
                 err = -EIO;
                 goto fail;
@@ -702,7 +709,6 @@ got:
         if (!S_ISDIR(mode))
                 ei->i_flags &= ~EXT4_DIRSYNC_FL;
         ei->i_file_acl = 0;
-        ei->i_dir_acl = 0;
         ei->i_dtime = 0;
         ei->i_block_alloc_info = NULL;
         ei->i_block_group = group;
@@ -741,13 +747,10 @@ got:
         if (test_opt(sb, EXTENTS)) {
                 EXT4_I(inode)->i_flags |= EXT4_EXTENTS_FL;
                 ext4_ext_tree_init(handle, inode);
-                if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
-                        err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
-                        if (err) goto fail;
-                        EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS);
-                        BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "call ext4_journal_dirty_metadata");
-                        err = ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
-                }
+                err = ext4_update_incompat_feature(handle, sb,
+                                                EXT4_FEATURE_INCOMPAT_EXTENTS);
+                if (err)
+                        goto fail;
         }
 
         ext4_debug("allocating inode %lu\n", inode->i_ino);
@@ -777,7 +780,7 @@ fail_drop:
 struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino)
 {
         unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count);
-        unsigned long block_group;
+        ext4_group_t block_group;
         int bit;
         struct buffer_head *bitmap_bh = NULL;
         struct inode *inode = NULL;
@@ -833,7 +836,7 @@ unsigned long ext4_count_free_inodes (struct super_block * sb)
 {
         unsigned long desc_count;
         struct ext4_group_desc *gdp;
-        int i;
+        ext4_group_t i;
 #ifdef EXT4FS_DEBUG
         struct ext4_super_block *es;
         unsigned long bitmap_count, x;
@@ -854,7 +857,7 @@ unsigned long ext4_count_free_inodes (struct super_block * sb)
                         continue;
 
                 x = ext4_count_free(bitmap_bh, EXT4_INODES_PER_GROUP(sb) / 8);
-                printk("group %d: stored = %d, counted = %lu\n",
+                printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n",
                         i, le16_to_cpu(gdp->bg_free_inodes_count), x);
                 bitmap_count += x;
         }
@@ -879,7 +882,7 @@ unsigned long ext4_count_free_inodes (struct super_block * sb)
 unsigned long ext4_count_dirs (struct super_block * sb)
 {
         unsigned long count = 0;
-        int i;
+        ext4_group_t i;
 
         for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
                 struct ext4_group_desc *gdp = ext4_get_group_desc (sb, i, NULL);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 5489703d9573..bb717cbb749c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -105,7 +105,7 @@ int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
  */
 static unsigned long blocks_for_truncate(struct inode *inode)
 {
-        unsigned long needed;
+        ext4_lblk_t needed;
 
         needed = inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9);
 
@@ -243,13 +243,6 @@ static inline void add_chain(Indirect *p, struct buffer_head *bh, __le32 *v)
         p->bh = bh;
 }
 
-static int verify_chain(Indirect *from, Indirect *to)
-{
-        while (from <= to && from->key == *from->p)
-                from++;
-        return (from > to);
-}
-
 /**
  *      ext4_block_to_path - parse the block number into array of offsets
  *      @inode: inode in question (we are only interested in its superblock)
@@ -282,7 +275,8 @@ static int verify_chain(Indirect *from, Indirect *to)
  */
 
 static int ext4_block_to_path(struct inode *inode,
-                        long i_block, int offsets[4], int *boundary)
+                        ext4_lblk_t i_block,
+                        ext4_lblk_t offsets[4], int *boundary)
 {
         int ptrs = EXT4_ADDR_PER_BLOCK(inode->i_sb);
         int ptrs_bits = EXT4_ADDR_PER_BLOCK_BITS(inode->i_sb);
@@ -313,7 +307,10 @@ static int ext4_block_to_path(struct inode *inode,
                 offsets[n++] = i_block & (ptrs - 1);
                 final = ptrs;
         } else {
-                ext4_warning(inode->i_sb, "ext4_block_to_path", "block > big");
+                ext4_warning(inode->i_sb, "ext4_block_to_path",
+                                "block %lu > max",
+                                i_block + direct_blocks +
+                                indirect_blocks + double_blocks);
         }
         if (boundary)
                 *boundary = final - 1 - (i_block & (ptrs - 1));
@@ -344,12 +341,14 @@ static int ext4_block_to_path(struct inode *inode,
  *              (pointer to last triple returned, *@err == 0)
  *      or when it gets an IO error reading an indirect block
  *              (ditto, *@err == -EIO)
- *      or when it notices that chain had been changed while it was reading
- *              (ditto, *@err == -EAGAIN)
  *      or when it reads all @depth-1 indirect blocks successfully and finds
  *      the whole chain, all way to the data (returns %NULL, *err == 0).
+ *
+ *      Need to be called with
+ *      down_read(&EXT4_I(inode)->i_data_sem)
  */
-static Indirect *ext4_get_branch(struct inode *inode, int depth, int *offsets,
+static Indirect *ext4_get_branch(struct inode *inode, int depth,
+                                 ext4_lblk_t  *offsets,
                                  Indirect chain[4], int *err)
 {
         struct super_block *sb = inode->i_sb;
@@ -365,9 +364,6 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth, int *offsets,
                 bh = sb_bread(sb, le32_to_cpu(p->key));
                 if (!bh)
                         goto failure;
-                /* Reader: pointers */
-                if (!verify_chain(chain, p))
-                        goto changed;
                 add_chain(++p, bh, (__le32*)bh->b_data + *++offsets);
                 /* Reader: end */
                 if (!p->key)
@@ -375,10 +371,6 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth, int *offsets,
         }
         return NULL;
 
-changed:
-        brelse(bh);
-        *err = -EAGAIN;
-        goto no_block;
 failure:
         *err = -EIO;
 no_block:
@@ -445,7 +437,7 @@ static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind)
  *      stores it in *@goal and returns zero.
  */
 
-static ext4_fsblk_t ext4_find_goal(struct inode *inode, long block,
+static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block,
                 Indirect chain[4], Indirect *partial)
 {
         struct ext4_block_alloc_info *block_i;
@@ -559,7 +551,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
         return ret;
 failed_out:
         for (i = 0; i <index; i++)
-                ext4_free_blocks(handle, inode, new_blocks[i], 1);
+                ext4_free_blocks(handle, inode, new_blocks[i], 1, 0);
         return ret;
 }
 
@@ -590,7 +582,7 @@ failed_out:
  */
 static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
                         int indirect_blks, int *blks, ext4_fsblk_t goal,
-                        int *offsets, Indirect *branch)
+                        ext4_lblk_t *offsets, Indirect *branch)
 {
         int blocksize = inode->i_sb->s_blocksize;
         int i, n = 0;
@@ -658,9 +650,9 @@ failed:
                 ext4_journal_forget(handle, branch[i].bh);
         }
         for (i = 0; i <indirect_blks; i++)
-                ext4_free_blocks(handle, inode, new_blocks[i], 1);
+                ext4_free_blocks(handle, inode, new_blocks[i], 1, 0);
 
-        ext4_free_blocks(handle, inode, new_blocks[i], num);
+        ext4_free_blocks(handle, inode, new_blocks[i], num, 0);
 
         return err;
 }
@@ -680,7 +672,7 @@ failed:
  * chain to new block and return 0.
  */
 static int ext4_splice_branch(handle_t *handle, struct inode *inode,
-                        long block, Indirect *where, int num, int blks)
+                        ext4_lblk_t block, Indirect *where, int num, int blks)
 {
         int i;
         int err = 0;
@@ -757,9 +749,10 @@ err_out:
         for (i = 1; i <= num; i++) {
                 BUFFER_TRACE(where[i].bh, "call jbd2_journal_forget");
                 ext4_journal_forget(handle, where[i].bh);
-                ext4_free_blocks(handle,inode,le32_to_cpu(where[i-1].key),1);
+                ext4_free_blocks(handle, inode,
+                                        le32_to_cpu(where[i-1].key), 1, 0);
         }
-        ext4_free_blocks(handle, inode, le32_to_cpu(where[num].key), blks);
+        ext4_free_blocks(handle, inode, le32_to_cpu(where[num].key), blks, 0);
 
         return err;
 }
@@ -782,14 +775,19 @@ err_out:
  * return > 0, # of blocks mapped or allocated.
  * return = 0, if plain lookup failed.
  * return < 0, error case.
+ *
+ *
+ * Need to be called with
+ * down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block
+ * (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem)
  */
 int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
-                sector_t iblock, unsigned long maxblocks,
+                ext4_lblk_t iblock, unsigned long maxblocks,
                 struct buffer_head *bh_result,
                 int create, int extend_disksize)
 {
         int err = -EIO;
-        int offsets[4];
+        ext4_lblk_t offsets[4];
         Indirect chain[4];
         Indirect *partial;
         ext4_fsblk_t goal;
@@ -803,7 +801,8 @@ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
 
         J_ASSERT(!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL));
         J_ASSERT(handle != NULL || create == 0);
-        depth = ext4_block_to_path(inode,iblock,offsets,&blocks_to_boundary);
+        depth = ext4_block_to_path(inode, iblock, offsets,
+                                        &blocks_to_boundary);
 
         if (depth == 0)
                 goto out;
@@ -819,18 +818,6 @@ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
                 while (count < maxblocks && count <= blocks_to_boundary) {
                         ext4_fsblk_t blk;
 
-                        if (!verify_chain(chain, partial)) {
-                                /*
-                                 * Indirect block might be removed by
-                                 * truncate while we were reading it.
-                                 * Handling of that case: forget what we've
-                                 * got now. Flag the err as EAGAIN, so it
-                                 * will reread.
-                                 */
-                                err = -EAGAIN;
-                                count = 0;
-                                break;
-                        }
                         blk = le32_to_cpu(*(chain[depth-1].p + count));
 
                         if (blk == first_block + count)
@@ -838,44 +825,13 @@ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
                         else
                                 break;
                 }
-                if (err != -EAGAIN)
-                        goto got_it;
+                goto got_it;
         }
 
         /* Next simple case - plain lookup or failed read of indirect block */
         if (!create || err == -EIO)
                 goto cleanup;
 
-        mutex_lock(&ei->truncate_mutex);
-
-        /*
-         * If the indirect block is missing while we are reading
-         * the chain(ext4_get_branch() returns -EAGAIN err), or
-         * if the chain has been changed after we grab the semaphore,
-         * (either because another process truncated this branch, or
-         * another get_block allocated this branch) re-grab the chain to see if
-         * the request block has been allocated or not.
-         *
-         * Since we already block the truncate/other get_block
-         * at this point, we will have the current copy of the chain when we
-         * splice the branch into the tree.
-         */
-        if (err == -EAGAIN || !verify_chain(chain, partial)) {
-                while (partial > chain) {
-                        brelse(partial->bh);
-                        partial--;
-                }
-                partial = ext4_get_branch(inode, depth, offsets, chain, &err);
-                if (!partial) {
-                        count++;
-                        mutex_unlock(&ei->truncate_mutex);
-                        if (err)
-                                goto cleanup;
-                        clear_buffer_new(bh_result);
-                        goto got_it;
-                }
-        }
-
         /*
          * Okay, we need to do block allocation.  Lazily initialize the block
          * allocation info here if necessary
@@ -911,13 +867,12 @@ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
                 err = ext4_splice_branch(handle, inode, iblock,
                                         partial, indirect_blks, count);
         /*
-         * i_disksize growing is protected by truncate_mutex.  Don't forget to
+         * i_disksize growing is protected by i_data_sem.  Don't forget to
          * protect it if you're about to implement concurrent
          * ext4_get_block() -bzzz
         */
         if (!err && extend_disksize && inode->i_size > ei->i_disksize)
                 ei->i_disksize = inode->i_size;
-        mutex_unlock(&ei->truncate_mutex);
         if (err)
                 goto cleanup;
 
@@ -942,6 +897,47 @@ out:
 
 #define DIO_CREDITS (EXT4_RESERVE_TRANS_BLOCKS + 32)
 
+int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
+                        unsigned long max_blocks, struct buffer_head *bh,
+                        int create, int extend_disksize)
+{
+        int retval;
+        /*
+         * Try to see if we can get  the block without requesting
+         * for new file system block.
+         */
+        down_read((&EXT4_I(inode)->i_data_sem));
+        if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
+                retval =  ext4_ext_get_blocks(handle, inode, block, max_blocks,
+                                bh, 0, 0);
+        } else {
+                retval = ext4_get_blocks_handle(handle,
+                                inode, block, max_blocks, bh, 0, 0);
+        }
+        up_read((&EXT4_I(inode)->i_data_sem));
+        if (!create || (retval > 0))
+                return retval;
+
+        /*
+         * We need to allocate new blocks which will result
+         * in i_data update
+         */
+        down_write((&EXT4_I(inode)->i_data_sem));
+        /*
+         * We need to check for EXT4 here because migrate
+         * could have changed the inode type in between
+         */
+        if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
+                retval =  ext4_ext_get_blocks(handle, inode, block, max_blocks,
+                                bh, create, extend_disksize);
+        } else {
+                retval = ext4_get_blocks_handle(handle, inode, block,
+                                max_blocks, bh, create, extend_disksize);
+        }
+        up_write((&EXT4_I(inode)->i_data_sem));
+        return retval;
+}
+
 static int ext4_get_block(struct inode *inode, sector_t iblock,
                         struct buffer_head *bh_result, int create)
 {
@@ -996,7 +992,7 @@ get_block:
  * `handle' can be NULL if create is zero
  */
 struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
-                                long block, int create, int *errp)
+                                ext4_lblk_t block, int create, int *errp)
 {
         struct buffer_head dummy;
         int fatal = 0, err;
@@ -1063,7 +1059,7 @@ err:
 }
 
 struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode,
-                               int block, int create, int *err)
+                               ext4_lblk_t block, int create, int *err)
 {
         struct buffer_head * bh;
 
@@ -1446,7 +1442,7 @@ static int jbd2_journal_dirty_data_fn(handle_t *handle, struct buffer_head *bh)
  *      ext4_file_write() -> generic_file_write() -> __alloc_pages() -> ...
  *
  * Same applies to ext4_get_block().  We will deadlock on various things like
- * lock_journal and i_truncate_mutex.
+ * lock_journal and i_data_sem
  *
  * Setting PF_MEMALLOC here doesn't work - too many internal memory
  * allocations fail.
@@ -1828,7 +1824,8 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
 {
         ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT;
         unsigned offset = from & (PAGE_CACHE_SIZE-1);
-        unsigned blocksize, iblock, length, pos;
+        unsigned blocksize, length, pos;
+        ext4_lblk_t iblock;
         struct inode *inode = mapping->host;
         struct buffer_head *bh;
         int err = 0;
@@ -1964,7 +1961,7 @@ static inline int all_zeroes(__le32 *p, __le32 *q)
  *                      (no partially truncated stuff there).  */
 
 static Indirect *ext4_find_shared(struct inode *inode, int depth,
-                        int offsets[4], Indirect chain[4], __le32 *top)
+                        ext4_lblk_t offsets[4], Indirect chain[4], __le32 *top)
 {
         Indirect *partial, *p;
         int k, err;
@@ -2048,15 +2045,15 @@ static void ext4_clear_blocks(handle_t *handle, struct inode *inode,
         for (p = first; p < last; p++) {
                 u32 nr = le32_to_cpu(*p);
                 if (nr) {
-                        struct buffer_head *bh;
+                        struct buffer_head *tbh;
 
                         *p = 0;
-                        bh = sb_find_get_block(inode->i_sb, nr);
-                        ext4_forget(handle, 0, inode, bh, nr);
+                        tbh = sb_find_get_block(inode->i_sb, nr);
+                        ext4_forget(handle, 0, inode, tbh, nr);
                 }
         }
 
-        ext4_free_blocks(handle, inode, block_to_free, count);
+        ext4_free_blocks(handle, inode, block_to_free, count, 0);
 }
 
 /**
@@ -2229,7 +2226,7 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
                                 ext4_journal_test_restart(handle, inode);
                         }
 
-                        ext4_free_blocks(handle, inode, nr, 1);
+                        ext4_free_blocks(handle, inode, nr, 1, 1);
 
                         if (parent_bh) {
                                 /*
@@ -2289,12 +2286,12 @@ void ext4_truncate(struct inode *inode)
         __le32 *i_data = ei->i_data;
         int addr_per_block = EXT4_ADDR_PER_BLOCK(inode->i_sb);
         struct address_space *mapping = inode->i_mapping;
-        int offsets[4];
+        ext4_lblk_t offsets[4];
         Indirect chain[4];
         Indirect *partial;
         __le32 nr = 0;
         int n;
-        long last_block;
+        ext4_lblk_t last_block;
         unsigned blocksize = inode->i_sb->s_blocksize;
         struct page *page;
 
@@ -2320,8 +2317,10 @@ void ext4_truncate(struct inode *inode)
                         return;
         }
 
-        if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)
-                return ext4_ext_truncate(inode, page);
+        if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
+                ext4_ext_truncate(inode, page);
+                return;
+        }
 
         handle = start_transaction(inode);
         if (IS_ERR(handle)) {
@@ -2369,7 +2368,7 @@ void ext4_truncate(struct inode *inode)
          * From here we block out all ext4_get_block() callers who want to
          * modify the block allocation tree.
          */
-        mutex_lock(&ei->truncate_mutex);
+        down_write(&ei->i_data_sem);
 
         if (n == 1) {           /* direct blocks */
                 ext4_free_data(handle, inode, NULL, i_data+offsets[0],
@@ -2433,7 +2432,7 @@ do_indirects:
 
         ext4_discard_reservation(inode);
 
-        mutex_unlock(&ei->truncate_mutex);
+        up_write(&ei->i_data_sem);
         inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
         ext4_mark_inode_dirty(handle, inode);
 
@@ -2460,7 +2459,8 @@ out_stop:
 static ext4_fsblk_t ext4_get_inode_block(struct super_block *sb,
                 unsigned long ino, struct ext4_iloc *iloc)
 {
-        unsigned long desc, group_desc, block_group;
+        unsigned long desc, group_desc;
+        ext4_group_t block_group;
         unsigned long offset;
         ext4_fsblk_t block;
         struct buffer_head *bh;
@@ -2547,7 +2547,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
                         struct ext4_group_desc *desc;
                         int inodes_per_buffer;
                         int inode_offset, i;
-                        int block_group;
+                        ext4_group_t block_group;
                         int start;
 
                         block_group = (inode->i_ino - 1) /
@@ -2660,6 +2660,28 @@ void ext4_get_inode_flags(struct ext4_inode_info *ei)
         if (flags & S_DIRSYNC)
                 ei->i_flags |= EXT4_DIRSYNC_FL;
 }
+static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode,
+                                        struct ext4_inode_info *ei)
+{
+        blkcnt_t i_blocks ;
+        struct inode *inode = &(ei->vfs_inode);
+        struct super_block *sb = inode->i_sb;
+
+        if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+                                EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
+                /* we are using combined 48 bit field */
+                i_blocks = ((u64)le16_to_cpu(raw_inode->i_blocks_high)) << 32 |
+                                        le32_to_cpu(raw_inode->i_blocks_lo);
+                if (ei->i_flags & EXT4_HUGE_FILE_FL) {
+                        /* i_blocks represent file system block size */
+                        return i_blocks  << (inode->i_blkbits - 9);
+                } else {
+                        return i_blocks;
+                }
+        } else {
+                return le32_to_cpu(raw_inode->i_blocks_lo);
+        }
+}
 
 void ext4_read_inode(struct inode * inode)
 {
@@ -2687,7 +2709,6 @@ void ext4_read_inode(struct inode * inode)
                 inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
         }
         inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
-        inode->i_size = le32_to_cpu(raw_inode->i_size);
 
         ei->i_state = 0;
         ei->i_dir_start_lookup = 0;
@@ -2709,19 +2730,15 @@ void ext4_read_inode(struct inode * inode)
                  * recovery code: that's fine, we're about to complete
                  * the process of deleting those. */
         }
-        inode->i_blocks = le32_to_cpu(raw_inode->i_blocks);
         ei->i_flags = le32_to_cpu(raw_inode->i_flags);
-        ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl);
+        inode->i_blocks = ext4_inode_blocks(raw_inode, ei);
+        ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl_lo);
         if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
-            cpu_to_le32(EXT4_OS_HURD))
+            cpu_to_le32(EXT4_OS_HURD)) {
                 ei->i_file_acl |=
                         ((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32;
-        if (!S_ISREG(inode->i_mode)) {
-                ei->i_dir_acl = le32_to_cpu(raw_inode->i_dir_acl);
-        } else {
-                inode->i_size |=
-                        ((__u64)le32_to_cpu(raw_inode->i_size_high)) << 32;
         }
+        inode->i_size = ext4_isize(raw_inode);
         ei->i_disksize = inode->i_size;
         inode->i_generation = le32_to_cpu(raw_inode->i_generation);
         ei->i_block_group = iloc.block_group;
@@ -2765,6 +2782,13 @@ void ext4_read_inode(struct inode * inode)
         EXT4_INODE_GET_XTIME(i_atime, inode, raw_inode);
         EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode);
 
+        inode->i_version = le32_to_cpu(raw_inode->i_disk_version);
+        if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
+                if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
+                        inode->i_version |=
+                        (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
+        }
+
         if (S_ISREG(inode->i_mode)) {
                 inode->i_op = &ext4_file_inode_operations;
                 inode->i_fop = &ext4_file_operations;
@@ -2797,6 +2821,55 @@ bad_inode:
         return;
 }
 
+static int ext4_inode_blocks_set(handle_t *handle,
+                                struct ext4_inode *raw_inode,
+                                struct ext4_inode_info *ei)
+{
+        struct inode *inode = &(ei->vfs_inode);
+        u64 i_blocks = inode->i_blocks;
+        struct super_block *sb = inode->i_sb;
+        int err = 0;
+
+        if (i_blocks <= ~0U) {
+                /*
+                 * i_blocks can be represnted in a 32 bit variable
+                 * as multiple of 512 bytes
+                 */
+                raw_inode->i_blocks_lo   = cpu_to_le32(i_blocks);
+                raw_inode->i_blocks_high = 0;
+                ei->i_flags &= ~EXT4_HUGE_FILE_FL;
+        } else if (i_blocks <= 0xffffffffffffULL) {
+                /*
+                 * i_blocks can be represented in a 48 bit variable
+                 * as multiple of 512 bytes
+                 */
+                err = ext4_update_rocompat_feature(handle, sb,
+                                            EXT4_FEATURE_RO_COMPAT_HUGE_FILE);
+                if (err)
+                        goto  err_out;
+                /* i_block is stored in the split  48 bit fields */
+                raw_inode->i_blocks_lo   = cpu_to_le32(i_blocks);
+                raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
+                ei->i_flags &= ~EXT4_HUGE_FILE_FL;
+        } else {
+                /*
+                 * i_blocks should be represented in a 48 bit variable
+                 * as multiple of  file system block size
+                 */
+                err = ext4_update_rocompat_feature(handle, sb,
+                                            EXT4_FEATURE_RO_COMPAT_HUGE_FILE);
+                if (err)
+                        goto  err_out;
+                ei->i_flags |= EXT4_HUGE_FILE_FL;
+                /* i_block is stored in file system block size */
+                i_blocks = i_blocks >> (inode->i_blkbits - 9);
+                raw_inode->i_blocks_lo   = cpu_to_le32(i_blocks);
+                raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
+        }
+err_out:
+        return err;
+}
+
 /*
  * Post the struct inode info into an on-disk inode location in the
  * buffer-cache.  This gobbles the caller's reference to the
@@ -2845,47 +2918,42 @@ static int ext4_do_update_inode(handle_t *handle,
                 raw_inode->i_gid_high = 0;
         }
         raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
-        raw_inode->i_size = cpu_to_le32(ei->i_disksize);
 
         EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
         EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
         EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
         EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
 
-        raw_inode->i_blocks = cpu_to_le32(inode->i_blocks);
+        if (ext4_inode_blocks_set(handle, raw_inode, ei))
+                goto out_brelse;
         raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
         raw_inode->i_flags = cpu_to_le32(ei->i_flags);
         if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
             cpu_to_le32(EXT4_OS_HURD))
                 raw_inode->i_file_acl_high =
                         cpu_to_le16(ei->i_file_acl >> 32);
-        raw_inode->i_file_acl = cpu_to_le32(ei->i_file_acl);
-        if (!S_ISREG(inode->i_mode)) {
-                raw_inode->i_dir_acl = cpu_to_le32(ei->i_dir_acl);
-        } else {
-                raw_inode->i_size_high =
-                        cpu_to_le32(ei->i_disksize >> 32);
-                if (ei->i_disksize > 0x7fffffffULL) {
-                        struct super_block *sb = inode->i_sb;
-                        if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
-                                        EXT4_FEATURE_RO_COMPAT_LARGE_FILE) ||
-                            EXT4_SB(sb)->s_es->s_rev_level ==
-                                        cpu_to_le32(EXT4_GOOD_OLD_REV)) {
-                               /* If this is the first large file
-                                * created, add a flag to the superblock.
-                                */
-                                err = ext4_journal_get_write_access(handle,
-                                                EXT4_SB(sb)->s_sbh);
-                                if (err)
-                                        goto out_brelse;
-                                ext4_update_dynamic_rev(sb);
-                                EXT4_SET_RO_COMPAT_FEATURE(sb,
+        raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
+        ext4_isize_set(raw_inode, ei->i_disksize);
+        if (ei->i_disksize > 0x7fffffffULL) {
+                struct super_block *sb = inode->i_sb;
+                if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
+                                EXT4_FEATURE_RO_COMPAT_LARGE_FILE) ||
+                                EXT4_SB(sb)->s_es->s_rev_level ==
+                                cpu_to_le32(EXT4_GOOD_OLD_REV)) {
+                        /* If this is the first large file
+                         * created, add a flag to the superblock.
+                         */
+                        err = ext4_journal_get_write_access(handle,
+                                        EXT4_SB(sb)->s_sbh);
+                        if (err)
+                                goto out_brelse;
+                        ext4_update_dynamic_rev(sb);
+                        EXT4_SET_RO_COMPAT_FEATURE(sb,
                                         EXT4_FEATURE_RO_COMPAT_LARGE_FILE);
-                                sb->s_dirt = 1;
-                                handle->h_sync = 1;
-                                err = ext4_journal_dirty_metadata(handle,
-                                                EXT4_SB(sb)->s_sbh);
-                        }
+                        sb->s_dirt = 1;
+                        handle->h_sync = 1;
+                        err = ext4_journal_dirty_metadata(handle,
+                                        EXT4_SB(sb)->s_sbh);
                 }
         }
         raw_inode->i_generation = cpu_to_le32(inode->i_generation);
@@ -2903,8 +2971,14 @@ static int ext4_do_update_inode(handle_t *handle,
         } else for (block = 0; block < EXT4_N_BLOCKS; block++)
                 raw_inode->i_block[block] = ei->i_data[block];
 
-        if (ei->i_extra_isize)
+        raw_inode->i_disk_version = cpu_to_le32(inode->i_version);
+        if (ei->i_extra_isize) {
+                if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
+                        raw_inode->i_version_hi =
+                        cpu_to_le32(inode->i_version >> 32);
                 raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
+        }
+
 
         BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
         rc = ext4_journal_dirty_metadata(handle, bh);
@@ -3024,6 +3098,17 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
                 ext4_journal_stop(handle);
         }
 
+        if (attr->ia_valid & ATTR_SIZE) {
+                if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)) {
+                        struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+
+                        if (attr->ia_size > sbi->s_bitmap_maxbytes) {
+                                error = -EFBIG;
+                                goto err_out;
+                        }
+                }
+        }
+
         if (S_ISREG(inode->i_mode) &&
             attr->ia_valid & ATTR_SIZE && attr->ia_size < inode->i_size) {
                 handle_t *handle;
@@ -3120,6 +3205,9 @@ int ext4_mark_iloc_dirty(handle_t *handle,
 {
         int err = 0;
 
+        if (test_opt(inode->i_sb, I_VERSION))
+                inode_inc_iversion(inode);
+
         /* the do_update_inode consumes one bh->b_count */
         get_bh(iloc->bh);
 
@@ -3158,8 +3246,10 @@ ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
  * Expand an inode by new_extra_isize bytes.
  * Returns 0 on success or negative error number on failure.
  */
-int ext4_expand_extra_isize(struct inode *inode, unsigned int new_extra_isize,
-                        struct ext4_iloc iloc, handle_t *handle)
+static int ext4_expand_extra_isize(struct inode *inode,
+                                   unsigned int new_extra_isize,
+                                   struct ext4_iloc iloc,
+                                   handle_t *handle)
 {
         struct ext4_inode *raw_inode;
         struct ext4_xattr_ibody_header *header;
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index e7f894bdb420..2ed7c37f897e 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -199,7 +199,7 @@ flags_err:
                  * need to allocate reservation structure for this inode
                  * before set the window size
                  */
-                mutex_lock(&ei->truncate_mutex);
+                down_write(&ei->i_data_sem);
                 if (!ei->i_block_alloc_info)
                         ext4_init_block_alloc_info(inode);
 
@@ -207,7 +207,7 @@ flags_err:
                         struct ext4_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
                         rsv->rsv_goal_size = rsv_window_size;
                 }
-                mutex_unlock(&ei->truncate_mutex);
+                up_write(&ei->i_data_sem);
                 return 0;
         }
         case EXT4_IOC_GROUP_EXTEND: {
@@ -254,6 +254,9 @@ flags_err:
                 return err;
         }
 
+        case EXT4_IOC_MIGRATE:
+                return ext4_ext_migrate(inode, filp, cmd, arg);
+
         default:
                 return -ENOTTY;
         }
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
new file mode 100644
index 000000000000..76e5fedc0a0b
--- /dev/null
+++ b/fs/ext4/mballoc.c
@@ -0,0 +1,4552 @@
+/*
+ * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
+ * Written by Alex Tomas <alex@clusterfs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public Licens
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-
+ */
+
+
+/*
+ * mballoc.c contains the multiblocks allocation routines
+ */
+
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/ext4_jbd2.h>
+#include <linux/ext4_fs.h>
+#include <linux/quotaops.h>
+#include <linux/buffer_head.h>
+#include <linux/module.h>
+#include <linux/swap.h>
+#include <linux/proc_fs.h>
+#include <linux/pagemap.h>
+#include <linux/seq_file.h>
+#include <linux/version.h>
+#include "group.h"
+
+/*
+ * MUSTDO:
+ *   - test ext4_ext_search_left() and ext4_ext_search_right()
+ *   - search for metadata in few groups
+ *
+ * TODO v4:
+ *   - normalization should take into account whether file is still open
+ *   - discard preallocations if no free space left (policy?)
+ *   - don't normalize tails
+ *   - quota
+ *   - reservation for superuser
+ *
+ * TODO v3:
+ *   - bitmap read-ahead (proposed by Oleg Drokin aka green)
+ *   - track min/max extents in each group for better group selection
+ *   - mb_mark_used() may allocate chunk right after splitting buddy
+ *   - tree of groups sorted by number of free blocks
+ *   - error handling
+ */
+
+/*
+ * The allocation request involve request for multiple number of blocks
+ * near to the goal(block) value specified.
+ *
+ * During initialization phase of the allocator we decide to use the group
+ * preallocation or inode preallocation depending on the size file. The
+ * size of the file could be the resulting file size we would have after
+ * allocation or the current file size which ever is larger. If the size is
+ * less that sbi->s_mb_stream_request we select the group
+ * preallocation. The default value of s_mb_stream_request is 16
+ * blocks. This can also be tuned via
+ * /proc/fs/ext4/<partition>/stream_req. The value is represented in terms
+ * of number of blocks.
+ *
+ * The main motivation for having small file use group preallocation is to
+ * ensure that we have small file closer in the disk.
+ *
+ * First stage the allocator looks at the inode prealloc list
+ * ext4_inode_info->i_prealloc_list contain list of prealloc spaces for
+ * this particular inode. The inode prealloc space is represented as:
+ *
+ * pa_lstart -> the logical start block for this prealloc space
+ * pa_pstart -> the physical start block for this prealloc space
+ * pa_len    -> lenght for this prealloc space
+ * pa_free   ->  free space available in this prealloc space
+ *
+ * The inode preallocation space is used looking at the _logical_ start
+ * block. If only the logical file block falls within the range of prealloc
+ * space we will consume the particular prealloc space. This make sure that
+ * that the we have contiguous physical blocks representing the file blocks
+ *
+ * The important thing to be noted in case of inode prealloc space is that
+ * we don't modify the values associated to inode prealloc space except
+ * pa_free.
+ *
+ * If we are not able to find blocks in the inode prealloc space and if we
+ * have the group allocation flag set then we look at the locality group
+ * prealloc space. These are per CPU prealloc list repreasented as
+ *
+ * ext4_sb_info.s_locality_groups[smp_processor_id()]
+ *
+ * The reason for having a per cpu locality group is to reduce the contention
+ * between CPUs. It is possible to get scheduled at this point.
+ *
+ * The locality group prealloc space is used looking at whether we have
+ * enough free space (pa_free) withing the prealloc space.
+ *
+ * If we can't allocate blocks via inode prealloc or/and locality group
+ * prealloc then we look at the buddy cache. The buddy cache is represented
+ * by ext4_sb_info.s_buddy_cache (struct inode) whose file offset gets
+ * mapped to the buddy and bitmap information regarding different
+ * groups. The buddy information is attached to buddy cache inode so that
+ * we can access them through the page cache. The information regarding
+ * each group is loaded via ext4_mb_load_buddy.  The information involve
+ * block bitmap and buddy information. The information are stored in the
+ * inode as:
+ *
+ *  {                        page                        }
+ *  [ group 0 buddy][ group 0 bitmap] [group 1][ group 1]...
+ *
+ *
+ * one block each for bitmap and buddy information.  So for each group we
+ * take up 2 blocks. A page can contain blocks_per_page (PAGE_CACHE_SIZE /
+ * blocksize) blocks.  So it can have information regarding groups_per_page
+ * which is blocks_per_page/2
+ *
+ * The buddy cache inode is not stored on disk. The inode is thrown
+ * away when the filesystem is unmounted.
+ *
+ * We look for count number of blocks in the buddy cache. If we were able
+ * to locate that many free blocks we return with additional information
+ * regarding rest of the contiguous physical block available
+ *
+ * Before allocating blocks via buddy cache we normalize the request
+ * blocks. This ensure we ask for more blocks that we needed. The extra
+ * blocks that we get after allocation is added to the respective prealloc
+ * list. In case of inode preallocation we follow a list of heuristics
+ * based on file size. This can be found in ext4_mb_normalize_request. If
+ * we are doing a group prealloc we try to normalize the request to
+ * sbi->s_mb_group_prealloc. Default value of s_mb_group_prealloc is set to
+ * 512 blocks. This can be tuned via
+ * /proc/fs/ext4/<partition/group_prealloc. The value is represented in
+ * terms of number of blocks. If we have mounted the file system with -O
+ * stripe=<value> option the group prealloc request is normalized to the
+ * stripe value (sbi->s_stripe)
+ *
+ * The regular allocator(using the buddy cache) support few tunables.
+ *
+ * /proc/fs/ext4/<partition>/min_to_scan
+ * /proc/fs/ext4/<partition>/max_to_scan
+ * /proc/fs/ext4/<partition>/order2_req
+ *
+ * The regular allocator use buddy scan only if the request len is power of
+ * 2 blocks and the order of allocation is >= sbi->s_mb_order2_reqs. The
+ * value of s_mb_order2_reqs can be tuned via
+ * /proc/fs/ext4/<partition>/order2_req.  If the request len is equal to
+ * stripe size (sbi->s_stripe), we try to search for contigous block in
+ * stripe size. This should result in better allocation on RAID setup. If
+ * not we search in the specific group using bitmap for best extents. The
+ * tunable min_to_scan and max_to_scan controll the behaviour here.
+ * min_to_scan indicate how long the mballoc __must__ look for a best
+ * extent and max_to_scanindicate how long the mballoc __can__ look for a
+ * best extent in the found extents. Searching for the blocks starts with
+ * the group specified as the goal value in allocation context via
+ * ac_g_ex. Each group is first checked based on the criteria whether it
+ * can used for allocation. ext4_mb_good_group explains how the groups are
+ * checked.
+ *
+ * Both the prealloc space are getting populated as above. So for the first
+ * request we will hit the buddy cache which will result in this prealloc
+ * space getting filled. The prealloc space is then later used for the
+ * subsequent request.
+ */
+
+/*
+ * mballoc operates on the following data:
+ *  - on-disk bitmap
+ *  - in-core buddy (actually includes buddy and bitmap)
+ *  - preallocation descriptors (PAs)
+ *
+ * there are two types of preallocations:
+ *  - inode
+ *    assiged to specific inode and can be used for this inode only.
+ *    it describes part of inode's space preallocated to specific
+ *    physical blocks. any block from that preallocated can be used
+ *    independent. the descriptor just tracks number of blocks left
+ *    unused. so, before taking some block from descriptor, one must
+ *    make sure corresponded logical block isn't allocated yet. this
+ *    also means that freeing any block within descriptor's range
+ *    must discard all preallocated blocks.
+ *  - locality group
+ *    assigned to specific locality group which does not translate to
+ *    permanent set of inodes: inode can join and leave group. space
+ *    from this type of preallocation can be used for any inode. thus
+ *    it's consumed from the beginning to the end.
+ *
+ * relation between them can be expressed as:
+ *    in-core buddy = on-disk bitmap + preallocation descriptors
+ *
+ * this mean blocks mballoc considers used are:
+ *  - allocated blocks (persistent)
+ *  - preallocated blocks (non-persistent)
+ *
+ * consistency in mballoc world means that at any time a block is either
+ * free or used in ALL structures. notice: "any time" should not be read
+ * literally -- time is discrete and delimited by locks.
+ *
+ *  to keep it simple, we don't use block numbers, instead we count number of
+ *  blocks: how many blocks marked used/free in on-disk bitmap, buddy and PA.
+ *
+ * all operations can be expressed as:
+ *  - init buddy:                       buddy = on-disk + PAs
+ *  - new PA:                           buddy += N; PA = N
+ *  - use inode PA:                     on-disk += N; PA -= N
+ *  - discard inode PA                  buddy -= on-disk - PA; PA = 0
+ *  - use locality group PA             on-disk += N; PA -= N
+ *  - discard locality group PA         buddy -= PA; PA = 0
+ *  note: 'buddy -= on-disk - PA' is used to show that on-disk bitmap
+ *        is used in real operation because we can't know actual used
+ *        bits from PA, only from on-disk bitmap
+ *
+ * if we follow this strict logic, then all operations above should be atomic.
+ * given some of them can block, we'd have to use something like semaphores
+ * killing performance on high-end SMP hardware. let's try to relax it using
+ * the following knowledge:
+ *  1) if buddy is referenced, it's already initialized
+ *  2) while block is used in buddy and the buddy is referenced,
+ *     nobody can re-allocate that block
+ *  3) we work on bitmaps and '+' actually means 'set bits'. if on-disk has
+ *     bit set and PA claims same block, it's OK. IOW, one can set bit in
+ *     on-disk bitmap if buddy has same bit set or/and PA covers corresponded
+ *     block
+ *
+ * so, now we're building a concurrency table:
+ *  - init buddy vs.
+ *    - new PA
+ *      blocks for PA are allocated in the buddy, buddy must be referenced
+ *      until PA is linked to allocation group to avoid concurrent buddy init
+ *    - use inode PA
+ *      we need to make sure that either on-disk bitmap or PA has uptodate data
+ *      given (3) we care that PA-=N operation doesn't interfere with init
+ *    - discard inode PA
+ *      the simplest way would be to have buddy initialized by the discard
+ *    - use locality group PA
+ *      again PA-=N must be serialized with init
+ *    - discard locality group PA
+ *      the simplest way would be to have buddy initialized by the discard
+ *  - new PA vs.
+ *    - use inode PA
+ *      i_data_sem serializes them
+ *    - discard inode PA
+ *      discard process must wait until PA isn't used by another process
+ *    - use locality group PA
+ *      some mutex should serialize them
+ *    - discard locality group PA
+ *      discard process must wait until PA isn't used by another process
+ *  - use inode PA
+ *    - use inode PA
+ *      i_data_sem or another mutex should serializes them
+ *    - discard inode PA
+ *      discard process must wait until PA isn't used by another process
+ *    - use locality group PA
+ *      nothing wrong here -- they're different PAs covering different blocks
+ *    - discard locality group PA
+ *      discard process must wait until PA isn't used by another process
+ *
+ * now we're ready to make few consequences:
+ *  - PA is referenced and while it is no discard is possible
+ *  - PA is referenced until block isn't marked in on-disk bitmap
+ *  - PA changes only after on-disk bitmap
+ *  - discard must not compete with init. either init is done before
+ *    any discard or they're serialized somehow
+ *  - buddy init as sum of on-disk bitmap and PAs is done atomically
+ *
+ * a special case when we've used PA to emptiness. no need to modify buddy
+ * in this case, but we should care about concurrent init
+ *
+ */
+
+ /*
+ * Logic in few words:
+ *
+ *  - allocation:
+ *    load group
+ *    find blocks
+ *    mark bits in on-disk bitmap
+ *    release group
+ *
+ *  - use preallocation:
+ *    find proper PA (per-inode or group)
+ *    load group
+ *    mark bits in on-disk bitmap
+ *    release group
+ *    release PA
+ *
+ *  - free:
+ *    load group
+ *    mark bits in on-disk bitmap
+ *    release group
+ *
+ *  - discard preallocations in group:
+ *    mark PAs deleted
+ *    move them onto local list
+ *    load on-disk bitmap
+ *    load group
+ *    remove PA from object (inode or locality group)
+ *    mark free blocks in-core
+ *
+ *  - discard inode's preallocations:
+ */
+
+/*
+ * Locking rules
+ *
+ * Locks:
+ *  - bitlock on a group        (group)
+ *  - object (inode/locality)   (object)
+ *  - per-pa lock               (pa)
+ *
+ * Paths:
+ *  - new pa
+ *    object
+ *    group
+ *
+ *  - find and use pa:
+ *    pa
+ *
+ *  - release consumed pa:
+ *    pa
+ *    group
+ *    object
+ *
+ *  - generate in-core bitmap:
+ *    group
+ *        pa
+ *
+ *  - discard all for given object (inode, locality group):
+ *    object
+ *        pa
+ *    group
+ *
+ *  - discard all for given group:
+ *    group
+ *        pa
+ *    group
+ *        object
+ *
+ */
+
+/*
+ * with AGGRESSIVE_CHECK allocator runs consistency checks over
+ * structures. these checks slow things down a lot
+ */
+#define AGGRESSIVE_CHECK__
+
+/*
+ * with DOUBLE_CHECK defined mballoc creates persistent in-core
+ * bitmaps, maintains and uses them to check for double allocations
+ */
+#define DOUBLE_CHECK__
+
+/*
+ */
+#define MB_DEBUG__
+#ifdef MB_DEBUG
+#define mb_debug(fmt, a...)     printk(fmt, ##a)
+#else
+#define mb_debug(fmt, a...)
+#endif
+
+/*
+ * with EXT4_MB_HISTORY mballoc stores last N allocations in memory
+ * and you can monitor it in /proc/fs/ext4/<dev>/mb_history
+ */
+#define EXT4_MB_HISTORY
+#define EXT4_MB_HISTORY_ALLOC           1       /* allocation */
+#define EXT4_MB_HISTORY_PREALLOC        2       /* preallocated blocks used */
+#define EXT4_MB_HISTORY_DISCARD         4       /* preallocation discarded */
+#define EXT4_MB_HISTORY_FREE            8       /* free */
+
+#define EXT4_MB_HISTORY_DEFAULT         (EXT4_MB_HISTORY_ALLOC | \
+                                         EXT4_MB_HISTORY_PREALLOC)
+
+/*
+ * How long mballoc can look for a best extent (in found extents)
+ */
+#define MB_DEFAULT_MAX_TO_SCAN          200
+
+/*
+ * How long mballoc must look for a best extent
+ */
+#define MB_DEFAULT_MIN_TO_SCAN          10
+
+/*
+ * How many groups mballoc will scan looking for the best chunk
+ */
+#define MB_DEFAULT_MAX_GROUPS_TO_SCAN   5
+
+/*
+ * with 'ext4_mb_stats' allocator will collect stats that will be
+ * shown at umount. The collecting costs though!
+ */
+#define MB_DEFAULT_STATS                1
+
+/*
+ * files smaller than MB_DEFAULT_STREAM_THRESHOLD are served
+ * by the stream allocator, which purpose is to pack requests
+ * as close each to other as possible to produce smooth I/O traffic
+ * We use locality group prealloc space for stream request.
+ * We can tune the same via /proc/fs/ext4/<parition>/stream_req
+ */
+#define MB_DEFAULT_STREAM_THRESHOLD     16      /* 64K */
+
+/*
+ * for which requests use 2^N search using buddies
+ */
+#define MB_DEFAULT_ORDER2_REQS          2
+
+/*
+ * default group prealloc size 512 blocks
+ */
+#define MB_DEFAULT_GROUP_PREALLOC       512
+
+static struct kmem_cache *ext4_pspace_cachep;
+
+#ifdef EXT4_BB_MAX_BLOCKS
+#undef EXT4_BB_MAX_BLOCKS
+#endif
+#define EXT4_BB_MAX_BLOCKS      30
+
+struct ext4_free_metadata {
+        ext4_group_t group;
+        unsigned short num;
+        ext4_grpblk_t  blocks[EXT4_BB_MAX_BLOCKS];
+        struct list_head list;
+};
+
+struct ext4_group_info {
+        unsigned long   bb_state;
+        unsigned long   bb_tid;
+        struct ext4_free_metadata *bb_md_cur;
+        unsigned short  bb_first_free;
+        unsigned short  bb_free;
+        unsigned short  bb_fragments;
+        struct          list_head bb_prealloc_list;
+#ifdef DOUBLE_CHECK
+        void            *bb_bitmap;
+#endif
+        unsigned short  bb_counters[];
+};
+
+#define EXT4_GROUP_INFO_NEED_INIT_BIT   0
+#define EXT4_GROUP_INFO_LOCKED_BIT      1
+
+#define EXT4_MB_GRP_NEED_INIT(grp)      \
+        (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
+
+
+struct ext4_prealloc_space {
+        struct list_head        pa_inode_list;
+        struct list_head        pa_group_list;
+        union {
+                struct list_head pa_tmp_list;
+                struct rcu_head pa_rcu;
+        } u;
+        spinlock_t              pa_lock;
+        atomic_t                pa_count;
+        unsigned                pa_deleted;
+        ext4_fsblk_t            pa_pstart;      /* phys. block */
+        ext4_lblk_t             pa_lstart;      /* log. block */
+        unsigned short          pa_len;         /* len of preallocated chunk */
+        unsigned short          pa_free;        /* how many blocks are free */
+        unsigned short          pa_linear;      /* consumed in one direction
+                                                 * strictly, for grp prealloc */
+        spinlock_t              *pa_obj_lock;
+        struct inode            *pa_inode;      /* hack, for history only */
+};
+
+
+struct ext4_free_extent {
+        ext4_lblk_t fe_logical;
+        ext4_grpblk_t fe_start;
+        ext4_group_t fe_group;
+        int fe_len;
+};
+
+/*
+ * Locality group:
+ *   we try to group all related changes together
+ *   so that writeback can flush/allocate them together as well
+ */
+struct ext4_locality_group {
+        /* for allocator */
+        struct mutex            lg_mutex;       /* to serialize allocates */
+        struct list_head        lg_prealloc_list;/* list of preallocations */
+        spinlock_t              lg_prealloc_lock;
+};
+
+struct ext4_allocation_context {
+        struct inode *ac_inode;
+        struct super_block *ac_sb;
+
+        /* original request */
+        struct ext4_free_extent ac_o_ex;
+
+        /* goal request (after normalization) */
+        struct ext4_free_extent ac_g_ex;
+
+        /* the best found extent */
+        struct ext4_free_extent ac_b_ex;
+
+        /* copy of the bext found extent taken before preallocation efforts */
+        struct ext4_free_extent ac_f_ex;
+
+        /* number of iterations done. we have to track to limit searching */
+        unsigned long ac_ex_scanned;
+        __u16 ac_groups_scanned;
+        __u16 ac_found;
+        __u16 ac_tail;
+        __u16 ac_buddy;
+        __u16 ac_flags;         /* allocation hints */
+        __u8 ac_status;
+        __u8 ac_criteria;
+        __u8 ac_repeats;
+        __u8 ac_2order;         /* if request is to allocate 2^N blocks and
+                                 * N > 0, the field stores N, otherwise 0 */
+        __u8 ac_op;             /* operation, for history only */
+        struct page *ac_bitmap_page;
+        struct page *ac_buddy_page;
+        struct ext4_prealloc_space *ac_pa;
+        struct ext4_locality_group *ac_lg;
+};
+
+#define AC_STATUS_CONTINUE      1
+#define AC_STATUS_FOUND         2
+#define AC_STATUS_BREAK         3
+
+struct ext4_mb_history {
+        struct ext4_free_extent orig;   /* orig allocation */
+        struct ext4_free_extent goal;   /* goal allocation */
+        struct ext4_free_extent result; /* result allocation */
+        unsigned pid;
+        unsigned ino;
+        __u16 found;    /* how many extents have been found */
+        __u16 groups;   /* how many groups have been scanned */
+        __u16 tail;     /* what tail broke some buddy */
+        __u16 buddy;    /* buddy the tail ^^^ broke */
+        __u16 flags;
+        __u8 cr:3;      /* which phase the result extent was found at */
+        __u8 op:4;
+        __u8 merged:1;
+};
+
+struct ext4_buddy {
+        struct page *bd_buddy_page;
+        void *bd_buddy;
+        struct page *bd_bitmap_page;
+        void *bd_bitmap;
+        struct ext4_group_info *bd_info;
+        struct super_block *bd_sb;
+        __u16 bd_blkbits;
+        ext4_group_t bd_group;
+};
+#define EXT4_MB_BITMAP(e4b)     ((e4b)->bd_bitmap)
+#define EXT4_MB_BUDDY(e4b)      ((e4b)->bd_buddy)
+
+#ifndef EXT4_MB_HISTORY
+static inline void ext4_mb_store_history(struct ext4_allocation_context *ac)
+{
+        return;
+}
+#else
+static void ext4_mb_store_history(struct ext4_allocation_context *ac);
+#endif
+
+#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
+
+static struct proc_dir_entry *proc_root_ext4;
+struct buffer_head *read_block_bitmap(struct super_block *, ext4_group_t);
+ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
+                        ext4_fsblk_t goal, unsigned long *count, int *errp);
+
+static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
+                                        ext4_group_t group);
+static void ext4_mb_poll_new_transaction(struct super_block *, handle_t *);
+static void ext4_mb_free_committed_blocks(struct super_block *);
+static void ext4_mb_return_to_preallocation(struct inode *inode,
+                                        struct ext4_buddy *e4b, sector_t block,
+                                        int count);
+static void ext4_mb_put_pa(struct ext4_allocation_context *,
+                        struct super_block *, struct ext4_prealloc_space *pa);
+static int ext4_mb_init_per_dev_proc(struct super_block *sb);
+static int ext4_mb_destroy_per_dev_proc(struct super_block *sb);
+
+
+static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
+{
+        struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
+
+        bit_spin_lock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
+}
+
+static inline void ext4_unlock_group(struct super_block *sb,
+                                        ext4_group_t group)
+{
+        struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
+
+        bit_spin_unlock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
+}
+
+static inline int ext4_is_group_locked(struct super_block *sb,
+                                        ext4_group_t group)
+{
+        struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
+
+        return bit_spin_is_locked(EXT4_GROUP_INFO_LOCKED_BIT,
+                                                &(grinfo->bb_state));
+}
+
+static ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
+                                        struct ext4_free_extent *fex)
+{
+        ext4_fsblk_t block;
+
+        block = (ext4_fsblk_t) fex->fe_group * EXT4_BLOCKS_PER_GROUP(sb)
+                        + fex->fe_start
+                        + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
+        return block;
+}
+
+#if BITS_PER_LONG == 64
+#define mb_correct_addr_and_bit(bit, addr)              \
+{                                                       \
+        bit += ((unsigned long) addr & 7UL) << 3;       \
+        addr = (void *) ((unsigned long) addr & ~7UL);  \
+}
+#elif BITS_PER_LONG == 32
+#define mb_correct_addr_and_bit(bit, addr)              \
+{                                                       \
+        bit += ((unsigned long) addr & 3UL) << 3;       \
+        addr = (void *) ((unsigned long) addr & ~3UL);  \
+}
+#else
+#error "how many bits you are?!"
+#endif
+
+static inline int mb_test_bit(int bit, void *addr)
+{
+        /*
+         * ext4_test_bit on architecture like powerpc
+         * needs unsigned long aligned address
+         */
+        mb_correct_addr_and_bit(bit, addr);
+        return ext4_test_bit(bit, addr);
+}
+
+static inline void mb_set_bit(int bit, void *addr)
+{
+        mb_correct_addr_and_bit(bit, addr);
+        ext4_set_bit(bit, addr);
+}
+
+static inline void mb_set_bit_atomic(spinlock_t *lock, int bit, void *addr)
+{
+        mb_correct_addr_and_bit(bit, addr);
+        ext4_set_bit_atomic(lock, bit, addr);
+}
+
+static inline void mb_clear_bit(int bit, void *addr)
+{
+        mb_correct_addr_and_bit(bit, addr);
+        ext4_clear_bit(bit, addr);
+}
+
+static inline void mb_clear_bit_atomic(spinlock_t *lock, int bit, void *addr)
+{
+        mb_correct_addr_and_bit(bit, addr);
+        ext4_clear_bit_atomic(lock, bit, addr);
+}
+
+static void *mb_find_buddy(struct ext4_buddy *e4b, int order, int *max)
+{
+        char *bb;
+
+        /* FIXME!! is this needed */
+        BUG_ON(EXT4_MB_BITMAP(e4b) == EXT4_MB_BUDDY(e4b));
+        BUG_ON(max == NULL);
+
+        if (order > e4b->bd_blkbits + 1) {
+                *max = 0;
+                return NULL;
+        }
+
+        /* at order 0 we see each particular block */
+        *max = 1 << (e4b->bd_blkbits + 3);
+        if (order == 0)
+                return EXT4_MB_BITMAP(e4b);
+
+        bb = EXT4_MB_BUDDY(e4b) + EXT4_SB(e4b->bd_sb)->s_mb_offsets[order];
+        *max = EXT4_SB(e4b->bd_sb)->s_mb_maxs[order];
+
+        return bb;
+}
+
+#ifdef DOUBLE_CHECK
+static void mb_free_blocks_double(struct inode *inode, struct ext4_buddy *e4b,
+                           int first, int count)
+{
+        int i;
+        struct super_block *sb = e4b->bd_sb;
+
+        if (unlikely(e4b->bd_info->bb_bitmap == NULL))
+                return;
+        BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group));
+        for (i = 0; i < count; i++) {
+                if (!mb_test_bit(first + i, e4b->bd_info->bb_bitmap)) {
+                        ext4_fsblk_t blocknr;
+                        blocknr = e4b->bd_group * EXT4_BLOCKS_PER_GROUP(sb);
+                        blocknr += first + i;
+                        blocknr +=
+                            le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
+
+                        ext4_error(sb, __FUNCTION__, "double-free of inode"
+                                   " %lu's block %llu(bit %u in group %lu)\n",
+                                   inode ? inode->i_ino : 0, blocknr,
+                                   first + i, e4b->bd_group);
+                }
+                mb_clear_bit(first + i, e4b->bd_info->bb_bitmap);
+        }
+}
+
+static void mb_mark_used_double(struct ext4_buddy *e4b, int first, int count)
+{
+        int i;
+
+        if (unlikely(e4b->bd_info->bb_bitmap == NULL))
+                return;
+        BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+        for (i = 0; i < count; i++) {
+                BUG_ON(mb_test_bit(first + i, e4b->bd_info->bb_bitmap));
+                mb_set_bit(first + i, e4b->bd_info->bb_bitmap);
+        }
+}
+
+static void mb_cmp_bitmaps(struct ext4_buddy *e4b, void *bitmap)
+{
+        if (memcmp(e4b->bd_info->bb_bitmap, bitmap, e4b->bd_sb->s_blocksize)) {
+                unsigned char *b1, *b2;
+                int i;
+                b1 = (unsigned char *) e4b->bd_info->bb_bitmap;
+                b2 = (unsigned char *) bitmap;
+                for (i = 0; i < e4b->bd_sb->s_blocksize; i++) {
+                        if (b1[i] != b2[i]) {
+                                printk("corruption in group %lu at byte %u(%u):"
+                                       " %x in copy != %x on disk/prealloc\n",
+                                        e4b->bd_group, i, i * 8, b1[i], b2[i]);
+                                BUG();
+                        }
+                }
+        }
+}
+
+#else
+static inline void mb_free_blocks_double(struct inode *inode,
+                                struct ext4_buddy *e4b, int first, int count)
+{
+        return;
+}
+static inline void mb_mark_used_double(struct ext4_buddy *e4b,
+                                                int first, int count)
+{
+        return;
+}
+static inline void mb_cmp_bitmaps(struct ext4_buddy *e4b, void *bitmap)
+{
+        return;
+}
+#endif
+
+#ifdef AGGRESSIVE_CHECK
+
+#define MB_CHECK_ASSERT(assert)                                         \
+do {                                                                    \
+        if (!(assert)) {                                                \
+                printk(KERN_EMERG                                       \
+                        "Assertion failure in %s() at %s:%d: \"%s\"\n", \
+                        function, file, line, # assert);                \
+                BUG();                                                  \
+        }                                                               \
+} while (0)
+
+static int __mb_check_buddy(struct ext4_buddy *e4b, char *file,
+                                const char *function, int line)
+{
+        struct super_block *sb = e4b->bd_sb;
+        int order = e4b->bd_blkbits + 1;
+        int max;
+        int max2;
+        int i;
+        int j;
+        int k;
+        int count;
+        struct ext4_group_info *grp;
+        int fragments = 0;
+        int fstart;
+        struct list_head *cur;
+        void *buddy;
+        void *buddy2;
+
+        if (!test_opt(sb, MBALLOC))
+                return 0;
+
+        {
+                static int mb_check_counter;
+                if (mb_check_counter++ % 100 != 0)
+                        return 0;
+        }
+
+        while (order > 1) {
+                buddy = mb_find_buddy(e4b, order, &max);
+                MB_CHECK_ASSERT(buddy);
+                buddy2 = mb_find_buddy(e4b, order - 1, &max2);
+                MB_CHECK_ASSERT(buddy2);
+                MB_CHECK_ASSERT(buddy != buddy2);
+                MB_CHECK_ASSERT(max * 2 == max2);
+
+                count = 0;
+                for (i = 0; i < max; i++) {
+
+                        if (mb_test_bit(i, buddy)) {
+                                /* only single bit in buddy2 may be 1 */
+                                if (!mb_test_bit(i << 1, buddy2)) {
+                                        MB_CHECK_ASSERT(
+                                                mb_test_bit((i<<1)+1, buddy2));
+                                } else if (!mb_test_bit((i << 1) + 1, buddy2)) {
+                                        MB_CHECK_ASSERT(
+                                                mb_test_bit(i << 1, buddy2));
+                                }
+                                continue;
+                        }
+
+                        /* both bits in buddy2 must be 0 */
+                        MB_CHECK_ASSERT(mb_test_bit(i << 1, buddy2));
+                        MB_CHECK_ASSERT(mb_test_bit((i << 1) + 1, buddy2));
+
+                        for (j = 0; j < (1 << order); j++) {
+                                k = (i * (1 << order)) + j;
+                                MB_CHECK_ASSERT(
+                                        !mb_test_bit(k, EXT4_MB_BITMAP(e4b)));
+                        }
+                        count++;
+                }
+                MB_CHECK_ASSERT(e4b->bd_info->bb_counters[order] == count);
+                order--;
+        }
+
+        fstart = -1;
+        buddy = mb_find_buddy(e4b, 0, &max);
+        for (i = 0; i < max; i++) {
+                if (!mb_test_bit(i, buddy)) {
+                        MB_CHECK_ASSERT(i >= e4b->bd_info->bb_first_free);
+                        if (fstart == -1) {
+                                fragments++;
+                                fstart = i;
+                        }
+                        continue;
+                }
+                fstart = -1;
+                /* check used bits only */
+                for (j = 0; j < e4b->bd_blkbits + 1; j++) {
+                        buddy2 = mb_find_buddy(e4b, j, &max2);
+                        k = i >> j;
+                        MB_CHECK_ASSERT(k < max2);
+                        MB_CHECK_ASSERT(mb_test_bit(k, buddy2));
+                }
+        }
+        MB_CHECK_ASSERT(!EXT4_MB_GRP_NEED_INIT(e4b->bd_info));
+        MB_CHECK_ASSERT(e4b->bd_info->bb_fragments == fragments);
+
+        grp = ext4_get_group_info(sb, e4b->bd_group);
+        buddy = mb_find_buddy(e4b, 0, &max);
+        list_for_each(cur, &grp->bb_prealloc_list) {
+                ext4_group_t groupnr;
+                struct ext4_prealloc_space *pa;
+                pa = list_entry(cur, struct ext4_prealloc_space, group_list);
+                ext4_get_group_no_and_offset(sb, pa->pstart, &groupnr, &k);
+                MB_CHECK_ASSERT(groupnr == e4b->bd_group);
+                for (i = 0; i < pa->len; i++)
+                        MB_CHECK_ASSERT(mb_test_bit(k + i, buddy));
+        }
+        return 0;
+}
+#undef MB_CHECK_ASSERT
+#define mb_check_buddy(e4b) __mb_check_buddy(e4b,       \
+                                        __FILE__, __FUNCTION__, __LINE__)
+#else
+#define mb_check_buddy(e4b)
+#endif
+
+/* FIXME!! need more doc */
+static void ext4_mb_mark_free_simple(struct super_block *sb,
+                                void *buddy, unsigned first, int len,
+                                        struct ext4_group_info *grp)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        unsigned short min;
+        unsigned short max;
+        unsigned short chunk;
+        unsigned short border;
+
+        BUG_ON(len >= EXT4_BLOCKS_PER_GROUP(sb));
+
+        border = 2 << sb->s_blocksize_bits;
+
+        while (len > 0) {
+                /* find how many blocks can be covered since this position */
+                max = ffs(first | border) - 1;
+
+                /* find how many blocks of power 2 we need to mark */
+                min = fls(len) - 1;
+
+                if (max < min)
+                        min = max;
+                chunk = 1 << min;
+
+                /* mark multiblock chunks only */
+                grp->bb_counters[min]++;
+                if (min > 0)
+                        mb_clear_bit(first >> min,
+                                     buddy + sbi->s_mb_offsets[min]);
+
+                len -= chunk;
+                first += chunk;
+        }
+}
+
+static void ext4_mb_generate_buddy(struct super_block *sb,
+                                void *buddy, void *bitmap, ext4_group_t group)
+{
+        struct ext4_group_info *grp = ext4_get_group_info(sb, group);
+        unsigned short max = EXT4_BLOCKS_PER_GROUP(sb);
+        unsigned short i = 0;
+        unsigned short first;
+        unsigned short len;
+        unsigned free = 0;
+        unsigned fragments = 0;
+        unsigned long long period = get_cycles();
+
+        /* initialize buddy from bitmap which is aggregation
+         * of on-disk bitmap and preallocations */
+        i = ext4_find_next_zero_bit(bitmap, max, 0);
+        grp->bb_first_free = i;
+        while (i < max) {
+                fragments++;
+                first = i;
+                i = ext4_find_next_bit(bitmap, max, i);
+                len = i - first;
+                free += len;
+                if (len > 1)
+                        ext4_mb_mark_free_simple(sb, buddy, first, len, grp);
+                else
+                        grp->bb_counters[0]++;
+                if (i < max)
+                        i = ext4_find_next_zero_bit(bitmap, max, i);
+        }
+        grp->bb_fragments = fragments;
+
+        if (free != grp->bb_free) {
+                printk(KERN_DEBUG
+                        "EXT4-fs: group %lu: %u blocks in bitmap, %u in gd\n",
+                        group, free, grp->bb_free);
+                grp->bb_free = free;
+        }
+
+        clear_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &(grp->bb_state));
+
+        period = get_cycles() - period;
+        spin_lock(&EXT4_SB(sb)->s_bal_lock);
+        EXT4_SB(sb)->s_mb_buddies_generated++;
+        EXT4_SB(sb)->s_mb_generation_time += period;
+        spin_unlock(&EXT4_SB(sb)->s_bal_lock);
+}
+
+/* The buddy information is attached the buddy cache inode
+ * for convenience. The information regarding each group
+ * is loaded via ext4_mb_load_buddy. The information involve
+ * block bitmap and buddy information. The information are
+ * stored in the inode as
+ *
+ * {                        page                        }
+ * [ group 0 buddy][ group 0 bitmap] [group 1][ group 1]...
+ *
+ *
+ * one block each for bitmap and buddy information.
+ * So for each group we take up 2 blocks. A page can
+ * contain blocks_per_page (PAGE_CACHE_SIZE / blocksize)  blocks.
+ * So it can have information regarding groups_per_page which
+ * is blocks_per_page/2
+ */
+
+static int ext4_mb_init_cache(struct page *page, char *incore)
+{
+        int blocksize;
+        int blocks_per_page;
+        int groups_per_page;
+        int err = 0;
+        int i;
+        ext4_group_t first_group;
+        int first_block;
+        struct super_block *sb;
+        struct buffer_head *bhs;
+        struct buffer_head **bh;
+        struct inode *inode;
+        char *data;
+        char *bitmap;
+
+        mb_debug("init page %lu\n", page->index);
+
+        inode = page->mapping->host;
+        sb = inode->i_sb;
+        blocksize = 1 << inode->i_blkbits;
+        blocks_per_page = PAGE_CACHE_SIZE / blocksize;
+
+        groups_per_page = blocks_per_page >> 1;
+        if (groups_per_page == 0)
+                groups_per_page = 1;
+
+        /* allocate buffer_heads to read bitmaps */
+        if (groups_per_page > 1) {
+                err = -ENOMEM;
+                i = sizeof(struct buffer_head *) * groups_per_page;
+                bh = kzalloc(i, GFP_NOFS);
+                if (bh == NULL)
+                        goto out;
+        } else
+                bh = &bhs;
+
+        first_group = page->index * blocks_per_page / 2;
+
+        /* read all groups the page covers into the cache */
+        for (i = 0; i < groups_per_page; i++) {
+                struct ext4_group_desc *desc;
+
+                if (first_group + i >= EXT4_SB(sb)->s_groups_count)
+                        break;
+
+                err = -EIO;
+                desc = ext4_get_group_desc(sb, first_group + i, NULL);
+                if (desc == NULL)
+                        goto out;
+
+                err = -ENOMEM;
+                bh[i] = sb_getblk(sb, ext4_block_bitmap(sb, desc));
+                if (bh[i] == NULL)
+                        goto out;
+
+                if (bh_uptodate_or_lock(bh[i]))
+                        continue;
+
+                if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
+                        ext4_init_block_bitmap(sb, bh[i],
+                                                first_group + i, desc);
+                        set_buffer_uptodate(bh[i]);
+                        unlock_buffer(bh[i]);
+                        continue;
+                }
+                get_bh(bh[i]);
+                bh[i]->b_end_io = end_buffer_read_sync;
+                submit_bh(READ, bh[i]);
+                mb_debug("read bitmap for group %lu\n", first_group + i);
+        }
+
+        /* wait for I/O completion */
+        for (i = 0; i < groups_per_page && bh[i]; i++)
+                wait_on_buffer(bh[i]);
+
+        err = -EIO;
+        for (i = 0; i < groups_per_page && bh[i]; i++)
+                if (!buffer_uptodate(bh[i]))
+                        goto out;
+
+        first_block = page->index * blocks_per_page;
+        for (i = 0; i < blocks_per_page; i++) {
+                int group;
+                struct ext4_group_info *grinfo;
+
+                group = (first_block + i) >> 1;
+                if (group >= EXT4_SB(sb)->s_groups_count)
+                        break;
+
+                /*
+                 * data carry information regarding this
+                 * particular group in the format specified
+                 * above
+                 *
+                 */
+                data = page_address(page) + (i * blocksize);
+                bitmap = bh[group - first_group]->b_data;
+
+                /*
+                 * We place the buddy block and bitmap block
+                 * close together
+                 */
+                if ((first_block + i) & 1) {
+                        /* this is block of buddy */
+                        BUG_ON(incore == NULL);
+                        mb_debug("put buddy for group %u in page %lu/%x\n",
+                                group, page->index, i * blocksize);
+                        memset(data, 0xff, blocksize);
+                        grinfo = ext4_get_group_info(sb, group);
+                        grinfo->bb_fragments = 0;
+                        memset(grinfo->bb_counters, 0,
+                               sizeof(unsigned short)*(sb->s_blocksize_bits+2));
+                        /*
+                         * incore got set to the group block bitmap below
+                         */
+                        ext4_mb_generate_buddy(sb, data, incore, group);
+                        incore = NULL;
+                } else {
+                        /* this is block of bitmap */
+                        BUG_ON(incore != NULL);
+                        mb_debug("put bitmap for group %u in page %lu/%x\n",
+                                group, page->index, i * blocksize);
+
+                        /* see comments in ext4_mb_put_pa() */
+                        ext4_lock_group(sb, group);
+                        memcpy(data, bitmap, blocksize);
+
+                        /* mark all preallocated blks used in in-core bitmap */
+                        ext4_mb_generate_from_pa(sb, data, group);
+                        ext4_unlock_group(sb, group);
+
+                        /* set incore so that the buddy information can be
+                         * generated using this
+                         */
+                        incore = data;
+                }
+        }
+        SetPageUptodate(page);
+
+out:
+        if (bh) {
+                for (i = 0; i < groups_per_page && bh[i]; i++)
+                        brelse(bh[i]);
+                if (bh != &bhs)
+                        kfree(bh);
+        }
+        return err;
+}
+
+static int ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group,
+                struct ext4_buddy *e4b)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        struct inode *inode = sbi->s_buddy_cache;
+        int blocks_per_page;
+        int block;
+        int pnum;
+        int poff;
+        struct page *page;
+
+        mb_debug("load group %lu\n", group);
+
+        blocks_per_page = PAGE_CACHE_SIZE / sb->s_blocksize;
+
+        e4b->bd_blkbits = sb->s_blocksize_bits;
+        e4b->bd_info = ext4_get_group_info(sb, group);
+        e4b->bd_sb = sb;
+        e4b->bd_group = group;
+        e4b->bd_buddy_page = NULL;
+        e4b->bd_bitmap_page = NULL;
+
+        /*
+         * the buddy cache inode stores the block bitmap
+         * and buddy information in consecutive blocks.
+         * So for each group we need two blocks.
+         */
+        block = group * 2;
+        pnum = block / blocks_per_page;
+        poff = block % blocks_per_page;
+
+        /* we could use find_or_create_page(), but it locks page
+         * what we'd like to avoid in fast path ... */
+        page = find_get_page(inode->i_mapping, pnum);
+        if (page == NULL || !PageUptodate(page)) {
+                if (page)
+                        page_cache_release(page);
+                page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS);
+                if (page) {
+                        BUG_ON(page->mapping != inode->i_mapping);
+                        if (!PageUptodate(page)) {
+                                ext4_mb_init_cache(page, NULL);
+                                mb_cmp_bitmaps(e4b, page_address(page) +
+                                               (poff * sb->s_blocksize));
+                        }
+                        unlock_page(page);
+                }
+        }
+        if (page == NULL || !PageUptodate(page))
+                goto err;
+        e4b->bd_bitmap_page = page;
+        e4b->bd_bitmap = page_address(page) + (poff * sb->s_blocksize);
+        mark_page_accessed(page);
+
+        block++;
+        pnum = block / blocks_per_page;
+        poff = block % blocks_per_page;
+
+        page = find_get_page(inode->i_mapping, pnum);
+        if (page == NULL || !PageUptodate(page)) {
+                if (page)
+                        page_cache_release(page);
+                page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS);
+                if (page) {
+                        BUG_ON(page->mapping != inode->i_mapping);
+                        if (!PageUptodate(page))
+                                ext4_mb_init_cache(page, e4b->bd_bitmap);
+
+                        unlock_page(page);
+                }
+        }
+        if (page == NULL || !PageUptodate(page))
+                goto err;
+        e4b->bd_buddy_page = page;
+        e4b->bd_buddy = page_address(page) + (poff * sb->s_blocksize);
+        mark_page_accessed(page);
+
+        BUG_ON(e4b->bd_bitmap_page == NULL);
+        BUG_ON(e4b->bd_buddy_page == NULL);
+
+        return 0;
+
+err:
+        if (e4b->bd_bitmap_page)
+                page_cache_release(e4b->bd_bitmap_page);
+        if (e4b->bd_buddy_page)
+                page_cache_release(e4b->bd_buddy_page);
+        e4b->bd_buddy = NULL;
+        e4b->bd_bitmap = NULL;
+        return -EIO;
+}
+
+static void ext4_mb_release_desc(struct ext4_buddy *e4b)
+{
+        if (e4b->bd_bitmap_page)
+                page_cache_release(e4b->bd_bitmap_page);
+        if (e4b->bd_buddy_page)
+                page_cache_release(e4b->bd_buddy_page);
+}
+
+
+static int mb_find_order_for_block(struct ext4_buddy *e4b, int block)
+{
+        int order = 1;
+        void *bb;
+
+        BUG_ON(EXT4_MB_BITMAP(e4b) == EXT4_MB_BUDDY(e4b));
+        BUG_ON(block >= (1 << (e4b->bd_blkbits + 3)));
+
+        bb = EXT4_MB_BUDDY(e4b);
+        while (order <= e4b->bd_blkbits + 1) {
+                block = block >> 1;
+                if (!mb_test_bit(block, bb)) {
+                        /* this block is part of buddy of order 'order' */
+                        return order;
+                }
+                bb += 1 << (e4b->bd_blkbits - order);
+                order++;
+        }
+        return 0;
+}
+
+static void mb_clear_bits(spinlock_t *lock, void *bm, int cur, int len)
+{
+        __u32 *addr;
+
+        len = cur + len;
+        while (cur < len) {
+                if ((cur & 31) == 0 && (len - cur) >= 32) {
+                        /* fast path: clear whole word at once */
+                        addr = bm + (cur >> 3);
+                        *addr = 0;
+                        cur += 32;
+                        continue;
+                }
+                mb_clear_bit_atomic(lock, cur, bm);
+                cur++;
+        }
+}
+
+static void mb_set_bits(spinlock_t *lock, void *bm, int cur, int len)
+{
+        __u32 *addr;
+
+        len = cur + len;
+        while (cur < len) {
+                if ((cur & 31) == 0 && (len - cur) >= 32) {
+                        /* fast path: set whole word at once */
+                        addr = bm + (cur >> 3);
+                        *addr = 0xffffffff;
+                        cur += 32;
+                        continue;
+                }
+                mb_set_bit_atomic(lock, cur, bm);
+                cur++;
+        }
+}
+
+static int mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
+                          int first, int count)
+{
+        int block = 0;
+        int max = 0;
+        int order;
+        void *buddy;
+        void *buddy2;
+        struct super_block *sb = e4b->bd_sb;
+
+        BUG_ON(first + count > (sb->s_blocksize << 3));
+        BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group));
+        mb_check_buddy(e4b);
+        mb_free_blocks_double(inode, e4b, first, count);
+
+        e4b->bd_info->bb_free += count;
+        if (first < e4b->bd_info->bb_first_free)
+                e4b->bd_info->bb_first_free = first;
+
+        /* let's maintain fragments counter */
+        if (first != 0)
+                block = !mb_test_bit(first - 1, EXT4_MB_BITMAP(e4b));
+        if (first + count < EXT4_SB(sb)->s_mb_maxs[0])
+                max = !mb_test_bit(first + count, EXT4_MB_BITMAP(e4b));
+        if (block && max)
+                e4b->bd_info->bb_fragments--;
+        else if (!block && !max)
+                e4b->bd_info->bb_fragments++;
+
+        /* let's maintain buddy itself */
+        while (count-- > 0) {
+                block = first++;
+                order = 0;
+
+                if (!mb_test_bit(block, EXT4_MB_BITMAP(e4b))) {
+                        ext4_fsblk_t blocknr;
+                        blocknr = e4b->bd_group * EXT4_BLOCKS_PER_GROUP(sb);
+                        blocknr += block;
+                        blocknr +=
+                            le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
+
+                        ext4_error(sb, __FUNCTION__, "double-free of inode"
+                                   " %lu's block %llu(bit %u in group %lu)\n",
+                                   inode ? inode->i_ino : 0, blocknr, block,
+                                   e4b->bd_group);
+                }
+                mb_clear_bit(block, EXT4_MB_BITMAP(e4b));
+                e4b->bd_info->bb_counters[order]++;
+
+                /* start of the buddy */
+                buddy = mb_find_buddy(e4b, order, &max);
+
+                do {
+                        block &= ~1UL;
+                        if (mb_test_bit(block, buddy) ||
+                                        mb_test_bit(block + 1, buddy))
+                                break;
+
+                        /* both the buddies are free, try to coalesce them */
+                        buddy2 = mb_find_buddy(e4b, order + 1, &max);
+
+                        if (!buddy2)
+                                break;
+
+                        if (order > 0) {
+                                /* for special purposes, we don't set
+                                 * free bits in bitmap */
+                                mb_set_bit(block, buddy);
+                                mb_set_bit(block + 1, buddy);
+                        }
+                        e4b->bd_info->bb_counters[order]--;
+                        e4b->bd_info->bb_counters[order]--;
+
+                        block = block >> 1;
+                        order++;
+                        e4b->bd_info->bb_counters[order]++;
+
+                        mb_clear_bit(block, buddy2);
+                        buddy = buddy2;
+                } while (1);
+        }
+        mb_check_buddy(e4b);
+
+        return 0;
+}
+
+static int mb_find_extent(struct ext4_buddy *e4b, int order, int block,
+                                int needed, struct ext4_free_extent *ex)
+{
+        int next = block;
+        int max;
+        int ord;
+        void *buddy;
+
+        BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+        BUG_ON(ex == NULL);
+
+        buddy = mb_find_buddy(e4b, order, &max);
+        BUG_ON(buddy == NULL);
+        BUG_ON(block >= max);
+        if (mb_test_bit(block, buddy)) {
+                ex->fe_len = 0;
+                ex->fe_start = 0;
+                ex->fe_group = 0;
+                return 0;
+        }
+
+        /* FIXME dorp order completely ? */
+        if (likely(order == 0)) {
+                /* find actual order */
+                order = mb_find_order_for_block(e4b, block);
+                block = block >> order;
+        }
+
+        ex->fe_len = 1 << order;
+        ex->fe_start = block << order;
+        ex->fe_group = e4b->bd_group;
+
+        /* calc difference from given start */
+        next = next - ex->fe_start;
+        ex->fe_len -= next;
+        ex->fe_start += next;
+
+        while (needed > ex->fe_len &&
+               (buddy = mb_find_buddy(e4b, order, &max))) {
+
+                if (block + 1 >= max)
+                        break;
+
+                next = (block + 1) * (1 << order);
+                if (mb_test_bit(next, EXT4_MB_BITMAP(e4b)))
+                        break;
+
+                ord = mb_find_order_for_block(e4b, next);
+
+                order = ord;
+                block = next >> order;
+                ex->fe_len += 1 << order;
+        }
+
+        BUG_ON(ex->fe_start + ex->fe_len > (1 << (e4b->bd_blkbits + 3)));
+        return ex->fe_len;
+}
+
+static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex)
+{
+        int ord;
+        int mlen = 0;
+        int max = 0;
+        int cur;
+        int start = ex->fe_start;
+        int len = ex->fe_len;
+        unsigned ret = 0;
+        int len0 = len;
+        void *buddy;
+
+        BUG_ON(start + len > (e4b->bd_sb->s_blocksize << 3));
+        BUG_ON(e4b->bd_group != ex->fe_group);
+        BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+        mb_check_buddy(e4b);
+        mb_mark_used_double(e4b, start, len);
+
+        e4b->bd_info->bb_free -= len;
+        if (e4b->bd_info->bb_first_free == start)
+                e4b->bd_info->bb_first_free += len;
+
+        /* let's maintain fragments counter */
+        if (start != 0)
+                mlen = !mb_test_bit(start - 1, EXT4_MB_BITMAP(e4b));
+        if (start + len < EXT4_SB(e4b->bd_sb)->s_mb_maxs[0])
+                max = !mb_test_bit(start + len, EXT4_MB_BITMAP(e4b));
+        if (mlen && max)
+                e4b->bd_info->bb_fragments++;
+        else if (!mlen && !max)
+                e4b->bd_info->bb_fragments--;
+
+        /* let's maintain buddy itself */
+        while (len) {
+                ord = mb_find_order_for_block(e4b, start);
+
+                if (((start >> ord) << ord) == start && len >= (1 << ord)) {
+                        /* the whole chunk may be allocated at once! */
+                        mlen = 1 << ord;
+                        buddy = mb_find_buddy(e4b, ord, &max);
+                        BUG_ON((start >> ord) >= max);
+                        mb_set_bit(start >> ord, buddy);
+                        e4b->bd_info->bb_counters[ord]--;
+                        start += mlen;
+                        len -= mlen;
+                        BUG_ON(len < 0);
+                        continue;
+                }
+
+                /* store for history */
+                if (ret == 0)
+                        ret = len | (ord << 16);
+
+                /* we have to split large buddy */
+                BUG_ON(ord <= 0);
+                buddy = mb_find_buddy(e4b, ord, &max);
+                mb_set_bit(start >> ord, buddy);
+                e4b->bd_info->bb_counters[ord]--;
+
+                ord--;
+                cur = (start >> ord) & ~1U;
+                buddy = mb_find_buddy(e4b, ord, &max);
+                mb_clear_bit(cur, buddy);
+                mb_clear_bit(cur + 1, buddy);
+                e4b->bd_info->bb_counters[ord]++;
+                e4b->bd_info->bb_counters[ord]++;
+        }
+
+        mb_set_bits(sb_bgl_lock(EXT4_SB(e4b->bd_sb), ex->fe_group),
+                        EXT4_MB_BITMAP(e4b), ex->fe_start, len0);
+        mb_check_buddy(e4b);
+
+        return ret;
+}
+
+/*
+ * Must be called under group lock!
+ */
+static void ext4_mb_use_best_found(struct ext4_allocation_context *ac,
+                                        struct ext4_buddy *e4b)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+        int ret;
+
+        BUG_ON(ac->ac_b_ex.fe_group != e4b->bd_group);
+        BUG_ON(ac->ac_status == AC_STATUS_FOUND);
+
+        ac->ac_b_ex.fe_len = min(ac->ac_b_ex.fe_len, ac->ac_g_ex.fe_len);
+        ac->ac_b_ex.fe_logical = ac->ac_g_ex.fe_logical;
+        ret = mb_mark_used(e4b, &ac->ac_b_ex);
+
+        /* preallocation can change ac_b_ex, thus we store actually
+         * allocated blocks for history */
+        ac->ac_f_ex = ac->ac_b_ex;
+
+        ac->ac_status = AC_STATUS_FOUND;
+        ac->ac_tail = ret & 0xffff;
+        ac->ac_buddy = ret >> 16;
+
+        /* XXXXXXX: SUCH A HORRIBLE **CK */
+        /*FIXME!! Why ? */
+        ac->ac_bitmap_page = e4b->bd_bitmap_page;
+        get_page(ac->ac_bitmap_page);
+        ac->ac_buddy_page = e4b->bd_buddy_page;
+        get_page(ac->ac_buddy_page);
+
+        /* store last allocated for subsequent stream allocation */
+        if ((ac->ac_flags & EXT4_MB_HINT_DATA)) {
+                spin_lock(&sbi->s_md_lock);
+                sbi->s_mb_last_group = ac->ac_f_ex.fe_group;
+                sbi->s_mb_last_start = ac->ac_f_ex.fe_start;
+                spin_unlock(&sbi->s_md_lock);
+        }
+}
+
+/*
+ * regular allocator, for general purposes allocation
+ */
+
+static void ext4_mb_check_limits(struct ext4_allocation_context *ac,
+                                        struct ext4_buddy *e4b,
+                                        int finish_group)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+        struct ext4_free_extent *bex = &ac->ac_b_ex;
+        struct ext4_free_extent *gex = &ac->ac_g_ex;
+        struct ext4_free_extent ex;
+        int max;
+
+        /*
+         * We don't want to scan for a whole year
+         */
+        if (ac->ac_found > sbi->s_mb_max_to_scan &&
+                        !(ac->ac_flags & EXT4_MB_HINT_FIRST)) {
+                ac->ac_status = AC_STATUS_BREAK;
+                return;
+        }
+
+        /*
+         * Haven't found good chunk so far, let's continue
+         */
+        if (bex->fe_len < gex->fe_len)
+                return;
+
+        if ((finish_group || ac->ac_found > sbi->s_mb_min_to_scan)
+                        && bex->fe_group == e4b->bd_group) {
+                /* recheck chunk's availability - we don't know
+                 * when it was found (within this lock-unlock
+                 * period or not) */
+                max = mb_find_extent(e4b, 0, bex->fe_start, gex->fe_len, &ex);
+                if (max >= gex->fe_len) {
+                        ext4_mb_use_best_found(ac, e4b);
+                        return;
+                }
+        }
+}
+
+/*
+ * The routine checks whether found extent is good enough. If it is,
+ * then the extent gets marked used and flag is set to the context
+ * to stop scanning. Otherwise, the extent is compared with the
+ * previous found extent and if new one is better, then it's stored
+ * in the context. Later, the best found extent will be used, if
+ * mballoc can't find good enough extent.
+ *
+ * FIXME: real allocation policy is to be designed yet!
+ */
+static void ext4_mb_measure_extent(struct ext4_allocation_context *ac,
+                                        struct ext4_free_extent *ex,
+                                        struct ext4_buddy *e4b)
+{
+        struct ext4_free_extent *bex = &ac->ac_b_ex;
+        struct ext4_free_extent *gex = &ac->ac_g_ex;
+
+        BUG_ON(ex->fe_len <= 0);
+        BUG_ON(ex->fe_len >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
+        BUG_ON(ex->fe_start >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
+        BUG_ON(ac->ac_status != AC_STATUS_CONTINUE);
+
+        ac->ac_found++;
+
+        /*
+         * The special case - take what you catch first
+         */
+        if (unlikely(ac->ac_flags & EXT4_MB_HINT_FIRST)) {
+                *bex = *ex;
+                ext4_mb_use_best_found(ac, e4b);
+                return;
+        }
+
+        /*
+         * Let's check whether the chuck is good enough
+         */
+        if (ex->fe_len == gex->fe_len) {
+                *bex = *ex;
+                ext4_mb_use_best_found(ac, e4b);
+                return;
+        }
+
+        /*
+         * If this is first found extent, just store it in the context
+         */
+        if (bex->fe_len == 0) {
+                *bex = *ex;
+                return;
+        }
+
+        /*
+         * If new found extent is better, store it in the context
+         */
+        if (bex->fe_len < gex->fe_len) {
+                /* if the request isn't satisfied, any found extent
+                 * larger than previous best one is better */
+                if (ex->fe_len > bex->fe_len)
+                        *bex = *ex;
+        } else if (ex->fe_len > gex->fe_len) {
+                /* if the request is satisfied, then we try to find
+                 * an extent that still satisfy the request, but is
+                 * smaller than previous one */
+                if (ex->fe_len < bex->fe_len)
+                        *bex = *ex;
+        }
+
+        ext4_mb_check_limits(ac, e4b, 0);
+}
+
+static int ext4_mb_try_best_found(struct ext4_allocation_context *ac,
+                                        struct ext4_buddy *e4b)
+{
+        struct ext4_free_extent ex = ac->ac_b_ex;
+        ext4_group_t group = ex.fe_group;
+        int max;
+        int err;
+
+        BUG_ON(ex.fe_len <= 0);
+        err = ext4_mb_load_buddy(ac->ac_sb, group, e4b);
+        if (err)
+                return err;
+
+        ext4_lock_group(ac->ac_sb, group);
+        max = mb_find_extent(e4b, 0, ex.fe_start, ex.fe_len, &ex);
+
+        if (max > 0) {
+                ac->ac_b_ex = ex;
+                ext4_mb_use_best_found(ac, e4b);
+        }
+
+        ext4_unlock_group(ac->ac_sb, group);
+        ext4_mb_release_desc(e4b);
+
+        return 0;
+}
+
+static int ext4_mb_find_by_goal(struct ext4_allocation_context *ac,
+                                struct ext4_buddy *e4b)
+{
+        ext4_group_t group = ac->ac_g_ex.fe_group;
+        int max;
+        int err;
+        struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+        struct ext4_super_block *es = sbi->s_es;
+        struct ext4_free_extent ex;
+
+        if (!(ac->ac_flags & EXT4_MB_HINT_TRY_GOAL))
+                return 0;
+
+        err = ext4_mb_load_buddy(ac->ac_sb, group, e4b);
+        if (err)
+                return err;
+
+        ext4_lock_group(ac->ac_sb, group);
+        max = mb_find_extent(e4b, 0, ac->ac_g_ex.fe_start,
+                             ac->ac_g_ex.fe_len, &ex);
+
+        if (max >= ac->ac_g_ex.fe_len && ac->ac_g_ex.fe_len == sbi->s_stripe) {
+                ext4_fsblk_t start;
+
+                start = (e4b->bd_group * EXT4_BLOCKS_PER_GROUP(ac->ac_sb)) +
+                        ex.fe_start + le32_to_cpu(es->s_first_data_block);
+                /* use do_div to get remainder (would be 64-bit modulo) */
+                if (do_div(start, sbi->s_stripe) == 0) {
+                        ac->ac_found++;
+                        ac->ac_b_ex = ex;
+                        ext4_mb_use_best_found(ac, e4b);
+                }
+        } else if (max >= ac->ac_g_ex.fe_len) {
+                BUG_ON(ex.fe_len <= 0);
+                BUG_ON(ex.fe_group != ac->ac_g_ex.fe_group);
+                BUG_ON(ex.fe_start != ac->ac_g_ex.fe_start);
+                ac->ac_found++;
+                ac->ac_b_ex = ex;
+                ext4_mb_use_best_found(ac, e4b);
+        } else if (max > 0 && (ac->ac_flags & EXT4_MB_HINT_MERGE)) {
+                /* Sometimes, caller may want to merge even small
+                 * number of blocks to an existing extent */
+                BUG_ON(ex.fe_len <= 0);
+                BUG_ON(ex.fe_group != ac->ac_g_ex.fe_group);
+                BUG_ON(ex.fe_start != ac->ac_g_ex.fe_start);
+                ac->ac_found++;
+                ac->ac_b_ex = ex;
+                ext4_mb_use_best_found(ac, e4b);
+        }
+        ext4_unlock_group(ac->ac_sb, group);
+        ext4_mb_release_desc(e4b);
+
+        return 0;
+}
+
+/*
+ * The routine scans buddy structures (not bitmap!) from given order
+ * to max order and tries to find big enough chunk to satisfy the req
+ */
+static void ext4_mb_simple_scan_group(struct ext4_allocation_context *ac,
+                                        struct ext4_buddy *e4b)
+{
+        struct super_block *sb = ac->ac_sb;
+        struct ext4_group_info *grp = e4b->bd_info;
+        void *buddy;
+        int i;
+        int k;
+        int max;
+
+        BUG_ON(ac->ac_2order <= 0);
+        for (i = ac->ac_2order; i <= sb->s_blocksize_bits + 1; i++) {
+                if (grp->bb_counters[i] == 0)
+                        continue;
+
+                buddy = mb_find_buddy(e4b, i, &max);
+                BUG_ON(buddy == NULL);
+
+                k = ext4_find_next_zero_bit(buddy, max, 0);
+                BUG_ON(k >= max);
+
+                ac->ac_found++;
+
+                ac->ac_b_ex.fe_len = 1 << i;
+                ac->ac_b_ex.fe_start = k << i;
+                ac->ac_b_ex.fe_group = e4b->bd_group;
+
+                ext4_mb_use_best_found(ac, e4b);
+
+                BUG_ON(ac->ac_b_ex.fe_len != ac->ac_g_ex.fe_len);
+
+                if (EXT4_SB(sb)->s_mb_stats)
+                        atomic_inc(&EXT4_SB(sb)->s_bal_2orders);
+
+                break;
+        }
+}
+
+/*
+ * The routine scans the group and measures all found extents.
+ * In order to optimize scanning, caller must pass number of
+ * free blocks in the group, so the routine can know upper limit.
+ */
+static void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
+                                        struct ext4_buddy *e4b)
+{
+        struct super_block *sb = ac->ac_sb;
+        void *bitmap = EXT4_MB_BITMAP(e4b);
+        struct ext4_free_extent ex;
+        int i;
+        int free;
+
+        free = e4b->bd_info->bb_free;
+        BUG_ON(free <= 0);
+
+        i = e4b->bd_info->bb_first_free;
+
+        while (free && ac->ac_status == AC_STATUS_CONTINUE) {
+                i = ext4_find_next_zero_bit(bitmap,
+                                                EXT4_BLOCKS_PER_GROUP(sb), i);
+                if (i >= EXT4_BLOCKS_PER_GROUP(sb)) {
+                        BUG_ON(free != 0);
+                        break;
+                }
+
+                mb_find_extent(e4b, 0, i, ac->ac_g_ex.fe_len, &ex);
+                BUG_ON(ex.fe_len <= 0);
+                BUG_ON(free < ex.fe_len);
+
+                ext4_mb_measure_extent(ac, &ex, e4b);
+
+                i += ex.fe_len;
+                free -= ex.fe_len;
+        }
+
+        ext4_mb_check_limits(ac, e4b, 1);
+}
+
+/*
+ * This is a special case for storages like raid5
+ * we try to find stripe-aligned chunks for stripe-size requests
+ * XXX should do so at least for multiples of stripe size as well
+ */
+static void ext4_mb_scan_aligned(struct ext4_allocation_context *ac,
+                                 struct ext4_buddy *e4b)
+{
+        struct super_block *sb = ac->ac_sb;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        void *bitmap = EXT4_MB_BITMAP(e4b);
+        struct ext4_free_extent ex;
+        ext4_fsblk_t first_group_block;
+        ext4_fsblk_t a;
+        ext4_grpblk_t i;
+        int max;
+
+        BUG_ON(sbi->s_stripe == 0);
+
+        /* find first stripe-aligned block in group */
+        first_group_block = e4b->bd_group * EXT4_BLOCKS_PER_GROUP(sb)
+                + le32_to_cpu(sbi->s_es->s_first_data_block);
+        a = first_group_block + sbi->s_stripe - 1;
+        do_div(a, sbi->s_stripe);
+        i = (a * sbi->s_stripe) - first_group_block;
+
+        while (i < EXT4_BLOCKS_PER_GROUP(sb)) {
+                if (!mb_test_bit(i, bitmap)) {
+                        max = mb_find_extent(e4b, 0, i, sbi->s_stripe, &ex);
+                        if (max >= sbi->s_stripe) {
+                                ac->ac_found++;
+                                ac->ac_b_ex = ex;
+                                ext4_mb_use_best_found(ac, e4b);
+                                break;
+                        }
+                }
+                i += sbi->s_stripe;
+        }
+}
+
+static int ext4_mb_good_group(struct ext4_allocation_context *ac,
+                                ext4_group_t group, int cr)
+{
+        unsigned free, fragments;
+        unsigned i, bits;
+        struct ext4_group_desc *desc;
+        struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group);
+
+        BUG_ON(cr < 0 || cr >= 4);
+        BUG_ON(EXT4_MB_GRP_NEED_INIT(grp));
+
+        free = grp->bb_free;
+        fragments = grp->bb_fragments;
+        if (free == 0)
+                return 0;
+        if (fragments == 0)
+                return 0;
+
+        switch (cr) {
+        case 0:
+                BUG_ON(ac->ac_2order == 0);
+                /* If this group is uninitialized, skip it initially */
+                desc = ext4_get_group_desc(ac->ac_sb, group, NULL);
+                if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))
+                        return 0;
+
+                bits = ac->ac_sb->s_blocksize_bits + 1;
+                for (i = ac->ac_2order; i <= bits; i++)
+                        if (grp->bb_counters[i] > 0)
+                                return 1;
+                break;
+        case 1:
+                if ((free / fragments) >= ac->ac_g_ex.fe_len)
+                        return 1;
+                break;
+        case 2:
+                if (free >= ac->ac_g_ex.fe_len)
+                        return 1;
+                break;
+        case 3:
+                return 1;
+        default:
+                BUG();
+        }
+
+        return 0;
+}
+
+static int ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
+{
+        ext4_group_t group;
+        ext4_group_t i;
+        int cr;
+        int err = 0;
+        int bsbits;
+        struct ext4_sb_info *sbi;
+        struct super_block *sb;
+        struct ext4_buddy e4b;
+        loff_t size, isize;
+
+        sb = ac->ac_sb;
+        sbi = EXT4_SB(sb);
+        BUG_ON(ac->ac_status == AC_STATUS_FOUND);
+
+        /* first, try the goal */
+        err = ext4_mb_find_by_goal(ac, &e4b);
+        if (err || ac->ac_status == AC_STATUS_FOUND)
+                goto out;
+
+        if (unlikely(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY))
+                goto out;
+
+        /*
+         * ac->ac2_order is set only if the fe_len is a power of 2
+         * if ac2_order is set we also set criteria to 0 so that we
+         * try exact allocation using buddy.
+         */
+        i = fls(ac->ac_g_ex.fe_len);
+        ac->ac_2order = 0;
+        /*
+         * We search using buddy data only if the order of the request
+         * is greater than equal to the sbi_s_mb_order2_reqs
+         * You can tune it via /proc/fs/ext4/<partition>/order2_req
+         */
+        if (i >= sbi->s_mb_order2_reqs) {
+                /*
+                 * This should tell if fe_len is exactly power of 2
+                 */
+                if ((ac->ac_g_ex.fe_len & (~(1 << (i - 1)))) == 0)
+                        ac->ac_2order = i - 1;
+        }
+
+        bsbits = ac->ac_sb->s_blocksize_bits;
+        /* if stream allocation is enabled, use global goal */
+        size = ac->ac_o_ex.fe_logical + ac->ac_o_ex.fe_len;
+        isize = i_size_read(ac->ac_inode) >> bsbits;
+        if (size < isize)
+                size = isize;
+
+        if (size < sbi->s_mb_stream_request &&
+                        (ac->ac_flags & EXT4_MB_HINT_DATA)) {
+                /* TBD: may be hot point */
+                spin_lock(&sbi->s_md_lock);
+                ac->ac_g_ex.fe_group = sbi->s_mb_last_group;
+                ac->ac_g_ex.fe_start = sbi->s_mb_last_start;
+                spin_unlock(&sbi->s_md_lock);
+        }
+
+        /* searching for the right group start from the goal value specified */
+        group = ac->ac_g_ex.fe_group;
+
+        /* Let's just scan groups to find more-less suitable blocks */
+        cr = ac->ac_2order ? 0 : 1;
+        /*
+         * cr == 0 try to get exact allocation,
+         * cr == 3  try to get anything
+         */
+repeat:
+        for (; cr < 4 && ac->ac_status == AC_STATUS_CONTINUE; cr++) {
+                ac->ac_criteria = cr;
+                for (i = 0; i < EXT4_SB(sb)->s_groups_count; group++, i++) {
+                        struct ext4_group_info *grp;
+                        struct ext4_group_desc *desc;
+
+                        if (group == EXT4_SB(sb)->s_groups_count)
+                                group = 0;
+
+                        /* quick check to skip empty groups */
+                        grp = ext4_get_group_info(ac->ac_sb, group);
+                        if (grp->bb_free == 0)
+                                continue;
+
+                        /*
+                         * if the group is already init we check whether it is
+                         * a good group and if not we don't load the buddy
+                         */
+                        if (EXT4_MB_GRP_NEED_INIT(grp)) {
+                                /*
+                                 * we need full data about the group
+                                 * to make a good selection
+                                 */
+                                err = ext4_mb_load_buddy(sb, group, &e4b);
+                                if (err)
+                                        goto out;
+                                ext4_mb_release_desc(&e4b);
+                        }
+
+                        /*
+                         * If the particular group doesn't satisfy our
+                         * criteria we continue with the next group
+                         */
+                        if (!ext4_mb_good_group(ac, group, cr))
+                                continue;
+
+                        err = ext4_mb_load_buddy(sb, group, &e4b);
+                        if (err)
+                                goto out;
+
+                        ext4_lock_group(sb, group);
+                        if (!ext4_mb_good_group(ac, group, cr)) {
+                                /* someone did allocation from this group */
+                                ext4_unlock_group(sb, group);
+                                ext4_mb_release_desc(&e4b);
+                                continue;
+                        }
+
+                        ac->ac_groups_scanned++;
+                        desc = ext4_get_group_desc(sb, group, NULL);
+                        if (cr == 0 || (desc->bg_flags &
+                                        cpu_to_le16(EXT4_BG_BLOCK_UNINIT) &&
+                                        ac->ac_2order != 0))
+                                ext4_mb_simple_scan_group(ac, &e4b);
+                        else if (cr == 1 &&
+                                        ac->ac_g_ex.fe_len == sbi->s_stripe)
+                                ext4_mb_scan_aligned(ac, &e4b);
+                        else
+                                ext4_mb_complex_scan_group(ac, &e4b);
+
+                        ext4_unlock_group(sb, group);
+                        ext4_mb_release_desc(&e4b);
+
+                        if (ac->ac_status != AC_STATUS_CONTINUE)
+                                break;
+                }
+        }
+
+        if (ac->ac_b_ex.fe_len > 0 && ac->ac_status != AC_STATUS_FOUND &&
+            !(ac->ac_flags & EXT4_MB_HINT_FIRST)) {
+                /*
+                 * We've been searching too long. Let's try to allocate
+                 * the best chunk we've found so far
+                 */
+
+                ext4_mb_try_best_found(ac, &e4b);
+                if (ac->ac_status != AC_STATUS_FOUND) {
+                        /*
+                         * Someone more lucky has already allocated it.
+                         * The only thing we can do is just take first
+                         * found block(s)
+                        printk(KERN_DEBUG "EXT4-fs: someone won our chunk\n");
+                         */
+                        ac->ac_b_ex.fe_group = 0;
+                        ac->ac_b_ex.fe_start = 0;
+                        ac->ac_b_ex.fe_len = 0;
+                        ac->ac_status = AC_STATUS_CONTINUE;
+                        ac->ac_flags |= EXT4_MB_HINT_FIRST;
+                        cr = 3;
+                        atomic_inc(&sbi->s_mb_lost_chunks);
+                        goto repeat;
+                }
+        }
+out:
+        return err;
+}
+
+#ifdef EXT4_MB_HISTORY
+struct ext4_mb_proc_session {
+        struct ext4_mb_history *history;
+        struct super_block *sb;
+        int start;
+        int max;
+};
+
+static void *ext4_mb_history_skip_empty(struct ext4_mb_proc_session *s,
+                                        struct ext4_mb_history *hs,
+                                        int first)
+{
+        if (hs == s->history + s->max)
+                hs = s->history;
+        if (!first && hs == s->history + s->start)
+                return NULL;
+        while (hs->orig.fe_len == 0) {
+                hs++;
+                if (hs == s->history + s->max)
+                        hs = s->history;
+                if (hs == s->history + s->start)
+                        return NULL;
+        }
+        return hs;
+}
+
+static void *ext4_mb_seq_history_start(struct seq_file *seq, loff_t *pos)
+{
+        struct ext4_mb_proc_session *s = seq->private;
+        struct ext4_mb_history *hs;
+        int l = *pos;
+
+        if (l == 0)
+                return SEQ_START_TOKEN;
+        hs = ext4_mb_history_skip_empty(s, s->history + s->start, 1);
+        if (!hs)
+                return NULL;
+        while (--l && (hs = ext4_mb_history_skip_empty(s, ++hs, 0)) != NULL);
+        return hs;
+}
+
+static void *ext4_mb_seq_history_next(struct seq_file *seq, void *v,
+                                      loff_t *pos)
+{
+        struct ext4_mb_proc_session *s = seq->private;
+        struct ext4_mb_history *hs = v;
+
+        ++*pos;
+        if (v == SEQ_START_TOKEN)
+                return ext4_mb_history_skip_empty(s, s->history + s->start, 1);
+        else
+                return ext4_mb_history_skip_empty(s, ++hs, 0);
+}
+
+static int ext4_mb_seq_history_show(struct seq_file *seq, void *v)
+{
+        char buf[25], buf2[25], buf3[25], *fmt;
+        struct ext4_mb_history *hs = v;
+
+        if (v == SEQ_START_TOKEN) {
+                seq_printf(seq, "%-5s %-8s %-23s %-23s %-23s %-5s "
+                                "%-5s %-2s %-5s %-5s %-5s %-6s\n",
+                          "pid", "inode", "original", "goal", "result", "found",
+                           "grps", "cr", "flags", "merge", "tail", "broken");
+                return 0;
+        }
+
+        if (hs->op == EXT4_MB_HISTORY_ALLOC) {
+                fmt = "%-5u %-8u %-23s %-23s %-23s %-5u %-5u %-2u "
+                        "%-5u %-5s %-5u %-6u\n";
+                sprintf(buf2, "%lu/%d/%u@%u", hs->result.fe_group,
+                        hs->result.fe_start, hs->result.fe_len,
+                        hs->result.fe_logical);
+                sprintf(buf, "%lu/%d/%u@%u", hs->orig.fe_group,
+                        hs->orig.fe_start, hs->orig.fe_len,
+                        hs->orig.fe_logical);
+                sprintf(buf3, "%lu/%d/%u@%u", hs->goal.fe_group,
+                        hs->goal.fe_start, hs->goal.fe_len,
+                        hs->goal.fe_logical);
+                seq_printf(seq, fmt, hs->pid, hs->ino, buf, buf3, buf2,
+                                hs->found, hs->groups, hs->cr, hs->flags,
+                                hs->merged ? "M" : "", hs->tail,
+                                hs->buddy ? 1 << hs->buddy : 0);
+        } else if (hs->op == EXT4_MB_HISTORY_PREALLOC) {
+                fmt = "%-5u %-8u %-23s %-23s %-23s\n";
+                sprintf(buf2, "%lu/%d/%u@%u", hs->result.fe_group,
+                        hs->result.fe_start, hs->result.fe_len,
+                        hs->result.fe_logical);
+                sprintf(buf, "%lu/%d/%u@%u", hs->orig.fe_group,
+                        hs->orig.fe_start, hs->orig.fe_len,
+                        hs->orig.fe_logical);
+                seq_printf(seq, fmt, hs->pid, hs->ino, buf, "", buf2);
+        } else if (hs->op == EXT4_MB_HISTORY_DISCARD) {
+                sprintf(buf2, "%lu/%d/%u", hs->result.fe_group,
+                        hs->result.fe_start, hs->result.fe_len);
+                seq_printf(seq, "%-5u %-8u %-23s discard\n",
+                                hs->pid, hs->ino, buf2);
+        } else if (hs->op == EXT4_MB_HISTORY_FREE) {
+                sprintf(buf2, "%lu/%d/%u", hs->result.fe_group,
+                        hs->result.fe_start, hs->result.fe_len);
+                seq_printf(seq, "%-5u %-8u %-23s free\n",
+                                hs->pid, hs->ino, buf2);
+        }
+        return 0;
+}
+
+static void ext4_mb_seq_history_stop(struct seq_file *seq, void *v)
+{
+}
+
+static struct seq_operations ext4_mb_seq_history_ops = {
+        .start  = ext4_mb_seq_history_start,
+        .next   = ext4_mb_seq_history_next,
+        .stop   = ext4_mb_seq_history_stop,
+        .show   = ext4_mb_seq_history_show,
+};
+
+static int ext4_mb_seq_history_open(struct inode *inode, struct file *file)
+{
+        struct super_block *sb = PDE(inode)->data;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        struct ext4_mb_proc_session *s;
+        int rc;
+        int size;
+
+        s = kmalloc(sizeof(*s), GFP_KERNEL);
+        if (s == NULL)
+                return -ENOMEM;
+        s->sb = sb;
+        size = sizeof(struct ext4_mb_history) * sbi->s_mb_history_max;
+        s->history = kmalloc(size, GFP_KERNEL);
+        if (s->history == NULL) {
+                kfree(s);
+                return -ENOMEM;
+        }
+
+        spin_lock(&sbi->s_mb_history_lock);
+        memcpy(s->history, sbi->s_mb_history, size);
+        s->max = sbi->s_mb_history_max;
+        s->start = sbi->s_mb_history_cur % s->max;
+        spin_unlock(&sbi->s_mb_history_lock);
+
+        rc = seq_open(file, &ext4_mb_seq_history_ops);
+        if (rc == 0) {
+                struct seq_file *m = (struct seq_file *)file->private_data;
+                m->private = s;
+        } else {
+                kfree(s->history);
+                kfree(s);
+        }
+        return rc;
+
+}
+
+static int ext4_mb_seq_history_release(struct inode *inode, struct file *file)
+{
+        struct seq_file *seq = (struct seq_file *)file->private_data;
+        struct ext4_mb_proc_session *s = seq->private;
+        kfree(s->history);
+        kfree(s);
+        return seq_release(inode, file);
+}
+
+static ssize_t ext4_mb_seq_history_write(struct file *file,
+                                const char __user *buffer,
+                                size_t count, loff_t *ppos)
+{
+        struct seq_file *seq = (struct seq_file *)file->private_data;
+        struct ext4_mb_proc_session *s = seq->private;
+        struct super_block *sb = s->sb;
+        char str[32];
+        int value;
+
+        if (count >= sizeof(str)) {
+                printk(KERN_ERR "EXT4-fs: %s string too long, max %u bytes\n",
+                                "mb_history", (int)sizeof(str));
+                return -EOVERFLOW;
+        }
+
+        if (copy_from_user(str, buffer, count))
+                return -EFAULT;
+
+        value = simple_strtol(str, NULL, 0);
+        if (value < 0)
+                return -ERANGE;
+        EXT4_SB(sb)->s_mb_history_filter = value;
+
+        return count;
+}
+
+static struct file_operations ext4_mb_seq_history_fops = {
+        .owner          = THIS_MODULE,
+        .open           = ext4_mb_seq_history_open,
+        .read           = seq_read,
+        .write          = ext4_mb_seq_history_write,
+        .llseek         = seq_lseek,
+        .release        = ext4_mb_seq_history_release,
+};
+
+static void *ext4_mb_seq_groups_start(struct seq_file *seq, loff_t *pos)
+{
+        struct super_block *sb = seq->private;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        ext4_group_t group;
+
+        if (*pos < 0 || *pos >= sbi->s_groups_count)
+                return NULL;
+
+        group = *pos + 1;
+        return (void *) group;
+}
+
+static void *ext4_mb_seq_groups_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+        struct super_block *sb = seq->private;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        ext4_group_t group;
+
+        ++*pos;
+        if (*pos < 0 || *pos >= sbi->s_groups_count)
+                return NULL;
+        group = *pos + 1;
+        return (void *) group;;
+}
+
+static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v)
+{
+        struct super_block *sb = seq->private;
+        long group = (long) v;
+        int i;
+        int err;
+        struct ext4_buddy e4b;
+        struct sg {
+                struct ext4_group_info info;
+                unsigned short counters[16];
+        } sg;
+
+        group--;
+        if (group == 0)
+                seq_printf(seq, "#%-5s: %-5s %-5s %-5s "
+                                "[ %-5s %-5s %-5s %-5s %-5s %-5s %-5s "
+                                  "%-5s %-5s %-5s %-5s %-5s %-5s %-5s ]\n",
+                           "group", "free", "frags", "first",
+                           "2^0", "2^1", "2^2", "2^3", "2^4", "2^5", "2^6",
+                           "2^7", "2^8", "2^9", "2^10", "2^11", "2^12", "2^13");
+
+        i = (sb->s_blocksize_bits + 2) * sizeof(sg.info.bb_counters[0]) +
+                sizeof(struct ext4_group_info);
+        err = ext4_mb_load_buddy(sb, group, &e4b);
+        if (err) {
+                seq_printf(seq, "#%-5lu: I/O error\n", group);
+                return 0;
+        }
+        ext4_lock_group(sb, group);
+        memcpy(&sg, ext4_get_group_info(sb, group), i);
+        ext4_unlock_group(sb, group);
+        ext4_mb_release_desc(&e4b);
+
+        seq_printf(seq, "#%-5lu: %-5u %-5u %-5u [", group, sg.info.bb_free,
+                        sg.info.bb_fragments, sg.info.bb_first_free);
+        for (i = 0; i <= 13; i++)
+                seq_printf(seq, " %-5u", i <= sb->s_blocksize_bits + 1 ?
+                                sg.info.bb_counters[i] : 0);
+        seq_printf(seq, " ]\n");
+
+        return 0;
+}
+
+static void ext4_mb_seq_groups_stop(struct seq_file *seq, void *v)
+{
+}
+
+static struct seq_operations ext4_mb_seq_groups_ops = {
+        .start  = ext4_mb_seq_groups_start,
+        .next   = ext4_mb_seq_groups_next,
+        .stop   = ext4_mb_seq_groups_stop,
+        .show   = ext4_mb_seq_groups_show,
+};
+
+static int ext4_mb_seq_groups_open(struct inode *inode, struct file *file)
+{
+        struct super_block *sb = PDE(inode)->data;
+        int rc;
+
+        rc = seq_open(file, &ext4_mb_seq_groups_ops);
+        if (rc == 0) {
+                struct seq_file *m = (struct seq_file *)file->private_data;
+                m->private = sb;
+        }
+        return rc;
+
+}
+
+static struct file_operations ext4_mb_seq_groups_fops = {
+        .owner          = THIS_MODULE,
+        .open           = ext4_mb_seq_groups_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
+static void ext4_mb_history_release(struct super_block *sb)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+        remove_proc_entry("mb_groups", sbi->s_mb_proc);
+        remove_proc_entry("mb_history", sbi->s_mb_proc);
+
+        kfree(sbi->s_mb_history);
+}
+
+static void ext4_mb_history_init(struct super_block *sb)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        int i;
+
+        if (sbi->s_mb_proc != NULL) {
+                struct proc_dir_entry *p;
+                p = create_proc_entry("mb_history", S_IRUGO, sbi->s_mb_proc);
+                if (p) {
+                        p->proc_fops = &ext4_mb_seq_history_fops;
+                        p->data = sb;
+                }
+                p = create_proc_entry("mb_groups", S_IRUGO, sbi->s_mb_proc);
+                if (p) {
+                        p->proc_fops = &ext4_mb_seq_groups_fops;
+                        p->data = sb;
+                }
+        }
+
+        sbi->s_mb_history_max = 1000;
+        sbi->s_mb_history_cur = 0;
+        spin_lock_init(&sbi->s_mb_history_lock);
+        i = sbi->s_mb_history_max * sizeof(struct ext4_mb_history);
+        sbi->s_mb_history = kmalloc(i, GFP_KERNEL);
+        if (likely(sbi->s_mb_history != NULL))
+                memset(sbi->s_mb_history, 0, i);
+        /* if we can't allocate history, then we simple won't use it */
+}
+
+static void ext4_mb_store_history(struct ext4_allocation_context *ac)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+        struct ext4_mb_history h;
+
+        if (unlikely(sbi->s_mb_history == NULL))
+                return;
+
+        if (!(ac->ac_op & sbi->s_mb_history_filter))
+                return;
+
+        h.op = ac->ac_op;
+        h.pid = current->pid;
+        h.ino = ac->ac_inode ? ac->ac_inode->i_ino : 0;
+        h.orig = ac->ac_o_ex;
+        h.result = ac->ac_b_ex;
+        h.flags = ac->ac_flags;
+        h.found = ac->ac_found;
+        h.groups = ac->ac_groups_scanned;
+        h.cr = ac->ac_criteria;
+        h.tail = ac->ac_tail;
+        h.buddy = ac->ac_buddy;
+        h.merged = 0;
+        if (ac->ac_op == EXT4_MB_HISTORY_ALLOC) {
+                if (ac->ac_g_ex.fe_start == ac->ac_b_ex.fe_start &&
+                                ac->ac_g_ex.fe_group == ac->ac_b_ex.fe_group)
+                        h.merged = 1;
+                h.goal = ac->ac_g_ex;
+                h.result = ac->ac_f_ex;
+        }
+
+        spin_lock(&sbi->s_mb_history_lock);
+        memcpy(sbi->s_mb_history + sbi->s_mb_history_cur, &h, sizeof(h));
+        if (++sbi->s_mb_history_cur >= sbi->s_mb_history_max)
+                sbi->s_mb_history_cur = 0;
+        spin_unlock(&sbi->s_mb_history_lock);
+}
+
+#else
+#define ext4_mb_history_release(sb)
+#define ext4_mb_history_init(sb)
+#endif
+
+static int ext4_mb_init_backend(struct super_block *sb)
+{
+        ext4_group_t i;
+        int j, len, metalen;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        int num_meta_group_infos =
+                (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) >>
+                        EXT4_DESC_PER_BLOCK_BITS(sb);
+        struct ext4_group_info **meta_group_info;
+
+        /* An 8TB filesystem with 64-bit pointers requires a 4096 byte
+         * kmalloc. A 128kb malloc should suffice for a 256TB filesystem.
+         * So a two level scheme suffices for now. */
+        sbi->s_group_info = kmalloc(sizeof(*sbi->s_group_info) *
+                                    num_meta_group_infos, GFP_KERNEL);
+        if (sbi->s_group_info == NULL) {
+                printk(KERN_ERR "EXT4-fs: can't allocate buddy meta group\n");
+                return -ENOMEM;
+        }
+        sbi->s_buddy_cache = new_inode(sb);
+        if (sbi->s_buddy_cache == NULL) {
+                printk(KERN_ERR "EXT4-fs: can't get new inode\n");
+                goto err_freesgi;
+        }
+        EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
+
+        metalen = sizeof(*meta_group_info) << EXT4_DESC_PER_BLOCK_BITS(sb);
+        for (i = 0; i < num_meta_group_infos; i++) {
+                if ((i + 1) == num_meta_group_infos)
+                        metalen = sizeof(*meta_group_info) *
+                                (sbi->s_groups_count -
+                                        (i << EXT4_DESC_PER_BLOCK_BITS(sb)));
+                meta_group_info = kmalloc(metalen, GFP_KERNEL);
+                if (meta_group_info == NULL) {
+                        printk(KERN_ERR "EXT4-fs: can't allocate mem for a "
+                               "buddy group\n");
+                        goto err_freemeta;
+                }
+                sbi->s_group_info[i] = meta_group_info;
+        }
+
+        /*
+         * calculate needed size. if change bb_counters size,
+         * don't forget about ext4_mb_generate_buddy()
+         */
+        len = sizeof(struct ext4_group_info);
+        len += sizeof(unsigned short) * (sb->s_blocksize_bits + 2);
+        for (i = 0; i < sbi->s_groups_count; i++) {
+                struct ext4_group_desc *desc;
+
+                meta_group_info =
+                        sbi->s_group_info[i >> EXT4_DESC_PER_BLOCK_BITS(sb)];
+                j = i & (EXT4_DESC_PER_BLOCK(sb) - 1);
+
+                meta_group_info[j] = kzalloc(len, GFP_KERNEL);
+                if (meta_group_info[j] == NULL) {
+                        printk(KERN_ERR "EXT4-fs: can't allocate buddy mem\n");
+                        i--;
+                        goto err_freebuddy;
+                }
+                desc = ext4_get_group_desc(sb, i, NULL);
+                if (desc == NULL) {
+                        printk(KERN_ERR
+                                "EXT4-fs: can't read descriptor %lu\n", i);
+                        goto err_freebuddy;
+                }
+                memset(meta_group_info[j], 0, len);
+                set_bit(EXT4_GROUP_INFO_NEED_INIT_BIT,
+                        &(meta_group_info[j]->bb_state));
+
+                /*
+                 * initialize bb_free to be able to skip
+                 * empty groups without initialization
+                 */
+                if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
+                        meta_group_info[j]->bb_free =
+                                ext4_free_blocks_after_init(sb, i, desc);
+                } else {
+                        meta_group_info[j]->bb_free =
+                                le16_to_cpu(desc->bg_free_blocks_count);
+                }
+
+                INIT_LIST_HEAD(&meta_group_info[j]->bb_prealloc_list);
+
+#ifdef DOUBLE_CHECK
+                {
+                        struct buffer_head *bh;
+                        meta_group_info[j]->bb_bitmap =
+                                kmalloc(sb->s_blocksize, GFP_KERNEL);
+                        BUG_ON(meta_group_info[j]->bb_bitmap == NULL);
+                        bh = read_block_bitmap(sb, i);
+                        BUG_ON(bh == NULL);
+                        memcpy(meta_group_info[j]->bb_bitmap, bh->b_data,
+                                        sb->s_blocksize);
+                        put_bh(bh);
+                }
+#endif
+
+        }
+
+        return 0;
+
+err_freebuddy:
+        while (i >= 0) {
+                kfree(ext4_get_group_info(sb, i));
+                i--;
+        }
+        i = num_meta_group_infos;
+err_freemeta:
+        while (--i >= 0)
+                kfree(sbi->s_group_info[i]);
+        iput(sbi->s_buddy_cache);
+err_freesgi:
+        kfree(sbi->s_group_info);
+        return -ENOMEM;
+}
+
+int ext4_mb_init(struct super_block *sb, int needs_recovery)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        unsigned i;
+        unsigned offset;
+        unsigned max;
+
+        if (!test_opt(sb, MBALLOC))
+                return 0;
+
+        i = (sb->s_blocksize_bits + 2) * sizeof(unsigned short);
+
+        sbi->s_mb_offsets = kmalloc(i, GFP_KERNEL);
+        if (sbi->s_mb_offsets == NULL) {
+                clear_opt(sbi->s_mount_opt, MBALLOC);
+                return -ENOMEM;
+        }
+        sbi->s_mb_maxs = kmalloc(i, GFP_KERNEL);
+        if (sbi->s_mb_maxs == NULL) {
+                clear_opt(sbi->s_mount_opt, MBALLOC);
+                kfree(sbi->s_mb_maxs);
+                return -ENOMEM;
+        }
+
+        /* order 0 is regular bitmap */
+        sbi->s_mb_maxs[0] = sb->s_blocksize << 3;
+        sbi->s_mb_offsets[0] = 0;
+
+        i = 1;
+        offset = 0;
+        max = sb->s_blocksize << 2;
+        do {
+                sbi->s_mb_offsets[i] = offset;
+                sbi->s_mb_maxs[i] = max;
+                offset += 1 << (sb->s_blocksize_bits - i);
+                max = max >> 1;
+                i++;
+        } while (i <= sb->s_blocksize_bits + 1);
+
+        /* init file for buddy data */
+        i = ext4_mb_init_backend(sb);
+        if (i) {
+                clear_opt(sbi->s_mount_opt, MBALLOC);
+                kfree(sbi->s_mb_offsets);
+                kfree(sbi->s_mb_maxs);
+                return i;
+        }
+
+        spin_lock_init(&sbi->s_md_lock);
+        INIT_LIST_HEAD(&sbi->s_active_transaction);
+        INIT_LIST_HEAD(&sbi->s_closed_transaction);
+        INIT_LIST_HEAD(&sbi->s_committed_transaction);
+        spin_lock_init(&sbi->s_bal_lock);
+
+        sbi->s_mb_max_to_scan = MB_DEFAULT_MAX_TO_SCAN;
+        sbi->s_mb_min_to_scan = MB_DEFAULT_MIN_TO_SCAN;
+        sbi->s_mb_stats = MB_DEFAULT_STATS;
+        sbi->s_mb_stream_request = MB_DEFAULT_STREAM_THRESHOLD;
+        sbi->s_mb_order2_reqs = MB_DEFAULT_ORDER2_REQS;
+        sbi->s_mb_history_filter = EXT4_MB_HISTORY_DEFAULT;
+        sbi->s_mb_group_prealloc = MB_DEFAULT_GROUP_PREALLOC;
+
+        i = sizeof(struct ext4_locality_group) * NR_CPUS;
+        sbi->s_locality_groups = kmalloc(i, GFP_KERNEL);
+        if (sbi->s_locality_groups == NULL) {
+                clear_opt(sbi->s_mount_opt, MBALLOC);
+                kfree(sbi->s_mb_offsets);
+                kfree(sbi->s_mb_maxs);
+                return -ENOMEM;
+        }
+        for (i = 0; i < NR_CPUS; i++) {
+                struct ext4_locality_group *lg;
+                lg = &sbi->s_locality_groups[i];
+                mutex_init(&lg->lg_mutex);
+                INIT_LIST_HEAD(&lg->lg_prealloc_list);
+                spin_lock_init(&lg->lg_prealloc_lock);
+        }
+
+        ext4_mb_init_per_dev_proc(sb);
+        ext4_mb_history_init(sb);
+
+        printk("EXT4-fs: mballoc enabled\n");
+        return 0;
+}
+
+/* need to called with ext4 group lock (ext4_lock_group) */
+static void ext4_mb_cleanup_pa(struct ext4_group_info *grp)
+{
+        struct ext4_prealloc_space *pa;
+        struct list_head *cur, *tmp;
+        int count = 0;
+
+        list_for_each_safe(cur, tmp, &grp->bb_prealloc_list) {
+                pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);
+                list_del(&pa->pa_group_list);
+                count++;
+                kfree(pa);
+        }
+        if (count)
+                mb_debug("mballoc: %u PAs left\n", count);
+
+}
+
+int ext4_mb_release(struct super_block *sb)
+{
+        ext4_group_t i;
+        int num_meta_group_infos;
+        struct ext4_group_info *grinfo;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+        if (!test_opt(sb, MBALLOC))
+                return 0;
+
+        /* release freed, non-committed blocks */
+        spin_lock(&sbi->s_md_lock);
+        list_splice_init(&sbi->s_closed_transaction,
+                        &sbi->s_committed_transaction);
+        list_splice_init(&sbi->s_active_transaction,
+                        &sbi->s_committed_transaction);
+        spin_unlock(&sbi->s_md_lock);
+        ext4_mb_free_committed_blocks(sb);
+
+        if (sbi->s_group_info) {
+                for (i = 0; i < sbi->s_groups_count; i++) {
+                        grinfo = ext4_get_group_info(sb, i);
+#ifdef DOUBLE_CHECK
+                        kfree(grinfo->bb_bitmap);
+#endif
+                        ext4_lock_group(sb, i);
+                        ext4_mb_cleanup_pa(grinfo);
+                        ext4_unlock_group(sb, i);
+                        kfree(grinfo);
+                }
+                num_meta_group_infos = (sbi->s_groups_count +
+                                EXT4_DESC_PER_BLOCK(sb) - 1) >>
+                        EXT4_DESC_PER_BLOCK_BITS(sb);
+                for (i = 0; i < num_meta_group_infos; i++)
+                        kfree(sbi->s_group_info[i]);
+                kfree(sbi->s_group_info);
+        }
+        kfree(sbi->s_mb_offsets);
+        kfree(sbi->s_mb_maxs);
+        if (sbi->s_buddy_cache)
+                iput(sbi->s_buddy_cache);
+        if (sbi->s_mb_stats) {
+                printk(KERN_INFO
+                       "EXT4-fs: mballoc: %u blocks %u reqs (%u success)\n",
+                                atomic_read(&sbi->s_bal_allocated),
+                                atomic_read(&sbi->s_bal_reqs),
+                                atomic_read(&sbi->s_bal_success));
+                printk(KERN_INFO
+                      "EXT4-fs: mballoc: %u extents scanned, %u goal hits, "
+                                "%u 2^N hits, %u breaks, %u lost\n",
+                                atomic_read(&sbi->s_bal_ex_scanned),
+                                atomic_read(&sbi->s_bal_goals),
+                                atomic_read(&sbi->s_bal_2orders),
+                                atomic_read(&sbi->s_bal_breaks),
+                                atomic_read(&sbi->s_mb_lost_chunks));
+                printk(KERN_INFO
+                       "EXT4-fs: mballoc: %lu generated and it took %Lu\n",
+                                sbi->s_mb_buddies_generated++,
+                                sbi->s_mb_generation_time);
+                printk(KERN_INFO
+                       "EXT4-fs: mballoc: %u preallocated, %u discarded\n",
+                                atomic_read(&sbi->s_mb_preallocated),
+                                atomic_read(&sbi->s_mb_discarded));
+        }
+
+        kfree(sbi->s_locality_groups);
+
+        ext4_mb_history_release(sb);
+        ext4_mb_destroy_per_dev_proc(sb);
+
+        return 0;
+}
+
+static void ext4_mb_free_committed_blocks(struct super_block *sb)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        int err;
+        int i;
+        int count = 0;
+        int count2 = 0;
+        struct ext4_free_metadata *md;
+        struct ext4_buddy e4b;
+
+        if (list_empty(&sbi->s_committed_transaction))
+                return;
+
+        /* there is committed blocks to be freed yet */
+        do {
+                /* get next array of blocks */
+                md = NULL;
+                spin_lock(&sbi->s_md_lock);
+                if (!list_empty(&sbi->s_committed_transaction)) {
+                        md = list_entry(sbi->s_committed_transaction.next,
+                                        struct ext4_free_metadata, list);
+                        list_del(&md->list);
+                }
+                spin_unlock(&sbi->s_md_lock);
+
+                if (md == NULL)
+                        break;
+
+                mb_debug("gonna free %u blocks in group %lu (0x%p):",
+                                md->num, md->group, md);
+
+                err = ext4_mb_load_buddy(sb, md->group, &e4b);
+                /* we expect to find existing buddy because it's pinned */
+                BUG_ON(err != 0);
+
+                /* there are blocks to put in buddy to make them really free */
+                count += md->num;
+                count2++;
+                ext4_lock_group(sb, md->group);
+                for (i = 0; i < md->num; i++) {
+                        mb_debug(" %u", md->blocks[i]);
+                        err = mb_free_blocks(NULL, &e4b, md->blocks[i], 1);
+                        BUG_ON(err != 0);
+                }
+                mb_debug("\n");
+                ext4_unlock_group(sb, md->group);
+
+                /* balance refcounts from ext4_mb_free_metadata() */
+                page_cache_release(e4b.bd_buddy_page);
+                page_cache_release(e4b.bd_bitmap_page);
+
+                kfree(md);
+                ext4_mb_release_desc(&e4b);
+
+        } while (md);
+
+        mb_debug("freed %u blocks in %u structures\n", count, count2);
+}
+
+#define EXT4_ROOT                       "ext4"
+#define EXT4_MB_STATS_NAME              "stats"
+#define EXT4_MB_MAX_TO_SCAN_NAME        "max_to_scan"
+#define EXT4_MB_MIN_TO_SCAN_NAME        "min_to_scan"
+#define EXT4_MB_ORDER2_REQ              "order2_req"
+#define EXT4_MB_STREAM_REQ              "stream_req"
+#define EXT4_MB_GROUP_PREALLOC          "group_prealloc"
+
+
+
+#define MB_PROC_VALUE_READ(name)                                \
+static int ext4_mb_read_##name(char *page, char **start,        \
+                off_t off, int count, int *eof, void *data)     \
+{                                                               \
+        struct ext4_sb_info *sbi = data;                        \
+        int len;                                                \
+        *eof = 1;                                               \
+        if (off != 0)                                           \
+                return 0;                                       \
+        len = sprintf(page, "%ld\n", sbi->s_mb_##name);         \
+        *start = page;                                          \
+        return len;                                             \
+}
+
+#define MB_PROC_VALUE_WRITE(name)                               \
+static int ext4_mb_write_##name(struct file *file,              \
+                const char __user *buf, unsigned long cnt, void *data)  \
+{                                                               \
+        struct ext4_sb_info *sbi = data;                        \
+        char str[32];                                           \
+        long value;                                             \
+        if (cnt >= sizeof(str))                                 \
+                return -EINVAL;                                 \
+        if (copy_from_user(str, buf, cnt))                      \
+                return -EFAULT;                                 \
+        value = simple_strtol(str, NULL, 0);                    \
+        if (value <= 0)                                         \
+                return -ERANGE;                                 \
+        sbi->s_mb_##name = value;                               \
+        return cnt;                                             \
+}
+
+MB_PROC_VALUE_READ(stats);
+MB_PROC_VALUE_WRITE(stats);
+MB_PROC_VALUE_READ(max_to_scan);
+MB_PROC_VALUE_WRITE(max_to_scan);
+MB_PROC_VALUE_READ(min_to_scan);
+MB_PROC_VALUE_WRITE(min_to_scan);
+MB_PROC_VALUE_READ(order2_reqs);
+MB_PROC_VALUE_WRITE(order2_reqs);
+MB_PROC_VALUE_READ(stream_request);
+MB_PROC_VALUE_WRITE(stream_request);
+MB_PROC_VALUE_READ(group_prealloc);
+MB_PROC_VALUE_WRITE(group_prealloc);
+
+#define MB_PROC_HANDLER(name, var)                                      \
+do {                                                                    \
+        proc = create_proc_entry(name, mode, sbi->s_mb_proc);           \
+        if (proc == NULL) {                                             \
+                printk(KERN_ERR "EXT4-fs: can't to create %s\n", name); \
+                goto err_out;                                           \
+        }                                                               \
+        proc->data = sbi;                                               \
+        proc->read_proc  = ext4_mb_read_##var ;                         \
+        proc->write_proc = ext4_mb_write_##var;                         \
+} while (0)
+
+static int ext4_mb_init_per_dev_proc(struct super_block *sb)
+{
+        mode_t mode = S_IFREG | S_IRUGO | S_IWUSR;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        struct proc_dir_entry *proc;
+        char devname[64];
+
+        snprintf(devname, sizeof(devname) - 1, "%s",
+                bdevname(sb->s_bdev, devname));
+        sbi->s_mb_proc = proc_mkdir(devname, proc_root_ext4);
+
+        MB_PROC_HANDLER(EXT4_MB_STATS_NAME, stats);
+        MB_PROC_HANDLER(EXT4_MB_MAX_TO_SCAN_NAME, max_to_scan);
+        MB_PROC_HANDLER(EXT4_MB_MIN_TO_SCAN_NAME, min_to_scan);
+        MB_PROC_HANDLER(EXT4_MB_ORDER2_REQ, order2_reqs);
+        MB_PROC_HANDLER(EXT4_MB_STREAM_REQ, stream_request);
+        MB_PROC_HANDLER(EXT4_MB_GROUP_PREALLOC, group_prealloc);
+
+        return 0;
+
+err_out:
+        printk(KERN_ERR "EXT4-fs: Unable to create %s\n", devname);
+        remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_mb_proc);
+        remove_proc_entry(devname, proc_root_ext4);
+        sbi->s_mb_proc = NULL;
+
+        return -ENOMEM;
+}
+
+static int ext4_mb_destroy_per_dev_proc(struct super_block *sb)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        char devname[64];
+
+        if (sbi->s_mb_proc == NULL)
+                return -EINVAL;
+
+        snprintf(devname, sizeof(devname) - 1, "%s",
+                bdevname(sb->s_bdev, devname));
+        remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_mb_proc);
+        remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_mb_proc);
+        remove_proc_entry(devname, proc_root_ext4);
+
+        return 0;
+}
+
+int __init init_ext4_mballoc(void)
+{
+        ext4_pspace_cachep =
+                kmem_cache_create("ext4_prealloc_space",
+                                     sizeof(struct ext4_prealloc_space),
+                                     0, SLAB_RECLAIM_ACCOUNT, NULL);
+        if (ext4_pspace_cachep == NULL)
+                return -ENOMEM;
+
+#ifdef CONFIG_PROC_FS
+        proc_root_ext4 = proc_mkdir(EXT4_ROOT, proc_root_fs);
+        if (proc_root_ext4 == NULL)
+                printk(KERN_ERR "EXT4-fs: Unable to create %s\n", EXT4_ROOT);
+#endif
+
+        return 0;
+}
+
+void exit_ext4_mballoc(void)
+{
+        /* XXX: synchronize_rcu(); */
+        kmem_cache_destroy(ext4_pspace_cachep);
+#ifdef CONFIG_PROC_FS
+        remove_proc_entry(EXT4_ROOT, proc_root_fs);
+#endif
+}
+
+
+/*
+ * Check quota and mark choosed space (ac->ac_b_ex) non-free in bitmaps
+ * Returns 0 if success or error code
+ */
+static int ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
+                                handle_t *handle)
+{
+        struct buffer_head *bitmap_bh = NULL;
+        struct ext4_super_block *es;
+        struct ext4_group_desc *gdp;
+        struct buffer_head *gdp_bh;
+        struct ext4_sb_info *sbi;
+        struct super_block *sb;
+        ext4_fsblk_t block;
+        int err;
+
+        BUG_ON(ac->ac_status != AC_STATUS_FOUND);
+        BUG_ON(ac->ac_b_ex.fe_len <= 0);
+
+        sb = ac->ac_sb;
+        sbi = EXT4_SB(sb);
+        es = sbi->s_es;
+
+        ext4_debug("using block group %lu(%d)\n", ac->ac_b_ex.fe_group,
+                        gdp->bg_free_blocks_count);
+
+        err = -EIO;
+        bitmap_bh = read_block_bitmap(sb, ac->ac_b_ex.fe_group);
+        if (!bitmap_bh)
+                goto out_err;
+
+        err = ext4_journal_get_write_access(handle, bitmap_bh);
+        if (err)
+                goto out_err;
+
+        err = -EIO;
+        gdp = ext4_get_group_desc(sb, ac->ac_b_ex.fe_group, &gdp_bh);
+        if (!gdp)
+                goto out_err;
+
+        err = ext4_journal_get_write_access(handle, gdp_bh);
+        if (err)
+                goto out_err;
+
+        block = ac->ac_b_ex.fe_group * EXT4_BLOCKS_PER_GROUP(sb)
+                + ac->ac_b_ex.fe_start
+                + le32_to_cpu(es->s_first_data_block);
+
+        if (block == ext4_block_bitmap(sb, gdp) ||
+                        block == ext4_inode_bitmap(sb, gdp) ||
+                        in_range(block, ext4_inode_table(sb, gdp),
+                                EXT4_SB(sb)->s_itb_per_group)) {
+
+                ext4_error(sb, __FUNCTION__,
+                           "Allocating block in system zone - block = %llu",
+                           block);
+        }
+#ifdef AGGRESSIVE_CHECK
+        {
+                int i;
+                for (i = 0; i < ac->ac_b_ex.fe_len; i++) {
+                        BUG_ON(mb_test_bit(ac->ac_b_ex.fe_start + i,
+                                                bitmap_bh->b_data));
+                }
+        }
+#endif
+        mb_set_bits(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group), bitmap_bh->b_data,
+                                ac->ac_b_ex.fe_start, ac->ac_b_ex.fe_len);
+
+        spin_lock(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group));
+        if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
+                gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
+                gdp->bg_free_blocks_count =
+                        cpu_to_le16(ext4_free_blocks_after_init(sb,
+                                                ac->ac_b_ex.fe_group,
+                                                gdp));
+        }
+        gdp->bg_free_blocks_count =
+                cpu_to_le16(le16_to_cpu(gdp->bg_free_blocks_count)
+                                - ac->ac_b_ex.fe_len);
+        gdp->bg_checksum = ext4_group_desc_csum(sbi, ac->ac_b_ex.fe_group, gdp);
+        spin_unlock(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group));
+        percpu_counter_sub(&sbi->s_freeblocks_counter, ac->ac_b_ex.fe_len);
+
+        err = ext4_journal_dirty_metadata(handle, bitmap_bh);
+        if (err)
+                goto out_err;
+        err = ext4_journal_dirty_metadata(handle, gdp_bh);
+
+out_err:
+        sb->s_dirt = 1;
+        put_bh(bitmap_bh);
+        return err;
+}
+
+/*
+ * here we normalize request for locality group
+ * Group request are normalized to s_strip size if we set the same via mount
+ * option. If not we set it to s_mb_group_prealloc which can be configured via
+ * /proc/fs/ext4/<partition>/group_prealloc
+ *
+ * XXX: should we try to preallocate more than the group has now?
+ */
+static void ext4_mb_normalize_group_request(struct ext4_allocation_context *ac)
+{
+        struct super_block *sb = ac->ac_sb;
+        struct ext4_locality_group *lg = ac->ac_lg;
+
+        BUG_ON(lg == NULL);
+        if (EXT4_SB(sb)->s_stripe)
+                ac->ac_g_ex.fe_len = EXT4_SB(sb)->s_stripe;
+        else
+                ac->ac_g_ex.fe_len = EXT4_SB(sb)->s_mb_group_prealloc;
+        mb_debug("#%u: goal %lu blocks for locality group\n",
+                current->pid, ac->ac_g_ex.fe_len);
+}
+
+/*
+ * Normalization means making request better in terms of
+ * size and alignment
+ */
+static void ext4_mb_normalize_request(struct ext4_allocation_context *ac,
+                                struct ext4_allocation_request *ar)
+{
+        int bsbits, max;
+        ext4_lblk_t end;
+        struct list_head *cur;
+        loff_t size, orig_size, start_off;
+        ext4_lblk_t start, orig_start;
+        struct ext4_inode_info *ei = EXT4_I(ac->ac_inode);
+
+        /* do normalize only data requests, metadata requests
+           do not need preallocation */
+        if (!(ac->ac_flags & EXT4_MB_HINT_DATA))
+                return;
+
+        /* sometime caller may want exact blocks */
+        if (unlikely(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY))
+                return;
+
+        /* caller may indicate that preallocation isn't
+         * required (it's a tail, for example) */
+        if (ac->ac_flags & EXT4_MB_HINT_NOPREALLOC)
+                return;
+
+        if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC) {
+                ext4_mb_normalize_group_request(ac);
+                return ;
+        }
+
+        bsbits = ac->ac_sb->s_blocksize_bits;
+
+        /* first, let's learn actual file size
+         * given current request is allocated */
+        size = ac->ac_o_ex.fe_logical + ac->ac_o_ex.fe_len;
+        size = size << bsbits;
+        if (size < i_size_read(ac->ac_inode))
+                size = i_size_read(ac->ac_inode);
+
+        /* max available blocks in a free group */
+        max = EXT4_BLOCKS_PER_GROUP(ac->ac_sb) - 1 - 1 -
+                                EXT4_SB(ac->ac_sb)->s_itb_per_group;
+
+#define NRL_CHECK_SIZE(req, size, max,bits)     \
+                (req <= (size) || max <= ((size) >> bits))
+
+        /* first, try to predict filesize */
+        /* XXX: should this table be tunable? */
+        start_off = 0;
+        if (size <= 16 * 1024) {
+                size = 16 * 1024;
+        } else if (size <= 32 * 1024) {
+                size = 32 * 1024;
+        } else if (size <= 64 * 1024) {
+                size = 64 * 1024;
+        } else if (size <= 128 * 1024) {
+                size = 128 * 1024;
+        } else if (size <= 256 * 1024) {
+                size = 256 * 1024;
+        } else if (size <= 512 * 1024) {
+                size = 512 * 1024;
+        } else if (size <= 1024 * 1024) {
+                size = 1024 * 1024;
+        } else if (NRL_CHECK_SIZE(size, 4 * 1024 * 1024, max, bsbits)) {
+                start_off = ((loff_t)ac->ac_o_ex.fe_logical >>
+                                                (20 - bsbits)) << 20;
+                size = 1024 * 1024;
+        } else if (NRL_CHECK_SIZE(size, 8 * 1024 * 1024, max, bsbits)) {
+                start_off = ((loff_t)ac->ac_o_ex.fe_logical >>
+                                                        (22 - bsbits)) << 22;
+                size = 4 * 1024 * 1024;
+        } else if (NRL_CHECK_SIZE(ac->ac_o_ex.fe_len,
+                                        (8<<20)>>bsbits, max, bsbits)) {
+                start_off = ((loff_t)ac->ac_o_ex.fe_logical >>
+                                                        (23 - bsbits)) << 23;
+                size = 8 * 1024 * 1024;
+        } else {
+                start_off = (loff_t)ac->ac_o_ex.fe_logical << bsbits;
+                size      = ac->ac_o_ex.fe_len << bsbits;
+        }
+        orig_size = size = size >> bsbits;
+        orig_start = start = start_off >> bsbits;
+
+        /* don't cover already allocated blocks in selected range */
+        if (ar->pleft && start <= ar->lleft) {
+                size -= ar->lleft + 1 - start;
+                start = ar->lleft + 1;
+        }
+        if (ar->pright && start + size - 1 >= ar->lright)
+                size -= start + size - ar->lright;
+
+        end = start + size;
+
+        /* check we don't cross already preallocated blocks */
+        rcu_read_lock();
+        list_for_each_rcu(cur, &ei->i_prealloc_list) {
+                struct ext4_prealloc_space *pa;
+                unsigned long pa_end;
+
+                pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list);
+
+                if (pa->pa_deleted)
+                        continue;
+                spin_lock(&pa->pa_lock);
+                if (pa->pa_deleted) {
+                        spin_unlock(&pa->pa_lock);
+                        continue;
+                }
+
+                pa_end = pa->pa_lstart + pa->pa_len;
+
+                /* PA must not overlap original request */
+                BUG_ON(!(ac->ac_o_ex.fe_logical >= pa_end ||
+                        ac->ac_o_ex.fe_logical < pa->pa_lstart));
+
+                /* skip PA normalized request doesn't overlap with */
+                if (pa->pa_lstart >= end) {
+                        spin_unlock(&pa->pa_lock);
+                        continue;
+                }
+                if (pa_end <= start) {
+                        spin_unlock(&pa->pa_lock);
+                        continue;
+                }
+                BUG_ON(pa->pa_lstart <= start && pa_end >= end);
+
+                if (pa_end <= ac->ac_o_ex.fe_logical) {
+                        BUG_ON(pa_end < start);
+                        start = pa_end;
+                }
+
+                if (pa->pa_lstart > ac->ac_o_ex.fe_logical) {
+                        BUG_ON(pa->pa_lstart > end);
+                        end = pa->pa_lstart;
+                }
+                spin_unlock(&pa->pa_lock);
+        }
+        rcu_read_unlock();
+        size = end - start;
+
+        /* XXX: extra loop to check we really don't overlap preallocations */
+        rcu_read_lock();
+        list_for_each_rcu(cur, &ei->i_prealloc_list) {
+                struct ext4_prealloc_space *pa;
+                unsigned long pa_end;
+                pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list);
+                spin_lock(&pa->pa_lock);
+                if (pa->pa_deleted == 0) {
+                        pa_end = pa->pa_lstart + pa->pa_len;
+                        BUG_ON(!(start >= pa_end || end <= pa->pa_lstart));
+                }
+                spin_unlock(&pa->pa_lock);
+        }
+        rcu_read_unlock();
+
+        if (start + size <= ac->ac_o_ex.fe_logical &&
+                        start > ac->ac_o_ex.fe_logical) {
+                printk(KERN_ERR "start %lu, size %lu, fe_logical %lu\n",
+                        (unsigned long) start, (unsigned long) size,
+                        (unsigned long) ac->ac_o_ex.fe_logical);
+        }
+        BUG_ON(start + size <= ac->ac_o_ex.fe_logical &&
+                        start > ac->ac_o_ex.fe_logical);
+        BUG_ON(size <= 0 || size >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
+
+        /* now prepare goal request */
+
+        /* XXX: is it better to align blocks WRT to logical
+         * placement or satisfy big request as is */
+        ac->ac_g_ex.fe_logical = start;
+        ac->ac_g_ex.fe_len = size;
+
+        /* define goal start in order to merge */
+        if (ar->pright && (ar->lright == (start + size))) {
+                /* merge to the right */
+                ext4_get_group_no_and_offset(ac->ac_sb, ar->pright - size,
+                                                &ac->ac_f_ex.fe_group,
+                                                &ac->ac_f_ex.fe_start);
+                ac->ac_flags |= EXT4_MB_HINT_TRY_GOAL;
+        }
+        if (ar->pleft && (ar->lleft + 1 == start)) {
+                /* merge to the left */
+                ext4_get_group_no_and_offset(ac->ac_sb, ar->pleft + 1,
+                                                &ac->ac_f_ex.fe_group,
+                                                &ac->ac_f_ex.fe_start);
+                ac->ac_flags |= EXT4_MB_HINT_TRY_GOAL;
+        }
+
+        mb_debug("goal: %u(was %u) blocks at %u\n", (unsigned) size,
+                (unsigned) orig_size, (unsigned) start);
+}
+
+static void ext4_mb_collect_stats(struct ext4_allocation_context *ac)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+
+        if (sbi->s_mb_stats && ac->ac_g_ex.fe_len > 1) {
+                atomic_inc(&sbi->s_bal_reqs);
+                atomic_add(ac->ac_b_ex.fe_len, &sbi->s_bal_allocated);
+                if (ac->ac_o_ex.fe_len >= ac->ac_g_ex.fe_len)
+                        atomic_inc(&sbi->s_bal_success);
+                atomic_add(ac->ac_found, &sbi->s_bal_ex_scanned);
+                if (ac->ac_g_ex.fe_start == ac->ac_b_ex.fe_start &&
+                                ac->ac_g_ex.fe_group == ac->ac_b_ex.fe_group)
+                        atomic_inc(&sbi->s_bal_goals);
+                if (ac->ac_found > sbi->s_mb_max_to_scan)
+                        atomic_inc(&sbi->s_bal_breaks);
+        }
+
+        ext4_mb_store_history(ac);
+}
+
+/*
+ * use blocks preallocated to inode
+ */
+static void ext4_mb_use_inode_pa(struct ext4_allocation_context *ac,
+                                struct ext4_prealloc_space *pa)
+{
+        ext4_fsblk_t start;
+        ext4_fsblk_t end;
+        int len;
+
+        /* found preallocated blocks, use them */
+        start = pa->pa_pstart + (ac->ac_o_ex.fe_logical - pa->pa_lstart);
+        end = min(pa->pa_pstart + pa->pa_len, start + ac->ac_o_ex.fe_len);
+        len = end - start;
+        ext4_get_group_no_and_offset(ac->ac_sb, start, &ac->ac_b_ex.fe_group,
+                                        &ac->ac_b_ex.fe_start);
+        ac->ac_b_ex.fe_len = len;
+        ac->ac_status = AC_STATUS_FOUND;
+        ac->ac_pa = pa;
+
+        BUG_ON(start < pa->pa_pstart);
+        BUG_ON(start + len > pa->pa_pstart + pa->pa_len);
+        BUG_ON(pa->pa_free < len);
+        pa->pa_free -= len;
+
+        mb_debug("use %llu/%lu from inode pa %p\n", start, len, pa);
+}
+
+/*
+ * use blocks preallocated to locality group
+ */
+static void ext4_mb_use_group_pa(struct ext4_allocation_context *ac,
+                                struct ext4_prealloc_space *pa)
+{
+        unsigned len = ac->ac_o_ex.fe_len;
+
+        ext4_get_group_no_and_offset(ac->ac_sb, pa->pa_pstart,
+                                        &ac->ac_b_ex.fe_group,
+                                        &ac->ac_b_ex.fe_start);
+        ac->ac_b_ex.fe_len = len;
+        ac->ac_status = AC_STATUS_FOUND;
+        ac->ac_pa = pa;
+
+        /* we don't correct pa_pstart or pa_plen here to avoid
+         * possible race when tte group is being loaded concurrently
+         * instead we correct pa later, after blocks are marked
+         * in on-disk bitmap -- see ext4_mb_release_context() */
+        /*
+         * FIXME!! but the other CPUs can look at this particular
+         * pa and think that it have enought free blocks if we
+         * don't update pa_free here right ?
+         */
+        mb_debug("use %u/%u from group pa %p\n", pa->pa_lstart-len, len, pa);
+}
+
+/*
+ * search goal blocks in preallocated space
+ */
+static int ext4_mb_use_preallocated(struct ext4_allocation_context *ac)
+{
+        struct ext4_inode_info *ei = EXT4_I(ac->ac_inode);
+        struct ext4_locality_group *lg;
+        struct ext4_prealloc_space *pa;
+        struct list_head *cur;
+
+        /* only data can be preallocated */
+        if (!(ac->ac_flags & EXT4_MB_HINT_DATA))
+                return 0;
+
+        /* first, try per-file preallocation */
+        rcu_read_lock();
+        list_for_each_rcu(cur, &ei->i_prealloc_list) {
+                pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list);
+
+                /* all fields in this condition don't change,
+                 * so we can skip locking for them */
+                if (ac->ac_o_ex.fe_logical < pa->pa_lstart ||
+                        ac->ac_o_ex.fe_logical >= pa->pa_lstart + pa->pa_len)
+                        continue;
+
+                /* found preallocated blocks, use them */
+                spin_lock(&pa->pa_lock);
+                if (pa->pa_deleted == 0 && pa->pa_free) {
+                        atomic_inc(&pa->pa_count);
+                        ext4_mb_use_inode_pa(ac, pa);
+                        spin_unlock(&pa->pa_lock);
+                        ac->ac_criteria = 10;
+                        rcu_read_unlock();
+                        return 1;
+                }
+                spin_unlock(&pa->pa_lock);
+        }
+        rcu_read_unlock();
+
+        /* can we use group allocation? */
+        if (!(ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC))
+                return 0;
+
+        /* inode may have no locality group for some reason */
+        lg = ac->ac_lg;
+        if (lg == NULL)
+                return 0;
+
+        rcu_read_lock();
+        list_for_each_rcu(cur, &lg->lg_prealloc_list) {
+                pa = list_entry(cur, struct ext4_prealloc_space, pa_inode_list);
+                spin_lock(&pa->pa_lock);
+                if (pa->pa_deleted == 0 && pa->pa_free >= ac->ac_o_ex.fe_len) {
+                        atomic_inc(&pa->pa_count);
+                        ext4_mb_use_group_pa(ac, pa);
+                        spin_unlock(&pa->pa_lock);
+                        ac->ac_criteria = 20;
+                        rcu_read_unlock();
+                        return 1;
+                }
+                spin_unlock(&pa->pa_lock);
+        }
+        rcu_read_unlock();
+
+        return 0;
+}
+
+/*
+ * the function goes through all preallocation in this group and marks them
+ * used in in-core bitmap. buddy must be generated from this bitmap
+ * Need to be called with ext4 group lock (ext4_lock_group)
+ */
+static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
+                                        ext4_group_t group)
+{
+        struct ext4_group_info *grp = ext4_get_group_info(sb, group);
+        struct ext4_prealloc_space *pa;
+        struct list_head *cur;
+        ext4_group_t groupnr;
+        ext4_grpblk_t start;
+        int preallocated = 0;
+        int count = 0;
+        int len;
+
+        /* all form of preallocation discards first load group,
+         * so the only competing code is preallocation use.
+         * we don't need any locking here
+         * notice we do NOT ignore preallocations with pa_deleted
+         * otherwise we could leave used blocks available for
+         * allocation in buddy when concurrent ext4_mb_put_pa()
+         * is dropping preallocation
+         */
+        list_for_each(cur, &grp->bb_prealloc_list) {
+                pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);
+                spin_lock(&pa->pa_lock);
+                ext4_get_group_no_and_offset(sb, pa->pa_pstart,
+                                             &groupnr, &start);
+                len = pa->pa_len;
+                spin_unlock(&pa->pa_lock);
+                if (unlikely(len == 0))
+                        continue;
+                BUG_ON(groupnr != group);
+                mb_set_bits(sb_bgl_lock(EXT4_SB(sb), group),
+                                                bitmap, start, len);
+                preallocated += len;
+                count++;
+        }
+        mb_debug("prellocated %u for group %lu\n", preallocated, group);
+}
+
+static void ext4_mb_pa_callback(struct rcu_head *head)
+{
+        struct ext4_prealloc_space *pa;
+        pa = container_of(head, struct ext4_prealloc_space, u.pa_rcu);
+        kmem_cache_free(ext4_pspace_cachep, pa);
+}
+
+/*
+ * drops a reference to preallocated space descriptor
+ * if this was the last reference and the space is consumed
+ */
+static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
+                        struct super_block *sb, struct ext4_prealloc_space *pa)
+{
+        unsigned long grp;
+
+        if (!atomic_dec_and_test(&pa->pa_count) || pa->pa_free != 0)
+                return;
+
+        /* in this short window concurrent discard can set pa_deleted */
+        spin_lock(&pa->pa_lock);
+        if (pa->pa_deleted == 1) {
+                spin_unlock(&pa->pa_lock);
+                return;
+        }
+
+        pa->pa_deleted = 1;
+        spin_unlock(&pa->pa_lock);
+
+        /* -1 is to protect from crossing allocation group */
+        ext4_get_group_no_and_offset(sb, pa->pa_pstart - 1, &grp, NULL);
+
+        /*
+         * possible race:
+         *
+         *  P1 (buddy init)                     P2 (regular allocation)
+         *                                      find block B in PA
+         *  copy on-disk bitmap to buddy
+         *                                      mark B in on-disk bitmap
+         *                                      drop PA from group
+         *  mark all PAs in buddy
+         *
+         * thus, P1 initializes buddy with B available. to prevent this
+         * we make "copy" and "mark all PAs" atomic and serialize "drop PA"
+         * against that pair
+         */
+        ext4_lock_group(sb, grp);
+        list_del(&pa->pa_group_list);
+        ext4_unlock_group(sb, grp);
+
+        spin_lock(pa->pa_obj_lock);
+        list_del_rcu(&pa->pa_inode_list);
+        spin_unlock(pa->pa_obj_lock);
+
+        call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);
+}
+
+/*
+ * creates new preallocated space for given inode
+ */
+static int ext4_mb_new_inode_pa(struct ext4_allocation_context *ac)
+{
+        struct super_block *sb = ac->ac_sb;
+        struct ext4_prealloc_space *pa;
+        struct ext4_group_info *grp;
+        struct ext4_inode_info *ei;
+
+        /* preallocate only when found space is larger then requested */
+        BUG_ON(ac->ac_o_ex.fe_len >= ac->ac_b_ex.fe_len);
+        BUG_ON(ac->ac_status != AC_STATUS_FOUND);
+        BUG_ON(!S_ISREG(ac->ac_inode->i_mode));
+
+        pa = kmem_cache_alloc(ext4_pspace_cachep, GFP_NOFS);
+        if (pa == NULL)
+                return -ENOMEM;
+
+        if (ac->ac_b_ex.fe_len < ac->ac_g_ex.fe_len) {
+                int winl;
+                int wins;
+                int win;
+                int offs;
+
+                /* we can't allocate as much as normalizer wants.
+                 * so, found space must get proper lstart
+                 * to cover original request */
+                BUG_ON(ac->ac_g_ex.fe_logical > ac->ac_o_ex.fe_logical);
+                BUG_ON(ac->ac_g_ex.fe_len < ac->ac_o_ex.fe_len);
+
+                /* we're limited by original request in that
+                 * logical block must be covered any way
+                 * winl is window we can move our chunk within */
+                winl = ac->ac_o_ex.fe_logical - ac->ac_g_ex.fe_logical;
+
+                /* also, we should cover whole original request */
+                wins = ac->ac_b_ex.fe_len - ac->ac_o_ex.fe_len;
+
+                /* the smallest one defines real window */
+                win = min(winl, wins);
+
+                offs = ac->ac_o_ex.fe_logical % ac->ac_b_ex.fe_len;
+                if (offs && offs < win)
+                        win = offs;
+
+                ac->ac_b_ex.fe_logical = ac->ac_o_ex.fe_logical - win;
+                BUG_ON(ac->ac_o_ex.fe_logical < ac->ac_b_ex.fe_logical);
+                BUG_ON(ac->ac_o_ex.fe_len > ac->ac_b_ex.fe_len);
+        }
+
+        /* preallocation can change ac_b_ex, thus we store actually
+         * allocated blocks for history */
+        ac->ac_f_ex = ac->ac_b_ex;
+
+        pa->pa_lstart = ac->ac_b_ex.fe_logical;
+        pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
+        pa->pa_len = ac->ac_b_ex.fe_len;
+        pa->pa_free = pa->pa_len;
+        atomic_set(&pa->pa_count, 1);
+        spin_lock_init(&pa->pa_lock);
+        pa->pa_deleted = 0;
+        pa->pa_linear = 0;
+
+        mb_debug("new inode pa %p: %llu/%u for %u\n", pa,
+                        pa->pa_pstart, pa->pa_len, pa->pa_lstart);
+
+        ext4_mb_use_inode_pa(ac, pa);
+        atomic_add(pa->pa_free, &EXT4_SB(sb)->s_mb_preallocated);
+
+        ei = EXT4_I(ac->ac_inode);
+        grp = ext4_get_group_info(sb, ac->ac_b_ex.fe_group);
+
+        pa->pa_obj_lock = &ei->i_prealloc_lock;
+        pa->pa_inode = ac->ac_inode;
+
+        ext4_lock_group(sb, ac->ac_b_ex.fe_group);
+        list_add(&pa->pa_group_list, &grp->bb_prealloc_list);
+        ext4_unlock_group(sb, ac->ac_b_ex.fe_group);
+
+        spin_lock(pa->pa_obj_lock);
+        list_add_rcu(&pa->pa_inode_list, &ei->i_prealloc_list);
+        spin_unlock(pa->pa_obj_lock);
+
+        return 0;
+}
+
+/*
+ * creates new preallocated space for locality group inodes belongs to
+ */
+static int ext4_mb_new_group_pa(struct ext4_allocation_context *ac)
+{
+        struct super_block *sb = ac->ac_sb;
+        struct ext4_locality_group *lg;
+        struct ext4_prealloc_space *pa;
+        struct ext4_group_info *grp;
+
+        /* preallocate only when found space is larger then requested */
+        BUG_ON(ac->ac_o_ex.fe_len >= ac->ac_b_ex.fe_len);
+        BUG_ON(ac->ac_status != AC_STATUS_FOUND);
+        BUG_ON(!S_ISREG(ac->ac_inode->i_mode));
+
+        BUG_ON(ext4_pspace_cachep == NULL);
+        pa = kmem_cache_alloc(ext4_pspace_cachep, GFP_NOFS);
+        if (pa == NULL)
+                return -ENOMEM;
+
+        /* preallocation can change ac_b_ex, thus we store actually
+         * allocated blocks for history */
+        ac->ac_f_ex = ac->ac_b_ex;
+
+        pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
+        pa->pa_lstart = pa->pa_pstart;
+        pa->pa_len = ac->ac_b_ex.fe_len;
+        pa->pa_free = pa->pa_len;
+        atomic_set(&pa->pa_count, 1);
+        spin_lock_init(&pa->pa_lock);
+        pa->pa_deleted = 0;
+        pa->pa_linear = 1;
+
+        mb_debug("new group pa %p: %llu/%u for %u\n", pa,
+                        pa->pa_pstart, pa->pa_len, pa->pa_lstart);
+
+        ext4_mb_use_group_pa(ac, pa);
+        atomic_add(pa->pa_free, &EXT4_SB(sb)->s_mb_preallocated);
+
+        grp = ext4_get_group_info(sb, ac->ac_b_ex.fe_group);
+        lg = ac->ac_lg;
+        BUG_ON(lg == NULL);
+
+        pa->pa_obj_lock = &lg->lg_prealloc_lock;
+        pa->pa_inode = NULL;
+
+        ext4_lock_group(sb, ac->ac_b_ex.fe_group);
+        list_add(&pa->pa_group_list, &grp->bb_prealloc_list);
+        ext4_unlock_group(sb, ac->ac_b_ex.fe_group);
+
+        spin_lock(pa->pa_obj_lock);
+        list_add_tail_rcu(&pa->pa_inode_list, &lg->lg_prealloc_list);
+        spin_unlock(pa->pa_obj_lock);
+
+        return 0;
+}
+
+static int ext4_mb_new_preallocation(struct ext4_allocation_context *ac)
+{
+        int err;
+
+        if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC)
+                err = ext4_mb_new_group_pa(ac);
+        else
+                err = ext4_mb_new_inode_pa(ac);
+        return err;
+}
+
+/*
+ * finds all unused blocks in on-disk bitmap, frees them in
+ * in-core bitmap and buddy.
+ * @pa must be unlinked from inode and group lists, so that
+ * nobody else can find/use it.
+ * the caller MUST hold group/inode locks.
+ * TODO: optimize the case when there are no in-core structures yet
+ */
+static int ext4_mb_release_inode_pa(struct ext4_buddy *e4b,
+                                struct buffer_head *bitmap_bh,
+                                struct ext4_prealloc_space *pa)
+{
+        struct ext4_allocation_context ac;
+        struct super_block *sb = e4b->bd_sb;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        unsigned long end;
+        unsigned long next;
+        ext4_group_t group;
+        ext4_grpblk_t bit;
+        sector_t start;
+        int err = 0;
+        int free = 0;
+
+        BUG_ON(pa->pa_deleted == 0);
+        ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);
+        BUG_ON(group != e4b->bd_group && pa->pa_len != 0);
+        end = bit + pa->pa_len;
+
+        ac.ac_sb = sb;
+        ac.ac_inode = pa->pa_inode;
+        ac.ac_op = EXT4_MB_HISTORY_DISCARD;
+
+        while (bit < end) {
+                bit = ext4_find_next_zero_bit(bitmap_bh->b_data, end, bit);
+                if (bit >= end)
+                        break;
+                next = ext4_find_next_bit(bitmap_bh->b_data, end, bit);
+                if (next > end)
+                        next = end;
+                start = group * EXT4_BLOCKS_PER_GROUP(sb) + bit +
+                                le32_to_cpu(sbi->s_es->s_first_data_block);
+                mb_debug("    free preallocated %u/%u in group %u\n",
+                                (unsigned) start, (unsigned) next - bit,
+                                (unsigned) group);
+                free += next - bit;
+
+                ac.ac_b_ex.fe_group = group;
+                ac.ac_b_ex.fe_start = bit;
+                ac.ac_b_ex.fe_len = next - bit;
+                ac.ac_b_ex.fe_logical = 0;
+                ext4_mb_store_history(&ac);
+
+                mb_free_blocks(pa->pa_inode, e4b, bit, next - bit);
+                bit = next + 1;
+        }
+        if (free != pa->pa_free) {
+                printk(KERN_ERR "pa %p: logic %lu, phys. %lu, len %lu\n",
+                        pa, (unsigned long) pa->pa_lstart,
+                        (unsigned long) pa->pa_pstart,
+                        (unsigned long) pa->pa_len);
+                printk(KERN_ERR "free %u, pa_free %u\n", free, pa->pa_free);
+        }
+        BUG_ON(free != pa->pa_free);
+        atomic_add(free, &sbi->s_mb_discarded);
+
+        return err;
+}
+
+static int ext4_mb_release_group_pa(struct ext4_buddy *e4b,
+                                struct ext4_prealloc_space *pa)
+{
+        struct ext4_allocation_context ac;
+        struct super_block *sb = e4b->bd_sb;
+        ext4_group_t group;
+        ext4_grpblk_t bit;
+
+        ac.ac_op = EXT4_MB_HISTORY_DISCARD;
+
+        BUG_ON(pa->pa_deleted == 0);
+        ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);
+        BUG_ON(group != e4b->bd_group && pa->pa_len != 0);
+        mb_free_blocks(pa->pa_inode, e4b, bit, pa->pa_len);
+        atomic_add(pa->pa_len, &EXT4_SB(sb)->s_mb_discarded);
+
+        ac.ac_sb = sb;
+        ac.ac_inode = NULL;
+        ac.ac_b_ex.fe_group = group;
+        ac.ac_b_ex.fe_start = bit;
+        ac.ac_b_ex.fe_len = pa->pa_len;
+        ac.ac_b_ex.fe_logical = 0;
+        ext4_mb_store_history(&ac);
+
+        return 0;
+}
+
+/*
+ * releases all preallocations in given group
+ *
+ * first, we need to decide discard policy:
+ * - when do we discard
+ *   1) ENOSPC
+ * - how many do we discard
+ *   1) how many requested
+ */
+static int ext4_mb_discard_group_preallocations(struct super_block *sb,
+                                        ext4_group_t group, int needed)
+{
+        struct ext4_group_info *grp = ext4_get_group_info(sb, group);
+        struct buffer_head *bitmap_bh = NULL;
+        struct ext4_prealloc_space *pa, *tmp;
+        struct list_head list;
+        struct ext4_buddy e4b;
+        int err;
+        int busy = 0;
+        int free = 0;
+
+        mb_debug("discard preallocation for group %lu\n", group);
+
+        if (list_empty(&grp->bb_prealloc_list))
+                return 0;
+
+        bitmap_bh = read_block_bitmap(sb, group);
+        if (bitmap_bh == NULL) {
+                /* error handling here */
+                ext4_mb_release_desc(&e4b);
+                BUG_ON(bitmap_bh == NULL);
+        }
+
+        err = ext4_mb_load_buddy(sb, group, &e4b);
+        BUG_ON(err != 0); /* error handling here */
+
+        if (needed == 0)
+                needed = EXT4_BLOCKS_PER_GROUP(sb) + 1;
+
+        grp = ext4_get_group_info(sb, group);
+        INIT_LIST_HEAD(&list);
+
+repeat:
+        ext4_lock_group(sb, group);
+        list_for_each_entry_safe(pa, tmp,
+                                &grp->bb_prealloc_list, pa_group_list) {
+                spin_lock(&pa->pa_lock);
+                if (atomic_read(&pa->pa_count)) {
+                        spin_unlock(&pa->pa_lock);
+                        busy = 1;
+                        continue;
+                }
+                if (pa->pa_deleted) {
+                        spin_unlock(&pa->pa_lock);
+                        continue;
+                }
+
+                /* seems this one can be freed ... */
+                pa->pa_deleted = 1;
+
+                /* we can trust pa_free ... */
+                free += pa->pa_free;
+
+                spin_unlock(&pa->pa_lock);
+
+                list_del(&pa->pa_group_list);
+                list_add(&pa->u.pa_tmp_list, &list);
+        }
+
+        /* if we still need more blocks and some PAs were used, try again */
+        if (free < needed && busy) {
+                busy = 0;
+                ext4_unlock_group(sb, group);
+                /*
+                 * Yield the CPU here so that we don't get soft lockup
+                 * in non preempt case.
+                 */
+                yield();
+                goto repeat;
+        }
+
+        /* found anything to free? */
+        if (list_empty(&list)) {
+                BUG_ON(free != 0);
+                goto out;
+        }
+
+        /* now free all selected PAs */
+        list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {
+
+                /* remove from object (inode or locality group) */
+                spin_lock(pa->pa_obj_lock);
+                list_del_rcu(&pa->pa_inode_list);
+                spin_unlock(pa->pa_obj_lock);
+
+                if (pa->pa_linear)
+                        ext4_mb_release_group_pa(&e4b, pa);
+                else
+                        ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);
+
+                list_del(&pa->u.pa_tmp_list);
+                call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);
+        }
+
+out:
+        ext4_unlock_group(sb, group);
+        ext4_mb_release_desc(&e4b);
+        put_bh(bitmap_bh);
+        return free;
+}
+
+/*
+ * releases all non-used preallocated blocks for given inode
+ *
+ * It's important to discard preallocations under i_data_sem
+ * We don't want another block to be served from the prealloc
+ * space when we are discarding the inode prealloc space.
+ *
+ * FIXME!! Make sure it is valid at all the call sites
+ */
+void ext4_mb_discard_inode_preallocations(struct inode *inode)
+{
+        struct ext4_inode_info *ei = EXT4_I(inode);
+        struct super_block *sb = inode->i_sb;
+        struct buffer_head *bitmap_bh = NULL;
+        struct ext4_prealloc_space *pa, *tmp;
+        ext4_group_t group = 0;
+        struct list_head list;
+        struct ext4_buddy e4b;
+        int err;
+
+        if (!test_opt(sb, MBALLOC) || !S_ISREG(inode->i_mode)) {
+                /*BUG_ON(!list_empty(&ei->i_prealloc_list));*/
+                return;
+        }
+
+        mb_debug("discard preallocation for inode %lu\n", inode->i_ino);
+
+        INIT_LIST_HEAD(&list);
+
+repeat:
+        /* first, collect all pa's in the inode */
+        spin_lock(&ei->i_prealloc_lock);
+        while (!list_empty(&ei->i_prealloc_list)) {
+                pa = list_entry(ei->i_prealloc_list.next,
+                                struct ext4_prealloc_space, pa_inode_list);
+                BUG_ON(pa->pa_obj_lock != &ei->i_prealloc_lock);
+                spin_lock(&pa->pa_lock);
+                if (atomic_read(&pa->pa_count)) {
+                        /* this shouldn't happen often - nobody should
+                         * use preallocation while we're discarding it */
+                        spin_unlock(&pa->pa_lock);
+                        spin_unlock(&ei->i_prealloc_lock);
+                        printk(KERN_ERR "uh-oh! used pa while discarding\n");
+                        WARN_ON(1);
+                        schedule_timeout_uninterruptible(HZ);
+                        goto repeat;
+
+                }
+                if (pa->pa_deleted == 0) {
+                        pa->pa_deleted = 1;
+                        spin_unlock(&pa->pa_lock);
+                        list_del_rcu(&pa->pa_inode_list);
+                        list_add(&pa->u.pa_tmp_list, &list);
+                        continue;
+                }
+
+                /* someone is deleting pa right now */
+                spin_unlock(&pa->pa_lock);
+                spin_unlock(&ei->i_prealloc_lock);
+
+                /* we have to wait here because pa_deleted
+                 * doesn't mean pa is already unlinked from
+                 * the list. as we might be called from
+                 * ->clear_inode() the inode will get freed
+                 * and concurrent thread which is unlinking
+                 * pa from inode's list may access already
+                 * freed memory, bad-bad-bad */
+
+                /* XXX: if this happens too often, we can
+                 * add a flag to force wait only in case
+                 * of ->clear_inode(), but not in case of
+                 * regular truncate */
+                schedule_timeout_uninterruptible(HZ);
+                goto repeat;
+        }
+        spin_unlock(&ei->i_prealloc_lock);
+
+        list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {
+                BUG_ON(pa->pa_linear != 0);
+                ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, NULL);
+
+                err = ext4_mb_load_buddy(sb, group, &e4b);
+                BUG_ON(err != 0); /* error handling here */
+
+                bitmap_bh = read_block_bitmap(sb, group);
+                if (bitmap_bh == NULL) {
+                        /* error handling here */
+                        ext4_mb_release_desc(&e4b);
+                        BUG_ON(bitmap_bh == NULL);
+                }
+
+                ext4_lock_group(sb, group);
+                list_del(&pa->pa_group_list);
+                ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);
+                ext4_unlock_group(sb, group);
+
+                ext4_mb_release_desc(&e4b);
+                put_bh(bitmap_bh);
+
+                list_del(&pa->u.pa_tmp_list);
+                call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);
+        }
+}
+
+/*
+ * finds all preallocated spaces and return blocks being freed to them
+ * if preallocated space becomes full (no block is used from the space)
+ * then the function frees space in buddy
+ * XXX: at the moment, truncate (which is the only way to free blocks)
+ * discards all preallocations
+ */
+static void ext4_mb_return_to_preallocation(struct inode *inode,
+                                        struct ext4_buddy *e4b,
+                                        sector_t block, int count)
+{
+        BUG_ON(!list_empty(&EXT4_I(inode)->i_prealloc_list));
+}
+#ifdef MB_DEBUG
+static void ext4_mb_show_ac(struct ext4_allocation_context *ac)
+{
+        struct super_block *sb = ac->ac_sb;
+        ext4_group_t i;
+
+        printk(KERN_ERR "EXT4-fs: Can't allocate:"
+                        " Allocation context details:\n");
+        printk(KERN_ERR "EXT4-fs: status %d flags %d\n",
+                        ac->ac_status, ac->ac_flags);
+        printk(KERN_ERR "EXT4-fs: orig %lu/%lu/%lu@%lu, goal %lu/%lu/%lu@%lu, "
+                        "best %lu/%lu/%lu@%lu cr %d\n",
+                        (unsigned long)ac->ac_o_ex.fe_group,
+                        (unsigned long)ac->ac_o_ex.fe_start,
+                        (unsigned long)ac->ac_o_ex.fe_len,
+                        (unsigned long)ac->ac_o_ex.fe_logical,
+                        (unsigned long)ac->ac_g_ex.fe_group,
+                        (unsigned long)ac->ac_g_ex.fe_start,
+                        (unsigned long)ac->ac_g_ex.fe_len,
+                        (unsigned long)ac->ac_g_ex.fe_logical,
+                        (unsigned long)ac->ac_b_ex.fe_group,
+                        (unsigned long)ac->ac_b_ex.fe_start,
+                        (unsigned long)ac->ac_b_ex.fe_len,
+                        (unsigned long)ac->ac_b_ex.fe_logical,
+                        (int)ac->ac_criteria);
+        printk(KERN_ERR "EXT4-fs: %lu scanned, %d found\n", ac->ac_ex_scanned,
+                ac->ac_found);
+        printk(KERN_ERR "EXT4-fs: groups: \n");
+        for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
+                struct ext4_group_info *grp = ext4_get_group_info(sb, i);
+                struct ext4_prealloc_space *pa;
+                ext4_grpblk_t start;
+                struct list_head *cur;
+                ext4_lock_group(sb, i);
+                list_for_each(cur, &grp->bb_prealloc_list) {
+                        pa = list_entry(cur, struct ext4_prealloc_space,
+                                        pa_group_list);
+                        spin_lock(&pa->pa_lock);
+                        ext4_get_group_no_and_offset(sb, pa->pa_pstart,
+                                                     NULL, &start);
+                        spin_unlock(&pa->pa_lock);
+                        printk(KERN_ERR "PA:%lu:%d:%u \n", i,
+                                                        start, pa->pa_len);
+                }
+                ext4_lock_group(sb, i);
+
+                if (grp->bb_free == 0)
+                        continue;
+                printk(KERN_ERR "%lu: %d/%d \n",
+                       i, grp->bb_free, grp->bb_fragments);
+        }
+        printk(KERN_ERR "\n");
+}
+#else
+static inline void ext4_mb_show_ac(struct ext4_allocation_context *ac)
+{
+        return;
+}
+#endif
+
+/*
+ * We use locality group preallocation for small size file. The size of the
+ * file is determined by the current size or the resulting size after
+ * allocation which ever is larger
+ *
+ * One can tune this size via /proc/fs/ext4/<partition>/stream_req
+ */
+static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+        int bsbits = ac->ac_sb->s_blocksize_bits;
+        loff_t size, isize;
+
+        if (!(ac->ac_flags & EXT4_MB_HINT_DATA))
+                return;
+
+        size = ac->ac_o_ex.fe_logical + ac->ac_o_ex.fe_len;
+        isize = i_size_read(ac->ac_inode) >> bsbits;
+        size = max(size, isize);
+
+        /* don't use group allocation for large files */
+        if (size >= sbi->s_mb_stream_request)
+                return;
+
+        if (unlikely(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY))
+                return;
+
+        BUG_ON(ac->ac_lg != NULL);
+        /*
+         * locality group prealloc space are per cpu. The reason for having
+         * per cpu locality group is to reduce the contention between block
+         * request from multiple CPUs.
+         */
+        ac->ac_lg = &sbi->s_locality_groups[get_cpu()];
+        put_cpu();
+
+        /* we're going to use group allocation */
+        ac->ac_flags |= EXT4_MB_HINT_GROUP_ALLOC;
+
+        /* serialize all allocations in the group */
+        mutex_lock(&ac->ac_lg->lg_mutex);
+}
+
+static int ext4_mb_initialize_context(struct ext4_allocation_context *ac,
+                                struct ext4_allocation_request *ar)
+{
+        struct super_block *sb = ar->inode->i_sb;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        struct ext4_super_block *es = sbi->s_es;
+        ext4_group_t group;
+        unsigned long len;
+        unsigned long goal;
+        ext4_grpblk_t block;
+
+        /* we can't allocate > group size */
+        len = ar->len;
+
+        /* just a dirty hack to filter too big requests  */
+        if (len >= EXT4_BLOCKS_PER_GROUP(sb) - 10)
+                len = EXT4_BLOCKS_PER_GROUP(sb) - 10;
+
+        /* start searching from the goal */
+        goal = ar->goal;
+        if (goal < le32_to_cpu(es->s_first_data_block) ||
+                        goal >= ext4_blocks_count(es))
+                goal = le32_to_cpu(es->s_first_data_block);
+        ext4_get_group_no_and_offset(sb, goal, &group, &block);
+
+        /* set up allocation goals */
+        ac->ac_b_ex.fe_logical = ar->logical;
+        ac->ac_b_ex.fe_group = 0;
+        ac->ac_b_ex.fe_start = 0;
+        ac->ac_b_ex.fe_len = 0;
+        ac->ac_status = AC_STATUS_CONTINUE;
+        ac->ac_groups_scanned = 0;
+        ac->ac_ex_scanned = 0;
+        ac->ac_found = 0;
+        ac->ac_sb = sb;
+        ac->ac_inode = ar->inode;
+        ac->ac_o_ex.fe_logical = ar->logical;
+        ac->ac_o_ex.fe_group = group;
+        ac->ac_o_ex.fe_start = block;
+        ac->ac_o_ex.fe_len = len;
+        ac->ac_g_ex.fe_logical = ar->logical;
+        ac->ac_g_ex.fe_group = group;
+        ac->ac_g_ex.fe_start = block;
+        ac->ac_g_ex.fe_len = len;
+        ac->ac_f_ex.fe_len = 0;
+        ac->ac_flags = ar->flags;
+        ac->ac_2order = 0;
+        ac->ac_criteria = 0;
+        ac->ac_pa = NULL;
+        ac->ac_bitmap_page = NULL;
+        ac->ac_buddy_page = NULL;
+        ac->ac_lg = NULL;
+
+        /* we have to define context: we'll we work with a file or
+         * locality group. this is a policy, actually */
+        ext4_mb_group_or_file(ac);
+
+        mb_debug("init ac: %u blocks @ %u, goal %u, flags %x, 2^%d, "
+                        "left: %u/%u, right %u/%u to %swritable\n",
+                        (unsigned) ar->len, (unsigned) ar->logical,
+                        (unsigned) ar->goal, ac->ac_flags, ac->ac_2order,
+                        (unsigned) ar->lleft, (unsigned) ar->pleft,
+                        (unsigned) ar->lright, (unsigned) ar->pright,
+                        atomic_read(&ar->inode->i_writecount) ? "" : "non-");
+        return 0;
+
+}
+
+/*
+ * release all resource we used in allocation
+ */
+static int ext4_mb_release_context(struct ext4_allocation_context *ac)
+{
+        if (ac->ac_pa) {
+                if (ac->ac_pa->pa_linear) {
+                        /* see comment in ext4_mb_use_group_pa() */
+                        spin_lock(&ac->ac_pa->pa_lock);
+                        ac->ac_pa->pa_pstart += ac->ac_b_ex.fe_len;
+                        ac->ac_pa->pa_lstart += ac->ac_b_ex.fe_len;
+                        ac->ac_pa->pa_free -= ac->ac_b_ex.fe_len;
+                        ac->ac_pa->pa_len -= ac->ac_b_ex.fe_len;
+                        spin_unlock(&ac->ac_pa->pa_lock);
+                }
+                ext4_mb_put_pa(ac, ac->ac_sb, ac->ac_pa);
+        }
+        if (ac->ac_bitmap_page)
+                page_cache_release(ac->ac_bitmap_page);
+        if (ac->ac_buddy_page)
+                page_cache_release(ac->ac_buddy_page);
+        if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC)
+                mutex_unlock(&ac->ac_lg->lg_mutex);
+        ext4_mb_collect_stats(ac);
+        return 0;
+}
+
+static int ext4_mb_discard_preallocations(struct super_block *sb, int needed)
+{
+        ext4_group_t i;
+        int ret;
+        int freed = 0;
+
+        for (i = 0; i < EXT4_SB(sb)->s_groups_count && needed > 0; i++) {
+                ret = ext4_mb_discard_group_preallocations(sb, i, needed);
+                freed += ret;
+                needed -= ret;
+        }
+
+        return freed;
+}
+
+/*
+ * Main entry point into mballoc to allocate blocks
+ * it tries to use preallocation first, then falls back
+ * to usual allocation
+ */
+ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
+                                 struct ext4_allocation_request *ar, int *errp)
+{
+        struct ext4_allocation_context ac;
+        struct ext4_sb_info *sbi;
+        struct super_block *sb;
+        ext4_fsblk_t block = 0;
+        int freed;
+        int inquota;
+
+        sb = ar->inode->i_sb;
+        sbi = EXT4_SB(sb);
+
+        if (!test_opt(sb, MBALLOC)) {
+                block = ext4_new_blocks_old(handle, ar->inode, ar->goal,
+                                            &(ar->len), errp);
+                return block;
+        }
+
+        while (ar->len && DQUOT_ALLOC_BLOCK(ar->inode, ar->len)) {
+                ar->flags |= EXT4_MB_HINT_NOPREALLOC;
+                ar->len--;
+        }
+        if (ar->len == 0) {
+                *errp = -EDQUOT;
+                return 0;
+        }
+        inquota = ar->len;
+
+        ext4_mb_poll_new_transaction(sb, handle);
+
+        *errp = ext4_mb_initialize_context(&ac, ar);
+        if (*errp) {
+                ar->len = 0;
+                goto out;
+        }
+
+        ac.ac_op = EXT4_MB_HISTORY_PREALLOC;
+        if (!ext4_mb_use_preallocated(&ac)) {
+
+                ac.ac_op = EXT4_MB_HISTORY_ALLOC;
+                ext4_mb_normalize_request(&ac, ar);
+
+repeat:
+                /* allocate space in core */
+                ext4_mb_regular_allocator(&ac);
+
+                /* as we've just preallocated more space than
+                 * user requested orinally, we store allocated
+                 * space in a special descriptor */
+                if (ac.ac_status == AC_STATUS_FOUND &&
+                                ac.ac_o_ex.fe_len < ac.ac_b_ex.fe_len)
+                        ext4_mb_new_preallocation(&ac);
+        }
+
+        if (likely(ac.ac_status == AC_STATUS_FOUND)) {
+                ext4_mb_mark_diskspace_used(&ac, handle);
+                *errp = 0;
+                block = ext4_grp_offs_to_block(sb, &ac.ac_b_ex);
+                ar->len = ac.ac_b_ex.fe_len;
+        } else {
+                freed  = ext4_mb_discard_preallocations(sb, ac.ac_o_ex.fe_len);
+                if (freed)
+                        goto repeat;
+                *errp = -ENOSPC;
+                ac.ac_b_ex.fe_len = 0;
+                ar->len = 0;
+                ext4_mb_show_ac(&ac);
+        }
+
+        ext4_mb_release_context(&ac);
+
+out:
+        if (ar->len < inquota)
+                DQUOT_FREE_BLOCK(ar->inode, inquota - ar->len);
+
+        return block;
+}
+static void ext4_mb_poll_new_transaction(struct super_block *sb,
+                                                handle_t *handle)
+{
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+        if (sbi->s_last_transaction == handle->h_transaction->t_tid)
+                return;
+
+        /* new transaction! time to close last one and free blocks for
+         * committed transaction. we know that only transaction can be
+         * active, so previos transaction can be being logged and we
+         * know that transaction before previous is known to be already
+         * logged. this means that now we may free blocks freed in all
+         * transactions before previous one. hope I'm clear enough ... */
+
+        spin_lock(&sbi->s_md_lock);
+        if (sbi->s_last_transaction != handle->h_transaction->t_tid) {
+                mb_debug("new transaction %lu, old %lu\n",
+                                (unsigned long) handle->h_transaction->t_tid,
+                                (unsigned long) sbi->s_last_transaction);
+                list_splice_init(&sbi->s_closed_transaction,
+                                &sbi->s_committed_transaction);
+                list_splice_init(&sbi->s_active_transaction,
+                                &sbi->s_closed_transaction);
+                sbi->s_last_transaction = handle->h_transaction->t_tid;
+        }
+        spin_unlock(&sbi->s_md_lock);
+
+        ext4_mb_free_committed_blocks(sb);
+}
+
+static int ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
+                          ext4_group_t group, ext4_grpblk_t block, int count)
+{
+        struct ext4_group_info *db = e4b->bd_info;
+        struct super_block *sb = e4b->bd_sb;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+        struct ext4_free_metadata *md;
+        int i;
+
+        BUG_ON(e4b->bd_bitmap_page == NULL);
+        BUG_ON(e4b->bd_buddy_page == NULL);
+
+        ext4_lock_group(sb, group);
+        for (i = 0; i < count; i++) {
+                md = db->bb_md_cur;
+                if (md && db->bb_tid != handle->h_transaction->t_tid) {
+                        db->bb_md_cur = NULL;
+                        md = NULL;
+                }
+
+                if (md == NULL) {
+                        ext4_unlock_group(sb, group);
+                        md = kmalloc(sizeof(*md), GFP_NOFS);
+                        if (md == NULL)
+                                return -ENOMEM;
+                        md->num = 0;
+                        md->group = group;
+
+                        ext4_lock_group(sb, group);
+                        if (db->bb_md_cur == NULL) {
+                                spin_lock(&sbi->s_md_lock);
+                                list_add(&md->list, &sbi->s_active_transaction);
+                                spin_unlock(&sbi->s_md_lock);
+                                /* protect buddy cache from being freed,
+                                 * otherwise we'll refresh it from
+                                 * on-disk bitmap and lose not-yet-available
+                                 * blocks */
+                                page_cache_get(e4b->bd_buddy_page);
+                                page_cache_get(e4b->bd_bitmap_page);
+                                db->bb_md_cur = md;
+                                db->bb_tid = handle->h_transaction->t_tid;
+                                mb_debug("new md 0x%p for group %lu\n",
+                                                md, md->group);
+                        } else {
+                                kfree(md);
+                                md = db->bb_md_cur;
+                        }
+                }
+
+                BUG_ON(md->num >= EXT4_BB_MAX_BLOCKS);
+                md->blocks[md->num] = block + i;
+                md->num++;
+                if (md->num == EXT4_BB_MAX_BLOCKS) {
+                        /* no more space, put full container on a sb's list */
+                        db->bb_md_cur = NULL;
+                }
+        }
+        ext4_unlock_group(sb, group);
+        return 0;
+}
+
+/*
+ * Main entry point into mballoc to free blocks
+ */
+void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
+                        unsigned long block, unsigned long count,
+                        int metadata, unsigned long *freed)
+{
+        struct buffer_head *bitmap_bh = 0;
+        struct super_block *sb = inode->i_sb;
+        struct ext4_allocation_context ac;
+        struct ext4_group_desc *gdp;
+        struct ext4_super_block *es;
+        unsigned long overflow;
+        ext4_grpblk_t bit;
+        struct buffer_head *gd_bh;
+        ext4_group_t block_group;
+        struct ext4_sb_info *sbi;
+        struct ext4_buddy e4b;
+        int err = 0;
+        int ret;
+
+        *freed = 0;
+
+        ext4_mb_poll_new_transaction(sb, handle);
+
+        sbi = EXT4_SB(sb);
+        es = EXT4_SB(sb)->s_es;
+        if (block < le32_to_cpu(es->s_first_data_block) ||
+            block + count < block ||
+            block + count > ext4_blocks_count(es)) {
+                ext4_error(sb, __FUNCTION__,
+                            "Freeing blocks not in datazone - "
+                            "block = %lu, count = %lu", block, count);
+                goto error_return;
+        }
+
+        ext4_debug("freeing block %lu\n", block);
+
+        ac.ac_op = EXT4_MB_HISTORY_FREE;
+        ac.ac_inode = inode;
+        ac.ac_sb = sb;
+
+do_more:
+        overflow = 0;
+        ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
+
+        /*
+         * Check to see if we are freeing blocks across a group
+         * boundary.
+         */
+        if (bit + count > EXT4_BLOCKS_PER_GROUP(sb)) {
+                overflow = bit + count - EXT4_BLOCKS_PER_GROUP(sb);
+                count -= overflow;
+        }
+        bitmap_bh = read_block_bitmap(sb, block_group);
+        if (!bitmap_bh)
+                goto error_return;
+        gdp = ext4_get_group_desc(sb, block_group, &gd_bh);
+        if (!gdp)
+                goto error_return;
+
+        if (in_range(ext4_block_bitmap(sb, gdp), block, count) ||
+            in_range(ext4_inode_bitmap(sb, gdp), block, count) ||
+            in_range(block, ext4_inode_table(sb, gdp),
+                      EXT4_SB(sb)->s_itb_per_group) ||
+            in_range(block + count - 1, ext4_inode_table(sb, gdp),
+                      EXT4_SB(sb)->s_itb_per_group)) {
+
+                ext4_error(sb, __FUNCTION__,
+                           "Freeing blocks in system zone - "
+                           "Block = %lu, count = %lu", block, count);
+        }
+
+        BUFFER_TRACE(bitmap_bh, "getting write access");
+        err = ext4_journal_get_write_access(handle, bitmap_bh);
+        if (err)
+                goto error_return;
+
+        /*
+         * We are about to modify some metadata.  Call the journal APIs
+         * to unshare ->b_data if a currently-committing transaction is
+         * using it
+         */
+        BUFFER_TRACE(gd_bh, "get_write_access");
+        err = ext4_journal_get_write_access(handle, gd_bh);
+        if (err)
+                goto error_return;
+
+        err = ext4_mb_load_buddy(sb, block_group, &e4b);
+        if (err)
+                goto error_return;
+
+#ifdef AGGRESSIVE_CHECK
+        {
+                int i;
+                for (i = 0; i < count; i++)
+                        BUG_ON(!mb_test_bit(bit + i, bitmap_bh->b_data));
+        }
+#endif
+        mb_clear_bits(sb_bgl_lock(sbi, block_group), bitmap_bh->b_data,
+                        bit, count);
+
+        /* We dirtied the bitmap block */
+        BUFFER_TRACE(bitmap_bh, "dirtied bitmap block");
+        err = ext4_journal_dirty_metadata(handle, bitmap_bh);
+
+        ac.ac_b_ex.fe_group = block_group;
+        ac.ac_b_ex.fe_start = bit;
+        ac.ac_b_ex.fe_len = count;
+        ext4_mb_store_history(&ac);
+
+        if (metadata) {
+                /* blocks being freed are metadata. these blocks shouldn't
+                 * be used until this transaction is committed */
+                ext4_mb_free_metadata(handle, &e4b, block_group, bit, count);
+        } else {
+                ext4_lock_group(sb, block_group);
+                err = mb_free_blocks(inode, &e4b, bit, count);
+                ext4_mb_return_to_preallocation(inode, &e4b, block, count);
+                ext4_unlock_group(sb, block_group);
+                BUG_ON(err != 0);
+        }
+
+        spin_lock(sb_bgl_lock(sbi, block_group));
+        gdp->bg_free_blocks_count =
+                cpu_to_le16(le16_to_cpu(gdp->bg_free_blocks_count) + count);
+        gdp->bg_checksum = ext4_group_desc_csum(sbi, block_group, gdp);
+        spin_unlock(sb_bgl_lock(sbi, block_group));
+        percpu_counter_add(&sbi->s_freeblocks_counter, count);
+
+        ext4_mb_release_desc(&e4b);
+
+        *freed += count;
+
+        /* And the group descriptor block */
+        BUFFER_TRACE(gd_bh, "dirtied group descriptor block");
+        ret = ext4_journal_dirty_metadata(handle, gd_bh);
+        if (!err)
+                err = ret;
+
+        if (overflow && !err) {
+                block += count;
+                count = overflow;
+                put_bh(bitmap_bh);
+                goto do_more;
+        }
+        sb->s_dirt = 1;
+error_return:
+        brelse(bitmap_bh);
+        ext4_std_error(sb, err);
+        return;
+}
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
new file mode 100644
index 000000000000..3ebc2332f52e
--- /dev/null
+++ b/fs/ext4/migrate.c
@@ -0,0 +1,560 @@
+/*
+ * Copyright IBM Corporation, 2007
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/ext4_jbd2.h>
+#include <linux/ext4_fs_extents.h>
+
+/*
+ * The contiguous blocks details which can be
+ * represented by a single extent
+ */
+struct list_blocks_struct {
+        ext4_lblk_t first_block, last_block;
+        ext4_fsblk_t first_pblock, last_pblock;
+};
+
+static int finish_range(handle_t *handle, struct inode *inode,
+                                struct list_blocks_struct *lb)
+
+{
+        int retval = 0, needed;
+        struct ext4_extent newext;
+        struct ext4_ext_path *path;
+        if (lb->first_pblock == 0)
+                return 0;
+
+        /* Add the extent to temp inode*/
+        newext.ee_block = cpu_to_le32(lb->first_block);
+        newext.ee_len   = cpu_to_le16(lb->last_block - lb->first_block + 1);
+        ext4_ext_store_pblock(&newext, lb->first_pblock);
+        path = ext4_ext_find_extent(inode, lb->first_block, NULL);
+
+        if (IS_ERR(path)) {
+                retval = PTR_ERR(path);
+                goto err_out;
+        }
+
+        /*
+         * Calculate the credit needed to inserting this extent
+         * Since we are doing this in loop we may accumalate extra
+         * credit. But below we try to not accumalate too much
+         * of them by restarting the journal.
+         */
+        needed = ext4_ext_calc_credits_for_insert(inode, path);
+
+        /*
+         * Make sure the credit we accumalated is not really high
+         */
+        if (needed && handle->h_buffer_credits >= EXT4_RESERVE_TRANS_BLOCKS) {
+                retval = ext4_journal_restart(handle, needed);
+                if (retval)
+                        goto err_out;
+        }
+        if (needed) {
+                retval = ext4_journal_extend(handle, needed);
+                if (retval != 0) {
+                        /*
+                         * IF not able to extend the journal restart the journal
+                         */
+                        retval = ext4_journal_restart(handle, needed);
+                        if (retval)
+                                goto err_out;
+                }
+        }
+        retval = ext4_ext_insert_extent(handle, inode, path, &newext);
+err_out:
+        lb->first_pblock = 0;
+        return retval;
+}
+
+static int update_extent_range(handle_t *handle, struct inode *inode,
+                                ext4_fsblk_t pblock, ext4_lblk_t blk_num,
+                                struct list_blocks_struct *lb)
+{
+        int retval;
+        /*
+         * See if we can add on to the existing range (if it exists)
+         */
+        if (lb->first_pblock &&
+                (lb->last_pblock+1 == pblock) &&
+                (lb->last_block+1 == blk_num)) {
+                lb->last_pblock = pblock;
+                lb->last_block = blk_num;
+                return 0;
+        }
+        /*
+         * Start a new range.
+         */
+        retval = finish_range(handle, inode, lb);
+        lb->first_pblock = lb->last_pblock = pblock;
+        lb->first_block = lb->last_block = blk_num;
+
+        return retval;
+}
+
+static int update_ind_extent_range(handle_t *handle, struct inode *inode,
+                                   ext4_fsblk_t pblock, ext4_lblk_t *blk_nump,
+                                   struct list_blocks_struct *lb)
+{
+        struct buffer_head *bh;
+        __le32 *i_data;
+        int i, retval = 0;
+        ext4_lblk_t blk_count = *blk_nump;
+        unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
+
+        if (!pblock) {
+                /* Only update the file block number */
+                *blk_nump += max_entries;
+                return 0;
+        }
+
+        bh = sb_bread(inode->i_sb, pblock);
+        if (!bh)
+                return -EIO;
+
+        i_data = (__le32 *)bh->b_data;
+        for (i = 0; i < max_entries; i++, blk_count++) {
+                if (i_data[i]) {
+                        retval = update_extent_range(handle, inode,
+                                                le32_to_cpu(i_data[i]),
+                                                blk_count, lb);
+                        if (retval)
+                                break;
+                }
+        }
+
+        /* Update the file block number */
+        *blk_nump = blk_count;
+        put_bh(bh);
+        return retval;
+
+}
+
+static int update_dind_extent_range(handle_t *handle, struct inode *inode,
+                                    ext4_fsblk_t pblock, ext4_lblk_t *blk_nump,
+                                    struct list_blocks_struct *lb)
+{
+        struct buffer_head *bh;
+        __le32 *i_data;
+        int i, retval = 0;
+        ext4_lblk_t blk_count = *blk_nump;
+        unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
+
+        if (!pblock) {
+                /* Only update the file block number */
+                *blk_nump += max_entries * max_entries;
+                return 0;
+        }
+        bh = sb_bread(inode->i_sb, pblock);
+        if (!bh)
+                return -EIO;
+
+        i_data = (__le32 *)bh->b_data;
+        for (i = 0; i < max_entries; i++) {
+                if (i_data[i]) {
+                        retval = update_ind_extent_range(handle, inode,
+                                                le32_to_cpu(i_data[i]),
+                                                &blk_count, lb);
+                        if (retval)
+                                break;
+                } else {
+                        /* Only update the file block number */
+                        blk_count += max_entries;
+                }
+        }
+
+        /* Update the file block number */
+        *blk_nump = blk_count;
+        put_bh(bh);
+        return retval;
+
+}
+
+static int update_tind_extent_range(handle_t *handle, struct inode *inode,
+                                     ext4_fsblk_t pblock, ext4_lblk_t *blk_nump,
+                                     struct list_blocks_struct *lb)
+{
+        struct buffer_head *bh;
+        __le32 *i_data;
+        int i, retval = 0;
+        ext4_lblk_t blk_count = *blk_nump;
+        unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
+
+        if (!pblock) {
+                /* Only update the file block number */
+                *blk_nump += max_entries * max_entries * max_entries;
+                return 0;
+        }
+        bh = sb_bread(inode->i_sb, pblock);
+        if (!bh)
+                return -EIO;
+
+        i_data = (__le32 *)bh->b_data;
+        for (i = 0; i < max_entries; i++) {
+                if (i_data[i]) {
+                        retval = update_dind_extent_range(handle, inode,
+                                                le32_to_cpu(i_data[i]),
+                                                &blk_count, lb);
+                        if (retval)
+                                break;
+                } else
+                        /* Only update the file block number */
+                        blk_count += max_entries * max_entries;
+        }
+        /* Update the file block number */
+        *blk_nump = blk_count;
+        put_bh(bh);
+        return retval;
+
+}
+
+static int free_dind_blocks(handle_t *handle,
+                                struct inode *inode, __le32 i_data)
+{
+        int i;
+        __le32 *tmp_idata;
+        struct buffer_head *bh;
+        unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
+
+        bh = sb_bread(inode->i_sb, le32_to_cpu(i_data));
+        if (!bh)
+                return -EIO;
+
+        tmp_idata = (__le32 *)bh->b_data;
+        for (i = 0; i < max_entries; i++) {
+                if (tmp_idata[i])
+                        ext4_free_blocks(handle, inode,
+                                        le32_to_cpu(tmp_idata[i]), 1, 1);
+        }
+        put_bh(bh);
+        ext4_free_blocks(handle, inode, le32_to_cpu(i_data), 1, 1);
+        return 0;
+}
+
+static int free_tind_blocks(handle_t *handle,
+                                struct inode *inode, __le32 i_data)
+{
+        int i, retval = 0;
+        __le32 *tmp_idata;
+        struct buffer_head *bh;
+        unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
+
+        bh = sb_bread(inode->i_sb, le32_to_cpu(i_data));
+        if (!bh)
+                return -EIO;
+
+        tmp_idata = (__le32 *)bh->b_data;
+        for (i = 0; i < max_entries; i++) {
+                if (tmp_idata[i]) {
+                        retval = free_dind_blocks(handle,
+                                        inode, tmp_idata[i]);
+                        if (retval) {
+                                put_bh(bh);
+                                return retval;
+                        }
+                }
+        }
+        put_bh(bh);
+        ext4_free_blocks(handle, inode, le32_to_cpu(i_data), 1, 1);
+        return 0;
+}
+
+static int free_ind_block(handle_t *handle, struct inode *inode)
+{
+        int retval;
+        struct ext4_inode_info *ei = EXT4_I(inode);
+
+        if (ei->i_data[EXT4_IND_BLOCK])
+                ext4_free_blocks(handle, inode,
+                                le32_to_cpu(ei->i_data[EXT4_IND_BLOCK]), 1, 1);
+
+        if (ei->i_data[EXT4_DIND_BLOCK]) {
+                retval = free_dind_blocks(handle, inode,
+                                                ei->i_data[EXT4_DIND_BLOCK]);
+                if (retval)
+                        return retval;
+        }
+
+        if (ei->i_data[EXT4_TIND_BLOCK]) {
+                retval = free_tind_blocks(handle, inode,
+                                                ei->i_data[EXT4_TIND_BLOCK]);
+                if (retval)
+                        return retval;
+        }
+        return 0;
+}
+
+static int ext4_ext_swap_inode_data(handle_t *handle, struct inode *inode,
+                                struct inode *tmp_inode, int retval)
+{
+        struct ext4_inode_info *ei = EXT4_I(inode);
+        struct ext4_inode_info *tmp_ei = EXT4_I(tmp_inode);
+
+        retval = free_ind_block(handle, inode);
+        if (retval)
+                goto err_out;
+
+        /*
+         * One credit accounted for writing the
+         * i_data field of the original inode
+         */
+        retval = ext4_journal_extend(handle, 1);
+        if (retval != 0) {
+                retval = ext4_journal_restart(handle, 1);
+                if (retval)
+                        goto err_out;
+        }
+
+        /*
+         * We have the extent map build with the tmp inode.
+         * Now copy the i_data across
+         */
+        ei->i_flags |= EXT4_EXTENTS_FL;
+        memcpy(ei->i_data, tmp_ei->i_data, sizeof(ei->i_data));
+
+        /*
+         * Update i_blocks with the new blocks that got
+         * allocated while adding extents for extent index
+         * blocks.
+         *
+         * While converting to extents we need not
+         * update the orignal inode i_blocks for extent blocks
+         * via quota APIs. The quota update happened via tmp_inode already.
+         */
+        spin_lock(&inode->i_lock);
+        inode->i_blocks += tmp_inode->i_blocks;
+        spin_unlock(&inode->i_lock);
+
+        ext4_mark_inode_dirty(handle, inode);
+err_out:
+        return retval;
+}
+
+static int free_ext_idx(handle_t *handle, struct inode *inode,
+                                        struct ext4_extent_idx *ix)
+{
+        int i, retval = 0;
+        ext4_fsblk_t block;
+        struct buffer_head *bh;
+        struct ext4_extent_header *eh;
+
+        block = idx_pblock(ix);
+        bh = sb_bread(inode->i_sb, block);
+        if (!bh)
+                return -EIO;
+
+        eh = (struct ext4_extent_header *)bh->b_data;
+        if (eh->eh_depth != 0) {
+                ix = EXT_FIRST_INDEX(eh);
+                for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ix++) {
+                        retval = free_ext_idx(handle, inode, ix);
+                        if (retval)
+                                break;
+                }
+        }
+        put_bh(bh);
+        ext4_free_blocks(handle, inode, block, 1, 1);
+        return retval;
+}
+
+/*
+ * Free the extent meta data blocks only
+ */
+static int free_ext_block(handle_t *handle, struct inode *inode)
+{
+        int i, retval = 0;
+        struct ext4_inode_info *ei = EXT4_I(inode);
+        struct ext4_extent_header *eh = (struct ext4_extent_header *)ei->i_data;
+        struct ext4_extent_idx *ix;
+        if (eh->eh_depth == 0)
+                /*
+                 * No extra blocks allocated for extent meta data
+                 */
+                return 0;
+        ix = EXT_FIRST_INDEX(eh);
+        for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ix++) {
+                retval = free_ext_idx(handle, inode, ix);
+                if (retval)
+                        return retval;
+        }
+        return retval;
+
+}
+
+int ext4_ext_migrate(struct inode *inode, struct file *filp,
+                                unsigned int cmd, unsigned long arg)
+{
+        handle_t *handle;
+        int retval = 0, i;
+        __le32 *i_data;
+        ext4_lblk_t blk_count = 0;
+        struct ext4_inode_info *ei;
+        struct inode *tmp_inode = NULL;
+        struct list_blocks_struct lb;
+        unsigned long max_entries;
+
+        if (!test_opt(inode->i_sb, EXTENTS))
+                /*
+                 * if mounted with noextents we don't allow the migrate
+                 */
+                return -EINVAL;
+
+        if ((EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+                return -EINVAL;
+
+        down_write(&EXT4_I(inode)->i_data_sem);
+        handle = ext4_journal_start(inode,
+                                        EXT4_DATA_TRANS_BLOCKS(inode->i_sb) +
+                                        EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+                                        2 * EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)
+                                        + 1);
+        if (IS_ERR(handle)) {
+                retval = PTR_ERR(handle);
+                goto err_out;
+        }
+        tmp_inode = ext4_new_inode(handle,
+                                inode->i_sb->s_root->d_inode,
+                                S_IFREG);
+        if (IS_ERR(tmp_inode)) {
+                retval = -ENOMEM;
+                ext4_journal_stop(handle);
+                tmp_inode = NULL;
+                goto err_out;
+        }
+        i_size_write(tmp_inode, i_size_read(inode));
+        /*
+         * We don't want the inode to be reclaimed
+         * if we got interrupted in between. We have
+         * this tmp inode carrying reference to the
+         * data blocks of the original file. We set
+         * the i_nlink to zero at the last stage after
+         * switching the original file to extent format
+         */
+        tmp_inode->i_nlink = 1;
+
+        ext4_ext_tree_init(handle, tmp_inode);
+        ext4_orphan_add(handle, tmp_inode);
+        ext4_journal_stop(handle);
+
+        ei = EXT4_I(inode);
+        i_data = ei->i_data;
+        memset(&lb, 0, sizeof(lb));
+
+        /* 32 bit block address 4 bytes */
+        max_entries = inode->i_sb->s_blocksize >> 2;
+
+        /*
+         * start with one credit accounted for
+         * superblock modification.
+         *
+         * For the tmp_inode we already have commited the
+         * trascation that created the inode. Later as and
+         * when we add extents we extent the journal
+         */
+        handle = ext4_journal_start(inode, 1);
+        for (i = 0; i < EXT4_NDIR_BLOCKS; i++, blk_count++) {
+                if (i_data[i]) {
+                        retval = update_extent_range(handle, tmp_inode,
+                                                le32_to_cpu(i_data[i]),
+                                                blk_count, &lb);
+                        if (retval)
+                                goto err_out;
+                }
+        }
+        if (i_data[EXT4_IND_BLOCK]) {
+                retval = update_ind_extent_range(handle, tmp_inode,
+                                        le32_to_cpu(i_data[EXT4_IND_BLOCK]),
+                                        &blk_count, &lb);
+                        if (retval)
+                                goto err_out;
+        } else
+                blk_count +=  max_entries;
+        if (i_data[EXT4_DIND_BLOCK]) {
+                retval = update_dind_extent_range(handle, tmp_inode,
+                                        le32_to_cpu(i_data[EXT4_DIND_BLOCK]),
+                                        &blk_count, &lb);
+                        if (retval)
+                                goto err_out;
+        } else
+                blk_count += max_entries * max_entries;
+        if (i_data[EXT4_TIND_BLOCK]) {
+                retval = update_tind_extent_range(handle, tmp_inode,
+                                        le32_to_cpu(i_data[EXT4_TIND_BLOCK]),
+                                        &blk_count, &lb);
+                        if (retval)
+                                goto err_out;
+        }
+        /*
+         * Build the last extent
+         */
+        retval = finish_range(handle, tmp_inode, &lb);
+err_out:
+        /*
+         * We are either freeing extent information or indirect
+         * blocks. During this we touch superblock, group descriptor
+         * and block bitmap. Later we mark the tmp_inode dirty
+         * via ext4_ext_tree_init. So allocate a credit of 4
+         * We may update quota (user and group).
+         *
+         * FIXME!! we may be touching bitmaps in different block groups.
+         */
+        if (ext4_journal_extend(handle,
+                        4 + 2*EXT4_QUOTA_TRANS_BLOCKS(inode->i_sb)) != 0)
+                ext4_journal_restart(handle,
+                                4 + 2*EXT4_QUOTA_TRANS_BLOCKS(inode->i_sb));
+        if (retval)
+                /*
+                 * Failure case delete the extent information with the
+                 * tmp_inode
+                 */
+                free_ext_block(handle, tmp_inode);
+        else
+                retval = ext4_ext_swap_inode_data(handle, inode,
+                                                        tmp_inode, retval);
+
+        /*
+         * Mark the tmp_inode as of size zero
+         */
+        i_size_write(tmp_inode, 0);
+
+        /*
+         * set the  i_blocks count to zero
+         * so that the ext4_delete_inode does the
+         * right job
+         *
+         * We don't need to take the i_lock because
+         * the inode is not visible to user space.
+         */
+        tmp_inode->i_blocks = 0;
+
+        /* Reset the extent details */
+        ext4_ext_tree_init(handle, tmp_inode);
+
+        /*
+         * Set the i_nlink to zero so that
+         * generic_drop_inode really deletes the
+         * inode
+         */
+        tmp_inode->i_nlink = 0;
+
+        ext4_journal_stop(handle);
+
+        up_write(&EXT4_I(inode)->i_data_sem);
+
+        if (tmp_inode)
+                iput(tmp_inode);
+
+        return retval;
+}
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 94ee6f315dc1..67b6d8a1ceff 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -51,7 +51,7 @@
 
 static struct buffer_head *ext4_append(handle_t *handle,
                                         struct inode *inode,
-                                        u32 *block, int *err)
+                                        ext4_lblk_t *block, int *err)
 {
         struct buffer_head *bh;
 
@@ -144,8 +144,8 @@ struct dx_map_entry
         u16 size;
 };
 
-static inline unsigned dx_get_block (struct dx_entry *entry);
-static void dx_set_block (struct dx_entry *entry, unsigned value);
+static inline ext4_lblk_t dx_get_block(struct dx_entry *entry);
+static void dx_set_block(struct dx_entry *entry, ext4_lblk_t value);
 static inline unsigned dx_get_hash (struct dx_entry *entry);
 static void dx_set_hash (struct dx_entry *entry, unsigned value);
 static unsigned dx_get_count (struct dx_entry *entries);
@@ -166,7 +166,8 @@ static void dx_sort_map(struct dx_map_entry *map, unsigned count);
 static struct ext4_dir_entry_2 *dx_move_dirents (char *from, char *to,
                 struct dx_map_entry *offsets, int count);
 static struct ext4_dir_entry_2* dx_pack_dirents (char *base, int size);
-static void dx_insert_block (struct dx_frame *frame, u32 hash, u32 block);
+static void dx_insert_block(struct dx_frame *frame,
+                                        u32 hash, ext4_lblk_t block);
 static int ext4_htree_next_block(struct inode *dir, __u32 hash,
                                  struct dx_frame *frame,
                                  struct dx_frame *frames,
@@ -181,12 +182,12 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
  * Mask them off for now.
  */
 
-static inline unsigned dx_get_block (struct dx_entry *entry)
+static inline ext4_lblk_t dx_get_block(struct dx_entry *entry)
 {
         return le32_to_cpu(entry->block) & 0x00ffffff;
 }
 
-static inline void dx_set_block (struct dx_entry *entry, unsigned value)
+static inline void dx_set_block(struct dx_entry *entry, ext4_lblk_t value)
 {
         entry->block = cpu_to_le32(value);
 }
@@ -243,8 +244,8 @@ static void dx_show_index (char * label, struct dx_entry *entries)
         int i, n = dx_get_count (entries);
         printk("%s index ", label);
         for (i = 0; i < n; i++) {
-                printk("%x->%u ", i? dx_get_hash(entries + i) :
-                                0, dx_get_block(entries + i));
+                printk("%x->%lu ", i? dx_get_hash(entries + i) :
+                                0, (unsigned long)dx_get_block(entries + i));
         }
         printk("\n");
 }
@@ -280,7 +281,7 @@ static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext4_dir_ent
                         space += EXT4_DIR_REC_LEN(de->name_len);
                         names++;
                 }
-                de = (struct ext4_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
+                de = ext4_next_entry(de);
         }
         printk("(%i)\n", names);
         return (struct stats) { names, space, 1 };
@@ -297,7 +298,8 @@ struct stats dx_show_entries(struct dx_hash_info *hinfo, struct inode *dir,
         printk("%i indexed blocks...\n", count);
         for (i = 0; i < count; i++, entries++)
         {
-                u32 block = dx_get_block(entries), hash = i? dx_get_hash(entries): 0;
+                ext4_lblk_t block = dx_get_block(entries);
+                ext4_lblk_t hash  = i ? dx_get_hash(entries): 0;
                 u32 range = i < count - 1? (dx_get_hash(entries + 1) - hash): ~hash;
                 struct stats stats;
                 printk("%s%3u:%03u hash %8x/%8x ",levels?"":"   ", i, block, hash, range);
@@ -551,7 +553,8 @@ static int ext4_htree_next_block(struct inode *dir, __u32 hash,
  */
 static inline struct ext4_dir_entry_2 *ext4_next_entry(struct ext4_dir_entry_2 *p)
 {
-        return (struct ext4_dir_entry_2 *)((char*)p + le16_to_cpu(p->rec_len));
+        return (struct ext4_dir_entry_2 *)((char *)p +
+                ext4_rec_len_from_disk(p->rec_len));
 }
 
 /*
@@ -560,7 +563,7 @@ static inline struct ext4_dir_entry_2 *ext4_next_entry(struct ext4_dir_entry_2 *
  * into the tree.  If there is an error it is returned in err.
  */
 static int htree_dirblock_to_tree(struct file *dir_file,
-                                  struct inode *dir, int block,
+                                  struct inode *dir, ext4_lblk_t block,
                                   struct dx_hash_info *hinfo,
                                   __u32 start_hash, __u32 start_minor_hash)
 {
@@ -568,7 +571,8 @@ static int htree_dirblock_to_tree(struct file *dir_file,
         struct ext4_dir_entry_2 *de, *top;
         int err, count = 0;
 
-        dxtrace(printk("In htree dirblock_to_tree: block %d\n", block));
+        dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n",
+                                                        (unsigned long)block));
         if (!(bh = ext4_bread (NULL, dir, block, 0, &err)))
                 return err;
 
@@ -620,9 +624,9 @@ int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
         struct ext4_dir_entry_2 *de;
         struct dx_frame frames[2], *frame;
         struct inode *dir;
-        int block, err;
+        ext4_lblk_t block;
         int count = 0;
-        int ret;
+        int ret, err;
         __u32 hashval;
 
         dxtrace(printk("In htree_fill_tree, start hash: %x:%x\n", start_hash,
@@ -720,7 +724,7 @@ static int dx_make_map (struct ext4_dir_entry_2 *de, int size,
                         cond_resched();
                 }
                 /* XXX: do we need to check rec_len == 0 case? -Chris */
-                de = (struct ext4_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
+                de = ext4_next_entry(de);
         }
         return count;
 }
@@ -752,7 +756,7 @@ static void dx_sort_map (struct dx_map_entry *map, unsigned count)
         } while(more);
 }
 
-static void dx_insert_block(struct dx_frame *frame, u32 hash, u32 block)
+static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block)
 {
         struct dx_entry *entries = frame->entries;
         struct dx_entry *old = frame->at, *new = old + 1;
@@ -820,7 +824,7 @@ static inline int search_dirblock(struct buffer_head * bh,
                         return 1;
                 }
                 /* prevent looping on a bad block */
-                de_len = le16_to_cpu(de->rec_len);
+                de_len = ext4_rec_len_from_disk(de->rec_len);
                 if (de_len <= 0)
                         return -1;
                 offset += de_len;
@@ -847,23 +851,20 @@ static struct buffer_head * ext4_find_entry (struct dentry *dentry,
         struct super_block * sb;
         struct buffer_head * bh_use[NAMEI_RA_SIZE];
         struct buffer_head * bh, *ret = NULL;
-        unsigned long start, block, b;
+        ext4_lblk_t start, block, b;
         int ra_max = 0;         /* Number of bh's in the readahead
                                    buffer, bh_use[] */
         int ra_ptr = 0;         /* Current index into readahead
                                    buffer */
         int num = 0;
-        int nblocks, i, err;
+        ext4_lblk_t  nblocks;
+        int i, err;
         struct inode *dir = dentry->d_parent->d_inode;
         int namelen;
-        const u8 *name;
-        unsigned blocksize;
 
         *res_dir = NULL;
         sb = dir->i_sb;
-        blocksize = sb->s_blocksize;
         namelen = dentry->d_name.len;
-        name = dentry->d_name.name;
         if (namelen > EXT4_NAME_LEN)
                 return NULL;
         if (is_dx(dir)) {
@@ -914,7 +915,8 @@ restart:
                 if (!buffer_uptodate(bh)) {
                         /* read error, skip block & hope for the best */
                         ext4_error(sb, __FUNCTION__, "reading directory #%lu "
-                                   "offset %lu", dir->i_ino, block);
+                                   "offset %lu", dir->i_ino,
+                                   (unsigned long)block);
                         brelse(bh);
                         goto next;
                 }
@@ -961,7 +963,7 @@ static struct buffer_head * ext4_dx_find_entry(struct dentry *dentry,
         struct dx_frame frames[2], *frame;
         struct ext4_dir_entry_2 *de, *top;
         struct buffer_head *bh;
-        unsigned long block;
+        ext4_lblk_t block;
         int retval;
         int namelen = dentry->d_name.len;
         const u8 *name = dentry->d_name.name;
@@ -1128,7 +1130,7 @@ dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count)
                 rec_len = EXT4_DIR_REC_LEN(de->name_len);
                 memcpy (to, de, rec_len);
                 ((struct ext4_dir_entry_2 *) to)->rec_len =
-                                cpu_to_le16(rec_len);
+                                ext4_rec_len_to_disk(rec_len);
                 de->inode = 0;
                 map++;
                 to += rec_len;
@@ -1147,13 +1149,12 @@ static struct ext4_dir_entry_2* dx_pack_dirents(char *base, int size)
 
         prev = to = de;
         while ((char*)de < base + size) {
-                next = (struct ext4_dir_entry_2 *) ((char *) de +
-                                                    le16_to_cpu(de->rec_len));
+                next = ext4_next_entry(de);
                 if (de->inode && de->name_len) {
                         rec_len = EXT4_DIR_REC_LEN(de->name_len);
                         if (de > to)
                                 memmove(to, de, rec_len);
-                        to->rec_len = cpu_to_le16(rec_len);
+                        to->rec_len = ext4_rec_len_to_disk(rec_len);
                         prev = to;
                         to = (struct ext4_dir_entry_2 *) (((char *) to) + rec_len);
                 }
@@ -1174,7 +1175,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
         unsigned blocksize = dir->i_sb->s_blocksize;
         unsigned count, continued;
         struct buffer_head *bh2;
-        u32 newblock;
+        ext4_lblk_t newblock;
         u32 hash2;
         struct dx_map_entry *map;
         char *data1 = (*bh)->b_data, *data2;
@@ -1221,14 +1222,15 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
         split = count - move;
         hash2 = map[split].hash;
         continued = hash2 == map[split - 1].hash;
-        dxtrace(printk("Split block %i at %x, %i/%i\n",
-                dx_get_block(frame->at), hash2, split, count-split));
+        dxtrace(printk(KERN_INFO "Split block %lu at %x, %i/%i\n",
+                        (unsigned long)dx_get_block(frame->at),
+                                        hash2, split, count-split));
 
         /* Fancy dance to stay within two buffers */
         de2 = dx_move_dirents(data1, data2, map + split, count - split);
         de = dx_pack_dirents(data1,blocksize);
-        de->rec_len = cpu_to_le16(data1 + blocksize - (char *) de);
-        de2->rec_len = cpu_to_le16(data2 + blocksize - (char *) de2);
+        de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de);
+        de2->rec_len = ext4_rec_len_to_disk(data2 + blocksize - (char *) de2);
         dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data1, blocksize, 1));
         dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data2, blocksize, 1));
 
@@ -1297,7 +1299,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
                                 return -EEXIST;
                         }
                         nlen = EXT4_DIR_REC_LEN(de->name_len);
-                        rlen = le16_to_cpu(de->rec_len);
+                        rlen = ext4_rec_len_from_disk(de->rec_len);
                         if ((de->inode? rlen - nlen: rlen) >= reclen)
                                 break;
                         de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
@@ -1316,11 +1318,11 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
 
         /* By now the buffer is marked for journaling */
         nlen = EXT4_DIR_REC_LEN(de->name_len);
-        rlen = le16_to_cpu(de->rec_len);
+        rlen = ext4_rec_len_from_disk(de->rec_len);
         if (de->inode) {
                 struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen);
-                de1->rec_len = cpu_to_le16(rlen - nlen);
-                de->rec_len = cpu_to_le16(nlen);
+                de1->rec_len = ext4_rec_len_to_disk(rlen - nlen);
+                de->rec_len = ext4_rec_len_to_disk(nlen);
                 de = de1;
         }
         de->file_type = EXT4_FT_UNKNOWN;
@@ -1374,7 +1376,7 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
         int             retval;
         unsigned        blocksize;
         struct dx_hash_info hinfo;
-        u32             block;
+        ext4_lblk_t  block;
         struct fake_dirent *fde;
 
         blocksize =  dir->i_sb->s_blocksize;
@@ -1397,17 +1399,18 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
 
         /* The 0th block becomes the root, move the dirents out */
         fde = &root->dotdot;
-        de = (struct ext4_dir_entry_2 *)((char *)fde + le16_to_cpu(fde->rec_len));
+        de = (struct ext4_dir_entry_2 *)((char *)fde +
+                ext4_rec_len_from_disk(fde->rec_len));
         len = ((char *) root) + blocksize - (char *) de;
         memcpy (data1, de, len);
         de = (struct ext4_dir_entry_2 *) data1;
         top = data1 + len;
-        while ((char *)(de2=(void*)de+le16_to_cpu(de->rec_len)) < top)
+        while ((char *)(de2 = ext4_next_entry(de)) < top)
                 de = de2;
-        de->rec_len = cpu_to_le16(data1 + blocksize - (char *) de);
+        de->rec_len = ext4_rec_len_to_disk(data1 + blocksize - (char *) de);
         /* Initialize the root; the dot dirents already exist */
         de = (struct ext4_dir_entry_2 *) (&root->dotdot);
-        de->rec_len = cpu_to_le16(blocksize - EXT4_DIR_REC_LEN(2));
+        de->rec_len = ext4_rec_len_to_disk(blocksize - EXT4_DIR_REC_LEN(2));
         memset (&root->info, 0, sizeof(root->info));
         root->info.info_length = sizeof(root->info);
         root->info.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
@@ -1454,7 +1457,7 @@ static int ext4_add_entry (handle_t *handle, struct dentry *dentry,
         int     retval;
         int     dx_fallback=0;
         unsigned blocksize;
-        u32 block, blocks;
+        ext4_lblk_t block, blocks;
 
         sb = dir->i_sb;
         blocksize = sb->s_blocksize;
@@ -1487,7 +1490,7 @@ static int ext4_add_entry (handle_t *handle, struct dentry *dentry,
                 return retval;
         de = (struct ext4_dir_entry_2 *) bh->b_data;
         de->inode = 0;
-        de->rec_len = cpu_to_le16(blocksize);
+        de->rec_len = ext4_rec_len_to_disk(blocksize);
         return add_dirent_to_buf(handle, dentry, inode, de, bh);
 }
 
@@ -1531,7 +1534,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
                        dx_get_count(entries), dx_get_limit(entries)));
         /* Need to split index? */
         if (dx_get_count(entries) == dx_get_limit(entries)) {
-                u32 newblock;
+                ext4_lblk_t newblock;
                 unsigned icount = dx_get_count(entries);
                 int levels = frame - frames;
                 struct dx_entry *entries2;
@@ -1550,7 +1553,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
                         goto cleanup;
                 node2 = (struct dx_node *)(bh2->b_data);
                 entries2 = node2->entries;
-                node2->fake.rec_len = cpu_to_le16(sb->s_blocksize);
+                node2->fake.rec_len = ext4_rec_len_to_disk(sb->s_blocksize);
                 node2->fake.inode = 0;
                 BUFFER_TRACE(frame->bh, "get_write_access");
                 err = ext4_journal_get_write_access(handle, frame->bh);
@@ -1648,9 +1651,9 @@ static int ext4_delete_entry (handle_t *handle,
                         BUFFER_TRACE(bh, "get_write_access");
                         ext4_journal_get_write_access(handle, bh);
                         if (pde)
-                                pde->rec_len =
-                                        cpu_to_le16(le16_to_cpu(pde->rec_len) +
-                                                    le16_to_cpu(de->rec_len));
+                                pde->rec_len = ext4_rec_len_to_disk(
+                                        ext4_rec_len_from_disk(pde->rec_len) +
+                                        ext4_rec_len_from_disk(de->rec_len));
                         else
                                 de->inode = 0;
                         dir->i_version++;
@@ -1658,10 +1661,9 @@ static int ext4_delete_entry (handle_t *handle,
                         ext4_journal_dirty_metadata(handle, bh);
                         return 0;
                 }
-                i += le16_to_cpu(de->rec_len);
+                i += ext4_rec_len_from_disk(de->rec_len);
                 pde = de;
-                de = (struct ext4_dir_entry_2 *)
-                        ((char *) de + le16_to_cpu(de->rec_len));
+                de = ext4_next_entry(de);
         }
         return -ENOENT;
 }
@@ -1824,13 +1826,13 @@ retry:
         de = (struct ext4_dir_entry_2 *) dir_block->b_data;
         de->inode = cpu_to_le32(inode->i_ino);
         de->name_len = 1;
-        de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(de->name_len));
+        de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len));
         strcpy (de->name, ".");
         ext4_set_de_type(dir->i_sb, de, S_IFDIR);
-        de = (struct ext4_dir_entry_2 *)
-                        ((char *) de + le16_to_cpu(de->rec_len));
+        de = ext4_next_entry(de);
         de->inode = cpu_to_le32(dir->i_ino);
-        de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize-EXT4_DIR_REC_LEN(1));
+        de->rec_len = ext4_rec_len_to_disk(inode->i_sb->s_blocksize -
+                                                EXT4_DIR_REC_LEN(1));
         de->name_len = 2;
         strcpy (de->name, "..");
         ext4_set_de_type(dir->i_sb, de, S_IFDIR);
@@ -1882,8 +1884,7 @@ static int empty_dir (struct inode * inode)
                 return 1;
         }
         de = (struct ext4_dir_entry_2 *) bh->b_data;
-        de1 = (struct ext4_dir_entry_2 *)
-                        ((char *) de + le16_to_cpu(de->rec_len));
+        de1 = ext4_next_entry(de);
         if (le32_to_cpu(de->inode) != inode->i_ino ||
                         !le32_to_cpu(de1->inode) ||
                         strcmp (".", de->name) ||
@@ -1894,9 +1895,9 @@ static int empty_dir (struct inode * inode)
                 brelse (bh);
                 return 1;
         }
-        offset = le16_to_cpu(de->rec_len) + le16_to_cpu(de1->rec_len);
-        de = (struct ext4_dir_entry_2 *)
-                        ((char *) de1 + le16_to_cpu(de1->rec_len));
+        offset = ext4_rec_len_from_disk(de->rec_len) +
+                 ext4_rec_len_from_disk(de1->rec_len);
+        de = ext4_next_entry(de1);
         while (offset < inode->i_size ) {
                 if (!bh ||
                         (void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {
@@ -1925,9 +1926,8 @@ static int empty_dir (struct inode * inode)
                         brelse (bh);
                         return 0;
                 }
-                offset += le16_to_cpu(de->rec_len);
-                de = (struct ext4_dir_entry_2 *)
-                                ((char *) de + le16_to_cpu(de->rec_len));
+                offset += ext4_rec_len_from_disk(de->rec_len);
+                de = ext4_next_entry(de);
         }
         brelse (bh);
         return 1;
@@ -2282,8 +2282,7 @@ retry:
 }
 
 #define PARENT_INO(buffer) \
-        ((struct ext4_dir_entry_2 *) ((char *) buffer + \
-        le16_to_cpu(((struct ext4_dir_entry_2 *) buffer)->rec_len)))->inode
+        (ext4_next_entry((struct ext4_dir_entry_2 *)(buffer))->inode)
 
 /*
  * Anybody can rename anything with this: the permission checks are left to the
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index bd8a52bb3999..4fbba60816f4 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -28,7 +28,7 @@ static int verify_group_input(struct super_block *sb,
         struct ext4_super_block *es = sbi->s_es;
         ext4_fsblk_t start = ext4_blocks_count(es);
         ext4_fsblk_t end = start + input->blocks_count;
-        unsigned group = input->group;
+        ext4_group_t group = input->group;
         ext4_fsblk_t itend = input->inode_table + sbi->s_itb_per_group;
         unsigned overhead = ext4_bg_has_super(sb, group) ?
                 (1 + ext4_bg_num_gdb(sb, group) +
@@ -206,7 +206,7 @@ static int setup_new_group_blocks(struct super_block *sb,
         }
 
         if (ext4_bg_has_super(sb, input->group)) {
-                ext4_debug("mark backup superblock %#04lx (+0)\n", start);
+                ext4_debug("mark backup superblock %#04llx (+0)\n", start);
                 ext4_set_bit(0, bh->b_data);
         }
 
@@ -215,7 +215,7 @@ static int setup_new_group_blocks(struct super_block *sb,
              i < gdblocks; i++, block++, bit++) {
                 struct buffer_head *gdb;
 
-                ext4_debug("update backup group %#04lx (+%d)\n", block, bit);
+                ext4_debug("update backup group %#04llx (+%d)\n", block, bit);
 
                 if ((err = extend_or_restart_transaction(handle, 1, bh)))
                         goto exit_bh;
@@ -243,7 +243,7 @@ static int setup_new_group_blocks(struct super_block *sb,
              i < reserved_gdb; i++, block++, bit++) {
                 struct buffer_head *gdb;
 
-                ext4_debug("clear reserved block %#04lx (+%d)\n", block, bit);
+                ext4_debug("clear reserved block %#04llx (+%d)\n", block, bit);
 
                 if ((err = extend_or_restart_transaction(handle, 1, bh)))
                         goto exit_bh;
@@ -256,10 +256,10 @@ static int setup_new_group_blocks(struct super_block *sb,
                 ext4_set_bit(bit, bh->b_data);
                 brelse(gdb);
         }
-        ext4_debug("mark block bitmap %#04x (+%ld)\n", input->block_bitmap,
+        ext4_debug("mark block bitmap %#04llx (+%llu)\n", input->block_bitmap,
                    input->block_bitmap - start);
         ext4_set_bit(input->block_bitmap - start, bh->b_data);
-        ext4_debug("mark inode bitmap %#04x (+%ld)\n", input->inode_bitmap,
+        ext4_debug("mark inode bitmap %#04llx (+%llu)\n", input->inode_bitmap,
                    input->inode_bitmap - start);
         ext4_set_bit(input->inode_bitmap - start, bh->b_data);
 
@@ -268,7 +268,7 @@ static int setup_new_group_blocks(struct super_block *sb,
              i < sbi->s_itb_per_group; i++, bit++, block++) {
                 struct buffer_head *it;
 
-                ext4_debug("clear inode block %#04lx (+%d)\n", block, bit);
+                ext4_debug("clear inode block %#04llx (+%d)\n", block, bit);
 
                 if ((err = extend_or_restart_transaction(handle, 1, bh)))
                         goto exit_bh;
@@ -291,7 +291,7 @@ static int setup_new_group_blocks(struct super_block *sb,
         brelse(bh);
 
         /* Mark unused entries in inode bitmap used */
-        ext4_debug("clear inode bitmap %#04x (+%ld)\n",
+        ext4_debug("clear inode bitmap %#04llx (+%llu)\n",
                    input->inode_bitmap, input->inode_bitmap - start);
         if (IS_ERR(bh = bclean(handle, sb, input->inode_bitmap))) {
                 err = PTR_ERR(bh);
@@ -357,7 +357,7 @@ static int verify_reserved_gdb(struct super_block *sb,
                                struct buffer_head *primary)
 {
         const ext4_fsblk_t blk = primary->b_blocknr;
-        const unsigned long end = EXT4_SB(sb)->s_groups_count;
+        const ext4_group_t end = EXT4_SB(sb)->s_groups_count;
         unsigned three = 1;
         unsigned five = 5;
         unsigned seven = 7;
@@ -656,12 +656,12 @@ static void update_backups(struct super_block *sb,
                            int blk_off, char *data, int size)
 {
         struct ext4_sb_info *sbi = EXT4_SB(sb);
-        const unsigned long last = sbi->s_groups_count;
+        const ext4_group_t last = sbi->s_groups_count;
         const int bpg = EXT4_BLOCKS_PER_GROUP(sb);
         unsigned three = 1;
         unsigned five = 5;
         unsigned seven = 7;
-        unsigned group;
+        ext4_group_t group;
         int rest = sb->s_blocksize - size;
         handle_t *handle;
         int err = 0, err2;
@@ -716,7 +716,7 @@ static void update_backups(struct super_block *sb,
 exit_err:
         if (err) {
                 ext4_warning(sb, __FUNCTION__,
-                             "can't update backup for group %d (err %d), "
+                             "can't update backup for group %lu (err %d), "
                              "forcing fsck on next reboot", group, err);
                 sbi->s_mount_state &= ~EXT4_VALID_FS;
                 sbi->s_es->s_state &= cpu_to_le16(~EXT4_VALID_FS);
@@ -952,7 +952,7 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
                       ext4_fsblk_t n_blocks_count)
 {
         ext4_fsblk_t o_blocks_count;
-        unsigned long o_groups_count;
+        ext4_group_t o_groups_count;
         ext4_grpblk_t last;
         ext4_grpblk_t add;
         struct buffer_head * bh;
@@ -1054,7 +1054,7 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
         ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
         sb->s_dirt = 1;
         unlock_super(sb);
-        ext4_debug("freeing blocks %lu through %llu\n", o_blocks_count,
+        ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count,
                    o_blocks_count + add);
         ext4_free_blocks_sb(handle, sb, o_blocks_count, add, &freed_blocks);
         ext4_debug("freed blocks %llu through %llu\n", o_blocks_count,
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1ca0f546c466..055a0cd0168e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -373,6 +373,66 @@ void ext4_update_dynamic_rev(struct super_block *sb)
          */
 }
 
+int ext4_update_compat_feature(handle_t *handle,
+                                        struct super_block *sb, __u32 compat)
+{
+        int err = 0;
+        if (!EXT4_HAS_COMPAT_FEATURE(sb, compat)) {
+                err = ext4_journal_get_write_access(handle,
+                                EXT4_SB(sb)->s_sbh);
+                if (err)
+                        return err;
+                EXT4_SET_COMPAT_FEATURE(sb, compat);
+                sb->s_dirt = 1;
+                handle->h_sync = 1;
+                BUFFER_TRACE(EXT4_SB(sb)->s_sbh,
+                                        "call ext4_journal_dirty_met adata");
+                err = ext4_journal_dirty_metadata(handle,
+                                EXT4_SB(sb)->s_sbh);
+        }
+        return err;
+}
+
+int ext4_update_rocompat_feature(handle_t *handle,
+                                        struct super_block *sb, __u32 rocompat)
+{
+        int err = 0;
+        if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, rocompat)) {
+                err = ext4_journal_get_write_access(handle,
+                                EXT4_SB(sb)->s_sbh);
+                if (err)
+                        return err;
+                EXT4_SET_RO_COMPAT_FEATURE(sb, rocompat);
+                sb->s_dirt = 1;
+                handle->h_sync = 1;
+                BUFFER_TRACE(EXT4_SB(sb)->s_sbh,
+                                        "call ext4_journal_dirty_met adata");
+                err = ext4_journal_dirty_metadata(handle,
+                                EXT4_SB(sb)->s_sbh);
+        }
+        return err;
+}
+
+int ext4_update_incompat_feature(handle_t *handle,
+                                        struct super_block *sb, __u32 incompat)
+{
+        int err = 0;
+        if (!EXT4_HAS_INCOMPAT_FEATURE(sb, incompat)) {
+                err = ext4_journal_get_write_access(handle,
+                                EXT4_SB(sb)->s_sbh);
+                if (err)
+                        return err;
+                EXT4_SET_INCOMPAT_FEATURE(sb, incompat);
+                sb->s_dirt = 1;
+                handle->h_sync = 1;
+                BUFFER_TRACE(EXT4_SB(sb)->s_sbh,
+                                        "call ext4_journal_dirty_met adata");
+                err = ext4_journal_dirty_metadata(handle,
+                                EXT4_SB(sb)->s_sbh);
+        }
+        return err;
+}
+
 /*
  * Open the external journal device
  */
@@ -443,6 +503,7 @@ static void ext4_put_super (struct super_block * sb)
         struct ext4_super_block *es = sbi->s_es;
         int i;
 
+        ext4_mb_release(sb);
         ext4_ext_release(sb);
         ext4_xattr_put_super(sb);
         jbd2_journal_destroy(sbi->s_journal);
@@ -509,6 +570,8 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
         ei->i_block_alloc_info = NULL;
         ei->vfs_inode.i_version = 1;
         memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache));
+        INIT_LIST_HEAD(&ei->i_prealloc_list);
+        spin_lock_init(&ei->i_prealloc_lock);
         return &ei->vfs_inode;
 }
 
@@ -533,7 +596,7 @@ static void init_once(struct kmem_cache *cachep, void *foo)
 #ifdef CONFIG_EXT4DEV_FS_XATTR
         init_rwsem(&ei->xattr_sem);
 #endif
-        mutex_init(&ei->truncate_mutex);
+        init_rwsem(&ei->i_data_sem);
         inode_init_once(&ei->vfs_inode);
 }
 
@@ -605,18 +668,20 @@ static inline void ext4_show_quota_options(struct seq_file *seq, struct super_bl
  */
 static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
 {
+        int def_errors;
+        unsigned long def_mount_opts;
         struct super_block *sb = vfs->mnt_sb;
         struct ext4_sb_info *sbi = EXT4_SB(sb);
         struct ext4_super_block *es = sbi->s_es;
-        unsigned long def_mount_opts;
 
         def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
+        def_errors     = le16_to_cpu(es->s_errors);
 
         if (sbi->s_sb_block != 1)
                 seq_printf(seq, ",sb=%llu", sbi->s_sb_block);
         if (test_opt(sb, MINIX_DF))
                 seq_puts(seq, ",minixdf");
-        if (test_opt(sb, GRPID))
+        if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS))
                 seq_puts(seq, ",grpid");
         if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS))
                 seq_puts(seq, ",nogrpid");
@@ -628,34 +693,33 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
             le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) {
                 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
         }
-        if (test_opt(sb, ERRORS_CONT)) {
-                int def_errors = le16_to_cpu(es->s_errors);
-
+        if (test_opt(sb, ERRORS_RO)) {
                 if (def_errors == EXT4_ERRORS_PANIC ||
-                    def_errors == EXT4_ERRORS_RO) {
-                        seq_puts(seq, ",errors=continue");
+                    def_errors == EXT4_ERRORS_CONTINUE) {
+                        seq_puts(seq, ",errors=remount-ro");
                 }
         }
-        if (test_opt(sb, ERRORS_RO))
-                seq_puts(seq, ",errors=remount-ro");
-        if (test_opt(sb, ERRORS_PANIC))
+        if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE)
+                seq_puts(seq, ",errors=continue");
+        if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC)
                 seq_puts(seq, ",errors=panic");
-        if (test_opt(sb, NO_UID32))
+        if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16))
                 seq_puts(seq, ",nouid32");
-        if (test_opt(sb, DEBUG))
+        if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG))
                 seq_puts(seq, ",debug");
         if (test_opt(sb, OLDALLOC))
                 seq_puts(seq, ",oldalloc");
-#ifdef CONFIG_EXT4_FS_XATTR
-        if (test_opt(sb, XATTR_USER))
+#ifdef CONFIG_EXT4DEV_FS_XATTR
+        if (test_opt(sb, XATTR_USER) &&
+                !(def_mount_opts & EXT4_DEFM_XATTR_USER))
                 seq_puts(seq, ",user_xattr");
         if (!test_opt(sb, XATTR_USER) &&
             (def_mount_opts & EXT4_DEFM_XATTR_USER)) {
                 seq_puts(seq, ",nouser_xattr");
         }
 #endif
-#ifdef CONFIG_EXT4_FS_POSIX_ACL
-        if (test_opt(sb, POSIX_ACL))
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+        if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL))
                 seq_puts(seq, ",acl");
         if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL))
                 seq_puts(seq, ",noacl");
@@ -672,7 +736,17 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
                 seq_puts(seq, ",nobh");
         if (!test_opt(sb, EXTENTS))
                 seq_puts(seq, ",noextents");
+        if (!test_opt(sb, MBALLOC))
+                seq_puts(seq, ",nomballoc");
+        if (test_opt(sb, I_VERSION))
+                seq_puts(seq, ",i_version");
 
+        if (sbi->s_stripe)
+                seq_printf(seq, ",stripe=%lu", sbi->s_stripe);
+        /*
+         * journal mode get enabled in different ways
+         * So just print the value even if we didn't specify it
+         */
         if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
                 seq_puts(seq, ",data=journal");
         else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
@@ -681,7 +755,6 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
                 seq_puts(seq, ",data=writeback");
 
         ext4_show_quota_options(seq, sb);
-
         return 0;
 }
 
@@ -809,11 +882,13 @@ enum {
         Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
         Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
         Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
+        Opt_journal_checksum, Opt_journal_async_commit,
         Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
         Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
         Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
         Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
-        Opt_grpquota, Opt_extents, Opt_noextents,
+        Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version,
+        Opt_mballoc, Opt_nomballoc, Opt_stripe,
 };
 
 static match_table_t tokens = {
@@ -848,6 +923,8 @@ static match_table_t tokens = {
         {Opt_journal_update, "journal=update"},
         {Opt_journal_inum, "journal=%u"},
         {Opt_journal_dev, "journal_dev=%u"},
+        {Opt_journal_checksum, "journal_checksum"},
+        {Opt_journal_async_commit, "journal_async_commit"},
         {Opt_abort, "abort"},
         {Opt_data_journal, "data=journal"},
         {Opt_data_ordered, "data=ordered"},
@@ -865,6 +942,10 @@ static match_table_t tokens = {
         {Opt_barrier, "barrier=%u"},
         {Opt_extents, "extents"},
         {Opt_noextents, "noextents"},
+        {Opt_i_version, "i_version"},
+        {Opt_mballoc, "mballoc"},
+        {Opt_nomballoc, "nomballoc"},
+        {Opt_stripe, "stripe=%u"},
         {Opt_err, NULL},
         {Opt_resize, "resize"},
 };
@@ -1035,6 +1116,13 @@ static int parse_options (char *options, struct super_block *sb,
                                 return 0;
                         *journal_devnum = option;
                         break;
+                case Opt_journal_checksum:
+                        set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM);
+                        break;
+                case Opt_journal_async_commit:
+                        set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT);
+                        set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM);
+                        break;
                 case Opt_noload:
                         set_opt (sbi->s_mount_opt, NOLOAD);
                         break;
@@ -1203,6 +1291,23 @@ clear_qf_name:
                 case Opt_noextents:
                         clear_opt (sbi->s_mount_opt, EXTENTS);
                         break;
+                case Opt_i_version:
+                        set_opt(sbi->s_mount_opt, I_VERSION);
+                        sb->s_flags |= MS_I_VERSION;
+                        break;
+                case Opt_mballoc:
+                        set_opt(sbi->s_mount_opt, MBALLOC);
+                        break;
+                case Opt_nomballoc:
+                        clear_opt(sbi->s_mount_opt, MBALLOC);
+                        break;
+                case Opt_stripe:
+                        if (match_int(&args[0], &option))
+                                return 0;
+                        if (option < 0)
+                                return 0;
+                        sbi->s_stripe = option;
+                        break;
                 default:
                         printk (KERN_ERR
                                 "EXT4-fs: Unrecognized mount option \"%s\" "
@@ -1364,7 +1469,7 @@ static int ext4_check_descriptors (struct super_block * sb)
         struct ext4_group_desc * gdp = NULL;
         int desc_block = 0;
         int flexbg_flag = 0;
-        int i;
+        ext4_group_t i;
 
         if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG))
                 flexbg_flag = 1;
@@ -1386,7 +1491,7 @@ static int ext4_check_descriptors (struct super_block * sb)
                 if (block_bitmap < first_block || block_bitmap > last_block)
                 {
                         ext4_error (sb, "ext4_check_descriptors",
-                                    "Block bitmap for group %d"
+                                    "Block bitmap for group %lu"
                                     " not in group (block %llu)!",
                                     i, block_bitmap);
                         return 0;
@@ -1395,7 +1500,7 @@ static int ext4_check_descriptors (struct super_block * sb)
                 if (inode_bitmap < first_block || inode_bitmap > last_block)
                 {
                         ext4_error (sb, "ext4_check_descriptors",
-                                    "Inode bitmap for group %d"
+                                    "Inode bitmap for group %lu"
                                     " not in group (block %llu)!",
                                     i, inode_bitmap);
                         return 0;
@@ -1405,17 +1510,16 @@ static int ext4_check_descriptors (struct super_block * sb)
                     inode_table + sbi->s_itb_per_group - 1 > last_block)
                 {
                         ext4_error (sb, "ext4_check_descriptors",
-                                    "Inode table for group %d"
+                                    "Inode table for group %lu"
                                     " not in group (block %llu)!",
                                     i, inode_table);
                         return 0;
                 }
                 if (!ext4_group_desc_csum_verify(sbi, i, gdp)) {
                         ext4_error(sb, __FUNCTION__,
-                                   "Checksum for group %d failed (%u!=%u)\n", i,
-                                   le16_to_cpu(ext4_group_desc_csum(sbi, i,
-                                                                    gdp)),
-                                   le16_to_cpu(gdp->bg_checksum));
+                                   "Checksum for group %lu failed (%u!=%u)\n",
+                                    i, le16_to_cpu(ext4_group_desc_csum(sbi, i,
+                                    gdp)), le16_to_cpu(gdp->bg_checksum));
                         return 0;
                 }
                 if (!flexbg_flag)
@@ -1429,7 +1533,6 @@ static int ext4_check_descriptors (struct super_block * sb)
         return 1;
 }
 
-
 /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at
  * the superblock) which were deleted from all directories, but held open by
  * a process at the time of a crash.  We walk the list and try to delete these
@@ -1542,20 +1645,95 @@ static void ext4_orphan_cleanup (struct super_block * sb,
 #endif
         sb->s_flags = s_flags; /* Restore MS_RDONLY status */
 }
+/*
+ * Maximal extent format file size.
+ * Resulting logical blkno at s_maxbytes must fit in our on-disk
+ * extent format containers, within a sector_t, and within i_blocks
+ * in the vfs.  ext4 inode has 48 bits of i_block in fsblock units,
+ * so that won't be a limiting factor.
+ *
+ * Note, this does *not* consider any metadata overhead for vfs i_blocks.
+ */
+static loff_t ext4_max_size(int blkbits)
+{
+        loff_t res;
+        loff_t upper_limit = MAX_LFS_FILESIZE;
+
+        /* small i_blocks in vfs inode? */
+        if (sizeof(blkcnt_t) < sizeof(u64)) {
+                /*
+                 * CONFIG_LSF is not enabled implies the inode
+                 * i_block represent total blocks in 512 bytes
+                 * 32 == size of vfs inode i_blocks * 8
+                 */
+                upper_limit = (1LL << 32) - 1;
+
+                /* total blocks in file system block size */
+                upper_limit >>= (blkbits - 9);
+                upper_limit <<= blkbits;
+        }
+
+        /* 32-bit extent-start container, ee_block */
+        res = 1LL << 32;
+        res <<= blkbits;
+        res -= 1;
+
+        /* Sanity check against vm- & vfs- imposed limits */
+        if (res > upper_limit)
+                res = upper_limit;
+
+        return res;
+}
 
 /*
- * Maximal file size.  There is a direct, and {,double-,triple-}indirect
- * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
- * We need to be 1 filesystem block less than the 2^32 sector limit.
+ * Maximal bitmap file size.  There is a direct, and {,double-,triple-}indirect
+ * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks.
+ * We need to be 1 filesystem block less than the 2^48 sector limit.
  */
-static loff_t ext4_max_size(int bits)
+static loff_t ext4_max_bitmap_size(int bits)
 {
         loff_t res = EXT4_NDIR_BLOCKS;
-        /* This constant is calculated to be the largest file size for a
-         * dense, 4k-blocksize file such that the total number of
+        int meta_blocks;
+        loff_t upper_limit;
+        /* This is calculated to be the largest file size for a
+         * dense, bitmapped file such that the total number of
          * sectors in the file, including data and all indirect blocks,
-         * does not exceed 2^32. */
-        const loff_t upper_limit = 0x1ff7fffd000LL;
+         * does not exceed 2^48 -1
+         * __u32 i_blocks_lo and _u16 i_blocks_high representing the
+         * total number of  512 bytes blocks of the file
+         */
+
+        if (sizeof(blkcnt_t) < sizeof(u64)) {
+                /*
+                 * CONFIG_LSF is not enabled implies the inode
+                 * i_block represent total blocks in 512 bytes
+                 * 32 == size of vfs inode i_blocks * 8
+                 */
+                upper_limit = (1LL << 32) - 1;
+
+                /* total blocks in file system block size */
+                upper_limit >>= (bits - 9);
+
+        } else {
+                /*
+                 * We use 48 bit ext4_inode i_blocks
+                 * With EXT4_HUGE_FILE_FL set the i_blocks
+                 * represent total number of blocks in
+                 * file system block size
+                 */
+                upper_limit = (1LL << 48) - 1;
+
+        }
+
+        /* indirect blocks */
+        meta_blocks = 1;
+        /* double indirect blocks */
+        meta_blocks += 1 + (1LL << (bits-2));
+        /* tripple indirect blocks */
+        meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
+
+        upper_limit -= meta_blocks;
+        upper_limit <<= bits;
 
         res += 1LL << (bits-2);
         res += 1LL << (2*(bits-2));
@@ -1563,6 +1741,10 @@ static loff_t ext4_max_size(int bits)
         res <<= bits;
         if (res > upper_limit)
                 res = upper_limit;
+
+        if (res > MAX_LFS_FILESIZE)
+                res = MAX_LFS_FILESIZE;
+
         return res;
 }
 
@@ -1570,7 +1752,7 @@ static ext4_fsblk_t descriptor_loc(struct super_block *sb,
                                 ext4_fsblk_t logical_sb_block, int nr)
 {
         struct ext4_sb_info *sbi = EXT4_SB(sb);
-        unsigned long bg, first_meta_bg;
+        ext4_group_t bg, first_meta_bg;
         int has_super = 0;
 
         first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
@@ -1584,8 +1766,39 @@ static ext4_fsblk_t descriptor_loc(struct super_block *sb,
         return (has_super + ext4_group_first_block_no(sb, bg));
 }
 
+/**
+ * ext4_get_stripe_size: Get the stripe size.
+ * @sbi: In memory super block info
+ *
+ * If we have specified it via mount option, then
+ * use the mount option value. If the value specified at mount time is
+ * greater than the blocks per group use the super block value.
+ * If the super block value is greater than blocks per group return 0.
+ * Allocator needs it be less than blocks per group.
+ *
+ */
+static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi)
+{
+        unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride);
+        unsigned long stripe_width =
+                        le32_to_cpu(sbi->s_es->s_raid_stripe_width);
+
+        if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group)
+                return sbi->s_stripe;
+
+        if (stripe_width <= sbi->s_blocks_per_group)
+                return stripe_width;
+
+        if (stride <= sbi->s_blocks_per_group)
+                return stride;
+
+        return 0;
+}
 
 static int ext4_fill_super (struct super_block *sb, void *data, int silent)
+                                __releases(kernel_sem)
+                                __acquires(kernel_sem)
+
 {
         struct buffer_head * bh;
         struct ext4_super_block *es = NULL;
@@ -1599,7 +1812,6 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
         unsigned long def_mount_opts;
         struct inode *root;
         int blocksize;
-        int hblock;
         int db_count;
         int i;
         int needs_recovery;
@@ -1624,6 +1836,11 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                 goto out_fail;
         }
 
+        if (!sb_set_blocksize(sb, blocksize)) {
+                printk(KERN_ERR "EXT4-fs: bad blocksize %d.\n", blocksize);
+                goto out_fail;
+        }
+
         /*
          * The ext4 superblock will not be buffer aligned for other than 1kB
          * block sizes.  We need to calculate the offset from buffer start.
@@ -1674,10 +1891,10 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 
         if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC)
                 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
-        else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_RO)
-                set_opt(sbi->s_mount_opt, ERRORS_RO);
-        else
+        else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE)
                 set_opt(sbi->s_mount_opt, ERRORS_CONT);
+        else
+                set_opt(sbi->s_mount_opt, ERRORS_RO);
 
         sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
         sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
@@ -1689,6 +1906,11 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
          * User -o noextents to turn it off
          */
         set_opt(sbi->s_mount_opt, EXTENTS);
+        /*
+         * turn on mballoc feature by default in ext4 filesystem
+         * User -o nomballoc to turn it off
+         */
+        set_opt(sbi->s_mount_opt, MBALLOC);
 
         if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
                             NULL, 0))
@@ -1723,6 +1945,19 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                        sb->s_id, le32_to_cpu(features));
                 goto failed_mount;
         }
+        if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
+                /*
+                 * Large file size enabled file system can only be
+                 * mount if kernel is build with CONFIG_LSF
+                 */
+                if (sizeof(root->i_blocks) < sizeof(u64) &&
+                                !(sb->s_flags & MS_RDONLY)) {
+                        printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge "
+                                        "files cannot be mounted read-write "
+                                        "without CONFIG_LSF.\n", sb->s_id);
+                        goto failed_mount;
+                }
+        }
         blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
 
         if (blocksize < EXT4_MIN_BLOCK_SIZE ||
@@ -1733,20 +1968,16 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                 goto failed_mount;
         }
 
-        hblock = bdev_hardsect_size(sb->s_bdev);
         if (sb->s_blocksize != blocksize) {
-                /*
-                 * Make sure the blocksize for the filesystem is larger
-                 * than the hardware sectorsize for the machine.
-                 */
-                if (blocksize < hblock) {
-                        printk(KERN_ERR "EXT4-fs: blocksize %d too small for "
-                               "device blocksize %d.\n", blocksize, hblock);
+
+                /* Validate the filesystem blocksize */
+                if (!sb_set_blocksize(sb, blocksize)) {
+                        printk(KERN_ERR "EXT4-fs: bad block size %d.\n",
+                                        blocksize);
                         goto failed_mount;
                 }
 
                 brelse (bh);
-                sb_set_blocksize(sb, blocksize);
                 logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
                 offset = do_div(logical_sb_block, blocksize);
                 bh = sb_bread(sb, logical_sb_block);
@@ -1764,6 +1995,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                 }
         }
 
+        sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits);
         sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits);
 
         if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {
@@ -1838,6 +2070,17 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 
         if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
                 goto cantfind_ext4;
+
+        /* ensure blocks_count calculation below doesn't sign-extend */
+        if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) <
+            le32_to_cpu(es->s_first_data_block) + 1) {
+                printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, "
+                       "first data block %u, blocks per group %lu\n",
+                        ext4_blocks_count(es),
+                        le32_to_cpu(es->s_first_data_block),
+                        EXT4_BLOCKS_PER_GROUP(sb));
+                goto failed_mount;
+        }
         blocks_count = (ext4_blocks_count(es) -
                         le32_to_cpu(es->s_first_data_block) +
                         EXT4_BLOCKS_PER_GROUP(sb) - 1);
@@ -1900,6 +2143,8 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
         sbi->s_rsv_window_head.rsv_goal_size = 0;
         ext4_rsv_window_add(sb, &sbi->s_rsv_window_head);
 
+        sbi->s_stripe = ext4_get_stripe_size(sbi);
+
         /*
          * set up enough so that it can read an inode
          */
@@ -1944,6 +2189,21 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                 goto failed_mount4;
         }
 
+        if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
+                jbd2_journal_set_features(sbi->s_journal,
+                                JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+                                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+        } else if (test_opt(sb, JOURNAL_CHECKSUM)) {
+                jbd2_journal_set_features(sbi->s_journal,
+                                JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0);
+                jbd2_journal_clear_features(sbi->s_journal, 0, 0,
+                                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+        } else {
+                jbd2_journal_clear_features(sbi->s_journal,
+                                JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+                                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+        }
+
         /* We have now updated the journal if required, so we can
          * validate the data journaling mode. */
         switch (test_opt(sb, DATA_FLAGS)) {
@@ -2044,6 +2304,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                 "writeback");
 
         ext4_ext_init(sb);
+        ext4_mb_init(sb, needs_recovery);
 
         lock_kernel();
         return 0;
@@ -2673,7 +2934,7 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
         if (test_opt(sb, MINIX_DF)) {
                 sbi->s_overhead_last = 0;
         } else if (sbi->s_blocks_last != ext4_blocks_count(es)) {
-                unsigned long ngroups = sbi->s_groups_count, i;
+                ext4_group_t ngroups = sbi->s_groups_count, i;
                 ext4_fsblk_t overhead = 0;
                 smp_rmb();
 
@@ -2909,7 +3170,7 @@ static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
                                size_t len, loff_t off)
 {
         struct inode *inode = sb_dqopt(sb)->files[type];
-        sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
+        ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
         int err = 0;
         int offset = off & (sb->s_blocksize - 1);
         int tocopy;
@@ -2947,7 +3208,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
                                 const char *data, size_t len, loff_t off)
 {
         struct inode *inode = sb_dqopt(sb)->files[type];
-        sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
+        ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
         int err = 0;
         int offset = off & (sb->s_blocksize - 1);
         int tocopy;
@@ -3002,7 +3263,6 @@ out:
                 i_size_write(inode, off+len-towrite);
                 EXT4_I(inode)->i_disksize = inode->i_size;
         }
-        inode->i_version++;
         inode->i_mtime = inode->i_ctime = CURRENT_TIME;
         ext4_mark_inode_dirty(handle, inode);
         mutex_unlock(&inode->i_mutex);
@@ -3027,9 +3287,15 @@ static struct file_system_type ext4dev_fs_type = {
 
 static int __init init_ext4_fs(void)
 {
-        int err = init_ext4_xattr();
+        int err;
+
+        err = init_ext4_mballoc();
         if (err)
                 return err;
+
+        err = init_ext4_xattr();
+        if (err)
+                goto out2;
         err = init_inodecache();
         if (err)
                 goto out1;
@@ -3041,6 +3307,8 @@ out:
         destroy_inodecache();
 out1:
         exit_ext4_xattr();
+out2:
+        exit_ext4_mballoc();
         return err;
 }
 
@@ -3049,6 +3317,7 @@ static void __exit exit_ext4_fs(void)
         unregister_filesystem(&ext4dev_fs_type);
         destroy_inodecache();
         exit_ext4_xattr();
+        exit_ext4_mballoc();
 }
 
 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 86387302c2a9..d7962139c010 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -480,7 +480,7 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
                 ea_bdebug(bh, "refcount now=0; freeing");
                 if (ce)
                         mb_cache_entry_free(ce);
-                ext4_free_blocks(handle, inode, bh->b_blocknr, 1);
+                ext4_free_blocks(handle, inode, bh->b_blocknr, 1, 1);
                 get_bh(bh);
                 ext4_forget(handle, 1, inode, bh, bh->b_blocknr);
         } else {
@@ -821,7 +821,7 @@ inserted:
                         new_bh = sb_getblk(sb, block);
                         if (!new_bh) {
 getblk_failed:
-                                ext4_free_blocks(handle, inode, block, 1);
+                                ext4_free_blocks(handle, inode, block, 1, 1);
                                 error = -EIO;
                                 goto cleanup;
                         }
diff --git a/fs/inode.c b/fs/inode.c
index ed35383d0b6c..276ffd6b6fdd 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1276,6 +1276,11 @@ void file_update_time(struct file *file)
                 sync_it = 1;
         }
 
+        if (IS_I_VERSION(inode)) {
+                inode_inc_iversion(inode);
+                sync_it = 1;
+        }
+
         if (sync_it)
                 mark_inode_dirty_sync(inode);
 }
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 3fccde7ba008..1b7f282c1ae9 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -232,7 +232,8 @@ __flush_batch(journal_t *journal, struct buffer_head **bhs, int *batch_count)
  * Called under jbd_lock_bh_state(jh2bh(jh)), and drops it
  */
 static int __process_buffer(journal_t *journal, struct journal_head *jh,
-                        struct buffer_head **bhs, int *batch_count)
+                        struct buffer_head **bhs, int *batch_count,
+                        transaction_t *transaction)
 {
         struct buffer_head *bh = jh2bh(jh);
         int ret = 0;
@@ -250,6 +251,7 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
                 transaction_t *t = jh->b_transaction;
                 tid_t tid = t->t_tid;
 
+                transaction->t_chp_stats.cs_forced_to_close++;
                 spin_unlock(&journal->j_list_lock);
                 jbd_unlock_bh_state(bh);
                 jbd2_log_start_commit(journal, tid);
@@ -279,6 +281,7 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
                 bhs[*batch_count] = bh;
                 __buffer_relink_io(jh);
                 jbd_unlock_bh_state(bh);
+                transaction->t_chp_stats.cs_written++;
                 (*batch_count)++;
                 if (*batch_count == NR_BATCH) {
                         spin_unlock(&journal->j_list_lock);
@@ -322,6 +325,8 @@ int jbd2_log_do_checkpoint(journal_t *journal)
         if (!journal->j_checkpoint_transactions)
                 goto out;
         transaction = journal->j_checkpoint_transactions;
+        if (transaction->t_chp_stats.cs_chp_time == 0)
+                transaction->t_chp_stats.cs_chp_time = jiffies;
         this_tid = transaction->t_tid;
 restart:
         /*
@@ -346,7 +351,8 @@ restart:
                                 retry = 1;
                                 break;
                         }
-                        retry = __process_buffer(journal, jh, bhs,&batch_count);
+                        retry = __process_buffer(journal, jh, bhs, &batch_count,
+                                                 transaction);
                         if (!retry && lock_need_resched(&journal->j_list_lock)){
                                 spin_unlock(&journal->j_list_lock);
                                 retry = 1;
@@ -602,15 +608,15 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
 
         /*
          * There is one special case to worry about: if we have just pulled the
-         * buffer off a committing transaction's forget list, then even if the
-         * checkpoint list is empty, the transaction obviously cannot be
-         * dropped!
+         * buffer off a running or committing transaction's checkpoing list,
+         * then even if the checkpoint list is empty, the transaction obviously
+         * cannot be dropped!
          *
-         * The locking here around j_committing_transaction is a bit sleazy.
+         * The locking here around t_state is a bit sleazy.
          * See the comment at the end of jbd2_journal_commit_transaction().
          */
-        if (transaction == journal->j_committing_transaction) {
-                JBUFFER_TRACE(jh, "belongs to committing transaction");
+        if (transaction->t_state != T_FINISHED) {
+                JBUFFER_TRACE(jh, "belongs to running/committing transaction");
                 goto out;
         }
 
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 6986f334c643..da8d0eb3b7b9 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -20,6 +20,8 @@
 #include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/pagemap.h>
+#include <linux/jiffies.h>
+#include <linux/crc32.h>
 
 /*
  * Default IO end handler for temporary BJ_IO buffer_heads.
@@ -92,19 +94,23 @@ static int inverted_lock(journal_t *journal, struct buffer_head *bh)
         return 1;
 }
 
-/* Done it all: now write the commit record.  We should have
+/*
+ * Done it all: now submit the commit record.  We should have
  * cleaned up our previous buffers by now, so if we are in abort
  * mode we can now just skip the rest of the journal write
  * entirely.
  *
  * Returns 1 if the journal needs to be aborted or 0 on success
  */
-static int journal_write_commit_record(journal_t *journal,
-                                        transaction_t *commit_transaction)
+static int journal_submit_commit_record(journal_t *journal,
+                                        transaction_t *commit_transaction,
+                                        struct buffer_head **cbh,
+                                        __u32 crc32_sum)
 {
         struct journal_head *descriptor;
+        struct commit_header *tmp;
         struct buffer_head *bh;
-        int i, ret;
+        int ret;
         int barrier_done = 0;
 
         if (is_journal_aborted(journal))
@@ -116,21 +122,33 @@ static int journal_write_commit_record(journal_t *journal,
 
         bh = jh2bh(descriptor);
 
-        /* AKPM: buglet - add `i' to tmp! */
-        for (i = 0; i < bh->b_size; i += 512) {
-                journal_header_t *tmp = (journal_header_t*)bh->b_data;
-                tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER);
-                tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK);
-                tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid);
+        tmp = (struct commit_header *)bh->b_data;
+        tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER);
+        tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK);
+        tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid);
+
+        if (JBD2_HAS_COMPAT_FEATURE(journal,
+                                    JBD2_FEATURE_COMPAT_CHECKSUM)) {
+                tmp->h_chksum_type      = JBD2_CRC32_CHKSUM;
+                tmp->h_chksum_size      = JBD2_CRC32_CHKSUM_SIZE;
+                tmp->h_chksum[0]        = cpu_to_be32(crc32_sum);
         }
 
-        JBUFFER_TRACE(descriptor, "write commit block");
+        JBUFFER_TRACE(descriptor, "submit commit block");
+        lock_buffer(bh);
+
         set_buffer_dirty(bh);
-        if (journal->j_flags & JBD2_BARRIER) {
+        set_buffer_uptodate(bh);
+        bh->b_end_io = journal_end_buffer_io_sync;
+
+        if (journal->j_flags & JBD2_BARRIER &&
+                !JBD2_HAS_COMPAT_FEATURE(journal,
+                                         JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) {
                 set_buffer_ordered(bh);
                 barrier_done = 1;
         }
-        ret = sync_dirty_buffer(bh);
+        ret = submit_bh(WRITE, bh);
+
         /* is it possible for another commit to fail at roughly
          * the same time as this one?  If so, we don't want to
          * trust the barrier flag in the super, but instead want
@@ -151,14 +169,72 @@ static int journal_write_commit_record(journal_t *journal,
                 clear_buffer_ordered(bh);
                 set_buffer_uptodate(bh);
                 set_buffer_dirty(bh);
-                ret = sync_dirty_buffer(bh);
+                ret = submit_bh(WRITE, bh);
         }
-        put_bh(bh);             /* One for getblk() */
-        jbd2_journal_put_journal_head(descriptor);
+        *cbh = bh;
+        return ret;
+}
+
+/*
+ * This function along with journal_submit_commit_record
+ * allows to write the commit record asynchronously.
+ */
+static int journal_wait_on_commit_record(struct buffer_head *bh)
+{
+        int ret = 0;
+
+        clear_buffer_dirty(bh);
+        wait_on_buffer(bh);
+
+        if (unlikely(!buffer_uptodate(bh)))
+                ret = -EIO;
+        put_bh(bh);            /* One for getblk() */
+        jbd2_journal_put_journal_head(bh2jh(bh));
 
-        return (ret == -EIO);
+        return ret;
 }
 
+/*
+ * Wait for all submitted IO to complete.
+ */
+static int journal_wait_on_locked_list(journal_t *journal,
+                                       transaction_t *commit_transaction)
+{
+        int ret = 0;
+        struct journal_head *jh;
+
+        while (commit_transaction->t_locked_list) {
+                struct buffer_head *bh;
+
+                jh = commit_transaction->t_locked_list->b_tprev;
+                bh = jh2bh(jh);
+                get_bh(bh);
+                if (buffer_locked(bh)) {
+                        spin_unlock(&journal->j_list_lock);
+                        wait_on_buffer(bh);
+                        if (unlikely(!buffer_uptodate(bh)))
+                                ret = -EIO;
+                        spin_lock(&journal->j_list_lock);
+                }
+                if (!inverted_lock(journal, bh)) {
+                        put_bh(bh);
+                        spin_lock(&journal->j_list_lock);
+                        continue;
+                }
+                if (buffer_jbd(bh) && jh->b_jlist == BJ_Locked) {
+                        __jbd2_journal_unfile_buffer(jh);
+                        jbd_unlock_bh_state(bh);
+                        jbd2_journal_remove_journal_head(bh);
+                        put_bh(bh);
+                } else {
+                        jbd_unlock_bh_state(bh);
+                }
+                put_bh(bh);
+                cond_resched_lock(&journal->j_list_lock);
+        }
+        return ret;
+  }
+
 static void journal_do_submit_data(struct buffer_head **wbuf, int bufs)
 {
         int i;
@@ -274,7 +350,21 @@ write_out_data:
         journal_do_submit_data(wbuf, bufs);
 }
 
-static inline void write_tag_block(int tag_bytes, journal_block_tag_t *tag,
+static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh)
+{
+        struct page *page = bh->b_page;
+        char *addr;
+        __u32 checksum;
+
+        addr = kmap_atomic(page, KM_USER0);
+        checksum = crc32_be(crc32_sum,
+                (void *)(addr + offset_in_page(bh->b_data)), bh->b_size);
+        kunmap_atomic(addr, KM_USER0);
+
+        return checksum;
+}
+
+static void write_tag_block(int tag_bytes, journal_block_tag_t *tag,
                                    unsigned long long block)
 {
         tag->t_blocknr = cpu_to_be32(block & (u32)~0);
@@ -290,6 +380,7 @@ static inline void write_tag_block(int tag_bytes, journal_block_tag_t *tag,
  */
 void jbd2_journal_commit_transaction(journal_t *journal)
 {
+        struct transaction_stats_s stats;
         transaction_t *commit_transaction;
         struct journal_head *jh, *new_jh, *descriptor;
         struct buffer_head **wbuf = journal->j_wbuf;
@@ -305,6 +396,8 @@ void jbd2_journal_commit_transaction(journal_t *journal)
         int tag_flag;
         int i;
         int tag_bytes = journal_tag_bytes(journal);
+        struct buffer_head *cbh = NULL; /* For transactional checksums */
+        __u32 crc32_sum = ~0;
 
         /*
          * First job: lock down the current transaction and wait for
@@ -337,6 +430,11 @@ void jbd2_journal_commit_transaction(journal_t *journal)
         spin_lock(&journal->j_state_lock);
         commit_transaction->t_state = T_LOCKED;
 
+        stats.u.run.rs_wait = commit_transaction->t_max_wait;
+        stats.u.run.rs_locked = jiffies;
+        stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start,
+                                                stats.u.run.rs_locked);
+
         spin_lock(&commit_transaction->t_handle_lock);
         while (commit_transaction->t_updates) {
                 DEFINE_WAIT(wait);
@@ -407,6 +505,10 @@ void jbd2_journal_commit_transaction(journal_t *journal)
          */
         jbd2_journal_switch_revoke_table(journal);
 
+        stats.u.run.rs_flushing = jiffies;
+        stats.u.run.rs_locked = jbd2_time_diff(stats.u.run.rs_locked,
+                                               stats.u.run.rs_flushing);
+
         commit_transaction->t_state = T_FLUSH;
         journal->j_committing_transaction = commit_transaction;
         journal->j_running_transaction = NULL;
@@ -440,38 +542,15 @@ void jbd2_journal_commit_transaction(journal_t *journal)
         journal_submit_data_buffers(journal, commit_transaction);
 
         /*
-         * Wait for all previously submitted IO to complete.
+         * Wait for all previously submitted IO to complete if commit
+         * record is to be written synchronously.
          */
         spin_lock(&journal->j_list_lock);
-        while (commit_transaction->t_locked_list) {
-                struct buffer_head *bh;
+        if (!JBD2_HAS_INCOMPAT_FEATURE(journal,
+                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT))
+                err = journal_wait_on_locked_list(journal,
+                                                commit_transaction);
 
-                jh = commit_transaction->t_locked_list->b_tprev;
-                bh = jh2bh(jh);
-                get_bh(bh);
-                if (buffer_locked(bh)) {
-                        spin_unlock(&journal->j_list_lock);
-                        wait_on_buffer(bh);
-                        if (unlikely(!buffer_uptodate(bh)))
-                                err = -EIO;
-                        spin_lock(&journal->j_list_lock);
-                }
-                if (!inverted_lock(journal, bh)) {
-                        put_bh(bh);
-                        spin_lock(&journal->j_list_lock);
-                        continue;
-                }
-                if (buffer_jbd(bh) && jh->b_jlist == BJ_Locked) {
-                        __jbd2_journal_unfile_buffer(jh);
-                        jbd_unlock_bh_state(bh);
-                        jbd2_journal_remove_journal_head(bh);
-                        put_bh(bh);
-                } else {
-                        jbd_unlock_bh_state(bh);
-                }
-                put_bh(bh);
-                cond_resched_lock(&journal->j_list_lock);
-        }
         spin_unlock(&journal->j_list_lock);
 
         if (err)
@@ -498,6 +577,12 @@ void jbd2_journal_commit_transaction(journal_t *journal)
          */
         commit_transaction->t_state = T_COMMIT;
 
+        stats.u.run.rs_logging = jiffies;
+        stats.u.run.rs_flushing = jbd2_time_diff(stats.u.run.rs_flushing,
+                                                 stats.u.run.rs_logging);
+        stats.u.run.rs_blocks = commit_transaction->t_outstanding_credits;
+        stats.u.run.rs_blocks_logged = 0;
+
         descriptor = NULL;
         bufs = 0;
         while (commit_transaction->t_buffers) {
@@ -639,6 +724,15 @@ void jbd2_journal_commit_transaction(journal_t *journal)
 start_journal_io:
                         for (i = 0; i < bufs; i++) {
                                 struct buffer_head *bh = wbuf[i];
+                                /*
+                                 * Compute checksum.
+                                 */
+                                if (JBD2_HAS_COMPAT_FEATURE(journal,
+                                        JBD2_FEATURE_COMPAT_CHECKSUM)) {
+                                        crc32_sum =
+                                            jbd2_checksum_data(crc32_sum, bh);
+                                }
+
                                 lock_buffer(bh);
                                 clear_buffer_dirty(bh);
                                 set_buffer_uptodate(bh);
@@ -646,6 +740,7 @@ start_journal_io:
                                 submit_bh(WRITE, bh);
                         }
                         cond_resched();
+                        stats.u.run.rs_blocks_logged += bufs;
 
                         /* Force a new descriptor to be generated next
                            time round the loop. */
@@ -654,6 +749,23 @@ start_journal_io:
                 }
         }
 
+        /* Done it all: now write the commit record asynchronously. */
+
+        if (JBD2_HAS_INCOMPAT_FEATURE(journal,
+                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) {
+                err = journal_submit_commit_record(journal, commit_transaction,
+                                                 &cbh, crc32_sum);
+                if (err)
+                        __jbd2_journal_abort_hard(journal);
+
+                spin_lock(&journal->j_list_lock);
+                err = journal_wait_on_locked_list(journal,
+                                                commit_transaction);
+                spin_unlock(&journal->j_list_lock);
+                if (err)
+                        __jbd2_journal_abort_hard(journal);
+        }
+
         /* Lo and behold: we have just managed to send a transaction to
            the log.  Before we can commit it, wait for the IO so far to
            complete.  Control buffers being written are on the
@@ -753,8 +865,14 @@ wait_for_iobuf:
 
         jbd_debug(3, "JBD: commit phase 6\n");
 
-        if (journal_write_commit_record(journal, commit_transaction))
-                err = -EIO;
+        if (!JBD2_HAS_INCOMPAT_FEATURE(journal,
+                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) {
+                err = journal_submit_commit_record(journal, commit_transaction,
+                                                &cbh, crc32_sum);
+                if (err)
+                        __jbd2_journal_abort_hard(journal);
+        }
+        err = journal_wait_on_commit_record(cbh);
 
         if (err)
                 jbd2_journal_abort(journal, err);
@@ -816,6 +934,7 @@ restart_loop:
                 cp_transaction = jh->b_cp_transaction;
                 if (cp_transaction) {
                         JBUFFER_TRACE(jh, "remove from old cp transaction");
+                        cp_transaction->t_chp_stats.cs_dropped++;
                         __jbd2_journal_remove_checkpoint(jh);
                 }
 
@@ -867,10 +986,10 @@ restart_loop:
         }
         spin_unlock(&journal->j_list_lock);
         /*
-         * This is a bit sleazy.  We borrow j_list_lock to protect
-         * journal->j_committing_transaction in __jbd2_journal_remove_checkpoint.
-         * Really, __jbd2_journal_remove_checkpoint should be using j_state_lock but
-         * it's a bit hassle to hold that across __jbd2_journal_remove_checkpoint
+         * This is a bit sleazy.  We use j_list_lock to protect transition
+         * of a transaction into T_FINISHED state and calling
+         * __jbd2_journal_drop_transaction(). Otherwise we could race with
+         * other checkpointing code processing the transaction...
          */
         spin_lock(&journal->j_state_lock);
         spin_lock(&journal->j_list_lock);
@@ -890,6 +1009,36 @@ restart_loop:
 
         J_ASSERT(commit_transaction->t_state == T_COMMIT);
 
+        commit_transaction->t_start = jiffies;
+        stats.u.run.rs_logging = jbd2_time_diff(stats.u.run.rs_logging,
+                                                commit_transaction->t_start);
+
+        /*
+         * File the transaction for history
+         */
+        stats.ts_type = JBD2_STATS_RUN;
+        stats.ts_tid = commit_transaction->t_tid;
+        stats.u.run.rs_handle_count = commit_transaction->t_handle_count;
+        spin_lock(&journal->j_history_lock);
+        memcpy(journal->j_history + journal->j_history_cur, &stats,
+                        sizeof(stats));
+        if (++journal->j_history_cur == journal->j_history_max)
+                journal->j_history_cur = 0;
+
+        /*
+         * Calculate overall stats
+         */
+        journal->j_stats.ts_tid++;
+        journal->j_stats.u.run.rs_wait += stats.u.run.rs_wait;
+        journal->j_stats.u.run.rs_running += stats.u.run.rs_running;
+        journal->j_stats.u.run.rs_locked += stats.u.run.rs_locked;
+        journal->j_stats.u.run.rs_flushing += stats.u.run.rs_flushing;
+        journal->j_stats.u.run.rs_logging += stats.u.run.rs_logging;
+        journal->j_stats.u.run.rs_handle_count += stats.u.run.rs_handle_count;
+        journal->j_stats.u.run.rs_blocks += stats.u.run.rs_blocks;
+        journal->j_stats.u.run.rs_blocks_logged += stats.u.run.rs_blocks_logged;
+        spin_unlock(&journal->j_history_lock);
+
         commit_transaction->t_state = T_FINISHED;
         J_ASSERT(commit_transaction == journal->j_committing_transaction);
         journal->j_commit_sequence = commit_transaction->t_tid;
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 6ddc5531587c..96ba846992e9 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -36,6 +36,7 @@
 #include <linux/poison.h>
 #include <linux/proc_fs.h>
 #include <linux/debugfs.h>
+#include <linux/seq_file.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
@@ -640,6 +641,312 @@ struct journal_head *jbd2_journal_get_descriptor_buffer(journal_t *journal)
         return jbd2_journal_add_journal_head(bh);
 }
 
+struct jbd2_stats_proc_session {
+        journal_t *journal;
+        struct transaction_stats_s *stats;
+        int start;
+        int max;
+};
+
+static void *jbd2_history_skip_empty(struct jbd2_stats_proc_session *s,
+                                        struct transaction_stats_s *ts,
+                                        int first)
+{
+        if (ts == s->stats + s->max)
+                ts = s->stats;
+        if (!first && ts == s->stats + s->start)
+                return NULL;
+        while (ts->ts_type == 0) {
+                ts++;
+                if (ts == s->stats + s->max)
+                        ts = s->stats;
+                if (ts == s->stats + s->start)
+                        return NULL;
+        }
+        return ts;
+
+}
+
+static void *jbd2_seq_history_start(struct seq_file *seq, loff_t *pos)
+{
+        struct jbd2_stats_proc_session *s = seq->private;
+        struct transaction_stats_s *ts;
+        int l = *pos;
+
+        if (l == 0)
+                return SEQ_START_TOKEN;
+        ts = jbd2_history_skip_empty(s, s->stats + s->start, 1);
+        if (!ts)
+                return NULL;
+        l--;
+        while (l) {
+                ts = jbd2_history_skip_empty(s, ++ts, 0);
+                if (!ts)
+                        break;
+                l--;
+        }
+        return ts;
+}
+
+static void *jbd2_seq_history_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+        struct jbd2_stats_proc_session *s = seq->private;
+        struct transaction_stats_s *ts = v;
+
+        ++*pos;
+        if (v == SEQ_START_TOKEN)
+                return jbd2_history_skip_empty(s, s->stats + s->start, 1);
+        else
+                return jbd2_history_skip_empty(s, ++ts, 0);
+}
+
+static int jbd2_seq_history_show(struct seq_file *seq, void *v)
+{
+        struct transaction_stats_s *ts = v;
+        if (v == SEQ_START_TOKEN) {
+                seq_printf(seq, "%-4s %-5s %-5s %-5s %-5s %-5s %-5s %-6s %-5s "
+                                "%-5s %-5s %-5s %-5s %-5s\n", "R/C", "tid",
+                                "wait", "run", "lock", "flush", "log", "hndls",
+                                "block", "inlog", "ctime", "write", "drop",
+                                "close");
+                return 0;
+        }
+        if (ts->ts_type == JBD2_STATS_RUN)
+                seq_printf(seq, "%-4s %-5lu %-5u %-5u %-5u %-5u %-5u "
+                                "%-6lu %-5lu %-5lu\n", "R", ts->ts_tid,
+                                jiffies_to_msecs(ts->u.run.rs_wait),
+                                jiffies_to_msecs(ts->u.run.rs_running),
+                                jiffies_to_msecs(ts->u.run.rs_locked),
+                                jiffies_to_msecs(ts->u.run.rs_flushing),
+                                jiffies_to_msecs(ts->u.run.rs_logging),
+                                ts->u.run.rs_handle_count,
+                                ts->u.run.rs_blocks,
+                                ts->u.run.rs_blocks_logged);
+        else if (ts->ts_type == JBD2_STATS_CHECKPOINT)
+                seq_printf(seq, "%-4s %-5lu %48s %-5u %-5lu %-5lu %-5lu\n",
+                                "C", ts->ts_tid, " ",
+                                jiffies_to_msecs(ts->u.chp.cs_chp_time),
+                                ts->u.chp.cs_written, ts->u.chp.cs_dropped,
+                                ts->u.chp.cs_forced_to_close);
+        else
+                J_ASSERT(0);
+        return 0;
+}
+
+static void jbd2_seq_history_stop(struct seq_file *seq, void *v)
+{
+}
+
+static struct seq_operations jbd2_seq_history_ops = {
+        .start  = jbd2_seq_history_start,
+        .next   = jbd2_seq_history_next,
+        .stop   = jbd2_seq_history_stop,
+        .show   = jbd2_seq_history_show,
+};
+
+static int jbd2_seq_history_open(struct inode *inode, struct file *file)
+{
+        journal_t *journal = PDE(inode)->data;
+        struct jbd2_stats_proc_session *s;
+        int rc, size;
+
+        s = kmalloc(sizeof(*s), GFP_KERNEL);
+        if (s == NULL)
+                return -ENOMEM;
+        size = sizeof(struct transaction_stats_s) * journal->j_history_max;
+        s->stats = kmalloc(size, GFP_KERNEL);
+        if (s->stats == NULL) {
+                kfree(s);
+                return -ENOMEM;
+        }
+        spin_lock(&journal->j_history_lock);
+        memcpy(s->stats, journal->j_history, size);
+        s->max = journal->j_history_max;
+        s->start = journal->j_history_cur % s->max;
+        spin_unlock(&journal->j_history_lock);
+
+        rc = seq_open(file, &jbd2_seq_history_ops);
+        if (rc == 0) {
+                struct seq_file *m = file->private_data;
+                m->private = s;
+        } else {
+                kfree(s->stats);
+                kfree(s);
+        }
+        return rc;
+
+}
+
+static int jbd2_seq_history_release(struct inode *inode, struct file *file)
+{
+        struct seq_file *seq = file->private_data;
+        struct jbd2_stats_proc_session *s = seq->private;
+
+        kfree(s->stats);
+        kfree(s);
+        return seq_release(inode, file);
+}
+
+static struct file_operations jbd2_seq_history_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jbd2_seq_history_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = jbd2_seq_history_release,
+};
+
+static void *jbd2_seq_info_start(struct seq_file *seq, loff_t *pos)
+{
+        return *pos ? NULL : SEQ_START_TOKEN;
+}
+
+static void *jbd2_seq_info_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+        return NULL;
+}
+
+static int jbd2_seq_info_show(struct seq_file *seq, void *v)
+{
+        struct jbd2_stats_proc_session *s = seq->private;
+
+        if (v != SEQ_START_TOKEN)
+                return 0;
+        seq_printf(seq, "%lu transaction, each upto %u blocks\n",
+                        s->stats->ts_tid,
+                        s->journal->j_max_transaction_buffers);
+        if (s->stats->ts_tid == 0)
+                return 0;
+        seq_printf(seq, "average: \n  %ums waiting for transaction\n",
+            jiffies_to_msecs(s->stats->u.run.rs_wait / s->stats->ts_tid));
+        seq_printf(seq, "  %ums running transaction\n",
+            jiffies_to_msecs(s->stats->u.run.rs_running / s->stats->ts_tid));
+        seq_printf(seq, "  %ums transaction was being locked\n",
+            jiffies_to_msecs(s->stats->u.run.rs_locked / s->stats->ts_tid));
+        seq_printf(seq, "  %ums flushing data (in ordered mode)\n",
+            jiffies_to_msecs(s->stats->u.run.rs_flushing / s->stats->ts_tid));
+        seq_printf(seq, "  %ums logging transaction\n",
+            jiffies_to_msecs(s->stats->u.run.rs_logging / s->stats->ts_tid));
+        seq_printf(seq, "  %lu handles per transaction\n",
+            s->stats->u.run.rs_handle_count / s->stats->ts_tid);
+        seq_printf(seq, "  %lu blocks per transaction\n",
+            s->stats->u.run.rs_blocks / s->stats->ts_tid);
+        seq_printf(seq, "  %lu logged blocks per transaction\n",
+            s->stats->u.run.rs_blocks_logged / s->stats->ts_tid);
+        return 0;
+}
+
+static void jbd2_seq_info_stop(struct seq_file *seq, void *v)
+{
+}
+
+static struct seq_operations jbd2_seq_info_ops = {
+        .start  = jbd2_seq_info_start,
+        .next   = jbd2_seq_info_next,
+        .stop   = jbd2_seq_info_stop,
+        .show   = jbd2_seq_info_show,
+};
+
+static int jbd2_seq_info_open(struct inode *inode, struct file *file)
+{
+        journal_t *journal = PDE(inode)->data;
+        struct jbd2_stats_proc_session *s;
+        int rc, size;
+
+        s = kmalloc(sizeof(*s), GFP_KERNEL);
+        if (s == NULL)
+                return -ENOMEM;
+        size = sizeof(struct transaction_stats_s);
+        s->stats = kmalloc(size, GFP_KERNEL);
+        if (s->stats == NULL) {
+                kfree(s);
+                return -ENOMEM;
+        }
+        spin_lock(&journal->j_history_lock);
+        memcpy(s->stats, &journal->j_stats, size);
+        s->journal = journal;
+        spin_unlock(&journal->j_history_lock);
+
+        rc = seq_open(file, &jbd2_seq_info_ops);
+        if (rc == 0) {
+                struct seq_file *m = file->private_data;
+                m->private = s;
+        } else {
+                kfree(s->stats);
+                kfree(s);
+        }
+        return rc;
+
+}
+
+static int jbd2_seq_info_release(struct inode *inode, struct file *file)
+{
+        struct seq_file *seq = file->private_data;
+        struct jbd2_stats_proc_session *s = seq->private;
+        kfree(s->stats);
+        kfree(s);
+        return seq_release(inode, file);
+}
+
+static struct file_operations jbd2_seq_info_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jbd2_seq_info_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = jbd2_seq_info_release,
+};
+
+static struct proc_dir_entry *proc_jbd2_stats;
+
+static void jbd2_stats_proc_init(journal_t *journal)
+{
+        char name[BDEVNAME_SIZE];
+
+        snprintf(name, sizeof(name) - 1, "%s", bdevname(journal->j_dev, name));
+        journal->j_proc_entry = proc_mkdir(name, proc_jbd2_stats);
+        if (journal->j_proc_entry) {
+                struct proc_dir_entry *p;
+                p = create_proc_entry("history", S_IRUGO,
+                                journal->j_proc_entry);
+                if (p) {
+                        p->proc_fops = &jbd2_seq_history_fops;
+                        p->data = journal;
+                        p = create_proc_entry("info", S_IRUGO,
+                                                journal->j_proc_entry);
+                        if (p) {
+                                p->proc_fops = &jbd2_seq_info_fops;
+                                p->data = journal;
+                        }
+                }
+        }
+}
+
+static void jbd2_stats_proc_exit(journal_t *journal)
+{
+        char name[BDEVNAME_SIZE];
+
+        snprintf(name, sizeof(name) - 1, "%s", bdevname(journal->j_dev, name));
+        remove_proc_entry("info", journal->j_proc_entry);
+        remove_proc_entry("history", journal->j_proc_entry);
+        remove_proc_entry(name, proc_jbd2_stats);
+}
+
+static void journal_init_stats(journal_t *journal)
+{
+        int size;
+
+        if (!proc_jbd2_stats)
+                return;
+
+        journal->j_history_max = 100;
+        size = sizeof(struct transaction_stats_s) * journal->j_history_max;
+        journal->j_history = kzalloc(size, GFP_KERNEL);
+        if (!journal->j_history) {
+                journal->j_history_max = 0;
+                return;
+        }
+        spin_lock_init(&journal->j_history_lock);
+}
+
 /*
  * Management for journal control blocks: functions to create and
  * destroy journal_t structures, and to initialise and read existing
@@ -681,6 +988,9 @@ static journal_t * journal_init_common (void)
                 kfree(journal);
                 goto fail;
         }
+
+        journal_init_stats(journal);
+
         return journal;
 fail:
         return NULL;
@@ -735,6 +1045,7 @@ journal_t * jbd2_journal_init_dev(struct block_device *bdev,
         journal->j_fs_dev = fs_dev;
         journal->j_blk_offset = start;
         journal->j_maxlen = len;
+        jbd2_stats_proc_init(journal);
 
         bh = __getblk(journal->j_dev, start, journal->j_blocksize);
         J_ASSERT(bh != NULL);
@@ -773,6 +1084,7 @@ journal_t * jbd2_journal_init_inode (struct inode *inode)
 
         journal->j_maxlen = inode->i_size >> inode->i_sb->s_blocksize_bits;
         journal->j_blocksize = inode->i_sb->s_blocksize;
+        jbd2_stats_proc_init(journal);
 
         /* journal descriptor can store up to n blocks -bzzz */
         n = journal->j_blocksize / sizeof(journal_block_tag_t);
@@ -1153,6 +1465,8 @@ void jbd2_journal_destroy(journal_t *journal)
                 brelse(journal->j_sb_buffer);
         }
 
+        if (journal->j_proc_entry)
+                jbd2_stats_proc_exit(journal);
         if (journal->j_inode)
                 iput(journal->j_inode);
         if (journal->j_revoke)
@@ -1264,6 +1578,32 @@ int jbd2_journal_set_features (journal_t *journal, unsigned long compat,
         return 1;
 }
 
+/*
+ * jbd2_journal_clear_features () - Clear a given journal feature in the
+ *                                  superblock
+ * @journal: Journal to act on.
+ * @compat: bitmask of compatible features
+ * @ro: bitmask of features that force read-only mount
+ * @incompat: bitmask of incompatible features
+ *
+ * Clear a given journal feature as present on the
+ * superblock.
+ */
+void jbd2_journal_clear_features(journal_t *journal, unsigned long compat,
+                                unsigned long ro, unsigned long incompat)
+{
+        journal_superblock_t *sb;
+
+        jbd_debug(1, "Clear features 0x%lx/0x%lx/0x%lx\n",
+                  compat, ro, incompat);
+
+        sb = journal->j_superblock;
+
+        sb->s_feature_compat    &= ~cpu_to_be32(compat);
+        sb->s_feature_ro_compat &= ~cpu_to_be32(ro);
+        sb->s_feature_incompat  &= ~cpu_to_be32(incompat);
+}
+EXPORT_SYMBOL(jbd2_journal_clear_features);
 
 /**
  * int jbd2_journal_update_format () - Update on-disk journal structure.
@@ -1633,7 +1973,7 @@ static int journal_init_jbd2_journal_head_cache(void)
         jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head",
                                 sizeof(struct journal_head),
                                 0,              /* offset */
-                                0,              /* flags */
+                                SLAB_TEMPORARY, /* flags */
                                 NULL);          /* ctor */
         retval = 0;
         if (jbd2_journal_head_cache == 0) {
@@ -1900,6 +2240,28 @@ static void __exit jbd2_remove_debugfs_entry(void)
 
 #endif
 
+#ifdef CONFIG_PROC_FS
+
+#define JBD2_STATS_PROC_NAME "fs/jbd2"
+
+static void __init jbd2_create_jbd_stats_proc_entry(void)
+{
+        proc_jbd2_stats = proc_mkdir(JBD2_STATS_PROC_NAME, NULL);
+}
+
+static void __exit jbd2_remove_jbd_stats_proc_entry(void)
+{
+        if (proc_jbd2_stats)
+                remove_proc_entry(JBD2_STATS_PROC_NAME, NULL);
+}
+
+#else
+
+#define jbd2_create_jbd_stats_proc_entry() do {} while (0)
+#define jbd2_remove_jbd_stats_proc_entry() do {} while (0)
+
+#endif
+
 struct kmem_cache *jbd2_handle_cache;
 
 static int __init journal_init_handle_cache(void)
@@ -1907,7 +2269,7 @@ static int __init journal_init_handle_cache(void)
         jbd2_handle_cache = kmem_cache_create("jbd2_journal_handle",
                                 sizeof(handle_t),
                                 0,              /* offset */
-                                0,              /* flags */
+                                SLAB_TEMPORARY, /* flags */
                                 NULL);          /* ctor */
         if (jbd2_handle_cache == NULL) {
                 printk(KERN_EMERG "JBD: failed to create handle cache\n");
@@ -1955,6 +2317,7 @@ static int __init journal_init(void)
         if (ret != 0)
                 jbd2_journal_destroy_caches();
         jbd2_create_debugfs_entry();
+        jbd2_create_jbd_stats_proc_entry();
         return ret;
 }
 
@@ -1966,6 +2329,7 @@ static void __exit journal_exit(void)
                 printk(KERN_EMERG "JBD: leaked %d journal_heads!\n", n);
 #endif
         jbd2_remove_debugfs_entry();
+        jbd2_remove_jbd_stats_proc_entry();
         jbd2_journal_destroy_caches();
 }
 
diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index d0ce627539ef..921680663fa2 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -21,6 +21,7 @@
 #include <linux/jbd2.h>
 #include <linux/errno.h>
 #include <linux/slab.h>
+#include <linux/crc32.h>
 #endif
 
 /*
@@ -316,6 +317,37 @@ static inline unsigned long long read_tag_block(int tag_bytes, journal_block_tag
         return block;
 }
 
+/*
+ * calc_chksums calculates the checksums for the blocks described in the
+ * descriptor block.
+ */
+static int calc_chksums(journal_t *journal, struct buffer_head *bh,
+                        unsigned long *next_log_block, __u32 *crc32_sum)
+{
+        int i, num_blks, err;
+        unsigned long io_block;
+        struct buffer_head *obh;
+
+        num_blks = count_tags(journal, bh);
+        /* Calculate checksum of the descriptor block. */
+        *crc32_sum = crc32_be(*crc32_sum, (void *)bh->b_data, bh->b_size);
+
+        for (i = 0; i < num_blks; i++) {
+                io_block = (*next_log_block)++;
+                wrap(journal, *next_log_block);
+                err = jread(&obh, journal, io_block);
+                if (err) {
+                        printk(KERN_ERR "JBD: IO error %d recovering block "
+                                "%lu in log\n", err, io_block);
+                        return 1;
+                } else {
+                        *crc32_sum = crc32_be(*crc32_sum, (void *)obh->b_data,
+                                     obh->b_size);
+                }
+        }
+        return 0;
+}
+
 static int do_one_pass(journal_t *journal,
                         struct recovery_info *info, enum passtype pass)
 {
@@ -328,6 +360,7 @@ static int do_one_pass(journal_t *journal,
         unsigned int            sequence;
         int                     blocktype;
         int                     tag_bytes = journal_tag_bytes(journal);
+        __u32                   crc32_sum = ~0; /* Transactional Checksums */
 
         /* Precompute the maximum metadata descriptors in a descriptor block */
         int                     MAX_BLOCKS_PER_DESC;
@@ -419,12 +452,26 @@ static int do_one_pass(journal_t *journal,
                 switch(blocktype) {
                 case JBD2_DESCRIPTOR_BLOCK:
                         /* If it is a valid descriptor block, replay it
-                         * in pass REPLAY; otherwise, just skip over the
-                         * blocks it describes. */
+                         * in pass REPLAY; if journal_checksums enabled, then
+                         * calculate checksums in PASS_SCAN, otherwise,
+                         * just skip over the blocks it describes. */
                         if (pass != PASS_REPLAY) {
+                                if (pass == PASS_SCAN &&
+                                    JBD2_HAS_COMPAT_FEATURE(journal,
+                                            JBD2_FEATURE_COMPAT_CHECKSUM) &&
+                                    !info->end_transaction) {
+                                        if (calc_chksums(journal, bh,
+                                                        &next_log_block,
+                                                        &crc32_sum)) {
+                                                put_bh(bh);
+                                                break;
+                                        }
+                                        put_bh(bh);
+                                        continue;
+                                }
                                 next_log_block += count_tags(journal, bh);
                                 wrap(journal, next_log_block);
-                                brelse(bh);
+                                put_bh(bh);
                                 continue;
                         }
 
@@ -516,9 +563,96 @@ static int do_one_pass(journal_t *journal,
                         continue;
 
                 case JBD2_COMMIT_BLOCK:
-                        /* Found an expected commit block: not much to
-                         * do other than move on to the next sequence
+                        /*     How to differentiate between interrupted commit
+                         *               and journal corruption ?
+                         *
+                         * {nth transaction}
+                         *        Checksum Verification Failed
+                         *                       |
+                         *               ____________________
+                         *              |                    |
+                         *      async_commit             sync_commit
+                         *              |                    |
+                         *              | GO TO NEXT    "Journal Corruption"
+                         *              | TRANSACTION
+                         *              |
+                         * {(n+1)th transanction}
+                         *              |
+                         *       _______|______________
+                         *      |                     |
+                         * Commit block found   Commit block not found
+                         *      |                     |
+                         * "Journal Corruption"       |
+                         *               _____________|_________
+                         *              |                       |
+                         *      nth trans corrupt       OR   nth trans
+                         *      and (n+1)th interrupted     interrupted
+                         *      before commit block
+                         *      could reach the disk.
+                         *      (Cannot find the difference in above
+                         *       mentioned conditions. Hence assume
+                         *       "Interrupted Commit".)
+                         */
+
+                        /* Found an expected commit block: if checksums
+                         * are present verify them in PASS_SCAN; else not
+                         * much to do other than move on to the next sequence
                          * number. */
+                        if (pass == PASS_SCAN &&
+                            JBD2_HAS_COMPAT_FEATURE(journal,
+                                    JBD2_FEATURE_COMPAT_CHECKSUM)) {
+                                int chksum_err, chksum_seen;
+                                struct commit_header *cbh =
+                                        (struct commit_header *)bh->b_data;
+                                unsigned found_chksum =
+                                        be32_to_cpu(cbh->h_chksum[0]);
+
+                                chksum_err = chksum_seen = 0;
+
+                                if (info->end_transaction) {
+                                        printk(KERN_ERR "JBD: Transaction %u "
+                                                "found to be corrupt.\n",
+                                                next_commit_ID - 1);
+                                        brelse(bh);
+                                        break;
+                                }
+
+                                if (crc32_sum == found_chksum &&
+                                    cbh->h_chksum_type == JBD2_CRC32_CHKSUM &&
+                                    cbh->h_chksum_size ==
+                                                JBD2_CRC32_CHKSUM_SIZE)
+                                       chksum_seen = 1;
+                                else if (!(cbh->h_chksum_type == 0 &&
+                                             cbh->h_chksum_size == 0 &&
+                                             found_chksum == 0 &&
+                                             !chksum_seen))
+                                /*
+                                 * If fs is mounted using an old kernel and then
+                                 * kernel with journal_chksum is used then we
+                                 * get a situation where the journal flag has
+                                 * checksum flag set but checksums are not
+                                 * present i.e chksum = 0, in the individual
+                                 * commit blocks.
+                                 * Hence to avoid checksum failures, in this
+                                 * situation, this extra check is added.
+                                 */
+                                                chksum_err = 1;
+
+                                if (chksum_err) {
+                                        info->end_transaction = next_commit_ID;
+
+                                        if (!JBD2_HAS_COMPAT_FEATURE(journal,
+                                           JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)){
+                                                printk(KERN_ERR
+                                                       "JBD: Transaction %u "
+                                                       "found to be corrupt.\n",
+                                                       next_commit_ID);
+                                                brelse(bh);
+                                                break;
+                                        }
+                                }
+                                crc32_sum = ~0;
+                        }
                         brelse(bh);
                         next_commit_ID++;
                         continue;
@@ -554,9 +688,10 @@ static int do_one_pass(journal_t *journal,
          * transaction marks the end of the valid log.
          */
 
-        if (pass == PASS_SCAN)
-                info->end_transaction = next_commit_ID;
-        else {
+        if (pass == PASS_SCAN) {
+                if (!info->end_transaction)
+                        info->end_transaction = next_commit_ID;
+        } else {
                 /* It's really bad news if different passes end up at
                  * different places (but possible due to IO errors). */
                 if (info->end_transaction != next_commit_ID) {
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index 3595fd432d5b..df36f42e19e1 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -171,13 +171,15 @@ int __init jbd2_journal_init_revoke_caches(void)
 {
         jbd2_revoke_record_cache = kmem_cache_create("jbd2_revoke_record",
                                            sizeof(struct jbd2_revoke_record_s),
-                                           0, SLAB_HWCACHE_ALIGN, NULL);
+                                           0,
+                                           SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY,
+                                           NULL);
         if (jbd2_revoke_record_cache == 0)
                 return -ENOMEM;
 
         jbd2_revoke_table_cache = kmem_cache_create("jbd2_revoke_table",
                                            sizeof(struct jbd2_revoke_table_s),
-                                           0, 0, NULL);
+                                           0, SLAB_TEMPORARY, NULL);
         if (jbd2_revoke_table_cache == 0) {
                 kmem_cache_destroy(jbd2_revoke_record_cache);
                 jbd2_revoke_record_cache = NULL;
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index b1fcf2b3dca3..b9b0b6f899b9 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -54,11 +54,13 @@ jbd2_get_transaction(journal_t *journal, transaction_t *transaction)
         spin_lock_init(&transaction->t_handle_lock);
 
         /* Set up the commit timer for the new transaction. */
-        journal->j_commit_timer.expires = transaction->t_expires;
+        journal->j_commit_timer.expires = round_jiffies(transaction->t_expires);
         add_timer(&journal->j_commit_timer);
 
         J_ASSERT(journal->j_running_transaction == NULL);
         journal->j_running_transaction = transaction;
+        transaction->t_max_wait = 0;
+        transaction->t_start = jiffies;
 
         return transaction;
 }
@@ -85,6 +87,7 @@ static int start_this_handle(journal_t *journal, handle_t *handle)
         int nblocks = handle->h_buffer_credits;
         transaction_t *new_transaction = NULL;
         int ret = 0;
+        unsigned long ts = jiffies;
 
         if (nblocks > journal->j_max_transaction_buffers) {
                 printk(KERN_ERR "JBD: %s wants too many credits (%d > %d)\n",
@@ -217,6 +220,12 @@ repeat_locked:
         /* OK, account for the buffers that this operation expects to
          * use and add the handle to the running transaction. */
 
+        if (time_after(transaction->t_start, ts)) {
+                ts = jbd2_time_diff(ts, transaction->t_start);
+                if (ts > transaction->t_max_wait)
+                        transaction->t_max_wait = ts;
+        }
+
         handle->h_transaction = transaction;
         transaction->t_outstanding_credits += nblocks;
         transaction->t_updates++;
@@ -232,6 +241,8 @@ out:
         return ret;
 }
 
+static struct lock_class_key jbd2_handle_key;
+
 /* Allocate a new handle.  This should probably be in a slab... */
 static handle_t *new_handle(int nblocks)
 {
@@ -242,6 +253,9 @@ static handle_t *new_handle(int nblocks)
         handle->h_buffer_credits = nblocks;
         handle->h_ref = 1;
 
+        lockdep_init_map(&handle->h_lockdep_map, "jbd2_handle",
+                                                &jbd2_handle_key, 0);
+
         return handle;
 }
 
@@ -284,7 +298,11 @@ handle_t *jbd2_journal_start(journal_t *journal, int nblocks)
                 jbd2_free_handle(handle);
                 current->journal_info = NULL;
                 handle = ERR_PTR(err);
+                goto out;
         }
+
+        lock_acquire(&handle->h_lockdep_map, 0, 0, 0, 2, _THIS_IP_);
+out:
         return handle;
 }
 
@@ -1164,7 +1182,7 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
         }
 
         /* That test should have eliminated the following case: */
-        J_ASSERT_JH(jh, jh->b_frozen_data == 0);
+        J_ASSERT_JH(jh, jh->b_frozen_data == NULL);
 
         JBUFFER_TRACE(jh, "file as BJ_Metadata");
         spin_lock(&journal->j_list_lock);
@@ -1410,6 +1428,8 @@ int jbd2_journal_stop(handle_t *handle)
                 spin_unlock(&journal->j_state_lock);
         }
 
+        lock_release(&handle->h_lockdep_map, 1, _THIS_IP_);
+
         jbd2_free_handle(handle);
         return err;
 }
@@ -1512,7 +1532,7 @@ void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh)
 
         J_ASSERT_JH(jh, jh->b_jlist < BJ_Types);
         if (jh->b_jlist != BJ_None)
-                J_ASSERT_JH(jh, transaction != 0);
+                J_ASSERT_JH(jh, transaction != NULL);
 
         switch (jh->b_jlist) {
         case BJ_None:
@@ -1581,11 +1601,11 @@ __journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
         if (buffer_locked(bh) || buffer_dirty(bh))
                 goto out;
 
-        if (jh->b_next_transaction != 0)
+        if (jh->b_next_transaction != NULL)
                 goto out;
 
         spin_lock(&journal->j_list_lock);
-        if (jh->b_transaction != 0 && jh->b_cp_transaction == 0) {
+        if (jh->b_transaction != NULL && jh->b_cp_transaction == NULL) {
                 if (jh->b_jlist == BJ_SyncData || jh->b_jlist == BJ_Locked) {
                         /* A written-back ordered data buffer */
                         JBUFFER_TRACE(jh, "release data");
@@ -1593,7 +1613,7 @@ __journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
                         jbd2_journal_remove_journal_head(bh);
                         __brelse(bh);
                 }
-        } else if (jh->b_cp_transaction != 0 && jh->b_transaction == 0) {
+        } else if (jh->b_cp_transaction != NULL && jh->b_transaction == NULL) {
                 /* written-back checkpointed metadata buffer */
                 if (jh->b_jlist == BJ_None) {
                         JBUFFER_TRACE(jh, "remove from checkpoint list");
@@ -1953,7 +1973,7 @@ void __jbd2_journal_file_buffer(struct journal_head *jh,
 
         J_ASSERT_JH(jh, jh->b_jlist < BJ_Types);
         J_ASSERT_JH(jh, jh->b_transaction == transaction ||
-                                jh->b_transaction == 0);
+                                jh->b_transaction == NULL);
 
         if (jh->b_transaction && jh->b_jlist == jlist)
                 return;
diff --git a/fs/ocfs2/cluster/sys.c b/fs/ocfs2/cluster/sys.c
index a4b07730b2e1..0c095ce7723d 100644
--- a/fs/ocfs2/cluster/sys.c
+++ b/fs/ocfs2/cluster/sys.c
@@ -64,7 +64,7 @@ int o2cb_sys_init(void)
 {
         int ret;
 
-        o2cb_kset = kset_create_and_add("o2cb", NULL, fs_kobj);
+        o2cb_kset = kset_create_and_add("o2cb", NULL, NULL);
         if (!o2cb_kset)
                 return -ENOMEM;
 
diff --git a/fs/read_write.c b/fs/read_write.c
index c4d3d17923f1..1c177f29e1b7 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -446,6 +446,7 @@ unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to)
         }
         return seg;
 }
+EXPORT_SYMBOL(iov_shorten);
 
 ssize_t do_sync_readv_writev(struct file *filp, const struct iovec *iov,
                 unsigned long nr_segs, size_t len, loff_t *ppos, iov_fn_t fn)
diff --git a/fs/smbfs/Makefile b/fs/smbfs/Makefile
index 6673ee82cb4c..4faf8c4722c3 100644
--- a/fs/smbfs/Makefile
+++ b/fs/smbfs/Makefile
@@ -16,23 +16,3 @@ EXTRA_CFLAGS += -DSMBFS_PARANOIA
 #EXTRA_CFLAGS += -DDEBUG_SMB_TIMESTAMP
 #EXTRA_CFLAGS += -Werror
 
-#
-# Maintainer rules
-#
-
-# getopt.c not included. It is intentionally separate
-SRC = proc.c dir.c cache.c sock.c inode.c file.c ioctl.c smbiod.c request.c \
-        symlink.c
-
-proto:
-        -rm -f proto.h
-        @echo >  proto2.h "/*"
-        @echo >> proto2.h " *  Autogenerated with cproto on: " `date`
-        @echo >> proto2.h " */"
-        @echo >> proto2.h ""
-        @echo >> proto2.h "struct smb_request;"
-        @echo >> proto2.h "struct sock;"
-        @echo >> proto2.h "struct statfs;"
-        @echo >> proto2.h ""
-        cproto -E "gcc -E" -e -v -I $(TOPDIR)/include -DMAKING_PROTO -D__KERNEL__ $(SRC) >> proto2.h
-        mv proto2.h proto.h
diff --git a/include/asm-arm/bitops.h b/include/asm-arm/bitops.h
index 47a6b086eee2..5c60bfc1a84d 100644
--- a/include/asm-arm/bitops.h
+++ b/include/asm-arm/bitops.h
@@ -310,6 +310,8 @@ static inline int constant_fls(int x)
                 _find_first_zero_bit_le(p,sz)
 #define ext2_find_next_zero_bit(p,sz,off)       \
                 _find_next_zero_bit_le(p,sz,off)
+#define ext2_find_next_bit(p, sz, off) \
+                _find_next_bit_le(p, sz, off)
 
 /*
  * Minix is defined to use little-endian byte ordering.
diff --git a/include/asm-avr32/setup.h b/include/asm-avr32/setup.h
index b0828d43e110..ea3070ff13a5 100644
--- a/include/asm-avr32/setup.h
+++ b/include/asm-avr32/setup.h
@@ -110,7 +110,7 @@ struct tagtable {
         int     (*parse)(struct tag *);
 };
 
-#define __tag __attribute_used__ __attribute__((__section__(".taglist.init")))
+#define __tag __used __attribute__((__section__(".taglist.init")))
 #define __tagtable(tag, fn)                                             \
         static struct tagtable __tagtable_##fn __tag = { tag, fn }
 
diff --git a/include/asm-generic/bitops/ext2-non-atomic.h b/include/asm-generic/bitops/ext2-non-atomic.h
index 1697404afa05..63cf822431a2 100644
--- a/include/asm-generic/bitops/ext2-non-atomic.h
+++ b/include/asm-generic/bitops/ext2-non-atomic.h
@@ -14,5 +14,7 @@
         generic_find_first_zero_le_bit((unsigned long *)(addr), (size))
 #define ext2_find_next_zero_bit(addr, size, off) \
         generic_find_next_zero_le_bit((unsigned long *)(addr), (size), (off))
+#define ext2_find_next_bit(addr, size, off) \
+        generic_find_next_le_bit((unsigned long *)(addr), (size), (off))
 
 #endif /* _ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_ */
diff --git a/include/asm-generic/bitops/le.h b/include/asm-generic/bitops/le.h
index b9c7e5d2d2ad..80e3bf13b2b9 100644
--- a/include/asm-generic/bitops/le.h
+++ b/include/asm-generic/bitops/le.h
@@ -20,6 +20,8 @@
 #define generic___test_and_clear_le_bit(nr, addr) __test_and_clear_bit(nr, addr)
 
 #define generic_find_next_zero_le_bit(addr, size, offset) find_next_zero_bit(addr, size, offset)
+#define generic_find_next_le_bit(addr, size, offset) \
+                        find_next_bit(addr, size, offset)
 
 #elif defined(__BIG_ENDIAN)
 
@@ -42,6 +44,8 @@
 
 extern unsigned long generic_find_next_zero_le_bit(const unsigned long *addr,
                 unsigned long size, unsigned long offset);
+extern unsigned long generic_find_next_le_bit(const unsigned long *addr,
+                unsigned long size, unsigned long offset);
 
 #else
 #error "Please fix <asm/byteorder.h>"
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 9f584cc5c5fb..76df771be585 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -9,10 +9,46 @@
 /* Align . to a 8 byte boundary equals to maximum function alignment. */
 #define ALIGN_FUNCTION()  . = ALIGN(8)
 
+/* The actual configuration determine if the init/exit sections
+ * are handled as text/data or they can be discarded (which
+ * often happens at runtime)
+ */
+#ifdef CONFIG_HOTPLUG
+#define DEV_KEEP(sec)    *(.dev##sec)
+#define DEV_DISCARD(sec)
+#else
+#define DEV_KEEP(sec)
+#define DEV_DISCARD(sec) *(.dev##sec)
+#endif
+
+#ifdef CONFIG_HOTPLUG_CPU
+#define CPU_KEEP(sec)    *(.cpu##sec)
+#define CPU_DISCARD(sec)
+#else
+#define CPU_KEEP(sec)
+#define CPU_DISCARD(sec) *(.cpu##sec)
+#endif
+
+#if defined(CONFIG_MEMORY_HOTPLUG)
+#define MEM_KEEP(sec)    *(.mem##sec)
+#define MEM_DISCARD(sec)
+#else
+#define MEM_KEEP(sec)
+#define MEM_DISCARD(sec) *(.mem##sec)
+#endif
+
+
 /* .data section */
 #define DATA_DATA                                                       \
         *(.data)                                                        \
         *(.data.init.refok)                                             \
+        *(.ref.data)                                                    \
+        DEV_KEEP(init.data)                                             \
+        DEV_KEEP(exit.data)                                             \
+        CPU_KEEP(init.data)                                             \
+        CPU_KEEP(exit.data)                                             \
+        MEM_KEEP(init.data)                                             \
+        MEM_KEEP(exit.data)                                             \
         . = ALIGN(8);                                                   \
         VMLINUX_SYMBOL(__start___markers) = .;                          \
         *(__markers)                                                    \
@@ -132,6 +168,17 @@
                 *(__ksymtab_strings)                                    \
         }                                                               \
                                                                         \
+        /* __*init sections */                                          \
+        __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
+                *(.ref.rodata)                                          \
+                DEV_KEEP(init.rodata)                                   \
+                DEV_KEEP(exit.rodata)                                   \
+                CPU_KEEP(init.rodata)                                   \
+                CPU_KEEP(exit.rodata)                                   \
+                MEM_KEEP(init.rodata)                                   \
+                MEM_KEEP(exit.rodata)                                   \
+        }                                                               \
+                                                                        \
         /* Built-in module parameters. */                               \
         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
                 VMLINUX_SYMBOL(__start___param) = .;                    \
@@ -139,7 +186,6 @@
                 VMLINUX_SYMBOL(__stop___param) = .;                     \
                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
         }                                                               \
-                                                                        \
         . = ALIGN((align));
 
 /* RODATA provided for backward compatibility.
@@ -158,8 +204,16 @@
 #define TEXT_TEXT                                                       \
                 ALIGN_FUNCTION();                                       \
                 *(.text)                                                \
+                *(.ref.text)                                            \
                 *(.text.init.refok)                                     \
-                *(.exit.text.refok)
+                *(.exit.text.refok)                                     \
+        DEV_KEEP(init.text)                                             \
+        DEV_KEEP(exit.text)                                             \
+        CPU_KEEP(init.text)                                             \
+        CPU_KEEP(exit.text)                                             \
+        MEM_KEEP(init.text)                                             \
+        MEM_KEEP(exit.text)
+
 
 /* sched.text is aling to function alignment to secure we have same
  * address even at second ld pass when generating System.map */
@@ -183,6 +237,37 @@
                 *(.kprobes.text)                                        \
                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
 
+/* init and exit section handling */
+#define INIT_DATA                                                       \
+        *(.init.data)                                                   \
+        DEV_DISCARD(init.data)                                          \
+        DEV_DISCARD(init.rodata)                                        \
+        CPU_DISCARD(init.data)                                          \
+        CPU_DISCARD(init.rodata)                                        \
+        MEM_DISCARD(init.data)                                          \
+        MEM_DISCARD(init.rodata)
+
+#define INIT_TEXT                                                       \
+        *(.init.text)                                                   \
+        DEV_DISCARD(init.text)                                          \
+        CPU_DISCARD(init.text)                                          \
+        MEM_DISCARD(init.text)
+
+#define EXIT_DATA                                                       \
+        *(.exit.data)                                                   \
+        DEV_DISCARD(exit.data)                                          \
+        DEV_DISCARD(exit.rodata)                                        \
+        CPU_DISCARD(exit.data)                                          \
+        CPU_DISCARD(exit.rodata)                                        \
+        MEM_DISCARD(exit.data)                                          \
+        MEM_DISCARD(exit.rodata)
+
+#define EXIT_TEXT                                                       \
+        *(.exit.text)                                                   \
+        DEV_DISCARD(exit.text)                                          \
+        CPU_DISCARD(exit.text)                                          \
+        MEM_DISCARD(exit.text)
+
                 /* DWARF debug sections.
                 Symbols in the DWARF debugging sections are relative to
                 the beginning of the section so we begin them at 0.  */
diff --git a/include/asm-ia64/gcc_intrin.h b/include/asm-ia64/gcc_intrin.h
index e58d3298fa10..5b6665c754c9 100644
--- a/include/asm-ia64/gcc_intrin.h
+++ b/include/asm-ia64/gcc_intrin.h
@@ -24,7 +24,7 @@
 extern void ia64_bad_param_for_setreg (void);
 extern void ia64_bad_param_for_getreg (void);
 
-register unsigned long ia64_r13 asm ("r13") __attribute_used__;
+register unsigned long ia64_r13 asm ("r13") __used;
 
 #define ia64_setreg(regnum, val)                                                \
 ({                                                                              \
diff --git a/include/asm-m68k/bitops.h b/include/asm-m68k/bitops.h
index 2976b5d68e96..83d1f286230b 100644
--- a/include/asm-m68k/bitops.h
+++ b/include/asm-m68k/bitops.h
@@ -410,6 +410,8 @@ static inline int ext2_find_next_zero_bit(const void *vaddr, unsigned size,
         res = ext2_find_first_zero_bit (p, size - 32 * (p - addr));
         return (p - addr) * 32 + res;
 }
+#define ext2_find_next_bit(addr, size, off) \
+        generic_find_next_le_bit((unsigned long *)(addr), (size), (off))
 
 #endif /* __KERNEL__ */
 
diff --git a/include/asm-m68knommu/bitops.h b/include/asm-m68knommu/bitops.h
index f8dfb7ba2e25..f43afe1fc3b3 100644
--- a/include/asm-m68knommu/bitops.h
+++ b/include/asm-m68knommu/bitops.h
@@ -294,6 +294,8 @@ found_middle:
         return result + ffz(__swab32(tmp));
 }
 
+#define ext2_find_next_bit(addr, size, off) \
+        generic_find_next_le_bit((unsigned long *)(addr), (size), (off))
 #include <asm-generic/bitops/minix.h>
 
 #endif /* __KERNEL__ */
diff --git a/include/asm-mips/addrspace.h b/include/asm-mips/addrspace.h
index 0bb7a93b7a5e..569f80aacbd2 100644
--- a/include/asm-mips/addrspace.h
+++ b/include/asm-mips/addrspace.h
@@ -127,7 +127,7 @@
 #define PHYS_TO_XKSEG_CACHED(p)         PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE, (p))
 #define XKPHYS_TO_PHYS(p)               ((p) & TO_PHYS_MASK)
 #define PHYS_TO_XKPHYS(cm, a)           (_CONST64_(0x8000000000000000) | \
-                                         ((cm)<<59) | (a))
+                                         (_CONST64_(cm) << 59) | (a))
 
 /*
  * The ultimate limited of the 64-bit MIPS architecture:  2 bits for selecting
diff --git a/include/asm-mips/asm.h b/include/asm-mips/asm.h
index 12e17581b823..608cfcfbb3ea 100644
--- a/include/asm-mips/asm.h
+++ b/include/asm-mips/asm.h
@@ -398,4 +398,12 @@ symbol		=	value
 
 #define SSNOP           sll zero, zero, 1
 
+#ifdef CONFIG_SGI_IP28
+/* Inhibit speculative stores to volatile (e.g.DMA) or invalid addresses. */
+#include <asm/cacheops.h>
+#define R10KCBARRIER(addr)  cache   Cache_Barrier, addr;
+#else
+#define R10KCBARRIER(addr)
+#endif
+
 #endif /* __ASM_ASM_H */
diff --git a/include/asm-mips/bootinfo.h b/include/asm-mips/bootinfo.h
index b2dd9b33de8f..e031bdff9920 100644
--- a/include/asm-mips/bootinfo.h
+++ b/include/asm-mips/bootinfo.h
@@ -48,22 +48,11 @@
 #define  MACH_DS5900            10      /* DECsystem 5900               */
 
 /*
- * Valid machtype for group ARC
- */
-#define MACH_DESKSTATION_RPC44  0       /* Deskstation rPC44 */
-#define MACH_DESKSTATION_TYNE   1       /* Deskstation Tyne */
-
-/*
  * Valid machtype for group SNI_RM
  */
 #define  MACH_SNI_RM200_PCI     0       /* RM200/RM300/RM400 PCI series */
 
 /*
- * Valid machtype for group ACN
- */
-#define  MACH_ACN_MIPS_BOARD    0       /* ACN MIPS single board        */
-
-/*
  * Valid machtype for group SGI
  */
 #define  MACH_SGI_IP22          0       /* Indy, Indigo2, Challenge S   */
@@ -73,44 +62,6 @@
 #define  MACH_SGI_IP30          4       /* Octane, Octane2              */
 
 /*
- * Valid machtype for group COBALT
- */
-#define  MACH_COBALT_27         0       /* Proto "27" hardware          */
-
-/*
- * Valid machtype for group BAGET
- */
-#define  MACH_BAGET201          0       /* BT23-201 */
-#define  MACH_BAGET202          1       /* BT23-202 */
-
-/*
- * Cosine boards.
- */
-#define  MACH_COSINE_ORION      0
-
-/*
- * Valid machtype for group MOMENCO
- */
-#define  MACH_MOMENCO_OCELOT    0
-#define  MACH_MOMENCO_OCELOT_G  1       /* no more supported (may 2007) */
-#define  MACH_MOMENCO_OCELOT_C  2       /* no more supported (jun 2007) */
-#define  MACH_MOMENCO_JAGUAR_ATX 3      /* no more supported (may 2007) */
-#define  MACH_MOMENCO_OCELOT_3  4
-
-/*
- * Valid machtype for group PHILIPS
- */
-#define  MACH_PHILIPS_NINO      0       /* Nino */
-#define  MACH_PHILIPS_VELO      1       /* Velo */
-#define  MACH_PHILIPS_JBS       2       /* JBS */
-#define  MACH_PHILIPS_STB810    3       /* STB810 */
-
-/*
- * Valid machtype for group SIBYTE
- */
-#define  MACH_SWARM              0
-
-/*
  * Valid machtypes for group Toshiba
  */
 #define  MACH_PALLAS            0
@@ -122,64 +73,17 @@
 #define  MACH_TOSHIBA_RBTX4938  6
 
 /*
- * Valid machtype for group Alchemy
- */
-#define  MACH_PB1000            0       /* Au1000-based eval board */
-#define  MACH_PB1100            1       /* Au1100-based eval board */
-#define  MACH_PB1500            2       /* Au1500-based eval board */
-#define  MACH_DB1000            3       /* Au1000-based eval board */
-#define  MACH_DB1100            4       /* Au1100-based eval board */
-#define  MACH_DB1500            5       /* Au1500-based eval board */
-#define  MACH_XXS1500           6       /* Au1500-based eval board */
-#define  MACH_MTX1              7       /* 4G MTX-1 Au1500-based board */
-#define  MACH_PB1550            8       /* Au1550-based eval board */
-#define  MACH_DB1550            9       /* Au1550-based eval board */
-#define  MACH_PB1200            10       /* Au1200-based eval board */
-#define  MACH_DB1200            11       /* Au1200-based eval board */
-
-/*
- * Valid machtype for group NEC_VR41XX
- *
- * Various NEC-based devices.
- *
- * FIXME: MACH_GROUPs should be by _MANUFACTURER_ of * the device, not by
- *        technical properties, so no new additions to this group.
- */
-#define  MACH_NEC_OSPREY        0       /* Osprey eval board */
-#define  MACH_NEC_EAGLE         1       /* NEC Eagle/Hawk board */
-#define  MACH_ZAO_CAPCELLA      2       /* ZAO Networks Capcella */
-#define  MACH_VICTOR_MPC30X     3       /* Victor MP-C303/304 */
-#define  MACH_IBM_WORKPAD       4       /* IBM WorkPad z50 */
-#define  MACH_CASIO_E55         5       /* CASIO CASSIOPEIA E-10/15/55/65 */
-#define  MACH_TANBAC_TB0226     6       /* TANBAC TB0226 (Mbase) */
-#define  MACH_TANBAC_TB0229     7       /* TANBAC TB0229 (VR4131DIMM) */
-#define  MACH_NEC_CMBVR4133     8       /* CMB VR4133 Board */
-
-#define  MACH_HP_LASERJET       1
-
-/*
  * Valid machtype for group LASAT
  */
 #define  MACH_LASAT_100         0       /* Masquerade II/SP100/SP50/SP25 */
 #define  MACH_LASAT_200         1       /* Masquerade PRO/SP200 */
 
 /*
- * Valid machtype for group TITAN
- */
-#define  MACH_TITAN_YOSEMITE    1       /* PMC-Sierra Yosemite          */
-#define  MACH_TITAN_EXCITE      2       /* Basler eXcite                */
-
-/*
  * Valid machtype for group NEC EMMA2RH
  */
 #define  MACH_NEC_MARKEINS      0       /* NEC EMMA2RH Mark-eins        */
 
 /*
- * Valid machtype for group LEMOTE
- */
-#define  MACH_LEMOTE_FULONG        0
-
-/*
  * Valid machtype for group PMC-MSP
  */
 #define MACH_MSP4200_EVAL       0       /* PMC-Sierra MSP4200 Evaluation */
@@ -190,16 +94,9 @@
 #define MACH_MSP7120_FPGA       5       /* PMC-Sierra MSP7120 Emulation */
 #define MACH_MSP_OTHER        255       /* PMC-Sierra unknown board type */
 
-#define MACH_WRPPMC             1
-
-/*
- * Valid machtype for group Broadcom
- */
-#define MACH_GROUP_BRCM         23      /* Broadcom                     */
-#define  MACH_BCM47XX           1       /* Broadcom BCM47XX             */
-
 #define CL_SIZE                 COMMAND_LINE_SIZE
 
+extern char *system_type;
 const char *get_system_type(void);
 
 extern unsigned long mips_machtype;
diff --git a/include/asm-mips/bugs.h b/include/asm-mips/bugs.h
index 0d7f9c1f5546..9dc10df32078 100644
--- a/include/asm-mips/bugs.h
+++ b/include/asm-mips/bugs.h
@@ -1,19 +1,34 @@
 /*
  * This is included by init/main.c to check for architecture-dependent bugs.
  *
+ * Copyright (C) 2007  Maciej W. Rozycki
+ *
  * Needs:
  *      void check_bugs(void);
  */
 #ifndef _ASM_BUGS_H
 #define _ASM_BUGS_H
 
+#include <linux/bug.h>
 #include <linux/delay.h>
+
 #include <asm/cpu.h>
 #include <asm/cpu-info.h>
 
+extern int daddiu_bug;
+
+extern void check_bugs64_early(void);
+
 extern void check_bugs32(void);
 extern void check_bugs64(void);
 
+static inline void check_bugs_early(void)
+{
+#ifdef CONFIG_64BIT
+        check_bugs64_early();
+#endif
+}
+
 static inline void check_bugs(void)
 {
         unsigned int cpu = smp_processor_id();
@@ -25,4 +40,14 @@ static inline void check_bugs(void)
 #endif
 }
 
+static inline int r4k_daddiu_bug(void)
+{
+#ifdef CONFIG_64BIT
+        WARN_ON(daddiu_bug < 0);
+        return daddiu_bug != 0;
+#else
+        return 0;
+#endif
+}
+
 #endif /* _ASM_BUGS_H */
diff --git a/include/asm-mips/cpu-info.h b/include/asm-mips/cpu-info.h
index ed5c02c6afbb..0c5a358863f3 100644
--- a/include/asm-mips/cpu-info.h
+++ b/include/asm-mips/cpu-info.h
@@ -55,6 +55,7 @@ struct cpuinfo_mips {
         struct cache_desc       scache; /* Secondary cache */
         struct cache_desc       tcache; /* Tertiary/split secondary cache */
         int                     srsets; /* Shadow register sets */
+        int                     core;   /* physical core number */
 #if defined(CONFIG_MIPS_MT_SMTC)
         /*
          * In the MIPS MT "SMTC" model, each TC is considered
@@ -63,8 +64,10 @@ struct cpuinfo_mips {
          * to all TCs within the same VPE.
          */
         int                     vpe_id;  /* Virtual Processor number */
-        int                     tc_id;   /* Thread Context number */
 #endif /* CONFIG_MIPS_MT */
+#ifdef CONFIG_MIPS_MT_SMTC
+        int                     tc_id;   /* Thread Context number */
+#endif
         void                    *data;  /* Additional data */
 } __attribute__((aligned(SMP_CACHE_BYTES)));
 
diff --git a/include/asm-mips/cpu.h b/include/asm-mips/cpu.h
index 54fc18a4e5a8..bf5bbc78a9f7 100644
--- a/include/asm-mips/cpu.h
+++ b/include/asm-mips/cpu.h
@@ -195,8 +195,8 @@ enum cpu_type_enum {
          * MIPS32 class processors
          */
         CPU_4KC, CPU_4KEC, CPU_4KSC, CPU_24K, CPU_34K, CPU_74K, CPU_AU1000,
-        CPU_AU1100, CPU_AU1200, CPU_AU1500, CPU_AU1550, CPU_PR4450,
-        CPU_BCM3302, CPU_BCM4710,
+        CPU_AU1100, CPU_AU1200, CPU_AU1210, CPU_AU1250, CPU_AU1500, CPU_AU1550,
+        CPU_PR4450, CPU_BCM3302, CPU_BCM4710,
 
         /*
          * MIPS64 class processors
diff --git a/include/asm-mips/delay.h b/include/asm-mips/delay.h
index fab32131e9b4..b0bccd2c4ed5 100644
--- a/include/asm-mips/delay.h
+++ b/include/asm-mips/delay.h
@@ -6,13 +6,16 @@
  * Copyright (C) 1994 by Waldorf Electronics
  * Copyright (C) 1995 - 2000, 01, 03 by Ralf Baechle
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2007  Maciej W. Rozycki
  */
 #ifndef _ASM_DELAY_H
 #define _ASM_DELAY_H
 
 #include <linux/param.h>
 #include <linux/smp.h>
+
 #include <asm/compiler.h>
+#include <asm/war.h>
 
 static inline void __delay(unsigned long loops)
 {
@@ -25,7 +28,7 @@ static inline void __delay(unsigned long loops)
                 "       .set    reorder                                 \n"
                 : "=r" (loops)
                 : "0" (loops));
-        else if (sizeof(long) == 8)
+        else if (sizeof(long) == 8 && !DADDI_WAR)
                 __asm__ __volatile__ (
                 "       .set    noreorder                               \n"
                 "       .align  3                                       \n"
@@ -34,6 +37,15 @@ static inline void __delay(unsigned long loops)
                 "       .set    reorder                                 \n"
                 : "=r" (loops)
                 : "0" (loops));
+        else if (sizeof(long) == 8 && DADDI_WAR)
+                __asm__ __volatile__ (
+                "       .set    noreorder                               \n"
+                "       .align  3                                       \n"
+                "1:     bnez    %0, 1b                                  \n"
+                "       dsubu   %0, %2                                  \n"
+                "       .set    reorder                                 \n"
+                : "=r" (loops)
+                : "0" (loops), "r" (1));
 }
 
 
@@ -50,7 +62,7 @@ static inline void __delay(unsigned long loops)
 
 static inline void __udelay(unsigned long usecs, unsigned long lpj)
 {
-        unsigned long lo;
+        unsigned long hi, lo;
 
         /*
          * The rates of 128 is rounded wrongly by the catchall case
@@ -70,11 +82,16 @@ static inline void __udelay(unsigned long usecs, unsigned long lpj)
                 : "=h" (usecs), "=l" (lo)
                 : "r" (usecs), "r" (lpj)
                 : GCC_REG_ACCUM);
-        else if (sizeof(long) == 8)
+        else if (sizeof(long) == 8 && !R4000_WAR)
                 __asm__("dmultu\t%2, %3"
                 : "=h" (usecs), "=l" (lo)
                 : "r" (usecs), "r" (lpj)
                 : GCC_REG_ACCUM);
+        else if (sizeof(long) == 8 && R4000_WAR)
+                __asm__("dmultu\t%3, %4\n\tmfhi\t%0"
+                : "=r" (usecs), "=h" (hi), "=l" (lo)
+                : "r" (usecs), "r" (lpj)
+                : GCC_REG_ACCUM);
 
         __delay(usecs);
 }
diff --git a/include/asm-mips/dma.h b/include/asm-mips/dma.h
index d6a6c21f16db..1353c81065d1 100644
--- a/include/asm-mips/dma.h
+++ b/include/asm-mips/dma.h
@@ -84,10 +84,9 @@
  * Deskstations or Acer PICA but not the much more versatile DMA logic used
  * for the local devices on Acer PICA or Magnums.
  */
-#ifdef CONFIG_SGI_IP22
-/* Horrible hack to have a correct DMA window on IP22 */
-#include <asm/sgi/mc.h>
-#define MAX_DMA_ADDRESS         (PAGE_OFFSET + SGIMC_SEG0_BADDR + 0x01000000)
+#if defined(CONFIG_SGI_IP22) || defined(CONFIG_SGI_IP28)
+/* don't care; ISA bus master won't work, ISA slave DMA supports 32bit addr */
+#define MAX_DMA_ADDRESS         PAGE_OFFSET
 #else
 #define MAX_DMA_ADDRESS         (PAGE_OFFSET + 0x01000000)
 #endif
diff --git a/include/asm-mips/fixmap.h b/include/asm-mips/fixmap.h
index f27b96cfac2e..9cc8522a394f 100644
--- a/include/asm-mips/fixmap.h
+++ b/include/asm-mips/fixmap.h
@@ -60,16 +60,6 @@ enum fixed_addresses {
         __end_of_fixed_addresses
 };
 
-extern void __set_fixmap(enum fixed_addresses idx,
-                         unsigned long phys, pgprot_t flags);
-
-#define set_fixmap(idx, phys) \
-                __set_fixmap(idx, phys, PAGE_KERNEL)
-/*
- * Some hardware wants to get fixmapped without caching.
- */
-#define set_fixmap_nocache(idx, phys) \
-                __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
 /*
  * used by vmalloc.c.
  *
diff --git a/include/asm-mips/fw/cfe/cfe_api.h b/include/asm-mips/fw/cfe/cfe_api.h
index 1003e7156bfc..0995575db320 100644
--- a/include/asm-mips/fw/cfe/cfe_api.h
+++ b/include/asm-mips/fw/cfe/cfe_api.h
@@ -15,49 +15,27 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
-
-/*  *********************************************************************
-    *
-    *  Broadcom Common Firmware Environment (CFE)
-    *
-    *  Device function prototypes               File: cfe_api.h
-    *
-    *  This file contains declarations for doing callbacks to
-    *  cfe from an application.  It should be the only header
-    *  needed by the application to use this library
-    *
-    *  Authors:  Mitch Lichtenberg, Chris Demetriou
-    *
-    ********************************************************************* */
-
+/*
+ * Broadcom Common Firmware Environment (CFE)
+ *
+ * This file contains declarations for doing callbacks to
+ * cfe from an application.  It should be the only header
+ * needed by the application to use this library
+ *
+ * Authors:  Mitch Lichtenberg, Chris Demetriou
+ */
 #ifndef CFE_API_H
 #define CFE_API_H
 
-/*
- * Apply customizations here for different OSes.  These need to:
- *      * typedef uint64_t, int64_t, intptr_t, uintptr_t.
- *      * define cfe_strlen() if use of an existing function is desired.
- *      * define CFE_API_IMPL_NAMESPACE if API functions are to use
- *        names in the implementation namespace.
- * Also, optionally, if the build environment does not do so automatically,
- * CFE_API_* can be defined here as desired.
- */
-/* Begin customization. */
 #include <linux/types.h>
 #include <linux/string.h>
 
 typedef long intptr_t;
 
-#define cfe_strlen strlen
 
-#define CFE_API_ALL
-#define CFE_API_STRLEN_CUSTOM
-/* End customization. */
-
-
-/*  *********************************************************************
-    *  Constants
-    ********************************************************************* */
+/*
+ * Constants
+ */
 
 /* Seal indicating CFE's presence, passed to user program. */
 #define CFE_EPTSEAL 0x43464531
@@ -109,54 +87,13 @@ typedef struct {
 
 
 /*
- * cfe_strlen is handled specially: If already defined, it has been
- * overridden in this environment with a standard strlen-like function.
- */
-#ifdef cfe_strlen
-# define CFE_API_STRLEN_CUSTOM
-#else
-# ifdef CFE_API_IMPL_NAMESPACE
-#  define cfe_strlen(a)                 __cfe_strlen(a)
-# endif
-int cfe_strlen(char *name);
-#endif
-
-/*
  * Defines and prototypes for functions which take no arguments.
  */
-#ifdef CFE_API_IMPL_NAMESPACE
-int64_t __cfe_getticks(void);
-#define cfe_getticks()                  __cfe_getticks()
-#else
 int64_t cfe_getticks(void);
-#endif
 
 /*
  * Defines and prototypes for the rest of the functions.
  */
-#ifdef CFE_API_IMPL_NAMESPACE
-#define cfe_close(a)                    __cfe_close(a)
-#define cfe_cpu_start(a, b, c, d, e)    __cfe_cpu_start(a, b, c, d, e)
-#define cfe_cpu_stop(a)                 __cfe_cpu_stop(a)
-#define cfe_enumenv(a, b, d, e, f)      __cfe_enumenv(a, b, d, e, f)
-#define cfe_enummem(a, b, c, d, e)      __cfe_enummem(a, b, c, d, e)
-#define cfe_exit(a, b)                  __cfe_exit(a, b)
-#define cfe_flushcache(a)               __cfe_cacheflush(a)
-#define cfe_getdevinfo(a)               __cfe_getdevinfo(a)
-#define cfe_getenv(a, b, c)             __cfe_getenv(a, b, c)
-#define cfe_getfwinfo(a)                __cfe_getfwinfo(a)
-#define cfe_getstdhandle(a)             __cfe_getstdhandle(a)
-#define cfe_init(a, b)                  __cfe_init(a, b)
-#define cfe_inpstat(a)                  __cfe_inpstat(a)
-#define cfe_ioctl(a, b, c, d, e, f)     __cfe_ioctl(a, b, c, d, e, f)
-#define cfe_open(a)                     __cfe_open(a)
-#define cfe_read(a, b, c)               __cfe_read(a, b, c)
-#define cfe_readblk(a, b, c, d)         __cfe_readblk(a, b, c, d)
-#define cfe_setenv(a, b)                __cfe_setenv(a, b)
-#define cfe_write(a, b, c)              __cfe_write(a, b, c)
-#define cfe_writeblk(a, b, c, d)        __cfe_writeblk(a, b, c, d)
-#endif                          /* CFE_API_IMPL_NAMESPACE */
-
 int cfe_close(int handle);
 int cfe_cpu_start(int cpu, void (*fn) (void), long sp, long gp, long a1);
 int cfe_cpu_stop(int cpu);
diff --git a/include/asm-mips/fw/cfe/cfe_error.h b/include/asm-mips/fw/cfe/cfe_error.h
index 975f00002cbe..b80374636279 100644
--- a/include/asm-mips/fw/cfe/cfe_error.h
+++ b/include/asm-mips/fw/cfe/cfe_error.h
@@ -16,18 +16,13 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
-/*  *********************************************************************
-    *
-    *  Broadcom Common Firmware Environment (CFE)
-    *
-    *  Error codes                              File: cfe_error.h
-    *
-    *  CFE's global error code list is here.
-    *
-    *  Author:  Mitch Lichtenberg
-    *
-    ********************************************************************* */
-
+/*
+ * Broadcom Common Firmware Environment (CFE)
+ *
+ * CFE's global error code list is here.
+ *
+ * Author:  Mitch Lichtenberg
+ */
 
 #define CFE_OK                   0
 #define CFE_ERR                 -1      /* generic error */
diff --git a/include/asm-mips/mach-cobalt/cobalt.h b/include/asm-mips/mach-cobalt/cobalt.h
index a79e7caf3a86..5b9fce73f11d 100644
--- a/include/asm-mips/mach-cobalt/cobalt.h
+++ b/include/asm-mips/mach-cobalt/cobalt.h
@@ -1,5 +1,5 @@
 /*
- * Lowlevel hardware stuff for the MIPS based Cobalt microservers.
+ * The Cobalt board ID information.
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -12,9 +12,6 @@
 #ifndef __ASM_COBALT_H
 #define __ASM_COBALT_H
 
-/*
- * The Cobalt board ID information.
- */
 extern int cobalt_board_id;
 
 #define COBALT_BRD_ID_QUBE1    0x3
@@ -22,14 +19,4 @@ extern int cobalt_board_id;
 #define COBALT_BRD_ID_QUBE2    0x5
 #define COBALT_BRD_ID_RAQ2     0x6
 
-#define COBALT_KEY_PORT         ((~*(volatile unsigned int *) CKSEG1ADDR(0x1d000000) >> 24) & COBALT_KEY_MASK)
-# define COBALT_KEY_CLEAR       (1 << 1)
-# define COBALT_KEY_LEFT        (1 << 2)
-# define COBALT_KEY_UP          (1 << 3)
-# define COBALT_KEY_DOWN        (1 << 4)
-# define COBALT_KEY_RIGHT       (1 << 5)
-# define COBALT_KEY_ENTER       (1 << 6)
-# define COBALT_KEY_SELECT      (1 << 7)
-# define COBALT_KEY_MASK        0xfe
-
 #endif /* __ASM_COBALT_H */
diff --git a/include/asm-mips/mach-ip28/cpu-feature-overrides.h b/include/asm-mips/mach-ip28/cpu-feature-overrides.h
new file mode 100644
index 000000000000..9a53b326f848
--- /dev/null
+++ b/include/asm-mips/mach-ip28/cpu-feature-overrides.h
@@ -0,0 +1,50 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 Ralf Baechle
+ * 6/2004       pf
+ */
+#ifndef __ASM_MACH_IP28_CPU_FEATURE_OVERRIDES_H
+#define __ASM_MACH_IP28_CPU_FEATURE_OVERRIDES_H
+
+/*
+ * IP28 only comes with R10000 family processors all using the same config
+ */
+#define cpu_has_watch           1
+#define cpu_has_mips16          0
+#define cpu_has_divec           0
+#define cpu_has_vce             0
+#define cpu_has_cache_cdex_p    0
+#define cpu_has_cache_cdex_s    0
+#define cpu_has_prefetch        1
+#define cpu_has_mcheck          0
+#define cpu_has_ejtag           0
+
+#define cpu_has_llsc            1
+#define cpu_has_vtag_icache     0
+#define cpu_has_dc_aliases      0 /* see probe_pcache() */
+#define cpu_has_ic_fills_f_dc   0
+#define cpu_has_dsp             0
+#define cpu_icache_snoops_remote_store  1
+#define cpu_has_mipsmt          0
+#define cpu_has_userlocal       0
+
+#define cpu_has_nofpuex         0
+#define cpu_has_64bits          1
+
+#define cpu_has_4kex            1
+#define cpu_has_4k_cache        1
+
+#define cpu_has_inclusive_pcaches       1
+
+#define cpu_dcache_line_size()  32
+#define cpu_icache_line_size()  64
+
+#define cpu_has_mips32r1        0
+#define cpu_has_mips32r2        0
+#define cpu_has_mips64r1        0
+#define cpu_has_mips64r2        0
+
+#endif /* __ASM_MACH_IP28_CPU_FEATURE_OVERRIDES_H */
diff --git a/include/asm-mips/mach-ip28/ds1286.h b/include/asm-mips/mach-ip28/ds1286.h
new file mode 100644
index 000000000000..471bb9a33e0f
--- /dev/null
+++ b/include/asm-mips/mach-ip28/ds1286.h
@@ -0,0 +1,4 @@
+#ifndef __ASM_MACH_IP28_DS1286_H
+#define __ASM_MACH_IP28_DS1286_H
+#include <asm/mach-ip22/ds1286.h>
+#endif /* __ASM_MACH_IP28_DS1286_H */
diff --git a/include/asm-mips/mach-ip28/spaces.h b/include/asm-mips/mach-ip28/spaces.h
new file mode 100644
index 000000000000..05aabb27e5e7
--- /dev/null
+++ b/include/asm-mips/mach-ip28/spaces.h
@@ -0,0 +1,22 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
+ * Copyright (C) 2000, 2002  Maciej W. Rozycki
+ * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
+ * 2004 pf
+ */
+#ifndef _ASM_MACH_IP28_SPACES_H
+#define _ASM_MACH_IP28_SPACES_H
+
+#define CAC_BASE                0xa800000000000000
+
+#define HIGHMEM_START           (~0UL)
+
+#define PHYS_OFFSET             _AC(0x20000000, UL)
+
+#include <asm/mach-generic/spaces.h>
+
+#endif /* _ASM_MACH_IP28_SPACES_H */
diff --git a/include/asm-mips/mach-qemu/war.h b/include/asm-mips/mach-ip28/war.h
index 0eaf0c548a47..a1baafab486a 100644
--- a/include/asm-mips/mach-qemu/war.h
+++ b/include/asm-mips/mach-ip28/war.h
@@ -5,8 +5,8 @@
  *
  * Copyright (C) 2002, 2004, 2007 by Ralf Baechle <ralf@linux-mips.org>
  */
-#ifndef __ASM_MIPS_MACH_QEMU_WAR_H
-#define __ASM_MIPS_MACH_QEMU_WAR_H
+#ifndef __ASM_MIPS_MACH_IP28_WAR_H
+#define __ASM_MIPS_MACH_IP28_WAR_H
 
 #define R4600_V1_INDEX_ICACHEOP_WAR     0
 #define R4600_V1_HIT_CACHEOP_WAR        0
@@ -19,7 +19,7 @@
 #define TX49XX_ICACHE_INDEX_INV_WAR     0
 #define RM9000_CDEX_SMP_WAR             0
 #define ICACHE_REFILLS_WORKAROUND_WAR   0
-#define R10000_LLSC_WAR                 0
+#define R10000_LLSC_WAR                 1
 #define MIPS34K_MISSED_ITLB_WAR         0
 
-#endif /* __ASM_MIPS_MACH_QEMU_WAR_H */
+#endif /* __ASM_MIPS_MACH_IP28_WAR_H */
diff --git a/include/asm-mips/mach-qemu/cpu-feature-overrides.h b/include/asm-mips/mach-qemu/cpu-feature-overrides.h
deleted file mode 100644
index d2daaed235d5..000000000000
--- a/include/asm-mips/mach-qemu/cpu-feature-overrides.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003, 07 Ralf Baechle
- */
-#ifndef __ASM_MACH_QEMU_CPU_FEATURE_OVERRIDES_H
-#define __ASM_MACH_QEMU_CPU_FEATURE_OVERRIDES_H
-
-/*
- * QEMU only comes with a hazard-free MIPS32 processor, so things are easy.
- */
-#define cpu_has_mips16          0
-#define cpu_has_divec           0
-#define cpu_has_cache_cdex_p    0
-#define cpu_has_prefetch        0
-#define cpu_has_mcheck          0
-#define cpu_has_ejtag           0
-
-#define cpu_has_llsc            1
-#define cpu_has_vtag_icache     0
-#define cpu_has_dc_aliases      0
-#define cpu_has_ic_fills_f_dc   0
-
-#define cpu_has_dsp             0
-#define cpu_has_mipsmt          0
-
-#define cpu_has_nofpuex         0
-#define cpu_has_64bits          0
-
-#endif /* __ASM_MACH_QEMU_CPU_FEATURE_OVERRIDES_H */
diff --git a/include/asm-mips/mips-boards/generic.h b/include/asm-mips/mips-boards/generic.h
index d58977483534..1c39d339521e 100644
--- a/include/asm-mips/mips-boards/generic.h
+++ b/include/asm-mips/mips-boards/generic.h
@@ -97,10 +97,16 @@ extern int mips_revision_corid;
 
 extern int mips_revision_sconid;
 
+extern void mips_reboot_setup(void);
+
 #ifdef CONFIG_PCI
 extern void mips_pcibios_init(void);
 #else
 #define mips_pcibios_init() do { } while (0)
 #endif
 
+#ifdef CONFIG_KGDB
+extern void kgdb_config(void);
+#endif
+
 #endif  /* __ASM_MIPS_BOARDS_GENERIC_H */
diff --git a/include/asm-mips/mipsprom.h b/include/asm-mips/mipsprom.h
index ce7cff7f1e8e..146d41b67adc 100644
--- a/include/asm-mips/mipsprom.h
+++ b/include/asm-mips/mipsprom.h
@@ -71,4 +71,6 @@
 #define PROM_NV_GET             53      /* XXX */
 #define PROM_NV_SET             54      /* XXX */
 
+extern char *prom_getenv(char *);
+
 #endif /* __ASM_MIPS_PROM_H */
diff --git a/include/asm-mips/pmc-sierra/msp71xx/msp_regs.h b/include/asm-mips/pmc-sierra/msp71xx/msp_regs.h
index 0b56f55206c6..603eb737b4a8 100644
--- a/include/asm-mips/pmc-sierra/msp71xx/msp_regs.h
+++ b/include/asm-mips/pmc-sierra/msp71xx/msp_regs.h
@@ -585,11 +585,7 @@
  * UART defines                                                            *
  ***************************************************************************
  */
-#ifndef CONFIG_MSP_FPGA
 #define MSP_BASE_BAUD           25000000
-#else
-#define MSP_BASE_BAUD           6000000
-#endif
 #define MSP_UART_REG_LEN        0x20
 
 /*
diff --git a/include/asm-mips/r4kcache.h b/include/asm-mips/r4kcache.h
index 2b8466ffd3ca..4c140db36786 100644
--- a/include/asm-mips/r4kcache.h
+++ b/include/asm-mips/r4kcache.h
@@ -403,6 +403,13 @@ __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
 
+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16)
+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128)
+
 /* build blast_xxx_range, protected_blast_xxx_range */
 #define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
 static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
diff --git a/include/asm-mips/sgi/ioc.h b/include/asm-mips/sgi/ioc.h
index f3e3dc9bb732..343ed15f8dc4 100644
--- a/include/asm-mips/sgi/ioc.h
+++ b/include/asm-mips/sgi/ioc.h
@@ -138,8 +138,8 @@ struct sgioc_regs {
         u8 _sysid[3];
         volatile u8 sysid;
 #define SGIOC_SYSID_FULLHOUSE   0x01
-#define SGIOC_SYSID_BOARDREV(x) ((x & 0xe0) > 5)
-#define SGIOC_SYSID_CHIPREV(x)  ((x & 0x1e) > 1)
+#define SGIOC_SYSID_BOARDREV(x) (((x) & 0x1e) >> 1)
+#define SGIOC_SYSID_CHIPREV(x)  (((x) & 0xe0) >> 5)
         u32 _unused2;
         u8 _read[3];
         volatile u8 read;
diff --git a/include/asm-mips/sibyte/board.h b/include/asm-mips/sibyte/board.h
index da198a1c8c81..25372ae0e814 100644
--- a/include/asm-mips/sibyte/board.h
+++ b/include/asm-mips/sibyte/board.h
@@ -19,10 +19,8 @@
 #ifndef _SIBYTE_BOARD_H
 #define _SIBYTE_BOARD_H
 
-#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_PTSWARM) || \
-    defined(CONFIG_SIBYTE_PT1120) || defined(CONFIG_SIBYTE_PT1125) || \
-    defined(CONFIG_SIBYTE_CRHONE) || defined(CONFIG_SIBYTE_CRHINE) || \
-    defined(CONFIG_SIBYTE_LITTLESUR)
+#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_CRHONE) || \
+    defined(CONFIG_SIBYTE_CRHINE) || defined(CONFIG_SIBYTE_LITTLESUR)
 #include <asm/sibyte/swarm.h>
 #endif
 
diff --git a/include/asm-mips/sibyte/sb1250.h b/include/asm-mips/sibyte/sb1250.h
index 0dad844a3b5b..80c1a052662a 100644
--- a/include/asm-mips/sibyte/sb1250.h
+++ b/include/asm-mips/sibyte/sb1250.h
@@ -48,12 +48,10 @@ extern unsigned int zbbus_mhz;
 extern void sb1250_time_init(void);
 extern void sb1250_mask_irq(int cpu, int irq);
 extern void sb1250_unmask_irq(int cpu, int irq);
-extern void sb1250_smp_finish(void);
 
 extern void bcm1480_time_init(void);
 extern void bcm1480_mask_irq(int cpu, int irq);
 extern void bcm1480_unmask_irq(int cpu, int irq);
-extern void bcm1480_smp_finish(void);
 
 #define AT_spin \
         __asm__ __volatile__ (          \
diff --git a/include/asm-mips/sibyte/swarm.h b/include/asm-mips/sibyte/swarm.h
index 540865fa7ec3..114d9d29ca9d 100644
--- a/include/asm-mips/sibyte/swarm.h
+++ b/include/asm-mips/sibyte/swarm.h
@@ -26,24 +26,6 @@
 #define SIBYTE_HAVE_PCMCIA 1
 #define SIBYTE_HAVE_IDE    1
 #endif
-#ifdef CONFIG_SIBYTE_PTSWARM
-#define SIBYTE_BOARD_NAME "PTSWARM"
-#define SIBYTE_HAVE_PCMCIA 1
-#define SIBYTE_HAVE_IDE    1
-#define SIBYTE_DEFAULT_CONSOLE "ttyS0,115200"
-#endif
-#ifdef CONFIG_SIBYTE_PT1120
-#define SIBYTE_BOARD_NAME "PT1120"
-#define SIBYTE_HAVE_PCMCIA 1
-#define SIBYTE_HAVE_IDE    1
-#define SIBYTE_DEFAULT_CONSOLE "ttyS0,115200"
-#endif
-#ifdef CONFIG_SIBYTE_PT1125
-#define SIBYTE_BOARD_NAME "PT1125"
-#define SIBYTE_HAVE_PCMCIA 1
-#define SIBYTE_HAVE_IDE    1
-#define SIBYTE_DEFAULT_CONSOLE "ttyS0,115200"
-#endif
 #ifdef CONFIG_SIBYTE_LITTLESUR
 #define SIBYTE_BOARD_NAME "BCM91250C2 (LittleSur)"
 #define SIBYTE_HAVE_PCMCIA 0
diff --git a/include/asm-mips/smp-ops.h b/include/asm-mips/smp-ops.h
new file mode 100644
index 000000000000..b17fdfb5d818
--- /dev/null
+++ b/include/asm-mips/smp-ops.h
@@ -0,0 +1,56 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
+ * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
+ * Copyright (C) 2000, 2001, 2002 Ralf Baechle
+ * Copyright (C) 2000, 2001 Broadcom Corporation
+ */
+#ifndef __ASM_SMP_OPS_H
+#define __ASM_SMP_OPS_H
+
+#ifdef CONFIG_SMP
+
+#include <linux/cpumask.h>
+
+struct plat_smp_ops {
+        void (*send_ipi_single)(int cpu, unsigned int action);
+        void (*send_ipi_mask)(cpumask_t mask, unsigned int action);
+        void (*init_secondary)(void);
+        void (*smp_finish)(void);
+        void (*cpus_done)(void);
+        void (*boot_secondary)(int cpu, struct task_struct *idle);
+        void (*smp_setup)(void);
+        void (*prepare_cpus)(unsigned int max_cpus);
+};
+
+extern void register_smp_ops(struct plat_smp_ops *ops);
+
+static inline void plat_smp_setup(void)
+{
+        extern struct plat_smp_ops *mp_ops;     /* private */
+
+        mp_ops->smp_setup();
+}
+
+#else /* !CONFIG_SMP */
+
+struct plat_smp_ops;
+
+static inline void plat_smp_setup(void)
+{
+        /* UP, nothing to do ...  */
+}
+
+static inline void register_smp_ops(struct plat_smp_ops *ops)
+{
+}
+
+#endif /* !CONFIG_SMP */
+
+extern struct plat_smp_ops up_smp_ops;
+extern struct plat_smp_ops vsmp_smp_ops;
+
+#endif /* __ASM_SMP_OPS_H */
diff --git a/include/asm-mips/smp.h b/include/asm-mips/smp.h
index dc770025a9b0..84fef1aeec0c 100644
--- a/include/asm-mips/smp.h
+++ b/include/asm-mips/smp.h
@@ -11,14 +11,16 @@
 #ifndef __ASM_SMP_H
 #define __ASM_SMP_H
 
-
-#ifdef CONFIG_SMP
-
 #include <linux/bitops.h>
 #include <linux/linkage.h>
 #include <linux/threads.h>
 #include <linux/cpumask.h>
+
 #include <asm/atomic.h>
+#include <asm/smp-ops.h>
+
+extern int smp_num_siblings;
+extern cpumask_t cpu_sibling_map[];
 
 #define raw_smp_processor_id() (current_thread_info()->cpu)
 
@@ -49,56 +51,6 @@ extern struct call_data_struct *call_data;
 extern cpumask_t phys_cpu_present_map;
 #define cpu_possible_map        phys_cpu_present_map
 
-/*
- * These are defined by the board-specific code.
- */
-
-/*
- * Cause the function described by call_data to be executed on the passed
- * cpu.  When the function has finished, increment the finished field of
- * call_data.
- */
-extern void core_send_ipi(int cpu, unsigned int action);
-
-static inline void core_send_ipi_mask(cpumask_t mask, unsigned int action)
-{
-        unsigned int i;
-
-        for_each_cpu_mask(i, mask)
-                core_send_ipi(i, action);
-}
-
-
-/*
- * Firmware CPU startup hook
- */
-extern void prom_boot_secondary(int cpu, struct task_struct *idle);
-
-/*
- *  After we've done initial boot, this function is called to allow the
- *  board code to clean up state, if needed
- */
-extern void prom_init_secondary(void);
-
-/*
- * Populate cpu_possible_map before smp_init, called from setup_arch.
- */
-extern void plat_smp_setup(void);
-
-/*
- * Called in smp_prepare_cpus.
- */
-extern void plat_prepare_cpus(unsigned int max_cpus);
-
-/*
- * Last chance for the board code to finish SMP initialization before
- * the CPU is "online".
- */
-extern void prom_smp_finish(void);
-
-/* Hook for after all CPUs are online */
-extern void prom_cpus_done(void);
-
 extern void asmlinkage smp_bootstrap(void);
 
 /*
@@ -108,11 +60,11 @@ extern void asmlinkage smp_bootstrap(void);
  */
 static inline void smp_send_reschedule(int cpu)
 {
-        core_send_ipi(cpu, SMP_RESCHEDULE_YOURSELF);
+        extern struct plat_smp_ops *mp_ops;     /* private */
+
+        mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
 }
 
 extern asmlinkage void smp_call_function_interrupt(void);
 
-#endif /* CONFIG_SMP */
-
 #endif /* __ASM_SMP_H */
diff --git a/include/asm-mips/sni.h b/include/asm-mips/sni.h
index af081457f847..e716447e5e03 100644
--- a/include/asm-mips/sni.h
+++ b/include/asm-mips/sni.h
@@ -35,23 +35,23 @@ extern unsigned int sni_brd_type;
 #define SNI_CPU_M8050           0x0b
 #define SNI_CPU_M8053           0x0d
 
-#define SNI_PORT_BASE           0xb4000000
+#define SNI_PORT_BASE           CKSEG1ADDR(0xb4000000)
 
 #ifndef __MIPSEL__
 /*
  * ASIC PCI registers for big endian configuration.
  */
-#define PCIMT_UCONF             0xbfff0004
-#define PCIMT_IOADTIMEOUT2      0xbfff000c
-#define PCIMT_IOMEMCONF         0xbfff0014
-#define PCIMT_IOMMU             0xbfff001c
-#define PCIMT_IOADTIMEOUT1      0xbfff0024
-#define PCIMT_DMAACCESS         0xbfff002c
-#define PCIMT_DMAHIT            0xbfff0034
-#define PCIMT_ERRSTATUS         0xbfff003c
-#define PCIMT_ERRADDR           0xbfff0044
-#define PCIMT_SYNDROME          0xbfff004c
-#define PCIMT_ITPEND            0xbfff0054
+#define PCIMT_UCONF             CKSEG1ADDR(0xbfff0004)
+#define PCIMT_IOADTIMEOUT2      CKSEG1ADDR(0xbfff000c)
+#define PCIMT_IOMEMCONF         CKSEG1ADDR(0xbfff0014)
+#define PCIMT_IOMMU             CKSEG1ADDR(0xbfff001c)
+#define PCIMT_IOADTIMEOUT1      CKSEG1ADDR(0xbfff0024)
+#define PCIMT_DMAACCESS         CKSEG1ADDR(0xbfff002c)
+#define PCIMT_DMAHIT            CKSEG1ADDR(0xbfff0034)
+#define PCIMT_ERRSTATUS         CKSEG1ADDR(0xbfff003c)
+#define PCIMT_ERRADDR           CKSEG1ADDR(0xbfff0044)
+#define PCIMT_SYNDROME          CKSEG1ADDR(0xbfff004c)
+#define PCIMT_ITPEND            CKSEG1ADDR(0xbfff0054)
 #define  IT_INT2                0x01
 #define  IT_INTD                0x02
 #define  IT_INTC                0x04
@@ -60,32 +60,32 @@ extern unsigned int sni_brd_type;
 #define  IT_EISA                0x20
 #define  IT_SCSI                0x40
 #define  IT_ETH                 0x80
-#define PCIMT_IRQSEL            0xbfff005c
-#define PCIMT_TESTMEM           0xbfff0064
-#define PCIMT_ECCREG            0xbfff006c
-#define PCIMT_CONFIG_ADDRESS    0xbfff0074
-#define PCIMT_ASIC_ID           0xbfff007c      /* read */
-#define PCIMT_SOFT_RESET        0xbfff007c      /* write */
-#define PCIMT_PIA_OE            0xbfff0084
-#define PCIMT_PIA_DATAOUT       0xbfff008c
-#define PCIMT_PIA_DATAIN        0xbfff0094
-#define PCIMT_CACHECONF         0xbfff009c
-#define PCIMT_INVSPACE          0xbfff00a4
+#define PCIMT_IRQSEL            CKSEG1ADDR(0xbfff005c)
+#define PCIMT_TESTMEM           CKSEG1ADDR(0xbfff0064)
+#define PCIMT_ECCREG            CKSEG1ADDR(0xbfff006c)
+#define PCIMT_CONFIG_ADDRESS    CKSEG1ADDR(0xbfff0074)
+#define PCIMT_ASIC_ID           CKSEG1ADDR(0xbfff007c)  /* read */
+#define PCIMT_SOFT_RESET        CKSEG1ADDR(0xbfff007c)  /* write */
+#define PCIMT_PIA_OE            CKSEG1ADDR(0xbfff0084)
+#define PCIMT_PIA_DATAOUT       CKSEG1ADDR(0xbfff008c)
+#define PCIMT_PIA_DATAIN        CKSEG1ADDR(0xbfff0094)
+#define PCIMT_CACHECONF         CKSEG1ADDR(0xbfff009c)
+#define PCIMT_INVSPACE          CKSEG1ADDR(0xbfff00a4)
 #else
 /*
  * ASIC PCI registers for little endian configuration.
  */
-#define PCIMT_UCONF             0xbfff0000
-#define PCIMT_IOADTIMEOUT2      0xbfff0008
-#define PCIMT_IOMEMCONF         0xbfff0010
-#define PCIMT_IOMMU             0xbfff0018
-#define PCIMT_IOADTIMEOUT1      0xbfff0020
-#define PCIMT_DMAACCESS         0xbfff0028
-#define PCIMT_DMAHIT            0xbfff0030
-#define PCIMT_ERRSTATUS         0xbfff0038
-#define PCIMT_ERRADDR           0xbfff0040
-#define PCIMT_SYNDROME          0xbfff0048
-#define PCIMT_ITPEND            0xbfff0050
+#define PCIMT_UCONF             CKSEG1ADDR(0xbfff0000)
+#define PCIMT_IOADTIMEOUT2      CKSEG1ADDR(0xbfff0008)
+#define PCIMT_IOMEMCONF         CKSEG1ADDR(0xbfff0010)
+#define PCIMT_IOMMU             CKSEG1ADDR(0xbfff0018)
+#define PCIMT_IOADTIMEOUT1      CKSEG1ADDR(0xbfff0020)
+#define PCIMT_DMAACCESS         CKSEG1ADDR(0xbfff0028)
+#define PCIMT_DMAHIT            CKSEG1ADDR(0xbfff0030)
+#define PCIMT_ERRSTATUS         CKSEG1ADDR(0xbfff0038)
+#define PCIMT_ERRADDR           CKSEG1ADDR(0xbfff0040)
+#define PCIMT_SYNDROME          CKSEG1ADDR(0xbfff0048)
+#define PCIMT_ITPEND            CKSEG1ADDR(0xbfff0050)
 #define  IT_INT2                0x01
 #define  IT_INTD                0x02
 #define  IT_INTC                0x04
@@ -94,20 +94,20 @@ extern unsigned int sni_brd_type;
 #define  IT_EISA                0x20
 #define  IT_SCSI                0x40
 #define  IT_ETH                 0x80
-#define PCIMT_IRQSEL            0xbfff0058
-#define PCIMT_TESTMEM           0xbfff0060
-#define PCIMT_ECCREG            0xbfff0068
-#define PCIMT_CONFIG_ADDRESS    0xbfff0070
-#define PCIMT_ASIC_ID           0xbfff0078      /* read */
-#define PCIMT_SOFT_RESET        0xbfff0078      /* write */
-#define PCIMT_PIA_OE            0xbfff0080
-#define PCIMT_PIA_DATAOUT       0xbfff0088
-#define PCIMT_PIA_DATAIN        0xbfff0090
-#define PCIMT_CACHECONF         0xbfff0098
-#define PCIMT_INVSPACE          0xbfff00a0
+#define PCIMT_IRQSEL            CKSEG1ADDR(0xbfff0058)
+#define PCIMT_TESTMEM           CKSEG1ADDR(0xbfff0060)
+#define PCIMT_ECCREG            CKSEG1ADDR(0xbfff0068)
+#define PCIMT_CONFIG_ADDRESS    CKSEG1ADDR(0xbfff0070)
+#define PCIMT_ASIC_ID           CKSEG1ADDR(0xbfff0078)  /* read */
+#define PCIMT_SOFT_RESET        CKSEG1ADDR(0xbfff0078)  /* write */
+#define PCIMT_PIA_OE            CKSEG1ADDR(0xbfff0080)
+#define PCIMT_PIA_DATAOUT       CKSEG1ADDR(0xbfff0088)
+#define PCIMT_PIA_DATAIN        CKSEG1ADDR(0xbfff0090)
+#define PCIMT_CACHECONF         CKSEG1ADDR(0xbfff0098)
+#define PCIMT_INVSPACE          CKSEG1ADDR(0xbfff00a0)
 #endif
 
-#define PCIMT_PCI_CONF          0xbfff0100
+#define PCIMT_PCI_CONF          CKSEG1ADDR(0xbfff0100)
 
 /*
  * Data port for the PCI bus in IO space
@@ -117,34 +117,34 @@ extern unsigned int sni_brd_type;
 /*
  * Board specific registers
  */
-#define PCIMT_CSMSR             0xbfd00000
-#define PCIMT_CSSWITCH          0xbfd10000
-#define PCIMT_CSITPEND          0xbfd20000
-#define PCIMT_AUTO_PO_EN        0xbfd30000
-#define PCIMT_CLR_TEMP          0xbfd40000
-#define PCIMT_AUTO_PO_DIS       0xbfd50000
-#define PCIMT_EXMSR             0xbfd60000
-#define PCIMT_UNUSED1           0xbfd70000
-#define PCIMT_CSWCSM            0xbfd80000
-#define PCIMT_UNUSED2           0xbfd90000
-#define PCIMT_CSLED             0xbfda0000
-#define PCIMT_CSMAPISA          0xbfdb0000
-#define PCIMT_CSRSTBP           0xbfdc0000
-#define PCIMT_CLRPOFF           0xbfdd0000
-#define PCIMT_CSTIMER           0xbfde0000
-#define PCIMT_PWDN              0xbfdf0000
+#define PCIMT_CSMSR             CKSEG1ADDR(0xbfd00000)
+#define PCIMT_CSSWITCH          CKSEG1ADDR(0xbfd10000)
+#define PCIMT_CSITPEND          CKSEG1ADDR(0xbfd20000)
+#define PCIMT_AUTO_PO_EN        CKSEG1ADDR(0xbfd30000)
+#define PCIMT_CLR_TEMP          CKSEG1ADDR(0xbfd40000)
+#define PCIMT_AUTO_PO_DIS       CKSEG1ADDR(0xbfd50000)
+#define PCIMT_EXMSR             CKSEG1ADDR(0xbfd60000)
+#define PCIMT_UNUSED1           CKSEG1ADDR(0xbfd70000)
+#define PCIMT_CSWCSM            CKSEG1ADDR(0xbfd80000)
+#define PCIMT_UNUSED2           CKSEG1ADDR(0xbfd90000)
+#define PCIMT_CSLED             CKSEG1ADDR(0xbfda0000)
+#define PCIMT_CSMAPISA          CKSEG1ADDR(0xbfdb0000)
+#define PCIMT_CSRSTBP           CKSEG1ADDR(0xbfdc0000)
+#define PCIMT_CLRPOFF           CKSEG1ADDR(0xbfdd0000)
+#define PCIMT_CSTIMER           CKSEG1ADDR(0xbfde0000)
+#define PCIMT_PWDN              CKSEG1ADDR(0xbfdf0000)
 
 /*
  * A20R based boards
  */
-#define A20R_PT_CLOCK_BASE      0xbc040000
-#define A20R_PT_TIM0_ACK        0xbc050000
-#define A20R_PT_TIM1_ACK        0xbc060000
+#define A20R_PT_CLOCK_BASE      CKSEG1ADDR(0xbc040000)
+#define A20R_PT_TIM0_ACK        CKSEG1ADDR(0xbc050000)
+#define A20R_PT_TIM1_ACK        CKSEG1ADDR(0xbc060000)
 
 #define SNI_A20R_IRQ_BASE       MIPS_CPU_IRQ_BASE
 #define SNI_A20R_IRQ_TIMER      (SNI_A20R_IRQ_BASE+5)
 
-#define SNI_PCIT_INT_REG        0xbfff000c
+#define SNI_PCIT_INT_REG        CKSEG1ADDR(0xbfff000c)
 
 #define SNI_PCIT_INT_START      24
 #define SNI_PCIT_INT_END        30
@@ -186,10 +186,30 @@ extern unsigned int sni_brd_type;
 /*
  * Base address for the mapped 16mb EISA bus segment.
  */
-#define PCIMT_EISA_BASE         0xb0000000
+#define PCIMT_EISA_BASE         CKSEG1ADDR(0xb0000000)
 
 /* PCI EISA Interrupt acknowledge  */
-#define PCIMT_INT_ACKNOWLEDGE   0xba000000
+#define PCIMT_INT_ACKNOWLEDGE   CKSEG1ADDR(0xba000000)
+
+/*
+ *  SNI ID PROM
+ *
+ * SNI_IDPROM_MEMSIZE  Memsize in 16MB quantities
+ * SNI_IDPROM_BRDTYPE  Board Type
+ * SNI_IDPROM_CPUTYPE  CPU Type on RM400
+ */
+#ifdef CONFIG_CPU_BIG_ENDIAN
+#define __SNI_END 0
+#endif
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+#define __SNI_END 3
+#endif
+#define SNI_IDPROM_BASE        CKSEG1ADDR(0x1ff00000)
+#define SNI_IDPROM_MEMSIZE     (SNI_IDPROM_BASE + (0x28 ^ __SNI_END))
+#define SNI_IDPROM_BRDTYPE     (SNI_IDPROM_BASE + (0x29 ^ __SNI_END))
+#define SNI_IDPROM_CPUTYPE     (SNI_IDPROM_BASE + (0x30 ^ __SNI_END))
+
+#define SNI_IDPROM_SIZE 0x1000
 
 /* board specific init functions */
 extern void sni_a20r_init(void);
@@ -207,6 +227,9 @@ extern void sni_pcimt_irq_init(void);
 /* timer inits */
 extern void sni_cpu_time_init(void);
 
+/* eisa init for RM200/400 */
+extern int sni_eisa_root_init(void);
+
 /* common irq stuff */
 extern void (*sni_hwint)(void);
 extern struct irqaction sni_isa_irq;
diff --git a/include/asm-mips/stackframe.h b/include/asm-mips/stackframe.h
index fb41a8d76392..051e1af0bb95 100644
--- a/include/asm-mips/stackframe.h
+++ b/include/asm-mips/stackframe.h
@@ -6,6 +6,7 @@
  * Copyright (C) 1994, 95, 96, 99, 2001 Ralf Baechle
  * Copyright (C) 1994, 1995, 1996 Paul M. Antoine.
  * Copyright (C) 1999 Silicon Graphics, Inc.
+ * Copyright (C) 2007  Maciej W. Rozycki
  */
 #ifndef _ASM_STACKFRAME_H
 #define _ASM_STACKFRAME_H
@@ -145,8 +146,16 @@
                 .set    reorder
                 /* Called from user mode, new stack. */
                 get_saved_sp
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
 8:              move    k0, sp
                 PTR_SUBU sp, k1, PT_SIZE
+#else
+                .set    at=k0
+8:              PTR_SUBU k1, PT_SIZE
+                .set    noat
+                move    k0, sp
+                move    sp, k1
+#endif
                 LONG_S  k0, PT_R29(sp)
                 LONG_S  $3, PT_R3(sp)
                 /*
diff --git a/include/asm-mips/time.h b/include/asm-mips/time.h
index 7717934f94c3..a8fd16e1981f 100644
--- a/include/asm-mips/time.h
+++ b/include/asm-mips/time.h
@@ -31,20 +31,13 @@ extern int rtc_mips_set_time(unsigned long);
 extern int rtc_mips_set_mmss(unsigned long);
 
 /*
- * Timer interrupt functions.
- * mips_timer_state is needed for high precision timer calibration.
- */
-extern int (*mips_timer_state)(void);
-
-/*
  * board specific routines required by time_init().
  */
 extern void plat_time_init(void);
 
 /*
  * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
- * counter as a timer interrupt source; otherwise it can be set up
- * automagically with an aid of mips_timer_state.
+ * counter as a timer interrupt source.
  */
 extern unsigned int mips_hpt_frequency;
 
diff --git a/include/asm-mips/topology.h b/include/asm-mips/topology.h
index 0440fb9f2180..259145e07e97 100644
--- a/include/asm-mips/topology.h
+++ b/include/asm-mips/topology.h
@@ -1 +1,17 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 by Ralf Baechle
+ */
+#ifndef __ASM_TOPOLOGY_H
+#define __ASM_TOPOLOGY_H
+
 #include <topology.h>
+
+#ifdef CONFIG_SMP
+#define smt_capable()   (smp_num_siblings > 1)
+#endif
+
+#endif /* __ASM_TOPOLOGY_H */
diff --git a/include/asm-mips/tx4927/tx4927_pci.h b/include/asm-mips/tx4927/tx4927_pci.h
index 3f1e470192e3..0be77df70f2b 100644
--- a/include/asm-mips/tx4927/tx4927_pci.h
+++ b/include/asm-mips/tx4927/tx4927_pci.h
@@ -9,6 +9,7 @@
 #define __ASM_TX4927_TX4927_PCI_H
 
 #define TX4927_CCFG_TOE 0x00004000
+#define TX4927_CCFG_WR  0x00008000
 #define TX4927_CCFG_TINTDIS     0x01000000
 
 #define TX4927_PCIMEM      0x08000000
diff --git a/include/asm-mips/uaccess.h b/include/asm-mips/uaccess.h
index c30c718994c9..66523d610950 100644
--- a/include/asm-mips/uaccess.h
+++ b/include/asm-mips/uaccess.h
@@ -5,6 +5,7 @@
  *
  * Copyright (C) 1996, 1997, 1998, 1999, 2000, 03, 04 by Ralf Baechle
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2007  Maciej W. Rozycki
  */
 #ifndef _ASM_UACCESS_H
 #define _ASM_UACCESS_H
@@ -387,6 +388,12 @@ extern void __put_user_unknown(void);
         "jal\t" #destination "\n\t"
 #endif
 
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
+#define DADDI_SCRATCH "$0"
+#else
+#define DADDI_SCRATCH "$3"
+#endif
+
 extern size_t __copy_user(void *__to, const void *__from, size_t __n);
 
 #define __invoke_copy_to_user(to, from, n)                              \
@@ -403,7 +410,7 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n);
         : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r)       \
         :                                                               \
         : "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31",         \
-          "memory");                                                    \
+          DADDI_SCRATCH, "memory");                                     \
         __cu_len_r;                                                     \
 })
 
@@ -512,7 +519,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
         : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r)       \
         :                                                               \
         : "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31",         \
-          "memory");                                                    \
+          DADDI_SCRATCH, "memory");                                     \
         __cu_len_r;                                                     \
 })
 
@@ -535,7 +542,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
         : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r)       \
         :                                                               \
         : "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31",         \
-          "memory");                                                    \
+          DADDI_SCRATCH, "memory");                                     \
         __cu_len_r;                                                     \
 })
 
diff --git a/include/asm-mips/war.h b/include/asm-mips/war.h
index d2808edfd4e9..22361d5e3bf0 100644
--- a/include/asm-mips/war.h
+++ b/include/asm-mips/war.h
@@ -4,6 +4,7 @@
  * for more details.
  *
  * Copyright (C) 2002, 2004, 2007 by Ralf Baechle
+ * Copyright (C) 2007  Maciej W. Rozycki
  */
 #ifndef _ASM_WAR_H
 #define _ASM_WAR_H
@@ -11,6 +12,67 @@
 #include <war.h>
 
 /*
+ * Work around certain R4000 CPU errata (as implemented by GCC):
+ *
+ * - A double-word or a variable shift may give an incorrect result
+ *   if executed immediately after starting an integer division:
+ *   "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
+ *   erratum #28
+ *   "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum
+ *   #19
+ *
+ * - A double-word or a variable shift may give an incorrect result
+ *   if executed while an integer multiplication is in progress:
+ *   "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
+ *   errata #16 & #28
+ *
+ * - An integer division may give an incorrect result if started in
+ *   a delay slot of a taken branch or a jump:
+ *   "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
+ *   erratum #52
+ */
+#ifdef CONFIG_CPU_R4000_WORKAROUNDS
+#define R4000_WAR 1
+#else
+#define R4000_WAR 0
+#endif
+
+/*
+ * Work around certain R4400 CPU errata (as implemented by GCC):
+ *
+ * - A double-word or a variable shift may give an incorrect result
+ *   if executed immediately after starting an integer division:
+ *   "MIPS R4400MC Errata, Processor Revision 1.0", erratum #10
+ *   "MIPS R4400MC Errata, Processor Revision 2.0 & 3.0", erratum #4
+ */
+#ifdef CONFIG_CPU_R4400_WORKAROUNDS
+#define R4400_WAR 1
+#else
+#define R4400_WAR 0
+#endif
+
+/*
+ * Work around the "daddi" and "daddiu" CPU errata:
+ *
+ * - The `daddi' instruction fails to trap on overflow.
+ *   "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
+ *   erratum #23
+ *
+ * - The `daddiu' instruction can produce an incorrect result.
+ *   "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0",
+ *   erratum #41
+ *   "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum
+ *   #15
+ *   "MIPS R4400PC/SC Errata, Processor Revision 1.0", erratum #7
+ *   "MIPS R4400MC Errata, Processor Revision 1.0", erratum #5
+ */
+#ifdef CONFIG_CPU_DADDI_WORKAROUNDS
+#define DADDI_WAR 1
+#else
+#define DADDI_WAR 0
+#endif
+
+/*
  * Another R4600 erratum.  Due to the lack of errata information the exact
  * technical details aren't known.  I've experimentally found that disabling
  * interrupts during indexed I-cache flushes seems to be sufficient to deal
diff --git a/include/asm-powerpc/bitops.h b/include/asm-powerpc/bitops.h
index 733b4af7f4f1..220d9a781ab9 100644
--- a/include/asm-powerpc/bitops.h
+++ b/include/asm-powerpc/bitops.h
@@ -359,6 +359,8 @@ static __inline__ int test_le_bit(unsigned long nr,
 unsigned long generic_find_next_zero_le_bit(const unsigned long *addr,
                                     unsigned long size, unsigned long offset);
 
+unsigned long generic_find_next_le_bit(const unsigned long *addr,
+                                    unsigned long size, unsigned long offset);
 /* Bitmap functions for the ext2 filesystem */
 
 #define ext2_set_bit(nr,addr) \
@@ -378,6 +380,8 @@ unsigned long generic_find_next_zero_le_bit(const unsigned long *addr,
 #define ext2_find_next_zero_bit(addr, size, off) \
         generic_find_next_zero_le_bit((unsigned long*)addr, size, off)
 
+#define ext2_find_next_bit(addr, size, off) \
+        generic_find_next_le_bit((unsigned long *)addr, size, off)
 /* Bitmap functions for the minix filesystem.  */
 
 #define minix_test_and_set_bit(nr,addr) \
diff --git a/include/asm-s390/bitops.h b/include/asm-s390/bitops.h
index 34d9a6357c38..dba6fecad0be 100644
--- a/include/asm-s390/bitops.h
+++ b/include/asm-s390/bitops.h
@@ -772,6 +772,8 @@ static inline int sched_find_first_bit(unsigned long *b)
         test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
 #define ext2_test_bit(nr, addr)      \
         test_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
+#define ext2_find_next_bit(addr, size, off) \
+        generic_find_next_le_bit((unsigned long *)(addr), (size), (off))
 
 #ifndef __s390x__
 
diff --git a/include/asm-sh/machvec.h b/include/asm-sh/machvec.h
index ddb18ad23303..b2e4124070ae 100644
--- a/include/asm-sh/machvec.h
+++ b/include/asm-sh/machvec.h
@@ -65,6 +65,6 @@ extern struct sh_machine_vector sh_mv;
 #define get_system_type()       sh_mv.mv_name
 
 #define __initmv \
-        __attribute_used__ __attribute__((__section__ (".machvec.init")))
+        __used __section(.machvec.init)
 
 #endif /* _ASM_SH_MACHVEC_H */
diff --git a/include/asm-sh/thread_info.h b/include/asm-sh/thread_info.h
index c6577d3dc46d..c50e5d35fe84 100644
--- a/include/asm-sh/thread_info.h
+++ b/include/asm-sh/thread_info.h
@@ -68,7 +68,7 @@ struct thread_info {
 #define init_stack              (init_thread_union.stack)
 
 /* how to get the current stack pointer from C */
-register unsigned long current_stack_pointer asm("r15") __attribute_used__;
+register unsigned long current_stack_pointer asm("r15") __used;
 
 /* how to get the thread information struct from C */
 static inline struct thread_info *current_thread_info(void)
diff --git a/include/asm-x86/thread_info_32.h b/include/asm-x86/thread_info_32.h
index ef58fd2a6eb0..a516e9192f11 100644
--- a/include/asm-x86/thread_info_32.h
+++ b/include/asm-x86/thread_info_32.h
@@ -85,7 +85,7 @@ struct thread_info {
 
 
 /* how to get the current stack pointer from C */
-register unsigned long current_stack_pointer asm("esp") __attribute_used__;
+register unsigned long current_stack_pointer asm("esp") __used;
 
 /* how to get the thread information struct from C */
 static inline struct thread_info *current_thread_info(void)
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index bc33a5c87d64..27b9350052b4 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -35,7 +35,6 @@ header-y += atmsap.h
 header-y += atmsvc.h
 header-y += atm_zatm.h
 header-y += auto_fs4.h
-header-y += auxvec.h
 header-y += ax25.h
 header-y += b1lli.h
 header-y += baycom.h
@@ -75,7 +74,7 @@ header-y += gen_stats.h
 header-y += gigaset_dev.h
 header-y += hdsmart.h
 header-y += hysdn_if.h
-header-y += i2c-dev.h
+header-y += i2o-dev.h
 header-y += i8k.h
 header-y += if_arcnet.h
 header-y += if_bonding.h
@@ -160,7 +159,6 @@ header-y += veth.h
 header-y += video_decoder.h
 header-y += video_encoder.h
 header-y += videotext.h
-header-y += vt.h
 header-y += x25.h
 
 unifdef-y += acct.h
@@ -175,6 +173,7 @@ unifdef-y += atm.h
 unifdef-y += atm_tcp.h
 unifdef-y += audit.h
 unifdef-y += auto_fs.h
+unifdef-y += auxvec.h
 unifdef-y += binfmts.h
 unifdef-y += capability.h
 unifdef-y += capi.h
@@ -216,7 +215,7 @@ unifdef-y += hdreg.h
 unifdef-y += hiddev.h
 unifdef-y += hpet.h
 unifdef-y += i2c.h
-unifdef-y += i2o-dev.h
+unifdef-y += i2c-dev.h
 unifdef-y += icmp.h
 unifdef-y += icmpv6.h
 unifdef-y += if_addr.h
@@ -350,6 +349,7 @@ unifdef-y += videodev.h
 unifdef-y += virtio_config.h
 unifdef-y += virtio_blk.h
 unifdef-y += virtio_net.h
+unifdef-y += vt.h
 unifdef-y += wait.h
 unifdef-y += wanrouter.h
 unifdef-y += watchdog.h
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index da0d83fbadc0..e98801f06dcc 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -192,6 +192,8 @@ int sync_dirty_buffer(struct buffer_head *bh);
 int submit_bh(int, struct buffer_head *);
 void write_boundary_block(struct block_device *bdev,
                         sector_t bblock, unsigned blocksize);
+int bh_uptodate_or_lock(struct buffer_head *bh);
+int bh_submit_read(struct buffer_head *bh);
 
 extern int buffer_heads_over_limit;
 
diff --git a/include/linux/compiler-gcc3.h b/include/linux/compiler-gcc3.h
index 2d8c0f48f55e..e5eb795f78a1 100644
--- a/include/linux/compiler-gcc3.h
+++ b/include/linux/compiler-gcc3.h
@@ -7,10 +7,8 @@
 
 #if __GNUC_MINOR__ >= 3
 # define __used                 __attribute__((__used__))
-# define __attribute_used__     __used                          /* deprecated */
 #else
 # define __used                 __attribute__((__unused__))
-# define __attribute_used__     __used                          /* deprecated */
 #endif
 
 #if __GNUC_MINOR__ >= 4
diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index ee7ca5de970c..0ab3a3232330 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -15,7 +15,6 @@
 #endif
 
 #define __used                  __attribute__((__used__))
-#define __attribute_used__      __used                  /* deprecated */
 #define __must_check            __attribute__((warn_unused_result))
 #define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
 #define __always_inline         inline __attribute__((always_inline))
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index c68b67b86ef1..d0e17e1657dc 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -126,10 +126,6 @@ extern void __chk_io_ptr(const volatile void __iomem *);
  * Mark functions that are referenced only in inline assembly as __used so
  * the code is emitted even though it appears to be unreferenced.
  */
-#ifndef __attribute_used__
-# define __attribute_used__     /* deprecated */
-#endif
-
 #ifndef __used
 # define __used                 /* unimplemented */
 #endif
@@ -175,4 +171,9 @@ extern void __chk_io_ptr(const volatile void __iomem *);
 #define __cold
 #endif
 
+/* Simple shorthand for a section definition */
+#ifndef __section
+# define __section(S) __attribute__ ((__section__(#S)))
+#endif
+
 #endif /* __LINUX_COMPILER_H */
diff --git a/include/linux/elfnote.h b/include/linux/elfnote.h
index e831759b2fb5..278e3ef05336 100644
--- a/include/linux/elfnote.h
+++ b/include/linux/elfnote.h
@@ -76,7 +76,7 @@
                 typeof(desc) _desc                                      \
                              __attribute__((aligned(sizeof(Elf##size##_Word)))); \
         } _ELFNOTE_PASTE(_note_, unique)                                \
-                __attribute_used__                                      \
+                __used                                                  \
                 __attribute__((section(".note." name),                  \
                                aligned(sizeof(Elf##size##_Word)),       \
                                unused)) = {                             \
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 97dd409d5f4a..1852313fc7c7 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -20,6 +20,8 @@
 #include <linux/blkdev.h>
 #include <linux/magic.h>
 
+#include <linux/ext4_fs_i.h>
+
 /*
  * The second extended filesystem constants/structures
  */
@@ -51,6 +53,50 @@
 #define ext4_debug(f, a...)     do {} while (0)
 #endif
 
+#define EXT4_MULTIBLOCK_ALLOCATOR       1
+
+/* prefer goal again. length */
+#define EXT4_MB_HINT_MERGE              1
+/* blocks already reserved */
+#define EXT4_MB_HINT_RESERVED           2
+/* metadata is being allocated */
+#define EXT4_MB_HINT_METADATA           4
+/* first blocks in the file */
+#define EXT4_MB_HINT_FIRST              8
+/* search for the best chunk */
+#define EXT4_MB_HINT_BEST               16
+/* data is being allocated */
+#define EXT4_MB_HINT_DATA               32
+/* don't preallocate (for tails) */
+#define EXT4_MB_HINT_NOPREALLOC         64
+/* allocate for locality group */
+#define EXT4_MB_HINT_GROUP_ALLOC        128
+/* allocate goal blocks or none */
+#define EXT4_MB_HINT_GOAL_ONLY          256
+/* goal is meaningful */
+#define EXT4_MB_HINT_TRY_GOAL           512
+
+struct ext4_allocation_request {
+        /* target inode for block we're allocating */
+        struct inode *inode;
+        /* logical block in target inode */
+        ext4_lblk_t logical;
+        /* phys. target (a hint) */
+        ext4_fsblk_t goal;
+        /* the closest logical allocated block to the left */
+        ext4_lblk_t lleft;
+        /* phys. block for ^^^ */
+        ext4_fsblk_t pleft;
+        /* the closest logical allocated block to the right */
+        ext4_lblk_t lright;
+        /* phys. block for ^^^ */
+        ext4_fsblk_t pright;
+        /* how many blocks we want to allocate */
+        unsigned long len;
+        /* flags. see above EXT4_MB_HINT_* */
+        unsigned long flags;
+};
+
 /*
  * Special inodes numbers
  */
@@ -73,8 +119,8 @@
  * Macro-instructions used to manage several block sizes
  */
 #define EXT4_MIN_BLOCK_SIZE             1024
-#define EXT4_MAX_BLOCK_SIZE             4096
-#define EXT4_MIN_BLOCK_LOG_SIZE           10
+#define EXT4_MAX_BLOCK_SIZE             65536
+#define EXT4_MIN_BLOCK_LOG_SIZE         10
 #ifdef __KERNEL__
 # define EXT4_BLOCK_SIZE(s)             ((s)->s_blocksize)
 #else
@@ -118,6 +164,11 @@ struct ext4_group_desc
         __le32  bg_block_bitmap_hi;     /* Blocks bitmap block MSB */
         __le32  bg_inode_bitmap_hi;     /* Inodes bitmap block MSB */
         __le32  bg_inode_table_hi;      /* Inodes table block MSB */
+        __le16  bg_free_blocks_count_hi;/* Free blocks count MSB */
+        __le16  bg_free_inodes_count_hi;/* Free inodes count MSB */
+        __le16  bg_used_dirs_count_hi;  /* Directories count MSB */
+        __le16  bg_itable_unused_hi;    /* Unused inodes count MSB */
+        __u32   bg_reserved2[3];
 };
 
 #define EXT4_BG_INODE_UNINIT    0x0001 /* Inode table/bitmap not in use */
@@ -178,8 +229,9 @@ struct ext4_group_desc
 #define EXT4_NOTAIL_FL                  0x00008000 /* file tail should not be merged */
 #define EXT4_DIRSYNC_FL                 0x00010000 /* dirsync behaviour (directories only) */
 #define EXT4_TOPDIR_FL                  0x00020000 /* Top of directory hierarchies*/
-#define EXT4_RESERVED_FL                0x80000000 /* reserved for ext4 lib */
+#define EXT4_HUGE_FILE_FL               0x00040000 /* Set to each huge file */
 #define EXT4_EXTENTS_FL                 0x00080000 /* Inode uses extents */
+#define EXT4_RESERVED_FL                0x80000000 /* reserved for ext4 lib */
 
 #define EXT4_FL_USER_VISIBLE            0x000BDFFF /* User visible flags */
 #define EXT4_FL_USER_MODIFIABLE         0x000380FF /* User modifiable flags */
@@ -237,6 +289,7 @@ struct ext4_new_group_data {
 #endif
 #define EXT4_IOC_GETRSVSZ               _IOR('f', 5, long)
 #define EXT4_IOC_SETRSVSZ               _IOW('f', 6, long)
+#define EXT4_IOC_MIGRATE                _IO('f', 7)
 
 /*
  * ioctl commands in 32 bit emulation
@@ -275,18 +328,18 @@ struct ext4_mount_options {
 struct ext4_inode {
         __le16  i_mode;         /* File mode */
         __le16  i_uid;          /* Low 16 bits of Owner Uid */
-        __le32  i_size;         /* Size in bytes */
+        __le32  i_size_lo;      /* Size in bytes */
         __le32  i_atime;        /* Access time */
         __le32  i_ctime;        /* Inode Change time */
         __le32  i_mtime;        /* Modification time */
         __le32  i_dtime;        /* Deletion Time */
         __le16  i_gid;          /* Low 16 bits of Group Id */
         __le16  i_links_count;  /* Links count */
-        __le32  i_blocks;       /* Blocks count */
+        __le32  i_blocks_lo;    /* Blocks count */
         __le32  i_flags;        /* File flags */
         union {
                 struct {
-                        __u32  l_i_reserved1;
+                        __le32  l_i_version;
                 } linux1;
                 struct {
                         __u32  h_i_translator;
@@ -297,12 +350,12 @@ struct ext4_inode {
         } osd1;                         /* OS dependent 1 */
         __le32  i_block[EXT4_N_BLOCKS];/* Pointers to blocks */
         __le32  i_generation;   /* File version (for NFS) */
-        __le32  i_file_acl;     /* File ACL */
-        __le32  i_dir_acl;      /* Directory ACL */
+        __le32  i_file_acl_lo;  /* File ACL */
+        __le32  i_size_high;
         __le32  i_obso_faddr;   /* Obsoleted fragment address */
         union {
                 struct {
-                        __le16  l_i_reserved1;  /* Obsoleted fragment number/size which are removed in ext4 */
+                        __le16  l_i_blocks_high; /* were l_i_reserved1 */
                         __le16  l_i_file_acl_high;
                         __le16  l_i_uid_high;   /* these 2 fields */
                         __le16  l_i_gid_high;   /* were reserved2[0] */
@@ -328,9 +381,9 @@ struct ext4_inode {
         __le32  i_atime_extra;  /* extra Access time      (nsec << 2 | epoch) */
         __le32  i_crtime;       /* File Creation time */
         __le32  i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
+        __le32  i_version_hi;   /* high 32 bits for 64-bit version */
 };
 
-#define i_size_high     i_dir_acl
 
 #define EXT4_EPOCH_BITS 2
 #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
@@ -402,9 +455,12 @@ do {									       \
                                        raw_inode->xtime ## _extra);            \
 } while (0)
 
+#define i_disk_version osd1.linux1.l_i_version
+
 #if defined(__KERNEL__) || defined(__linux__)
 #define i_reserved1     osd1.linux1.l_i_reserved1
 #define i_file_acl_high osd2.linux2.l_i_file_acl_high
+#define i_blocks_high   osd2.linux2.l_i_blocks_high
 #define i_uid_low       i_uid
 #define i_gid_low       i_gid
 #define i_uid_high      osd2.linux2.l_i_uid_high
@@ -461,7 +517,10 @@ do {									       \
 #define EXT4_MOUNT_USRQUOTA             0x100000 /* "old" user quota */
 #define EXT4_MOUNT_GRPQUOTA             0x200000 /* "old" group quota */
 #define EXT4_MOUNT_EXTENTS              0x400000 /* Extents support */
-
+#define EXT4_MOUNT_JOURNAL_CHECKSUM     0x800000 /* Journal checksums */
+#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */
+#define EXT4_MOUNT_I_VERSION            0x2000000 /* i_version support */
+#define EXT4_MOUNT_MBALLOC              0x4000000 /* Buddy allocation support */
 /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */
 #ifndef _LINUX_EXT2_FS_H
 #define clear_opt(o, opt)               o &= ~EXT4_MOUNT_##opt
@@ -481,6 +540,7 @@ do {									       \
 #define ext4_test_bit                   ext2_test_bit
 #define ext4_find_first_zero_bit        ext2_find_first_zero_bit
 #define ext4_find_next_zero_bit         ext2_find_next_zero_bit
+#define ext4_find_next_bit              ext2_find_next_bit
 
 /*
  * Maximal mount counts between two filesystem checks
@@ -671,6 +731,7 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER     0x0001
 #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE       0x0002
 #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR        0x0004
+#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE        0x0008
 #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM         0x0010
 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK        0x0020
 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE      0x0040
@@ -682,6 +743,7 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 #define EXT4_FEATURE_INCOMPAT_META_BG           0x0010
 #define EXT4_FEATURE_INCOMPAT_EXTENTS           0x0040 /* extents support */
 #define EXT4_FEATURE_INCOMPAT_64BIT             0x0080
+#define EXT4_FEATURE_INCOMPAT_MMP               0x0100
 #define EXT4_FEATURE_INCOMPAT_FLEX_BG           0x0200
 
 #define EXT4_FEATURE_COMPAT_SUPP        EXT2_FEATURE_COMPAT_EXT_ATTR
@@ -696,7 +758,8 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
                                          EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
                                          EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
                                          EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
-                                         EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
+                                         EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
+                                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
 
 /*
  * Default values for user and/or group using reserved blocks
@@ -767,6 +830,26 @@ struct ext4_dir_entry_2 {
 #define EXT4_DIR_ROUND                  (EXT4_DIR_PAD - 1)
 #define EXT4_DIR_REC_LEN(name_len)      (((name_len) + 8 + EXT4_DIR_ROUND) & \
                                          ~EXT4_DIR_ROUND)
+#define EXT4_MAX_REC_LEN                ((1<<16)-1)
+
+static inline unsigned ext4_rec_len_from_disk(__le16 dlen)
+{
+        unsigned len = le16_to_cpu(dlen);
+
+        if (len == EXT4_MAX_REC_LEN)
+                return 1 << 16;
+        return len;
+}
+
+static inline __le16 ext4_rec_len_to_disk(unsigned len)
+{
+        if (len == (1 << 16))
+                return cpu_to_le16(EXT4_MAX_REC_LEN);
+        else if (len > (1 << 16))
+                BUG();
+        return cpu_to_le16(len);
+}
+
 /*
  * Hash Tree Directory indexing
  * (c) Daniel Phillips, 2001
@@ -810,7 +893,7 @@ struct ext4_iloc
 {
         struct buffer_head *bh;
         unsigned long offset;
-        unsigned long block_group;
+        ext4_group_t block_group;
 };
 
 static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
@@ -835,7 +918,7 @@ struct dir_private_info {
 
 /* calculate the first block number of the group */
 static inline ext4_fsblk_t
-ext4_group_first_block_no(struct super_block *sb, unsigned long group_no)
+ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
 {
         return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
                 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
@@ -866,21 +949,24 @@ extern unsigned int ext4_block_group(struct super_block *sb,
                         ext4_fsblk_t blocknr);
 extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
                         ext4_fsblk_t blocknr);
-extern int ext4_bg_has_super(struct super_block *sb, int group);
-extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group);
+extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
+extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
+                        ext4_group_t group);
 extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode,
                         ext4_fsblk_t goal, int *errp);
 extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode,
                         ext4_fsblk_t goal, unsigned long *count, int *errp);
+extern ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
+                        ext4_fsblk_t goal, unsigned long *count, int *errp);
 extern void ext4_free_blocks (handle_t *handle, struct inode *inode,
-                        ext4_fsblk_t block, unsigned long count);
+                        ext4_fsblk_t block, unsigned long count, int metadata);
 extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb,
                                  ext4_fsblk_t block, unsigned long count,
                                 unsigned long *pdquot_freed_blocks);
 extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *);
 extern void ext4_check_blocks_bitmap (struct super_block *);
 extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
-                                                    unsigned int block_group,
+                                                    ext4_group_t block_group,
                                                     struct buffer_head ** bh);
 extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
 extern void ext4_init_block_alloc_info(struct inode *);
@@ -911,15 +997,32 @@ extern unsigned long ext4_count_dirs (struct super_block *);
 extern void ext4_check_inodes_bitmap (struct super_block *);
 extern unsigned long ext4_count_free (struct buffer_head *, unsigned);
 
+/* mballoc.c */
+extern long ext4_mb_stats;
+extern long ext4_mb_max_to_scan;
+extern int ext4_mb_init(struct super_block *, int);
+extern int ext4_mb_release(struct super_block *);
+extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,
+                                struct ext4_allocation_request *, int *);
+extern int ext4_mb_reserve_blocks(struct super_block *, int);
+extern void ext4_mb_discard_inode_preallocations(struct inode *);
+extern int __init init_ext4_mballoc(void);
+extern void exit_ext4_mballoc(void);
+extern void ext4_mb_free_blocks(handle_t *, struct inode *,
+                unsigned long, unsigned long, int, unsigned long *);
+
 
 /* inode.c */
 int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
                 struct buffer_head *bh, ext4_fsblk_t blocknr);
-struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *);
-struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *);
+struct buffer_head *ext4_getblk(handle_t *, struct inode *,
+                                                ext4_lblk_t, int, int *);
+struct buffer_head *ext4_bread(handle_t *, struct inode *,
+                                                ext4_lblk_t, int, int *);
 int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
-        sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
-        int create, int extend_disksize);
+                                ext4_lblk_t iblock, unsigned long maxblocks,
+                                struct buffer_head *bh_result,
+                                int create, int extend_disksize);
 
 extern void ext4_read_inode (struct inode *);
 extern int  ext4_write_inode (struct inode *, int);
@@ -943,6 +1046,9 @@ extern int ext4_ioctl (struct inode *, struct file *, unsigned int,
                        unsigned long);
 extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long);
 
+/* migrate.c */
+extern int ext4_ext_migrate(struct inode *, struct file *, unsigned int,
+                       unsigned long);
 /* namei.c */
 extern int ext4_orphan_add(handle_t *, struct inode *);
 extern int ext4_orphan_del(handle_t *, struct inode *);
@@ -965,6 +1071,12 @@ extern void ext4_abort (struct super_block *, const char *, const char *, ...)
 extern void ext4_warning (struct super_block *, const char *, const char *, ...)
         __attribute__ ((format (printf, 3, 4)));
 extern void ext4_update_dynamic_rev (struct super_block *sb);
+extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
+                                        __u32 compat);
+extern int ext4_update_rocompat_feature(handle_t *handle,
+                                        struct super_block *sb, __u32 rocompat);
+extern int ext4_update_incompat_feature(handle_t *handle,
+                                        struct super_block *sb, __u32 incompat);
 extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
                                       struct ext4_group_desc *bg);
 extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
@@ -1017,6 +1129,29 @@ static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
         es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
 }
 
+static inline loff_t ext4_isize(struct ext4_inode *raw_inode)
+{
+        return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
+                le32_to_cpu(raw_inode->i_size_lo);
+}
+
+static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
+{
+        raw_inode->i_size_lo = cpu_to_le32(i_size);
+        raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
+}
+
+static inline
+struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
+                                                        ext4_group_t group)
+{
+         struct ext4_group_info ***grp_info;
+         long indexv, indexh;
+         grp_info = EXT4_SB(sb)->s_group_info;
+         indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
+         indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
+         return grp_info[indexv][indexh];
+}
 
 
 #define ext4_std_error(sb, errno)                               \
@@ -1048,7 +1183,7 @@ extern const struct inode_operations ext4_fast_symlink_inode_operations;
 extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
 extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
 extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
-                        ext4_fsblk_t iblock,
+                        ext4_lblk_t iblock,
                         unsigned long max_blocks, struct buffer_head *bh_result,
                         int create, int extend_disksize);
 extern void ext4_ext_truncate(struct inode *, struct page *);
@@ -1056,19 +1191,10 @@ extern void ext4_ext_init(struct super_block *);
 extern void ext4_ext_release(struct super_block *);
 extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
                           loff_t len);
-static inline int
-ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
-                        unsigned long max_blocks, struct buffer_head *bh,
-                        int create, int extend_disksize)
-{
-        if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)
-                return ext4_ext_get_blocks(handle, inode, block, max_blocks,
-                                        bh, create, extend_disksize);
-        return ext4_get_blocks_handle(handle, inode, block, max_blocks, bh,
-                                        create, extend_disksize);
-}
-
-
+extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode,
+                        sector_t block, unsigned long max_blocks,
+                        struct buffer_head *bh, int create,
+                        int extend_disksize);
 #endif  /* __KERNEL__ */
 
 #endif  /* _LINUX_EXT4_FS_H */
diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h
index d2045a26195d..697da4bce6c5 100644
--- a/include/linux/ext4_fs_extents.h
+++ b/include/linux/ext4_fs_extents.h
@@ -124,20 +124,6 @@ struct ext4_ext_path {
 #define EXT4_EXT_CACHE_GAP      1
 #define EXT4_EXT_CACHE_EXTENT   2
 
-/*
- * to be called by ext4_ext_walk_space()
- * negative retcode - error
- * positive retcode - signal for ext4_ext_walk_space(), see below
- * callback must return valid extent (passed or newly created)
- */
-typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *,
-                                        struct ext4_ext_cache *,
-                                        void *);
-
-#define EXT_CONTINUE    0
-#define EXT_BREAK       1
-#define EXT_REPEAT      2
-
 
 #define EXT_MAX_BLOCK   0xffffffff
 
@@ -226,6 +212,8 @@ static inline int ext4_ext_get_actual_len(struct ext4_extent *ext)
                 (le16_to_cpu(ext->ee_len) - EXT_INIT_MAX_LEN));
 }
 
+extern ext4_fsblk_t idx_pblock(struct ext4_extent_idx *);
+extern void ext4_ext_store_pblock(struct ext4_extent *, ext4_fsblk_t);
 extern int ext4_extent_tree_init(handle_t *, struct inode *);
 extern int ext4_ext_calc_credits_for_insert(struct inode *, struct ext4_ext_path *);
 extern int ext4_ext_try_to_merge(struct inode *inode,
@@ -233,8 +221,11 @@ extern int ext4_ext_try_to_merge(struct inode *inode,
                                  struct ext4_extent *);
 extern unsigned int ext4_ext_check_overlap(struct inode *, struct ext4_extent *, struct ext4_ext_path *);
 extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *);
-extern int ext4_ext_walk_space(struct inode *, unsigned long, unsigned long, ext_prepare_callback, void *);
-extern struct ext4_ext_path * ext4_ext_find_extent(struct inode *, int, struct ext4_ext_path *);
-
+extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
+                                                        struct ext4_ext_path *);
+extern int ext4_ext_search_left(struct inode *, struct ext4_ext_path *,
+                                                ext4_lblk_t *, ext4_fsblk_t *);
+extern int ext4_ext_search_right(struct inode *, struct ext4_ext_path *,
+                                                ext4_lblk_t *, ext4_fsblk_t *);
 #endif /* _LINUX_EXT4_EXTENTS */
 
diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h
index 86ddfe2089f3..d5508d3cf290 100644
--- a/include/linux/ext4_fs_i.h
+++ b/include/linux/ext4_fs_i.h
@@ -27,6 +27,12 @@ typedef int ext4_grpblk_t;
 /* data type for filesystem-wide blocks number */
 typedef unsigned long long ext4_fsblk_t;
 
+/* data type for file logical block number */
+typedef __u32 ext4_lblk_t;
+
+/* data type for block group number */
+typedef unsigned long ext4_group_t;
+
 struct ext4_reserve_window {
         ext4_fsblk_t    _rsv_start;     /* First byte reserved */
         ext4_fsblk_t    _rsv_end;       /* Last byte reserved or 0 */
@@ -48,7 +54,7 @@ struct ext4_block_alloc_info {
          * most-recently-allocated block in this file.
          * We use this for detecting linearly ascending allocation requests.
          */
-        __u32 last_alloc_logical_block;
+        ext4_lblk_t last_alloc_logical_block;
         /*
          * Was i_next_alloc_goal in ext4_inode_info
          * is the *physical* companion to i_next_alloc_block.
@@ -67,7 +73,7 @@ struct ext4_block_alloc_info {
  */
 struct ext4_ext_cache {
         ext4_fsblk_t    ec_start;
-        __u32           ec_block;
+        ext4_lblk_t     ec_block;
         __u32           ec_len; /* must be 32bit to return holes */
         __u32           ec_type;
 };
@@ -79,7 +85,6 @@ struct ext4_inode_info {
         __le32  i_data[15];     /* unconverted */
         __u32   i_flags;
         ext4_fsblk_t    i_file_acl;
-        __u32   i_dir_acl;
         __u32   i_dtime;
 
         /*
@@ -89,13 +94,13 @@ struct ext4_inode_info {
          * place a file's data blocks near its inode block, and new inodes
          * near to their parent directory's inode.
          */
-        __u32   i_block_group;
+        ext4_group_t    i_block_group;
         __u32   i_state;                /* Dynamic state flags for ext4 */
 
         /* block reservation info */
         struct ext4_block_alloc_info *i_block_alloc_info;
 
-        __u32   i_dir_start_lookup;
+        ext4_lblk_t             i_dir_start_lookup;
 #ifdef CONFIG_EXT4DEV_FS_XATTR
         /*
          * Extended attributes can be read independently of the main file
@@ -134,16 +139,16 @@ struct ext4_inode_info {
         __u16 i_extra_isize;
 
         /*
-         * truncate_mutex is for serialising ext4_truncate() against
+         * i_data_sem is for serialising ext4_truncate() against
          * ext4_getblock().  In the 2.4 ext2 design, great chunks of inode's
          * data tree are chopped off during truncate. We can't do that in
          * ext4 because whenever we perform intermediate commits during
          * truncate, the inode and all the metadata blocks *must* be in a
          * consistent state which allows truncation of the orphans to restart
          * during recovery.  Hence we must fix the get_block-vs-truncate race
-         * by other means, so we have truncate_mutex.
+         * by other means, so we have i_data_sem.
          */
-        struct mutex truncate_mutex;
+        struct rw_semaphore i_data_sem;
         struct inode vfs_inode;
 
         unsigned long i_ext_generation;
@@ -153,6 +158,10 @@ struct ext4_inode_info {
          * struct timespec i_{a,c,m}time in the generic inode.
          */
         struct timespec i_crtime;
+
+        /* mballoc */
+        struct list_head i_prealloc_list;
+        spinlock_t i_prealloc_lock;
 };
 
 #endif  /* _LINUX_EXT4_FS_I */
diff --git a/include/linux/ext4_fs_sb.h b/include/linux/ext4_fs_sb.h
index b40e827cd495..abaae2c8cccf 100644
--- a/include/linux/ext4_fs_sb.h
+++ b/include/linux/ext4_fs_sb.h
@@ -35,9 +35,10 @@ struct ext4_sb_info {
         unsigned long s_itb_per_group;  /* Number of inode table blocks per group */
         unsigned long s_gdb_count;      /* Number of group descriptor blocks */
         unsigned long s_desc_per_block; /* Number of group descriptors per block */
-        unsigned long s_groups_count;   /* Number of groups in the fs */
+        ext4_group_t s_groups_count;    /* Number of groups in the fs */
         unsigned long s_overhead_last;  /* Last calculated overhead */
         unsigned long s_blocks_last;    /* Last seen block count */
+        loff_t s_bitmap_maxbytes;       /* max bytes for bitmap files */
         struct buffer_head * s_sbh;     /* Buffer containing the super block */
         struct ext4_super_block * s_es; /* Pointer to the super block in the buffer */
         struct buffer_head ** s_group_desc;
@@ -90,6 +91,58 @@ struct ext4_sb_info {
         unsigned long s_ext_blocks;
         unsigned long s_ext_extents;
 #endif
+
+        /* for buddy allocator */
+        struct ext4_group_info ***s_group_info;
+        struct inode *s_buddy_cache;
+        long s_blocks_reserved;
+        spinlock_t s_reserve_lock;
+        struct list_head s_active_transaction;
+        struct list_head s_closed_transaction;
+        struct list_head s_committed_transaction;
+        spinlock_t s_md_lock;
+        tid_t s_last_transaction;
+        unsigned short *s_mb_offsets, *s_mb_maxs;
+
+        /* tunables */
+        unsigned long s_stripe;
+        unsigned long s_mb_stream_request;
+        unsigned long s_mb_max_to_scan;
+        unsigned long s_mb_min_to_scan;
+        unsigned long s_mb_stats;
+        unsigned long s_mb_order2_reqs;
+        unsigned long s_mb_group_prealloc;
+        /* where last allocation was done - for stream allocation */
+        unsigned long s_mb_last_group;
+        unsigned long s_mb_last_start;
+
+        /* history to debug policy */
+        struct ext4_mb_history *s_mb_history;
+        int s_mb_history_cur;
+        int s_mb_history_max;
+        int s_mb_history_num;
+        struct proc_dir_entry *s_mb_proc;
+        spinlock_t s_mb_history_lock;
+        int s_mb_history_filter;
+
+        /* stats for buddy allocator */
+        spinlock_t s_mb_pa_lock;
+        atomic_t s_bal_reqs;    /* number of reqs with len > 1 */
+        atomic_t s_bal_success; /* we found long enough chunks */
+        atomic_t s_bal_allocated;       /* in blocks */
+        atomic_t s_bal_ex_scanned;      /* total extents scanned */
+        atomic_t s_bal_goals;   /* goal hits */
+        atomic_t s_bal_breaks;  /* too long searches */
+        atomic_t s_bal_2orders; /* 2^order hits */
+        spinlock_t s_bal_lock;
+        unsigned long s_mb_buddies_generated;
+        unsigned long long s_mb_generation_time;
+        atomic_t s_mb_lost_chunks;
+        atomic_t s_mb_preallocated;
+        atomic_t s_mb_discarded;
+
+        /* locality groups */
+        struct ext4_locality_group *s_locality_groups;
 };
 
 #endif  /* _LINUX_EXT4_FS_SB */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 21398a5d688d..a516b6716870 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -124,6 +124,7 @@ extern int dir_notify_enable;
 #define MS_SHARED       (1<<20) /* change to shared */
 #define MS_RELATIME     (1<<21) /* Update atime relative to mtime/ctime. */
 #define MS_KERNMOUNT    (1<<22) /* this is a kern_mount call */
+#define MS_I_VERSION    (1<<23) /* Update inode I_version field */
 #define MS_ACTIVE       (1<<30)
 #define MS_NOUSER       (1<<31)
 
@@ -173,6 +174,7 @@ extern int dir_notify_enable;
                                         ((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
 #define IS_MANDLOCK(inode)      __IS_FLG(inode, MS_MANDLOCK)
 #define IS_NOATIME(inode)   __IS_FLG(inode, MS_RDONLY|MS_NOATIME)
+#define IS_I_VERSION(inode)   __IS_FLG(inode, MS_I_VERSION)
 
 #define IS_NOQUOTA(inode)       ((inode)->i_flags & S_NOQUOTA)
 #define IS_APPEND(inode)        ((inode)->i_flags & S_APPEND)
@@ -599,7 +601,7 @@ struct inode {
         uid_t                   i_uid;
         gid_t                   i_gid;
         dev_t                   i_rdev;
-        unsigned long           i_version;
+        u64                     i_version;
         loff_t                  i_size;
 #ifdef __NEED_I_SIZE_ORDERED
         seqcount_t              i_size_seqcount;
@@ -1394,6 +1396,21 @@ static inline void inode_dec_link_count(struct inode *inode)
         mark_inode_dirty(inode);
 }
 
+/**
+ * inode_inc_iversion - increments i_version
+ * @inode: inode that need to be updated
+ *
+ * Every time the inode is modified, the i_version field will be incremented.
+ * The filesystem has to be mounted with i_version flag
+ */
+
+static inline void inode_inc_iversion(struct inode *inode)
+{
+       spin_lock(&inode->i_lock);
+       inode->i_version++;
+       spin_unlock(&inode->i_lock);
+}
+
 extern void touch_atime(struct vfsmount *mnt, struct dentry *dentry);
 static inline void file_accessed(struct file *file)
 {
diff --git a/include/linux/init.h b/include/linux/init.h
index 5141381a7527..2efbda016741 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -40,10 +40,10 @@
 
 /* These are for everybody (although not all archs will actually
    discard it in modules) */
-#define __init          __attribute__ ((__section__ (".init.text"))) __cold
-#define __initdata      __attribute__ ((__section__ (".init.data")))
-#define __exitdata      __attribute__ ((__section__(".exit.data")))
-#define __exit_call     __attribute_used__ __attribute__ ((__section__ (".exitcall.exit")))
+#define __init          __section(.init.text) __cold
+#define __initdata      __section(.init.data)
+#define __exitdata      __section(.exit.data)
+#define __exit_call     __used __section(.exitcall.exit)
 
 /* modpost check for section mismatches during the kernel build.
  * A section mismatch happens when there are references from a
@@ -52,25 +52,81 @@
  * when early init has completed so all such references are potential bugs.
  * For exit sections the same issue exists.
  * The following markers are used for the cases where the reference to
- * the init/exit section (code or data) is valid and will teach modpost
- * not to issue a warning.
+ * the *init / *exit section (code or data) is valid and will teach
+ * modpost not to issue a warning.
  * The markers follow same syntax rules as __init / __initdata. */
-#define __init_refok     noinline __attribute__ ((__section__ (".text.init.refok")))
-#define __initdata_refok          __attribute__ ((__section__ (".data.init.refok")))
-#define __exit_refok     noinline __attribute__ ((__section__ (".exit.text.refok")))
+#define __ref            __section(.ref.text) noinline
+#define __refdata        __section(.ref.data)
+#define __refconst       __section(.ref.rodata)
+
+/* backward compatibility note
+ *  A few places hardcode the old section names:
+ *  .text.init.refok
+ *  .data.init.refok
+ *  .exit.text.refok
+ *  They should be converted to use the defines from this file
+ */
+
+/* compatibility defines */
+#define __init_refok     __ref
+#define __initdata_refok __refdata
+#define __exit_refok     __ref
+
 
 #ifdef MODULE
-#define __exit          __attribute__ ((__section__(".exit.text"))) __cold
+#define __exitused
 #else
-#define __exit          __attribute_used__ __attribute__ ((__section__(".exit.text"))) __cold
+#define __exitused  __used
 #endif
 
+#define __exit          __section(.exit.text) __exitused __cold
+
+/* Used for HOTPLUG */
+#define __devinit        __section(.devinit.text) __cold
+#define __devinitdata    __section(.devinit.data)
+#define __devinitconst   __section(.devinit.rodata)
+#define __devexit        __section(.devexit.text) __exitused __cold
+#define __devexitdata    __section(.devexit.data)
+#define __devexitconst   __section(.devexit.rodata)
+
+/* Used for HOTPLUG_CPU */
+#define __cpuinit        __section(.cpuinit.text) __cold
+#define __cpuinitdata    __section(.cpuinit.data)
+#define __cpuinitconst   __section(.cpuinit.rodata)
+#define __cpuexit        __section(.cpuexit.text) __exitused __cold
+#define __cpuexitdata    __section(.cpuexit.data)
+#define __cpuexitconst   __section(.cpuexit.rodata)
+
+/* Used for MEMORY_HOTPLUG */
+#define __meminit        __section(.meminit.text) __cold
+#define __meminitdata    __section(.meminit.data)
+#define __meminitconst   __section(.meminit.rodata)
+#define __memexit        __section(.memexit.text) __exitused __cold
+#define __memexitdata    __section(.memexit.data)
+#define __memexitconst   __section(.memexit.rodata)
+
 /* For assembly routines */
 #define __INIT          .section        ".init.text","ax"
-#define __INIT_REFOK    .section        ".text.init.refok","ax"
 #define __FINIT         .previous
+
 #define __INITDATA      .section        ".init.data","aw"
-#define __INITDATA_REFOK .section       ".data.init.refok","aw"
+
+#define __DEVINIT        .section       ".devinit.text", "ax"
+#define __DEVINITDATA    .section       ".devinit.data", "aw"
+
+#define __CPUINIT        .section       ".cpuinit.text", "ax"
+#define __CPUINITDATA    .section       ".cpuinit.data", "aw"
+
+#define __MEMINIT        .section       ".meminit.text", "ax"
+#define __MEMINITDATA    .section       ".meminit.data", "aw"
+
+/* silence warnings when references are OK */
+#define __REF            .section       ".ref.text", "ax"
+#define __REFDATA        .section       ".ref.data", "aw"
+#define __REFCONST       .section       ".ref.rodata", "aw"
+/* backward compatibility */
+#define __INIT_REFOK     .section       __REF
+#define __INITDATA_REFOK .section       __REFDATA
 
 #ifndef __ASSEMBLY__
 /*
@@ -108,7 +164,7 @@ void prepare_namespace(void);
  */
 
 #define __define_initcall(level,fn,id) \
-        static initcall_t __initcall_##fn##id __attribute_used__ \
+        static initcall_t __initcall_##fn##id __used \
         __attribute__((__section__(".initcall" level ".init"))) = fn
 
 /*
@@ -142,11 +198,11 @@ void prepare_namespace(void);
 
 #define console_initcall(fn) \
         static initcall_t __initcall_##fn \
-        __attribute_used__ __attribute__((__section__(".con_initcall.init")))=fn
+        __used __section(.con_initcall.init) = fn
 
 #define security_initcall(fn) \
         static initcall_t __initcall_##fn \
-        __attribute_used__ __attribute__((__section__(".security_initcall.init"))) = fn
+        __used __section(.security_initcall.init) = fn
 
 struct obs_kernel_param {
         const char *str;
@@ -163,8 +219,7 @@ struct obs_kernel_param {
 #define __setup_param(str, unique_id, fn, early)                        \
         static char __setup_str_##unique_id[] __initdata __aligned(1) = str; \
         static struct obs_kernel_param __setup_##unique_id      \
-                __attribute_used__                              \
-                __attribute__((__section__(".init.setup")))     \
+                __used __section(.init.setup)                   \
                 __attribute__((aligned((sizeof(long)))))        \
                 = { __setup_str_##unique_id, fn, early }
 
@@ -242,7 +297,7 @@ void __init parse_early_param(void);
 #endif
 
 /* Data marked not to be saved by software suspend */
-#define __nosavedata __attribute__ ((__section__ (".data.nosave")))
+#define __nosavedata __section(.data.nosave)
 
 /* This means "can be init if no module support, otherwise module load
    may call it." */
@@ -254,43 +309,6 @@ void __init parse_early_param(void);
 #define __initdata_or_module __initdata
 #endif /*CONFIG_MODULES*/
 
-#ifdef CONFIG_HOTPLUG
-#define __devinit
-#define __devinitdata
-#define __devexit
-#define __devexitdata
-#else
-#define __devinit __init
-#define __devinitdata __initdata
-#define __devexit __exit
-#define __devexitdata __exitdata
-#endif
-
-#ifdef CONFIG_HOTPLUG_CPU
-#define __cpuinit
-#define __cpuinitdata
-#define __cpuexit
-#define __cpuexitdata
-#else
-#define __cpuinit       __init
-#define __cpuinitdata __initdata
-#define __cpuexit __exit
-#define __cpuexitdata   __exitdata
-#endif
-
-#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) \
-        || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)
-#define __meminit
-#define __meminitdata
-#define __memexit
-#define __memexitdata
-#else
-#define __meminit       __init
-#define __meminitdata __initdata
-#define __memexit __exit
-#define __memexitdata   __exitdata
-#endif
-
 /* Functions marked as __devexit may be discarded at kernel link time, depending
    on config options.  Newer versions of binutils detect references from
    retained sections to discarded sections and flag an error.  Pointers to
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 06ef11457051..2cbf6fdb1799 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -149,6 +149,28 @@ typedef struct journal_header_s
         __be32          h_sequence;
 } journal_header_t;
 
+/*
+ * Checksum types.
+ */
+#define JBD2_CRC32_CHKSUM   1
+#define JBD2_MD5_CHKSUM     2
+#define JBD2_SHA1_CHKSUM    3
+
+#define JBD2_CRC32_CHKSUM_SIZE 4
+
+#define JBD2_CHECKSUM_BYTES (32 / sizeof(u32))
+/*
+ * Commit block header for storing transactional checksums:
+ */
+struct commit_header {
+        __be32          h_magic;
+        __be32          h_blocktype;
+        __be32          h_sequence;
+        unsigned char   h_chksum_type;
+        unsigned char   h_chksum_size;
+        unsigned char   h_padding[2];
+        __be32          h_chksum[JBD2_CHECKSUM_BYTES];
+};
 
 /*
  * The block tag: used to describe a single buffer in the journal.
@@ -242,31 +264,25 @@ typedef struct journal_superblock_s
         ((j)->j_format_version >= 2 &&                                  \
          ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask))))
 
-#define JBD2_FEATURE_INCOMPAT_REVOKE    0x00000001
-#define JBD2_FEATURE_INCOMPAT_64BIT     0x00000002
+#define JBD2_FEATURE_COMPAT_CHECKSUM    0x00000001
+
+#define JBD2_FEATURE_INCOMPAT_REVOKE            0x00000001
+#define JBD2_FEATURE_INCOMPAT_64BIT             0x00000002
+#define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT      0x00000004
 
 /* Features known to this kernel version: */
-#define JBD2_KNOWN_COMPAT_FEATURES      0
+#define JBD2_KNOWN_COMPAT_FEATURES      JBD2_FEATURE_COMPAT_CHECKSUM
 #define JBD2_KNOWN_ROCOMPAT_FEATURES    0
 #define JBD2_KNOWN_INCOMPAT_FEATURES    (JBD2_FEATURE_INCOMPAT_REVOKE | \
-                                         JBD2_FEATURE_INCOMPAT_64BIT)
+                                        JBD2_FEATURE_INCOMPAT_64BIT | \
+                                        JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)
 
 #ifdef __KERNEL__
 
 #include <linux/fs.h>
 #include <linux/sched.h>
 
-#define JBD2_ASSERTIONS
-#ifdef JBD2_ASSERTIONS
-#define J_ASSERT(assert)                                                \
-do {                                                                    \
-        if (!(assert)) {                                                \
-                printk (KERN_EMERG                                      \
-                        "Assertion failure in %s() at %s:%d: \"%s\"\n", \
-                        __FUNCTION__, __FILE__, __LINE__, # assert);    \
-                BUG();                                                  \
-        }                                                               \
-} while (0)
+#define J_ASSERT(assert)        BUG_ON(!(assert))
 
 #if defined(CONFIG_BUFFER_DEBUG)
 void buffer_assertion_failure(struct buffer_head *bh);
@@ -282,10 +298,6 @@ void buffer_assertion_failure(struct buffer_head *bh);
 #define J_ASSERT_JH(jh, expr)   J_ASSERT(expr)
 #endif
 
-#else
-#define J_ASSERT(assert)        do { } while (0)
-#endif          /* JBD2_ASSERTIONS */
-
 #if defined(JBD2_PARANOID_IOFAIL)
 #define J_EXPECT(expr, why...)          J_ASSERT(expr)
 #define J_EXPECT_BH(bh, expr, why...)   J_ASSERT_BH(bh, expr)
@@ -406,9 +418,23 @@ struct handle_s
         unsigned int    h_sync:         1;      /* sync-on-close */
         unsigned int    h_jdata:        1;      /* force data journaling */
         unsigned int    h_aborted:      1;      /* fatal error on handle */
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+        struct lockdep_map      h_lockdep_map;
+#endif
 };
 
 
+/*
+ * Some stats for checkpoint phase
+ */
+struct transaction_chp_stats_s {
+        unsigned long           cs_chp_time;
+        unsigned long           cs_forced_to_close;
+        unsigned long           cs_written;
+        unsigned long           cs_dropped;
+};
+
 /* The transaction_t type is the guts of the journaling mechanism.  It
  * tracks a compound transaction through its various states:
  *
@@ -456,6 +482,8 @@ struct transaction_s
         /*
          * Transaction's current state
          * [no locking - only kjournald2 alters this]
+         * [j_list_lock] guards transition of a transaction into T_FINISHED
+         * state and subsequent call of __jbd2_journal_drop_transaction()
          * FIXME: needs barriers
          * KLUDGE: [use j_state_lock]
          */
@@ -544,6 +572,21 @@ struct transaction_s
         spinlock_t              t_handle_lock;
 
         /*
+         * Longest time some handle had to wait for running transaction
+         */
+        unsigned long           t_max_wait;
+
+        /*
+         * When transaction started
+         */
+        unsigned long           t_start;
+
+        /*
+         * Checkpointing stats [j_checkpoint_sem]
+         */
+        struct transaction_chp_stats_s t_chp_stats;
+
+        /*
          * Number of outstanding updates running on this transaction
          * [t_handle_lock]
          */
@@ -574,6 +617,39 @@ struct transaction_s
 
 };
 
+struct transaction_run_stats_s {
+        unsigned long           rs_wait;
+        unsigned long           rs_running;
+        unsigned long           rs_locked;
+        unsigned long           rs_flushing;
+        unsigned long           rs_logging;
+
+        unsigned long           rs_handle_count;
+        unsigned long           rs_blocks;
+        unsigned long           rs_blocks_logged;
+};
+
+struct transaction_stats_s {
+        int                     ts_type;
+        unsigned long           ts_tid;
+        union {
+                struct transaction_run_stats_s run;
+                struct transaction_chp_stats_s chp;
+        } u;
+};
+
+#define JBD2_STATS_RUN          1
+#define JBD2_STATS_CHECKPOINT   2
+
+static inline unsigned long
+jbd2_time_diff(unsigned long start, unsigned long end)
+{
+        if (end >= start)
+                return end - start;
+
+        return end + (MAX_JIFFY_OFFSET - start);
+}
+
 /**
  * struct journal_s - The journal_s type is the concrete type associated with
  *     journal_t.
@@ -635,6 +711,12 @@ struct transaction_s
  * @j_wbufsize: maximum number of buffer_heads allowed in j_wbuf, the
  *      number that will fit in j_blocksize
  * @j_last_sync_writer: most recent pid which did a synchronous write
+ * @j_history: Buffer storing the transactions statistics history
+ * @j_history_max: Maximum number of transactions in the statistics history
+ * @j_history_cur: Current number of transactions in the statistics history
+ * @j_history_lock: Protect the transactions statistics history
+ * @j_proc_entry: procfs entry for the jbd statistics directory
+ * @j_stats: Overall statistics
  * @j_private: An opaque pointer to fs-private information.
  */
 
@@ -827,6 +909,19 @@ struct journal_s
         pid_t                   j_last_sync_writer;
 
         /*
+         * Journal statistics
+         */
+        struct transaction_stats_s *j_history;
+        int                     j_history_max;
+        int                     j_history_cur;
+        /*
+         * Protect the transactions statistics history
+         */
+        spinlock_t              j_history_lock;
+        struct proc_dir_entry   *j_proc_entry;
+        struct transaction_stats_s j_stats;
+
+        /*
          * An opaque pointer to fs-private information.  ext3 puts its
          * superblock pointer here
          */
@@ -932,6 +1027,8 @@ extern int	   jbd2_journal_check_available_features
                    (journal_t *, unsigned long, unsigned long, unsigned long);
 extern int         jbd2_journal_set_features
                    (journal_t *, unsigned long, unsigned long, unsigned long);
+extern void        jbd2_journal_clear_features
+                   (journal_t *, unsigned long, unsigned long, unsigned long);
 extern int         jbd2_journal_create     (journal_t *);
 extern int         jbd2_journal_load       (journal_t *journal);
 extern void        jbd2_journal_destroy    (journal_t *);
diff --git a/include/linux/module.h b/include/linux/module.h
index c97bdb7eb957..ac481e2094fd 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -178,7 +178,7 @@ void *__symbol_get_gpl(const char *symbol);
 #define __CRC_SYMBOL(sym, sec)                                  \
         extern void *__crc_##sym __attribute__((weak));         \
         static const unsigned long __kcrctab_##sym              \
-        __attribute_used__                                      \
+        __used                                                  \
         __attribute__((section("__kcrctab" sec), unused))       \
         = (unsigned long) &__crc_##sym;
 #else
@@ -193,7 +193,7 @@ void *__symbol_get_gpl(const char *symbol);
         __attribute__((section("__ksymtab_strings")))           \
         = MODULE_SYMBOL_PREFIX #sym;                            \
         static const struct kernel_symbol __ksymtab_##sym       \
-        __attribute_used__                                      \
+        __used                                                  \
         __attribute__((section("__ksymtab" sec), unused))       \
         = { (unsigned long)&sym, __kstrtab_##sym }
 
@@ -446,11 +446,14 @@ static inline void __module_get(struct module *module)
         __mod ? __mod->name : "kernel";         \
 })
 
-/* For kallsyms to ask for address resolution.  NULL means not found. */
-const char *module_address_lookup(unsigned long addr,
-                                  unsigned long *symbolsize,
-                                  unsigned long *offset,
-                                  char **modname);
+/* For kallsyms to ask for address resolution.  namebuf should be at
+ * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
+ * found, otherwise NULL. */
+char *module_address_lookup(unsigned long addr,
+                            unsigned long *symbolsize,
+                            unsigned long *offset,
+                            char **modname,
+                            char *namebuf);
 int lookup_module_symbol_name(unsigned long addr, char *symname);
 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 
@@ -516,10 +519,11 @@ static inline void module_put(struct module *module)
 #define module_name(mod) "kernel"
 
 /* For kallsyms to ask for address resolution.  NULL means not found. */
-static inline const char *module_address_lookup(unsigned long addr,
-                                                unsigned long *symbolsize,
-                                                unsigned long *offset,
-                                                char **modname)
+static inline char *module_address_lookup(unsigned long addr,
+                                          unsigned long *symbolsize,
+                                          unsigned long *offset,
+                                          char **modname,
+                                          char *namebuf)
 {
         return NULL;
 }
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 13410b20600f..8126e55c5bdc 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -18,7 +18,7 @@
 #define __module_cat(a,b) ___module_cat(a,b)
 #define __MODULE_INFO(tag, name, info)                                    \
 static const char __module_cat(name,__LINE__)[]                           \
-  __attribute_used__                                                      \
+  __used                                                                  \
   __attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
 #else  /* !MODULE */
 #define __MODULE_INFO(tag, name, info)
@@ -72,7 +72,7 @@ struct kparam_array
         BUILD_BUG_ON_ZERO((perm) < 0 || (perm) > 0777 || ((perm) & 2)); \
         static const char __param_str_##name[] = prefix #name;          \
         static struct kernel_param const __param_##name                 \
-        __attribute_used__                                              \
+        __used                                                          \
     __attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \
         = { __param_str_##name, perm, set, get, { arg } }
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 0dd93bb62fbe..ae1006322f80 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -867,7 +867,7 @@ enum pci_fixup_pass {
 
 /* Anonymous variables would be nice... */
 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook)  \
-        static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
+        static const struct pci_fixup __pci_fixup_##name __used         \
         __attribute__((__section__(#section))) = { vendor, device, hook };
 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)                   \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,                     \
diff --git a/init/Kconfig b/init/Kconfig
index 288444b4cd8a..0d0bbf218f1f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1,3 +1,11 @@
+config ARCH
+        string
+        option env="ARCH"
+
+config KERNELVERSION
+        string
+        option env="KERNELVERSION"
+
 config DEFCONFIG_LIST
         string
         depends on !UML
diff --git a/kernel/extable.c b/kernel/extable.c
index 7fe262855317..a26cb2e17023 100644
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -46,7 +46,8 @@ int core_kernel_text(unsigned long addr)
             addr <= (unsigned long)_etext)
                 return 1;
 
-        if (addr >= (unsigned long)_sinittext &&
+        if (system_state == SYSTEM_BOOTING &&
+            addr >= (unsigned long)_sinittext &&
             addr <= (unsigned long)_einittext)
                 return 1;
         return 0;
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 2fc25810509e..7dadc71ce516 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -233,10 +233,11 @@ static unsigned long get_symbol_pos(unsigned long addr,
 int kallsyms_lookup_size_offset(unsigned long addr, unsigned long *symbolsize,
                                 unsigned long *offset)
 {
+        char namebuf[KSYM_NAME_LEN];
         if (is_ksym_addr(addr))
                 return !!get_symbol_pos(addr, symbolsize, offset);
 
-        return !!module_address_lookup(addr, symbolsize, offset, NULL);
+        return !!module_address_lookup(addr, symbolsize, offset, NULL, namebuf);
 }
 
 /*
@@ -251,8 +252,6 @@ const char *kallsyms_lookup(unsigned long addr,
                             unsigned long *offset,
                             char **modname, char *namebuf)
 {
-        const char *msym;
-
         namebuf[KSYM_NAME_LEN - 1] = 0;
         namebuf[0] = 0;
 
@@ -268,10 +267,8 @@ const char *kallsyms_lookup(unsigned long addr,
         }
 
         /* see if it's in a module */
-        msym = module_address_lookup(addr, symbolsize, offset, modname);
-        if (msym)
-                return strncpy(namebuf, msym, KSYM_NAME_LEN - 1);
-
+        return module_address_lookup(addr, symbolsize, offset, modname,
+                                     namebuf);
         return NULL;
 }
 
diff --git a/kernel/module.c b/kernel/module.c
index 1bb4c5e0d56e..f6a4e721fd49 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -65,6 +65,9 @@
 static DEFINE_MUTEX(module_mutex);
 static LIST_HEAD(modules);
 
+/* Waiting for a module to finish initializing? */
+static DECLARE_WAIT_QUEUE_HEAD(module_wq);
+
 static BLOCKING_NOTIFIER_HEAD(module_notify_list);
 
 int register_module_notifier(struct notifier_block * nb)
@@ -84,8 +87,11 @@ EXPORT_SYMBOL(unregister_module_notifier);
 static inline int strong_try_module_get(struct module *mod)
 {
         if (mod && mod->state == MODULE_STATE_COMING)
+                return -EBUSY;
+        if (try_module_get(mod))
                 return 0;
-        return try_module_get(mod);
+        else
+                return -ENOENT;
 }
 
 static inline void add_taint_module(struct module *mod, unsigned flag)
@@ -539,11 +545,21 @@ static int already_uses(struct module *a, struct module *b)
 static int use_module(struct module *a, struct module *b)
 {
         struct module_use *use;
-        int no_warn;
+        int no_warn, err;
 
         if (b == NULL || already_uses(a, b)) return 1;
 
-        if (!strong_try_module_get(b))
+        /* If we're interrupted or time out, we fail. */
+        if (wait_event_interruptible_timeout(
+                    module_wq, (err = strong_try_module_get(b)) != -EBUSY,
+                    30 * HZ) <= 0) {
+                printk("%s: gave up waiting for init of module %s.\n",
+                       a->name, b->name);
+                return 0;
+        }
+
+        /* If strong_try_module_get() returned a different error, we fail. */
+        if (err)
                 return 0;
 
         DEBUGP("Allocating new usage for %s.\n", a->name);
@@ -722,7 +738,7 @@ sys_delete_module(const char __user *name_user, unsigned int flags)
                 mutex_lock(&module_mutex);
         }
         /* Store the name of the last unloaded module for diagnostic purposes */
-        sprintf(last_unloaded_module, mod->name);
+        strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
         free_module(mod);
 
  out:
@@ -816,7 +832,7 @@ static inline void module_unload_free(struct module *mod)
 
 static inline int use_module(struct module *a, struct module *b)
 {
-        return strong_try_module_get(b);
+        return strong_try_module_get(b) == 0;
 }
 
 static inline void module_unload_init(struct module *mod)
@@ -1214,6 +1230,7 @@ void module_remove_modinfo_attrs(struct module *mod)
 int mod_sysfs_init(struct module *mod)
 {
         int err;
+        struct kobject *kobj;
 
         if (!module_sysfs_initialized) {
                 printk(KERN_ERR "%s: module sysfs not initialized\n",
@@ -1221,6 +1238,15 @@ int mod_sysfs_init(struct module *mod)
                 err = -EINVAL;
                 goto out;
         }
+
+        kobj = kset_find_obj(module_kset, mod->name);
+        if (kobj) {
+                printk(KERN_ERR "%s: module is already loaded\n", mod->name);
+                kobject_put(kobj);
+                err = -EINVAL;
+                goto out;
+        }
+
         mod->mkobj.mod = mod;
 
         memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
@@ -1278,6 +1304,17 @@ static void mod_kobject_remove(struct module *mod)
 }
 
 /*
+ * link the module with the whole machine is stopped with interrupts off
+ * - this defends against kallsyms not taking locks
+ */
+static int __link_module(void *_mod)
+{
+        struct module *mod = _mod;
+        list_add(&mod->list, &modules);
+        return 0;
+}
+
+/*
  * unlink the module with the whole machine is stopped with interrupts off
  * - this defends against kallsyms not taking locks
  */
@@ -1326,7 +1363,7 @@ void *__symbol_get(const char *symbol)
 
         preempt_disable();
         value = __find_symbol(symbol, &owner, &crc, 1);
-        if (value && !strong_try_module_get(owner))
+        if (value && strong_try_module_get(owner) != 0)
                 value = 0;
         preempt_enable();
 
@@ -1889,7 +1926,7 @@ static struct module *load_module(void __user *umod,
         set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
 
         if (strcmp(mod->name, "ndiswrapper") == 0)
-                add_taint(TAINT_PROPRIETARY_MODULE);
+                add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
         if (strcmp(mod->name, "driverloader") == 0)
                 add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
 
@@ -2019,6 +2056,11 @@ static struct module *load_module(void __user *umod,
                 printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
                        mod->name);
 
+        /* Now sew it into the lists so we can get lockdep and oops
+         * info during argument parsing.  Noone should access us, since
+         * strong_try_module_get() will fail. */
+        stop_machine_run(__link_module, mod, NR_CPUS);
+
         /* Size of section 0 is 0, so this works well if no params */
         err = parse_args(mod->name, mod->args,
                          (struct kernel_param *)
@@ -2027,7 +2069,7 @@ static struct module *load_module(void __user *umod,
                          / sizeof(struct kernel_param),
                          NULL);
         if (err < 0)
-                goto arch_cleanup;
+                goto unlink;
 
         err = mod_sysfs_setup(mod,
                               (struct kernel_param *)
@@ -2035,7 +2077,7 @@ static struct module *load_module(void __user *umod,
                               sechdrs[setupindex].sh_size
                               / sizeof(struct kernel_param));
         if (err < 0)
-                goto arch_cleanup;
+                goto unlink;
         add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
         add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
 
@@ -2050,7 +2092,8 @@ static struct module *load_module(void __user *umod,
         /* Done! */
         return mod;
 
- arch_cleanup:
+ unlink:
+        stop_machine_run(__unlink_module, mod, NR_CPUS);
         module_arch_cleanup(mod);
  cleanup:
         kobject_del(&mod->mkobj.kobj);
@@ -2075,17 +2118,6 @@ static struct module *load_module(void __user *umod,
         goto free_hdr;
 }
 
-/*
- * link the module with the whole machine is stopped with interrupts off
- * - this defends against kallsyms not taking locks
- */
-static int __link_module(void *_mod)
-{
-        struct module *mod = _mod;
-        list_add(&mod->list, &modules);
-        return 0;
-}
-
 /* This is where the real work happens */
 asmlinkage long
 sys_init_module(void __user *umod,
@@ -2110,10 +2142,6 @@ sys_init_module(void __user *umod,
                 return PTR_ERR(mod);
         }
 
-        /* Now sew it into the lists.  They won't access us, since
-           strong_try_module_get() will fail. */
-        stop_machine_run(__link_module, mod, NR_CPUS);
-
         /* Drop lock so they can recurse */
         mutex_unlock(&module_mutex);
 
@@ -2132,6 +2160,7 @@ sys_init_module(void __user *umod,
                 mutex_lock(&module_mutex);
                 free_module(mod);
                 mutex_unlock(&module_mutex);
+                wake_up(&module_wq);
                 return ret;
         }
 
@@ -2146,6 +2175,7 @@ sys_init_module(void __user *umod,
         mod->init_size = 0;
         mod->init_text_size = 0;
         mutex_unlock(&module_mutex);
+        wake_up(&module_wq);
 
         return 0;
 }
@@ -2210,14 +2240,13 @@ static const char *get_ksymbol(struct module *mod,
         return mod->strtab + mod->symtab[best].st_name;
 }
 
-/* For kallsyms to ask for address resolution.  NULL means not found.
-   We don't lock, as this is used for oops resolution and races are a
-   lesser concern. */
-/* FIXME: Risky: returns a pointer into a module w/o lock */
-const char *module_address_lookup(unsigned long addr,
-                                  unsigned long *size,
-                                  unsigned long *offset,
-                                  char **modname)
+/* For kallsyms to ask for address resolution.  NULL means not found.  Careful
+ * not to lock to avoid deadlock on oopses, simply disable preemption. */
+char *module_address_lookup(unsigned long addr,
+                            unsigned long *size,
+                            unsigned long *offset,
+                            char **modname,
+                            char *namebuf)
 {
         struct module *mod;
         const char *ret = NULL;
@@ -2232,8 +2261,13 @@ const char *module_address_lookup(unsigned long addr,
                         break;
                 }
         }
+        /* Make a copy in here where it's safe */
+        if (ret) {
+                strncpy(namebuf, ret, KSYM_NAME_LEN - 1);
+                ret = namebuf;
+        }
         preempt_enable();
-        return ret;
+        return (char *)ret;
 }
 
 int lookup_module_symbol_name(unsigned long addr, char *symname)
diff --git a/kernel/params.c b/kernel/params.c
index 67f65ee7211d..42fe5e6126c0 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -376,8 +376,6 @@ int param_get_string(char *buffer, struct kernel_param *kp)
 
 extern struct kernel_param __start___param[], __stop___param[];
 
-#define MAX_KBUILD_MODNAME KOBJ_NAME_LEN
-
 struct param_attribute
 {
         struct module_attribute mattr;
@@ -587,7 +585,7 @@ static void __init param_sysfs_builtin(void)
 {
         struct kernel_param *kp, *kp_begin = NULL;
         unsigned int i, name_len, count = 0;
-        char modname[MAX_KBUILD_MODNAME + 1] = "";
+        char modname[MODULE_NAME_LEN + 1] = "";
 
         for (i=0; i < __stop___param - __start___param; i++) {
                 char *dot;
@@ -595,12 +593,12 @@ static void __init param_sysfs_builtin(void)
 
                 kp = &__start___param[i];
                 max_name_len =
-                        min_t(size_t, MAX_KBUILD_MODNAME, strlen(kp->name));
+                        min_t(size_t, MODULE_NAME_LEN, strlen(kp->name));
 
                 dot = memchr(kp->name, '.', max_name_len);
                 if (!dot) {
                         DEBUGP("couldn't find period in first %d characters "
-                               "of %s\n", MAX_KBUILD_MODNAME, kp->name);
+                               "of %s\n", MODULE_NAME_LEN, kp->name);
                         continue;
                 }
                 name_len = dot - kp->name;
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 14fb355e3caa..c4ecb2994ba3 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -79,6 +79,38 @@ config HEADERS_CHECK
           exported to $(INSTALL_HDR_PATH) (usually 'usr/include' in
           your build tree), to make sure they're suitable.
 
+config DEBUG_SECTION_MISMATCH
+        bool "Enable full Section mismatch analysis"
+        default n
+        help
+          The section mismatch analysis checks if there are illegal
+          references from one section to another section.
+          Linux will during link or during runtime drop some sections
+          and any use of code/data previously in these sections will
+          most likely result in an oops.
+          In the code functions and variables are annotated with
+          __init, __devinit etc. (see full list in include/linux/init.h)
+          which result in the code/data being placed in specific sections.
+          The section mismatch anaylsis are always done after a full
+          kernel build but enabling this options will in addition
+          do the following:
+          - Add the option -fno-inline-functions-called-once to gcc
+            When inlining a function annotated __init in a non-init
+            function we would loose the section information and thus
+            the analysis would not catch the illegal reference.
+            This options tell gcc to inline less but will also
+            result in a larger kernel.
+          - Run the section mismatch analysis for each module/built-in.o
+            When we run the section mismatch analysis on vmlinux.o we
+            looses valueable information about where the mismatch was
+            introduced.
+            Running the analysis for each module/built-in.o file
+            will tell where the mismatch happens much closer to the
+            source. The drawback is that we will report the same
+            mismatch at least twice.
+          - Enable verbose reporting from modpost to help solving
+            the section mismatches reported.
+
 config DEBUG_KERNEL
         bool "Kernel debugging"
         help
diff --git a/lib/find_next_bit.c b/lib/find_next_bit.c
index bda0d71a2514..78ccd73a8841 100644
--- a/lib/find_next_bit.c
+++ b/lib/find_next_bit.c
@@ -178,4 +178,47 @@ found_middle_swap:
 
 EXPORT_SYMBOL(generic_find_next_zero_le_bit);
 
+unsigned long generic_find_next_le_bit(const unsigned long *addr, unsigned
+                long size, unsigned long offset)
+{
+        const unsigned long *p = addr + BITOP_WORD(offset);
+        unsigned long result = offset & ~(BITS_PER_LONG - 1);
+        unsigned long tmp;
+
+        if (offset >= size)
+                return size;
+        size -= result;
+        offset &= (BITS_PER_LONG - 1UL);
+        if (offset) {
+                tmp = ext2_swabp(p++);
+                tmp &= (~0UL << offset);
+                if (size < BITS_PER_LONG)
+                        goto found_first;
+                if (tmp)
+                        goto found_middle;
+                size -= BITS_PER_LONG;
+                result += BITS_PER_LONG;
+        }
+
+        while (size & ~(BITS_PER_LONG - 1)) {
+                tmp = *(p++);
+                if (tmp)
+                        goto found_middle_swap;
+                result += BITS_PER_LONG;
+                size -= BITS_PER_LONG;
+        }
+        if (!size)
+                return result;
+        tmp = ext2_swabp(p);
+found_first:
+        tmp &= (~0UL >> (BITS_PER_LONG - size));
+        if (tmp == 0UL)         /* Are any bits set? */
+                return result + size; /* Nope. */
+found_middle:
+        return result + __ffs(tmp);
+
+found_middle_swap:
+        return result + __ffs(ext2_swab(tmp));
+}
+EXPORT_SYMBOL(generic_find_next_le_bit);
 #endif /* __BIG_ENDIAN */
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index de9836eee8bb..67fb4530a6ff 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -83,10 +83,12 @@ ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target)),)
 builtin-target := $(obj)/built-in.o
 endif
 
+modorder-target := $(obj)/modules.order
+
 # We keep a list of all modules in $(MODVERDIR)
 
 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
-         $(if $(KBUILD_MODULES),$(obj-m)) \
+         $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
          $(subdir-ym) $(always)
         @:
 
@@ -101,6 +103,10 @@ ifneq ($(KBUILD_CHECKSRC),0)
   endif
 endif
 
+# Do section mismatch analysis for each module/built-in.o
+ifdef CONFIG_DEBUG_SECTION_MISMATCH
+  cmd_secanalysis = ; scripts/mod/modpost $@
+endif
 
 # Compile C sources (.c)
 # ---------------------------------------------------------------------------
@@ -266,7 +272,8 @@ ifdef builtin-target
 quiet_cmd_link_o_target = LD      $@
 # If the list of objects to link is empty, just create an empty built-in.o
 cmd_link_o_target = $(if $(strip $(obj-y)),\
-                      $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^),\
+                      $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
+                      $(cmd_secanalysis),\
                       rm -f $@; $(AR) rcs $@)
 
 $(builtin-target): $(obj-y) FORCE
@@ -276,6 +283,19 @@ targets += $(builtin-target)
 endif # builtin-target
 
 #
+# Rule to create modules.order file
+#
+# Create commands to either record .ko file or cat modules.order from
+# a subdirectory
+modorder-cmds =                                         \
+        $(foreach m, $(modorder),                       \
+                $(if $(filter %/modules.order, $m),     \
+                        cat $m;, echo kernel/$m;))
+
+$(modorder-target): $(subdir-ym) FORCE
+        $(Q)(cat /dev/null; $(modorder-cmds)) > $@
+
+#
 # Rule to compile a set of .o files into one .a file
 #
 ifdef lib-target
@@ -301,7 +321,7 @@ $($(subst $(obj)/,,$(@:.o=-objs)))    \
 $($(subst $(obj)/,,$(@:.o=-y)))), $^)
  
 quiet_cmd_link_multi-y = LD      $@
-cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps)
+cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
 
 quiet_cmd_link_multi-m = LD [M]  $@
 cmd_link_multi-m = $(cmd_link_multi-y)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 3c5e88bfecf1..8e440233c27d 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -25,6 +25,11 @@ lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
 # o if we encounter foo/ in $(obj-m), remove it from $(obj-m) 
 #   and add the directory to the list of dirs to descend into: $(subdir-m)
 
+# Determine modorder.
+# Unfortunately, we don't have information about ordering between -y
+# and -m subdirs.  Just put -y's first.
+modorder        := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
+
 __subdir-y      := $(patsubst %/,%,$(filter %/, $(obj-y)))
 subdir-y        += $(__subdir-y)
 __subdir-m      := $(patsubst %/,%,$(filter %/, $(obj-m)))
@@ -64,6 +69,7 @@ real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)
 extra-y         := $(addprefix $(obj)/,$(extra-y))
 always          := $(addprefix $(obj)/,$(always))
 targets         := $(addprefix $(obj)/,$(targets))
+modorder        := $(addprefix $(obj)/,$(modorder))
 obj-y           := $(addprefix $(obj)/,$(obj-y))
 obj-m           := $(addprefix $(obj)/,$(obj-m))
 lib-y           := $(addprefix $(obj)/,$(lib-y))
diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
index f0ff248f5e6f..efa5d940e632 100644
--- a/scripts/Makefile.modinst
+++ b/scripts/Makefile.modinst
@@ -21,7 +21,7 @@ quiet_cmd_modules_install = INSTALL $@
 
 # Modules built outside the kernel source tree go into extra by default
 INSTALL_MOD_DIR ?= extra
-ext-mod-dir = $(INSTALL_MOD_DIR)$(subst $(KBUILD_EXTMOD),,$(@D))
+ext-mod-dir = $(INSTALL_MOD_DIR)$(subst $(patsubst %/,%,$(KBUILD_EXTMOD)),,$(@D))
 
 modinst_dir = $(if $(KBUILD_EXTMOD),$(ext-mod-dir),kernel/$(@D))
 
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index d988f5d21e3d..65e707e1ffc3 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -62,6 +62,7 @@ modpost = scripts/mod/modpost                    \
  $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile)   \
  $(if $(KBUILD_EXTMOD),-I $(modulesymfile))      \
  $(if $(KBUILD_EXTMOD),-o $(modulesymfile))      \
+ $(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S)      \
  $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)
 
 quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules
diff --git a/scripts/basic/docproc.c b/scripts/basic/docproc.c
index 0e4bd5459df4..35bdc68b6e66 100644
--- a/scripts/basic/docproc.c
+++ b/scripts/basic/docproc.c
@@ -30,6 +30,7 @@
  *              !Ifilename
  *              !Dfilename
  *              !Ffilename
+ *              !Pfilename
  *
  */
 
@@ -57,6 +58,7 @@ FILEONLY *symbolsonly;
 typedef void FILELINE(char * file, char * line);
 FILELINE * singlefunctions;
 FILELINE * entity_system;
+FILELINE * docsection;
 
 #define MAXLINESZ     2048
 #define MAXFILES      250
@@ -65,6 +67,7 @@ FILELINE * entity_system;
 #define DOCBOOK       "-docbook"
 #define FUNCTION      "-function"
 #define NOFUNCTION    "-nofunction"
+#define NODOCSECTIONS "-no-doc-sections"
 
 char *srctree;
 
@@ -231,13 +234,14 @@ void docfunctions(char * filename, char * type)
 
         for (i=0; i <= symfilecnt; i++)
                 symcnt += symfilelist[i].symbolcnt;
-        vec = malloc((2 + 2 * symcnt + 2) * sizeof(char*));
+        vec = malloc((2 + 2 * symcnt + 3) * sizeof(char *));
         if (vec == NULL) {
                 perror("docproc: ");
                 exit(1);
         }
         vec[idx++] = KERNELDOC;
         vec[idx++] = DOCBOOK;
+        vec[idx++] = NODOCSECTIONS;
         for (i=0; i < symfilecnt; i++) {
                 struct symfile * sym = &symfilelist[i];
                 for (j=0; j < sym->symbolcnt; j++) {
@@ -287,12 +291,36 @@ void singfunc(char * filename, char * line)
 }
 
 /*
+ * Insert specific documentation section from a file.
+ * Call kernel-doc with the following parameters:
+ * kernel-doc -docbook -function "doc section" filename
+ */
+void docsect(char *filename, char *line)
+{
+        char *vec[6]; /* kerneldoc -docbook -function "section" file NULL */
+        char *s;
+
+        for (s = line; *s; s++)
+                if (*s == '\n')
+                        *s = '\0';
+
+        vec[0] = KERNELDOC;
+        vec[1] = DOCBOOK;
+        vec[2] = FUNCTION;
+        vec[3] = line;
+        vec[4] = filename;
+        vec[5] = NULL;
+        exec_kernel_doc(vec);
+}
+
+/*
  * Parse file, calling action specific functions for:
  * 1) Lines containing !E
  * 2) Lines containing !I
  * 3) Lines containing !D
  * 4) Lines containing !F
- * 5) Default lines - lines not matching the above
+ * 5) Lines containing !P
+ * 6) Default lines - lines not matching the above
  */
 void parse_file(FILE *infile)
 {
@@ -326,6 +354,15 @@ void parse_file(FILE *infile)
                                                 s++;
                                         singlefunctions(line +2, s);
                                         break;
+                                case 'P':
+                                        /* filename */
+                                        while (*s && !isspace(*s)) s++;
+                                        *s++ = '\0';
+                                        /* DOC: section name */
+                                        while (isspace(*s))
+                                                s++;
+                                        docsection(line + 2, s);
+                                        break;
                                 default:
                                         defaultline(line);
                         }
@@ -372,6 +409,7 @@ int main(int argc, char *argv[])
                 externalfunctions = find_export_symbols;
                 symbolsonly       = find_export_symbols;
                 singlefunctions   = noaction2;
+                docsection        = noaction2;
                 parse_file(infile);
 
                 /* Rewind to start from beginning of file again */
@@ -381,6 +419,7 @@ int main(int argc, char *argv[])
                 externalfunctions = extfunc;
                 symbolsonly       = printline;
                 singlefunctions   = singfunc;
+                docsection        = docsect;
 
                 parse_file(infile);
         }
@@ -394,6 +433,7 @@ int main(int argc, char *argv[])
                 externalfunctions = adddep;
                 symbolsonly       = adddep;
                 singlefunctions   = adddep2;
+                docsection        = adddep2;
                 parse_file(infile);
                 printf("\n");
         }
diff --git a/scripts/decodecode b/scripts/decodecode
index 1e1a8f620c47..235d3938529d 100644
--- a/scripts/decodecode
+++ b/scripts/decodecode
@@ -6,7 +6,19 @@
 # e.g., to decode an i386 oops on an x86_64 system, use:
 # AFLAGS=--32 decodecode < 386.oops
 
-T=`mktemp`
+cleanup() {
+        rm -f $T $T.s $T.o
+        exit 1
+}
+
+die() {
+        echo "$@"
+        exit 1
+}
+
+trap cleanup EXIT
+
+T=`mktemp` || die "cannot create temp file"
 code=
 
 while read i ; do
@@ -20,6 +32,7 @@ esac
 done
 
 if [ -z "$code" ]; then
+        rm $T
         exit
 fi
 
@@ -48,4 +61,4 @@ echo -n "	.byte 0x" > $T.s
 echo $code >> $T.s
 as $AFLAGS -o $T.o $T.s
 objdump -S $T.o
-rm $T.o $T.s
+rm $T $T.s $T.o
diff --git a/scripts/gcc-version.sh b/scripts/gcc-version.sh
index a5121a6d8949..cc767b388baf 100644
--- a/scripts/gcc-version.sh
+++ b/scripts/gcc-version.sh
@@ -9,7 +9,10 @@
 # gcc-2.95.3, `030301' for gcc-3.3.1, etc.
 #
 
-if [[ $1 = "-p" ]] ; then with_patchlevel=1; shift; fi
+if [ "$1" = "-p" ] ; then
+        with_patchlevel=1;
+        shift;
+fi
 
 compiler="$*"
 
diff --git a/scripts/genksyms/genksyms.c b/scripts/genksyms/genksyms.c
index 511023b430a8..dca5e0dd09bf 100644
--- a/scripts/genksyms/genksyms.c
+++ b/scripts/genksyms/genksyms.c
@@ -440,17 +440,21 @@ void error_with_pos(const char *fmt, ...)
 
 static void genksyms_usage(void)
 {
-        fputs("Usage:\n" "genksyms [-dDwqhV] > /path/to/.tmp_obj.ver\n" "\n"
+        fputs("Usage:\n" "genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver\n" "\n"
 #ifdef __GNU_LIBRARY__
+              "  -a, --arch            Select architecture\n"
               "  -d, --debug           Increment the debug level (repeatable)\n"
               "  -D, --dump            Dump expanded symbol defs (for debugging only)\n"
+              "  -T, --dump-types file Dump expanded types into file (for debugging only)\n"
               "  -w, --warnings        Enable warnings\n"
               "  -q, --quiet           Disable warnings (default)\n"
               "  -h, --help            Print this message\n"
               "  -V, --version         Print the release version\n"
 #else                           /* __GNU_LIBRARY__ */
+              "  -a                    Select architecture\n"
               "  -d                    Increment the debug level (repeatable)\n"
               "  -D                    Dump expanded symbol defs (for debugging only)\n"
+              "  -T file               Dump expanded types into file (for debugging only)\n"
               "  -w                    Enable warnings\n"
               "  -q                    Disable warnings (default)\n"
               "  -h                    Print this message\n"
@@ -477,10 +481,10 @@ int main(int argc, char **argv)
                 {0, 0, 0, 0}
         };
 
-        while ((o = getopt_long(argc, argv, "a:dwqVDT:k:p:",
+        while ((o = getopt_long(argc, argv, "a:dwqVDT:h",
                                 &long_opts[0], NULL)) != EOF)
 #else                           /* __GNU_LIBRARY__ */
-        while ((o = getopt(argc, argv, "a:dwqVDT:k:p:")) != EOF)
+        while ((o = getopt(argc, argv, "a:dwqVDT:h")) != EOF)
 #endif                          /* __GNU_LIBRARY__ */
                 switch (o) {
                 case 'a':
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 1ad6f7fc490a..32e8c5a227c3 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -24,22 +24,25 @@ oldconfig: $(obj)/conf
 silentoldconfig: $(obj)/conf
         $< -s $(Kconfig)
 
-# Create new linux.po file
+# Create new linux.pot file
 # Adjust charset to UTF-8 in .po file to accept UTF-8 in Kconfig files
 # The symlink is used to repair a deficiency in arch/um
-update-po-config: $(obj)/kxgettext
-        xgettext --default-domain=linux                  \
+update-po-config: $(obj)/kxgettext $(obj)/gconf.glade.h
+        $(Q)echo "  GEN config"
+        $(Q)xgettext --default-domain=linux              \
             --add-comments --keyword=_ --keyword=N_      \
             --from-code=UTF-8                            \
             --files-from=scripts/kconfig/POTFILES.in     \
             --output $(obj)/config.pot
         $(Q)sed -i s/CHARSET/UTF-8/ $(obj)/config.pot
         $(Q)ln -fs Kconfig.i386 arch/um/Kconfig.arch
-        (for i in `ls arch/`;                            \
-        do                                               \
-            $(obj)/kxgettext arch/$$i/Kconfig;           \
-        done ) >> $(obj)/config.pot
-        msguniq --sort-by-file --to-code=UTF-8 $(obj)/config.pot \
+        $(Q)(for i in `ls arch/`;                        \
+            do                                           \
+                echo "  GEN $$i";                        \
+                $(obj)/kxgettext arch/$$i/Kconfig        \
+                     >> $(obj)/config.pot;               \
+            done )
+        $(Q)msguniq --sort-by-file --to-code=UTF-8 $(obj)/config.pot \
             --output $(obj)/linux.pot
         $(Q)rm -f arch/um/Kconfig.arch
         $(Q)rm -f $(obj)/config.pot
@@ -93,12 +96,6 @@ HOST_LOADLIBES   = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC))
 
 HOST_EXTRACFLAGS += -DLOCALE
 
-PHONY += $(obj)/dochecklxdialog
-$(obj)/dochecklxdialog:
-        $(Q)$(CONFIG_SHELL) $(check-lxdialog) -check $(HOSTCC) $(HOST_LOADLIBES)
-
-always := dochecklxdialog
-
 
 # ===========================================================================
 # Shared Makefile for the various kconfig executables:
@@ -142,8 +139,17 @@ gconf-objs	:= gconf.o kconfig_load.o zconf.tab.o
 endif
 
 clean-files     := lkc_defs.h qconf.moc .tmp_qtcheck \
-                   .tmp_gtkcheck zconf.tab.c lex.zconf.c zconf.hash.c
+                   .tmp_gtkcheck zconf.tab.c lex.zconf.c zconf.hash.c gconf.glade.h
 clean-files     += mconf qconf gconf
+clean-files     += config.pot linux.pot
+
+# Check that we have the required ncurses stuff installed for lxdialog (menuconfig)
+PHONY += $(obj)/dochecklxdialog
+$(addprefix $(obj)/,$(lxdialog)): $(obj)/dochecklxdialog
+$(obj)/dochecklxdialog:
+        $(Q)$(CONFIG_SHELL) $(check-lxdialog) -check $(HOSTCC) $(HOST_EXTRACFLAGS) $(HOST_LOADLIBES)
+
+always := dochecklxdialog
 
 # Add environment specific flags
 HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(srctree)/$(src)/check.sh $(HOSTCC) $(HOSTCFLAGS))
@@ -248,6 +254,9 @@ $(obj)/%.moc: $(src)/%.h
 $(obj)/lkc_defs.h: $(src)/lkc_proto.h
         sed < $< > $@ 's/P(\([^,]*\),.*/#define \1 (\*\1_p)/'
 
+# Extract gconf menu items for I18N support
+$(obj)/gconf.glade.h: $(obj)/gconf.glade
+        intltool-extract --type=gettext/glade $(obj)/gconf.glade
 
 ###
 # The following requires flex/bison/gperf
diff --git a/scripts/kconfig/POTFILES.in b/scripts/kconfig/POTFILES.in
index cc94e46a79e8..967457396990 100644
--- a/scripts/kconfig/POTFILES.in
+++ b/scripts/kconfig/POTFILES.in
@@ -1,5 +1,12 @@
+scripts/kconfig/lxdialog/checklist.c
+scripts/kconfig/lxdialog/inputbox.c
+scripts/kconfig/lxdialog/menubox.c
+scripts/kconfig/lxdialog/textbox.c
+scripts/kconfig/lxdialog/util.c
+scripts/kconfig/lxdialog/yesno.c
 scripts/kconfig/mconf.c
 scripts/kconfig/conf.c
 scripts/kconfig/confdata.c
 scripts/kconfig/gconf.c
+scripts/kconfig/gconf.glade.h
 scripts/kconfig/qconf.cc
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 8d6f17490c5e..fda63136ae68 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -3,12 +3,13 @@
  * Released under the terms of the GNU GPL v2.0.
  */
 
+#include <locale.h>
 #include <ctype.h>
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 #include <time.h>
+#include <unistd.h>
 #include <sys/stat.h>
 
 #define LKC_DIRECT_LINK
@@ -40,7 +41,7 @@ static char nohelp_text[] = N_("Sorry, no help available for this option yet.\n"
 static const char *get_help(struct menu *menu)
 {
         if (menu_has_help(menu))
-                return menu_get_help(menu);
+                return _(menu_get_help(menu));
         else
                 return nohelp_text;
 }
@@ -78,7 +79,7 @@ static int conf_askvalue(struct symbol *sym, const char *def)
         tristate val;
 
         if (!sym_has_value(sym))
-                printf("(NEW) ");
+                printf(_("(NEW) "));
 
         line[0] = '\n';
         line[1] = 0;
@@ -160,7 +161,7 @@ static int conf_askvalue(struct symbol *sym, const char *def)
                 }
         case set_random:
                 do {
-                        val = (tristate)(random() % 3);
+                        val = (tristate)(rand() % 3);
                 } while (!sym_tristate_within_range(sym, val));
                 switch (val) {
                 case no: line[0] = 'n'; break;
@@ -183,7 +184,7 @@ int conf_string(struct menu *menu)
         const char *def;
 
         while (1) {
-                printf("%*s%s ", indent - 1, "", menu->prompt->text);
+                printf("%*s%s ", indent - 1, "", _(menu->prompt->text));
                 printf("(%s) ", sym->name);
                 def = sym_get_string_value(sym);
                 if (sym_get_string_value(sym))
@@ -216,7 +217,7 @@ static int conf_sym(struct menu *menu)
         tristate oldval, newval;
 
         while (1) {
-                printf("%*s%s ", indent - 1, "", menu->prompt->text);
+                printf("%*s%s ", indent - 1, "", _(menu->prompt->text));
                 if (sym->name)
                         printf("(%s) ", sym->name);
                 type = sym_get_type(sym);
@@ -306,7 +307,7 @@ static int conf_choice(struct menu *menu)
                 case no:
                         return 1;
                 case mod:
-                        printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
+                        printf("%*s%s\n", indent - 1, "", _(menu_get_prompt(menu)));
                         return 0;
                 case yes:
                         break;
@@ -316,7 +317,7 @@ static int conf_choice(struct menu *menu)
         while (1) {
                 int cnt, def;
 
-                printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
+                printf("%*s%s\n", indent - 1, "", _(menu_get_prompt(menu)));
                 def_sym = sym_get_choice_value(sym);
                 cnt = def = 0;
                 line[0] = 0;
@@ -324,7 +325,7 @@ static int conf_choice(struct menu *menu)
                         if (!menu_is_visible(child))
                                 continue;
                         if (!child->sym) {
-                                printf("%*c %s\n", indent, '*', menu_get_prompt(child));
+                                printf("%*c %s\n", indent, '*', _(menu_get_prompt(child)));
                                 continue;
                         }
                         cnt++;
@@ -333,14 +334,14 @@ static int conf_choice(struct menu *menu)
                                 printf("%*c", indent, '>');
                         } else
                                 printf("%*c", indent, ' ');
-                        printf(" %d. %s", cnt, menu_get_prompt(child));
+                        printf(" %d. %s", cnt, _(menu_get_prompt(child)));
                         if (child->sym->name)
                                 printf(" (%s)", child->sym->name);
                         if (!sym_has_value(child->sym))
-                                printf(" (NEW)");
+                                printf(_(" (NEW)"));
                         printf("\n");
                 }
-                printf("%*schoice", indent - 1, "");
+                printf(_("%*schoice"), indent - 1, "");
                 if (cnt == 1) {
                         printf("[1]: 1\n");
                         goto conf_childs;
@@ -375,7 +376,7 @@ static int conf_choice(struct menu *menu)
                         break;
                 case set_random:
                         if (is_new)
-                                def = (random() % cnt) + 1;
+                                def = (rand() % cnt) + 1;
                 case set_default:
                 case set_yes:
                 case set_mod:
@@ -399,9 +400,9 @@ static int conf_choice(struct menu *menu)
                         continue;
                 }
                 sym_set_choice_value(sym, child->sym);
-                if (child->list) {
+                for (child = child->list; child; child = child->next) {
                         indent += 2;
-                        conf(child->list);
+                        conf(child);
                         indent -= 2;
                 }
                 return 1;
@@ -433,7 +434,7 @@ static void conf(struct menu *menu)
                         if (prompt)
                                 printf("%*c\n%*c %s\n%*c\n",
                                         indent, '*',
-                                        indent, '*', prompt,
+                                        indent, '*', _(prompt),
                                         indent, '*');
                 default:
                         ;
@@ -495,12 +496,16 @@ static void check_conf(struct menu *menu)
 
 int main(int ac, char **av)
 {
-        int i = 1;
+        int opt;
         const char *name;
         struct stat tmpstat;
 
-        if (ac > i && av[i][0] == '-') {
-                switch (av[i++][1]) {
+        setlocale(LC_ALL, "");
+        bindtextdomain(PACKAGE, LOCALEDIR);
+        textdomain(PACKAGE);
+
+        while ((opt = getopt(ac, av, "osdD:nmyrh")) != -1) {
+                switch (opt) {
                 case 'o':
                         input_mode = ask_new;
                         break;
@@ -513,12 +518,7 @@ int main(int ac, char **av)
                         break;
                 case 'D':
                         input_mode = set_default;
-                        defconfig_file = av[i++];
-                        if (!defconfig_file) {
-                                printf(_("%s: No default config file specified\n"),
-                                        av[0]);
-                                exit(1);
-                        }
+                        defconfig_file = optarg;
                         break;
                 case 'n':
                         input_mode = set_no;
@@ -531,19 +531,22 @@ int main(int ac, char **av)
                         break;
                 case 'r':
                         input_mode = set_random;
-                        srandom(time(NULL));
+                        srand(time(NULL));
                         break;
                 case 'h':
-                case '?':
-                        fprintf(stderr, "See README for usage info\n");
+                        printf(_("See README for usage info\n"));
                         exit(0);
+                        break;
+                default:
+                        fprintf(stderr, _("See README for usage info\n"));
+                        exit(1);
                 }
         }
-        name = av[i];
-        if (!name) {
+        if (ac == optind) {
                 printf(_("%s: Kconfig file missing\n"), av[0]);
                 exit(1);
         }
+        name = av[optind];
         conf_parse(name);
         //zconfdump(stdout);
         switch (input_mode) {
@@ -551,9 +554,9 @@ int main(int ac, char **av)
                 if (!defconfig_file)
                         defconfig_file = conf_get_default_confname();
                 if (conf_read(defconfig_file)) {
-                        printf("***\n"
+                        printf(_("***\n"
                                 "*** Can't find default configuration \"%s\"!\n"
-                                "***\n", defconfig_file);
+                                "***\n"), defconfig_file);
                         exit(1);
                 }
                 break;
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index e0f402f3b75d..ee5fe943d58d 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -232,8 +232,7 @@ load:
                                         sym->type = S_BOOLEAN;
                         }
                         if (sym->flags & def_flags) {
-                                conf_warning("trying to reassign symbol %s", sym->name);
-                                break;
+                                conf_warning("override: reassigning to symbol %s", sym->name);
                         }
                         switch (sym->type) {
                         case S_BOOLEAN:
@@ -272,8 +271,7 @@ load:
                                         sym->type = S_OTHER;
                         }
                         if (sym->flags & def_flags) {
-                                conf_warning("trying to reassign symbol %s", sym->name);
-                                break;
+                                conf_warning("override: reassigning to symbol %s", sym->name);
                         }
                         if (conf_set_sym_val(sym, def, def_flags, p))
                                 continue;
@@ -297,14 +295,12 @@ load:
                                 }
                                 break;
                         case yes:
-                                if (cs->def[def].tri != no) {
-                                        conf_warning("%s creates inconsistent choice state", sym->name);
-                                        cs->flags &= ~def_flags;
-                                } else
-                                        cs->def[def].val = sym;
+                                if (cs->def[def].tri != no)
+                                        conf_warning("override: %s changes choice state", sym->name);
+                                cs->def[def].val = sym;
                                 break;
                         }
-                        cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
+                        cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
                 }
         }
         fclose(in);
@@ -316,7 +312,7 @@ load:
 
 int conf_read(const char *name)
 {
-        struct symbol *sym;
+        struct symbol *sym, *choice_sym;
         struct property *prop;
         struct expr *e;
         int i, flags;
@@ -357,9 +353,9 @@ int conf_read(const char *name)
                  */
                 prop = sym_get_choice_prop(sym);
                 flags = sym->flags;
-                for (e = prop->expr; e; e = e->left.expr)
-                        if (e->right.sym->visible != no)
-                                flags &= e->right.sym->flags;
+                expr_list_for_each_sym(prop->expr, e, choice_sym)
+                        if (choice_sym->visible != no)
+                                flags &= choice_sym->flags;
                 sym->flags &= flags | ~SYMBOL_DEF_USER;
         }
 
diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index 6f98dbfe70cf..579ece4fa584 100644
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -87,7 +87,7 @@ struct expr *expr_copy(struct expr *org)
                 break;
         case E_AND:
         case E_OR:
-        case E_CHOICE:
+        case E_LIST:
                 e->left.expr = expr_copy(org->left.expr);
                 e->right.expr = expr_copy(org->right.expr);
                 break;
@@ -217,7 +217,7 @@ int expr_eq(struct expr *e1, struct expr *e2)
                 expr_free(e2);
                 trans_count = old_count;
                 return res;
-        case E_CHOICE:
+        case E_LIST:
         case E_RANGE:
         case E_NONE:
                 /* panic */;
@@ -648,7 +648,7 @@ struct expr *expr_transform(struct expr *e)
         case E_EQUAL:
         case E_UNEQUAL:
         case E_SYMBOL:
-        case E_CHOICE:
+        case E_LIST:
                 break;
         default:
                 e->left.expr = expr_transform(e->left.expr);
@@ -932,7 +932,7 @@ struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symb
                 break;
         case E_SYMBOL:
                 return expr_alloc_comp(type, e->left.sym, sym);
-        case E_CHOICE:
+        case E_LIST:
         case E_RANGE:
         case E_NONE:
                 /* panic */;
@@ -955,14 +955,14 @@ tristate expr_calc_value(struct expr *e)
         case E_AND:
                 val1 = expr_calc_value(e->left.expr);
                 val2 = expr_calc_value(e->right.expr);
-                return E_AND(val1, val2);
+                return EXPR_AND(val1, val2);
         case E_OR:
                 val1 = expr_calc_value(e->left.expr);
                 val2 = expr_calc_value(e->right.expr);
-                return E_OR(val1, val2);
+                return EXPR_OR(val1, val2);
         case E_NOT:
                 val1 = expr_calc_value(e->left.expr);
-                return E_NOT(val1);
+                return EXPR_NOT(val1);
         case E_EQUAL:
                 sym_calc_value(e->left.sym);
                 sym_calc_value(e->right.sym);
@@ -1000,9 +1000,9 @@ int expr_compare_type(enum expr_type t1, enum expr_type t2)
                 if (t2 == E_OR)
                         return 1;
         case E_OR:
-                if (t2 == E_CHOICE)
+                if (t2 == E_LIST)
                         return 1;
-        case E_CHOICE:
+        case E_LIST:
                 if (t2 == 0)
                         return 1;
         default:
@@ -1034,12 +1034,18 @@ void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *
                 expr_print(e->left.expr, fn, data, E_NOT);
                 break;
         case E_EQUAL:
-                fn(data, e->left.sym, e->left.sym->name);
+                if (e->left.sym->name)
+                        fn(data, e->left.sym, e->left.sym->name);
+                else
+                        fn(data, NULL, "<choice>");
                 fn(data, NULL, "=");
                 fn(data, e->right.sym, e->right.sym->name);
                 break;
         case E_UNEQUAL:
-                fn(data, e->left.sym, e->left.sym->name);
+                if (e->left.sym->name)
+                        fn(data, e->left.sym, e->left.sym->name);
+                else
+                        fn(data, NULL, "<choice>");
                 fn(data, NULL, "!=");
                 fn(data, e->right.sym, e->right.sym->name);
                 break;
@@ -1053,11 +1059,11 @@ void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *
                 fn(data, NULL, " && ");
                 expr_print(e->right.expr, fn, data, E_AND);
                 break;
-        case E_CHOICE:
+        case E_LIST:
                 fn(data, e->right.sym, e->right.sym->name);
                 if (e->left.expr) {
                         fn(data, NULL, " ^ ");
-                        expr_print(e->left.expr, fn, data, E_CHOICE);
+                        expr_print(e->left.expr, fn, data, E_LIST);
                 }
                 break;
         case E_RANGE:
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index a195986eec6f..9d4cba1c001d 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -25,14 +25,13 @@ struct file {
 
 #define FILE_BUSY               0x0001
 #define FILE_SCANNED            0x0002
-#define FILE_PRINTED            0x0004
 
 typedef enum tristate {
         no, mod, yes
 } tristate;
 
 enum expr_type {
-        E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
+        E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
 };
 
 union expr_data {
@@ -45,9 +44,12 @@ struct expr {
         union expr_data left, right;
 };
 
-#define E_OR(dep1, dep2)        (((dep1)>(dep2))?(dep1):(dep2))
-#define E_AND(dep1, dep2)       (((dep1)<(dep2))?(dep1):(dep2))
-#define E_NOT(dep)              (2-(dep))
+#define EXPR_OR(dep1, dep2)     (((dep1)>(dep2))?(dep1):(dep2))
+#define EXPR_AND(dep1, dep2)    (((dep1)<(dep2))?(dep1):(dep2))
+#define EXPR_NOT(dep)           (2-(dep))
+
+#define expr_list_for_each_sym(l, e, s) \
+        for (e = (l); e && (s = e->right.sym); e = e->left.expr)
 
 struct expr_value {
         struct expr *expr;
@@ -86,7 +88,6 @@ struct symbol {
 #define SYMBOL_CHECK            0x0008
 #define SYMBOL_CHOICE           0x0010
 #define SYMBOL_CHOICEVAL        0x0020
-#define SYMBOL_PRINTED          0x0040
 #define SYMBOL_VALID            0x0080
 #define SYMBOL_OPTIONAL         0x0100
 #define SYMBOL_WRITE            0x0200
@@ -105,7 +106,8 @@ struct symbol {
 #define SYMBOL_HASHMASK         0xff
 
 enum prop_type {
-        P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
+        P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE,
+        P_SELECT, P_RANGE, P_ENV
 };
 
 struct property {
diff --git a/scripts/kconfig/gconf.c b/scripts/kconfig/gconf.c
index 262908cfc2ac..199b22bb49e2 100644
--- a/scripts/kconfig/gconf.c
+++ b/scripts/kconfig/gconf.c
@@ -119,8 +119,6 @@ const char *dbg_print_flags(int val)
                 strcat(buf, "choice/");
         if (val & SYMBOL_CHOICEVAL)
                 strcat(buf, "choiceval/");
-        if (val & SYMBOL_PRINTED)
-                strcat(buf, "printed/");
         if (val & SYMBOL_VALID)
                 strcat(buf, "valid/");
         if (val & SYMBOL_OPTIONAL)
@@ -457,14 +455,18 @@ static void text_insert_help(struct menu *menu)
 {
         GtkTextBuffer *buffer;
         GtkTextIter start, end;
-        const char *prompt = menu_get_prompt(menu);
+        const char *prompt = _(menu_get_prompt(menu));
         gchar *name;
         const char *help;
 
-        help = _(menu_get_help(menu));
+        help = menu_get_help(menu);
+
+        /* Gettextize if the help text not empty */
+        if ((help != 0) && (help[0] != 0))
+                help = _(help);
 
         if (menu->sym && menu->sym->name)
-                name = g_strdup_printf(_(menu->sym->name));
+                name = g_strdup_printf(menu->sym->name);
         else
                 name = g_strdup("");
 
@@ -1171,7 +1173,7 @@ static gchar **fill_row(struct menu *menu)
         bzero(row, sizeof(row));
 
         row[COL_OPTION] =
-            g_strdup_printf("%s %s", menu_get_prompt(menu),
+            g_strdup_printf("%s %s", _(menu_get_prompt(menu)),
                             sym && sym_has_value(sym) ? "(NEW)" : "");
 
         if (show_all && !menu_is_visible(menu))
@@ -1221,7 +1223,7 @@ static gchar **fill_row(struct menu *menu)
 
                 if (def_menu)
                         row[COL_VALUE] =
-                            g_strdup(menu_get_prompt(def_menu));
+                            g_strdup(_(menu_get_prompt(def_menu)));
         }
         if (sym->flags & SYMBOL_CHOICEVAL)
                 row[COL_BTNRAD] = GINT_TO_POINTER(TRUE);
diff --git a/scripts/kconfig/lex.zconf.c_shipped b/scripts/kconfig/lex.zconf.c_shipped
index a065d5a57c01..bed0f4e2d2f7 100644
--- a/scripts/kconfig/lex.zconf.c_shipped
+++ b/scripts/kconfig/lex.zconf.c_shipped
@@ -1275,6 +1275,11 @@ YY_RULE_SETUP
 case 32:
 YY_RULE_SETUP
 {
+                while (zconfleng) {
+                        if ((zconftext[zconfleng-1] != ' ') && (zconftext[zconfleng-1] != '\t'))
+                                break;
+                        zconfleng--;
+                }
                 append_string(zconftext, zconfleng);
                 if (!first_ts)
                         first_ts = last_ts;
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 8a07ee4f6bd4..4bc68f20a73c 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -44,6 +44,7 @@ extern "C" {
 
 #define T_OPT_MODULES           1
 #define T_OPT_DEFCONFIG_LIST    2
+#define T_OPT_ENV               3
 
 struct kconf_id {
         int name;
@@ -74,6 +75,7 @@ void kconfig_load(void);
 
 /* menu.c */
 void menu_init(void);
+void menu_warn(struct menu *menu, const char *fmt, ...);
 struct menu *menu_add_menu(void);
 void menu_end_menu(void);
 void menu_add_entry(struct symbol *sym);
@@ -103,6 +105,8 @@ void str_printf(struct gstr *gs, const char *fmt, ...);
 const char *str_get(struct gstr *gs);
 
 /* symbol.c */
+extern struct expr *sym_env_list;
+
 void sym_init(void);
 void sym_clear_all_valid(void);
 void sym_set_all_changed(void);
@@ -110,6 +114,7 @@ void sym_set_changed(struct symbol *sym);
 struct symbol *sym_check_deps(struct symbol *sym);
 struct property *prop_alloc(enum prop_type type, struct symbol *sym);
 struct symbol *prop_get_symbol(struct property *prop);
+struct property *sym_get_env_prop(struct symbol *sym);
 
 static inline tristate sym_get_tristate_value(struct symbol *sym)
 {
diff --git a/scripts/kconfig/lxdialog/check-lxdialog.sh b/scripts/kconfig/lxdialog/check-lxdialog.sh
index 9681476b96e7..62e1e02126e6 100644
--- a/scripts/kconfig/lxdialog/check-lxdialog.sh
+++ b/scripts/kconfig/lxdialog/check-lxdialog.sh
@@ -36,14 +36,16 @@ trap "rm -f $tmp" 0 1 2 3 15
 
 # Check if we can link to ncurses
 check() {
-        echo "main() {}" | $cc -xc - -o $tmp 2> /dev/null
+        echo -e " #include CURSES_LOC \n main() {}" |
+            $cc -xc - -o $tmp 2> /dev/null
         if [ $? != 0 ]; then
-                echo " *** Unable to find the ncurses libraries."          1>&2
-                echo " *** make menuconfig require the ncurses libraries"  1>&2
-                echo " *** "                                               1>&2
-                echo " *** Install ncurses (ncurses-devel) and try again"  1>&2
-                echo " *** "                                               1>&2
-                exit 1
+            echo " *** Unable to find the ncurses libraries or the"       1>&2
+            echo " *** required header files."                            1>&2
+            echo " *** 'make menuconfig' requires the ncurses libraries." 1>&2
+            echo " *** "                                                  1>&2
+            echo " *** Install ncurses (ncurses-devel) and try again."    1>&2
+            echo " *** "                                                  1>&2
+            exit 1
         fi
 }
 
diff --git a/scripts/kconfig/lxdialog/checklist.c b/scripts/kconfig/lxdialog/checklist.c
index cf697080dddd..b2a878c936d6 100644
--- a/scripts/kconfig/lxdialog/checklist.c
+++ b/scripts/kconfig/lxdialog/checklist.c
@@ -97,8 +97,8 @@ static void print_buttons(WINDOW * dialog, int height, int width, int selected)
         int x = width / 2 - 11;
         int y = height - 2;
 
-        print_button(dialog, "Select", y, x, selected == 0);
-        print_button(dialog, " Help ", y, x + 14, selected == 1);
+        print_button(dialog, gettext("Select"), y, x, selected == 0);
+        print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
 
         wmove(dialog, y, x + 1 + 14 * selected);
         wrefresh(dialog);
diff --git a/scripts/kconfig/lxdialog/dialog.h b/scripts/kconfig/lxdialog/dialog.h
index 7e17eba75ae8..b5211fce0d94 100644
--- a/scripts/kconfig/lxdialog/dialog.h
+++ b/scripts/kconfig/lxdialog/dialog.h
@@ -26,6 +26,12 @@
 #include <string.h>
 #include <stdbool.h>
 
+#ifndef KBUILD_NO_NLS
+# include <libintl.h>
+#else
+# define gettext(Msgid) ((const char *) (Msgid))
+#endif
+
 #ifdef __sun__
 #define CURS_MACROS
 #endif
@@ -187,10 +193,9 @@ int item_is_tag(char tag);
 int on_key_esc(WINDOW *win);
 int on_key_resize(void);
 
-void init_dialog(const char *backtitle);
+int init_dialog(const char *backtitle);
 void set_dialog_backtitle(const char *backtitle);
-void reset_dialog(void);
-void end_dialog(void);
+void end_dialog(int x, int y);
 void attr_clear(WINDOW * win, int height, int width, chtype attr);
 void dialog_clear(void);
 void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x);
diff --git a/scripts/kconfig/lxdialog/inputbox.c b/scripts/kconfig/lxdialog/inputbox.c
index 05e72066b359..4946bd02b46d 100644
--- a/scripts/kconfig/lxdialog/inputbox.c
+++ b/scripts/kconfig/lxdialog/inputbox.c
@@ -31,8 +31,8 @@ static void print_buttons(WINDOW * dialog, int height, int width, int selected)
         int x = width / 2 - 11;
         int y = height - 2;
 
-        print_button(dialog, "  Ok  ", y, x, selected == 0);
-        print_button(dialog, " Help ", y, x + 14, selected == 1);
+        print_button(dialog, gettext("  Ok  "), y, x, selected == 0);
+        print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
 
         wmove(dialog, y, x + 1 + 14 * selected);
         wrefresh(dialog);
diff --git a/scripts/kconfig/lxdialog/menubox.c b/scripts/kconfig/lxdialog/menubox.c
index 0d83159d9012..fa9d633f293c 100644
--- a/scripts/kconfig/lxdialog/menubox.c
+++ b/scripts/kconfig/lxdialog/menubox.c
@@ -157,9 +157,9 @@ static void print_buttons(WINDOW * win, int height, int width, int selected)
         int x = width / 2 - 16;
         int y = height - 2;
 
-        print_button(win, "Select", y, x, selected == 0);
-        print_button(win, " Exit ", y, x + 12, selected == 1);
-        print_button(win, " Help ", y, x + 24, selected == 2);
+        print_button(win, gettext("Select"), y, x, selected == 0);
+        print_button(win, gettext(" Exit "), y, x + 12, selected == 1);
+        print_button(win, gettext(" Help "), y, x + 24, selected == 2);
 
         wmove(win, y, x + 1 + 12 * selected);
         wrefresh(win);
diff --git a/scripts/kconfig/lxdialog/textbox.c b/scripts/kconfig/lxdialog/textbox.c
index fabfc1ad789d..c704712d0227 100644
--- a/scripts/kconfig/lxdialog/textbox.c
+++ b/scripts/kconfig/lxdialog/textbox.c
@@ -114,7 +114,7 @@ do_resize:
 
         print_title(dialog, title, width);
 
-        print_button(dialog, " Exit ", height - 2, width / 2 - 4, TRUE);
+        print_button(dialog, gettext(" Exit "), height - 2, width / 2 - 4, TRUE);
         wnoutrefresh(dialog);
         getyx(dialog, cur_y, cur_x);    /* Save cursor position */
 
diff --git a/scripts/kconfig/lxdialog/util.c b/scripts/kconfig/lxdialog/util.c
index a1bddefe73d0..86d95cca46a7 100644
--- a/scripts/kconfig/lxdialog/util.c
+++ b/scripts/kconfig/lxdialog/util.c
@@ -266,31 +266,41 @@ void dialog_clear(void)
 /*
  * Do some initialization for dialog
  */
-void init_dialog(const char *backtitle)
+int init_dialog(const char *backtitle)
 {
-        dlg.backtitle = backtitle;
-        color_setup(getenv("MENUCONFIG_COLOR"));
-}
+        int height, width;
+
+        initscr();              /* Init curses */
+        getmaxyx(stdscr, height, width);
+        if (height < 19 || width < 80) {
+                endwin();
+                return -ERRDISPLAYTOOSMALL;
+        }
 
-void set_dialog_backtitle(const char *backtitle)
-{
         dlg.backtitle = backtitle;
-}
+        color_setup(getenv("MENUCONFIG_COLOR"));
 
-void reset_dialog(void)
-{
-        initscr();              /* Init curses */
         keypad(stdscr, TRUE);
         cbreak();
         noecho();
         dialog_clear();
+
+        return 0;
+}
+
+void set_dialog_backtitle(const char *backtitle)
+{
+        dlg.backtitle = backtitle;
 }
 
 /*
  * End using dialog functions.
  */
-void end_dialog(void)
+void end_dialog(int x, int y)
 {
+        /* move cursor back to original position */
+        move(y, x);
+        refresh();
         endwin();
 }
 
diff --git a/scripts/kconfig/lxdialog/yesno.c b/scripts/kconfig/lxdialog/yesno.c
index ee0a04e3e012..4e6e8090c20b 100644
--- a/scripts/kconfig/lxdialog/yesno.c
+++ b/scripts/kconfig/lxdialog/yesno.c
@@ -29,8 +29,8 @@ static void print_buttons(WINDOW * dialog, int height, int width, int selected)
         int x = width / 2 - 10;
         int y = height - 2;
 
-        print_button(dialog, " Yes ", y, x, selected == 0);
-        print_button(dialog, "  No  ", y, x + 13, selected == 1);
+        print_button(dialog, gettext(" Yes "), y, x, selected == 0);
+        print_button(dialog, gettext("  No  "), y, x + 13, selected == 1);
 
         wmove(dialog, y, x + 1 + 13 * selected);
         wrefresh(dialog);
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index 47e226fdedd7..50e61c411bc0 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -8,17 +8,13 @@
  * i18n, 2005, Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  */
 
-#include <sys/ioctl.h>
-#include <sys/wait.h>
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
-#include <signal.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
-#include <termios.h>
 #include <unistd.h>
 #include <locale.h>
 
@@ -275,8 +271,6 @@ search_help[] = N_(
         "\n");
 
 static int indent;
-static struct termios ios_org;
-static int rows = 0, cols = 0;
 static struct menu *current_menu;
 static int child_count;
 static int single_menu_mode;
@@ -290,51 +284,16 @@ static void show_textbox(const char *title, const char *text, int r, int c);
 static void show_helptext(const char *title, const char *text);
 static void show_help(struct menu *menu);
 
-static void init_wsize(void)
-{
-        struct winsize ws;
-        char *env;
-
-        if (!ioctl(STDIN_FILENO, TIOCGWINSZ, &ws)) {
-                rows = ws.ws_row;
-                cols = ws.ws_col;
-        }
-
-        if (!rows) {
-                env = getenv("LINES");
-                if (env)
-                        rows = atoi(env);
-                if (!rows)
-                        rows = 24;
-        }
-        if (!cols) {
-                env = getenv("COLUMNS");
-                if (env)
-                        cols = atoi(env);
-                if (!cols)
-                        cols = 80;
-        }
-
-        if (rows < 19 || cols < 80) {
-                fprintf(stderr, N_("Your display is too small to run Menuconfig!\n"));
-                fprintf(stderr, N_("It must be at least 19 lines by 80 columns.\n"));
-                exit(1);
-        }
-
-        rows -= 4;
-        cols -= 5;
-}
-
 static void get_prompt_str(struct gstr *r, struct property *prop)
 {
         int i, j;
         struct menu *submenu[8], *menu;
 
-        str_printf(r, "Prompt: %s\n", prop->text);
-        str_printf(r, "  Defined at %s:%d\n", prop->menu->file->name,
+        str_printf(r, _("Prompt: %s\n"), _(prop->text));
+        str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
                 prop->menu->lineno);
         if (!expr_is_yes(prop->visible.expr)) {
-                str_append(r, "  Depends on: ");
+                str_append(r, _("  Depends on: "));
                 expr_gstr_print(prop->visible.expr, r);
                 str_append(r, "\n");
         }
@@ -342,13 +301,13 @@ static void get_prompt_str(struct gstr *r, struct property *prop)
         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
                 submenu[i++] = menu;
         if (i > 0) {
-                str_printf(r, "  Location:\n");
+                str_printf(r, _("  Location:\n"));
                 for (j = 4; --i >= 0; j += 2) {
                         menu = submenu[i];
-                        str_printf(r, "%*c-> %s", j, ' ', menu_get_prompt(menu));
+                        str_printf(r, "%*c-> %s", j, ' ', _(menu_get_prompt(menu)));
                         if (menu->sym) {
                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
-                                        menu->sym->name : "<choice>",
+                                        menu->sym->name : _("<choice>"),
                                         sym_get_string_value(menu->sym));
                         }
                         str_append(r, "\n");
@@ -378,7 +337,7 @@ static void get_symbol_str(struct gstr *r, struct symbol *sym)
         if (hit)
                 str_append(r, "\n");
         if (sym->rev_dep.expr) {
-                str_append(r, "  Selected by: ");
+                str_append(r, _("  Selected by: "));
                 expr_gstr_print(sym->rev_dep.expr, r);
                 str_append(r, "\n");
         }
@@ -394,7 +353,7 @@ static struct gstr get_relations_str(struct symbol **sym_arr)
         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
                 get_symbol_str(&res, sym);
         if (!i)
-                str_append(&res, "No matches found.\n");
+                str_append(&res, _("No matches found.\n"));
         return res;
 }
 
@@ -474,6 +433,7 @@ static void build_conf(struct menu *menu)
                         switch (prop->type) {
                         case P_MENU:
                                 child_count++;
+                                prompt = _(prompt);
                                 if (single_menu_mode) {
                                         item_make("%s%*c%s",
                                                   menu->data ? "-->" : "++>",
@@ -489,7 +449,7 @@ static void build_conf(struct menu *menu)
                         case P_COMMENT:
                                 if (prompt) {
                                         child_count++;
-                                        item_make("   %*c*** %s ***", indent + 1, ' ', prompt);
+                                        item_make("   %*c*** %s ***", indent + 1, ' ', _(prompt));
                                         item_set_tag(':');
                                         item_set_data(menu);
                                 }
@@ -497,7 +457,7 @@ static void build_conf(struct menu *menu)
                         default:
                                 if (prompt) {
                                         child_count++;
-                                        item_make("---%*c%s", indent + 1, ' ', prompt);
+                                        item_make("---%*c%s", indent + 1, ' ', _(prompt));
                                         item_set_tag(':');
                                         item_set_data(menu);
                                 }
@@ -541,10 +501,10 @@ static void build_conf(struct menu *menu)
                         item_set_data(menu);
                 }
 
-                item_add_str("%*c%s", indent + 1, ' ', menu_get_prompt(menu));
+                item_add_str("%*c%s", indent + 1, ' ', _(menu_get_prompt(menu)));
                 if (val == yes) {
                         if (def_menu) {
-                                item_add_str(" (%s)", menu_get_prompt(def_menu));
+                                item_add_str(" (%s)", _(menu_get_prompt(def_menu)));
                                 item_add_str("  --->");
                                 if (def_menu->list) {
                                         indent += 2;
@@ -556,7 +516,7 @@ static void build_conf(struct menu *menu)
                 }
         } else {
                 if (menu == current_menu) {
-                        item_make("---%*c%s", indent + 1, ' ', menu_get_prompt(menu));
+                        item_make("---%*c%s", indent + 1, ' ', _(menu_get_prompt(menu)));
                         item_set_tag(':');
                         item_set_data(menu);
                         goto conf_childs;
@@ -599,17 +559,17 @@ static void build_conf(struct menu *menu)
                                 tmp = indent - tmp + 4;
                                 if (tmp < 0)
                                         tmp = 0;
-                                item_add_str("%*c%s%s", tmp, ' ', menu_get_prompt(menu),
+                                item_add_str("%*c%s%s", tmp, ' ', _(menu_get_prompt(menu)),
                                              (sym_has_value(sym) || !sym_is_changable(sym)) ?
-                                             "" : " (NEW)");
+                                             "" : _(" (NEW)"));
                                 item_set_tag('s');
                                 item_set_data(menu);
                                 goto conf_childs;
                         }
                 }
-                item_add_str("%*c%s%s", indent + 1, ' ', menu_get_prompt(menu),
+                item_add_str("%*c%s%s", indent + 1, ' ', _(menu_get_prompt(menu)),
                           (sym_has_value(sym) || !sym_is_changable(sym)) ?
-                          "" : " (NEW)");
+                          "" : _(" (NEW)"));
                 if (menu->prompt->type == P_MENU) {
                         item_add_str("  --->");
                         return;
@@ -647,7 +607,7 @@ static void conf(struct menu *menu)
                         item_set_tag('S');
                 }
                 dialog_clear();
-                res = dialog_menu(prompt ? prompt : _("Main Menu"),
+                res = dialog_menu(prompt ? _(prompt) : _("Main Menu"),
                                   _(menu_instructions),
                                   active_menu, &s_scroll);
                 if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
@@ -694,7 +654,7 @@ static void conf(struct menu *menu)
                         if (sym)
                                 show_help(submenu);
                         else
-                                show_helptext("README", _(mconf_readme));
+                                show_helptext(_("README"), _(mconf_readme));
                         break;
                 case 3:
                         if (item_is_tag('t')) {
@@ -752,13 +712,13 @@ static void show_help(struct menu *menu)
                 str_append(&help, nohelp_text);
         }
         get_symbol_str(&help, sym);
-        show_helptext(menu_get_prompt(menu), str_get(&help));
+        show_helptext(_(menu_get_prompt(menu)), str_get(&help));
         str_free(&help);
 }
 
 static void conf_choice(struct menu *menu)
 {
-        const char *prompt = menu_get_prompt(menu);
+        const char *prompt = _(menu_get_prompt(menu));
         struct menu *child;
         struct symbol *active;
 
@@ -772,7 +732,7 @@ static void conf_choice(struct menu *menu)
                 for (child = menu->list; child; child = child->next) {
                         if (!menu_is_visible(child))
                                 continue;
-                        item_make("%s", menu_get_prompt(child));
+                        item_make("%s", _(menu_get_prompt(child)));
                         item_set_data(child);
                         if (child->sym == active)
                                 item_set_selected(1);
@@ -780,7 +740,7 @@ static void conf_choice(struct menu *menu)
                                 item_set_tag('X');
                 }
                 dialog_clear();
-                res = dialog_checklist(prompt ? prompt : _("Main Menu"),
+                res = dialog_checklist(prompt ? _(prompt) : _("Main Menu"),
                                         _(radiolist_instructions),
                                          15, 70, 6);
                 selected = item_activate_selected();
@@ -826,10 +786,10 @@ static void conf_string(struct menu *menu)
                         heading = _(inputbox_instructions_string);
                         break;
                 default:
-                        heading = "Internal mconf error!";
+                        heading = _("Internal mconf error!");
                 }
                 dialog_clear();
-                res = dialog_inputbox(prompt ? prompt : _("Main Menu"),
+                res = dialog_inputbox(prompt ? _(prompt) : _("Main Menu"),
                                       heading, 10, 75,
                                       sym_get_string_value(menu->sym));
                 switch (res) {
@@ -900,13 +860,9 @@ static void conf_save(void)
         }
 }
 
-static void conf_cleanup(void)
-{
-        tcsetattr(1, TCSAFLUSH, &ios_org);
-}
-
 int main(int ac, char **av)
 {
+        int saved_x, saved_y;
         char *mode;
         int res;
 
@@ -923,11 +879,13 @@ int main(int ac, char **av)
                         single_menu_mode = 1;
         }
 
-        tcgetattr(1, &ios_org);
-        atexit(conf_cleanup);
-        init_wsize();
-        reset_dialog();
-        init_dialog(NULL);
+        getyx(stdscr, saved_y, saved_x);
+        if (init_dialog(NULL)) {
+                fprintf(stderr, N_("Your display is too small to run Menuconfig!\n"));
+                fprintf(stderr, N_("It must be at least 19 lines by 80 columns.\n"));
+                return 1;
+        }
+
         set_config_filename(conf_get_configname());
         do {
                 conf(&rootmenu);
@@ -941,7 +899,7 @@ int main(int ac, char **av)
                 else
                         res = -1;
         } while (res == KEY_ESC);
-        end_dialog();
+        end_dialog(saved_x, saved_y);
 
         switch (res) {
         case 0:
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index f9d0d91a3fe4..fdad17367f61 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -15,7 +15,7 @@ static struct menu **last_entry_ptr;
 struct file *file_list;
 struct file *current_file;
 
-static void menu_warn(struct menu *menu, const char *fmt, ...)
+void menu_warn(struct menu *menu, const char *fmt, ...)
 {
         va_list ap;
         va_start(ap, fmt);
@@ -172,6 +172,9 @@ void menu_add_option(int token, char *arg)
                 else if (sym_defconfig_list != current_entry->sym)
                         zconf_error("trying to redefine defconfig symbol");
                 break;
+        case T_OPT_ENV:
+                prop_add_env(arg);
+                break;
         }
 }
 
@@ -239,9 +242,11 @@ void menu_finalize(struct menu *parent)
                         for (menu = parent->list; menu; menu = menu->next) {
                                 if (menu->sym) {
                                         current_entry = parent;
-                                        menu_set_type(menu->sym->type);
+                                        if (sym->type == S_UNKNOWN)
+                                                menu_set_type(menu->sym->type);
                                         current_entry = menu;
-                                        menu_set_type(sym->type);
+                                        if (menu->sym->type == S_UNKNOWN)
+                                                menu_set_type(sym->type);
                                         break;
                                 }
                         }
@@ -326,12 +331,42 @@ void menu_finalize(struct menu *parent)
                                             "values not supported");
                         }
                         current_entry = menu;
-                        menu_set_type(sym->type);
+                        if (menu->sym->type == S_UNKNOWN)
+                                menu_set_type(sym->type);
+                        /* Non-tristate choice values of tristate choices must
+                         * depend on the choice being set to Y. The choice
+                         * values' dependencies were propagated to their
+                         * properties above, so the change here must be re-
+                         * propagated. */
+                        if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
+                                basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
+                                basedep = expr_alloc_and(basedep, menu->dep);
+                                basedep = expr_eliminate_dups(basedep);
+                                menu->dep = basedep;
+                                for (prop = menu->sym->prop; prop; prop = prop->next) {
+                                        if (prop->menu != menu)
+                                                continue;
+                                        dep = expr_alloc_and(expr_copy(basedep),
+                                                             prop->visible.expr);
+                                        dep = expr_eliminate_dups(dep);
+                                        dep = expr_trans_bool(dep);
+                                        prop->visible.expr = dep;
+                                        if (prop->type == P_SELECT) {
+                                                struct symbol *es = prop_get_symbol(prop);
+                                                dep2 = expr_alloc_symbol(menu->sym);
+                                                dep = expr_alloc_and(dep2,
+                                                                     expr_copy(dep));
+                                                dep = expr_alloc_or(es->rev_dep.expr, dep);
+                                                dep = expr_eliminate_dups(dep);
+                                                es->rev_dep.expr = dep;
+                                        }
+                                }
+                        }
                         menu_add_symbol(P_CHOICE, sym, NULL);
                         prop = sym_get_choice_prop(sym);
                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
                                 ;
-                        *ep = expr_alloc_one(E_CHOICE, NULL);
+                        *ep = expr_alloc_one(E_LIST, NULL);
                         (*ep)->right.sym = menu->sym;
                 }
                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
@@ -394,9 +429,9 @@ bool menu_is_visible(struct menu *menu)
 const char *menu_get_prompt(struct menu *menu)
 {
         if (menu->prompt)
-                return _(menu->prompt->text);
+                return menu->prompt->text;
         else if (menu->sym)
-                return _(menu->sym->name);
+                return menu->sym->name;
         return NULL;
 }
 
diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index b9bb32dfd628..5d0fd38b089b 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -114,7 +114,7 @@ void ConfigItem::updateMenu(void)
 
         sym = menu->sym;
         prop = menu->prompt;
-        prompt = QString::fromLocal8Bit(menu_get_prompt(menu));
+        prompt = _(menu_get_prompt(menu));
 
         if (prop) switch (prop->type) {
         case P_MENU:
@@ -208,7 +208,7 @@ void ConfigItem::updateMenu(void)
                 break;
         }
         if (!sym_has_value(sym) && visible)
-                prompt += " (NEW)";
+                prompt += _(" (NEW)");
 set_prompt:
         setText(promptColIdx, prompt);
 }
@@ -346,7 +346,7 @@ ConfigList::ConfigList(ConfigView* p, const char *name)
 
         for (i = 0; i < colNr; i++)
                 colMap[i] = colRevMap[i] = -1;
-        addColumn(promptColIdx, "Option");
+        addColumn(promptColIdx, _("Option"));
 
         reinit();
 }
@@ -360,14 +360,14 @@ void ConfigList::reinit(void)
         removeColumn(nameColIdx);
 
         if (showName)
-                addColumn(nameColIdx, "Name");
+                addColumn(nameColIdx, _("Name"));
         if (showRange) {
                 addColumn(noColIdx, "N");
                 addColumn(modColIdx, "M");
                 addColumn(yesColIdx, "Y");
         }
         if (showData)
-                addColumn(dataColIdx, "Value");
+                addColumn(dataColIdx, _("Value"));
 
         updateListAll();
 }
@@ -803,7 +803,7 @@ void ConfigList::contextMenuEvent(QContextMenuEvent *e)
                         QAction *action;
 
                         headerPopup = new QPopupMenu(this);
-                        action = new QAction(NULL, "Show Name", 0, this);
+                        action = new QAction(NULL, _("Show Name"), 0, this);
                           action->setToggleAction(TRUE);
                           connect(action, SIGNAL(toggled(bool)),
                                   parent(), SLOT(setShowName(bool)));
@@ -811,7 +811,7 @@ void ConfigList::contextMenuEvent(QContextMenuEvent *e)
                                   action, SLOT(setOn(bool)));
                           action->setOn(showName);
                           action->addTo(headerPopup);
-                        action = new QAction(NULL, "Show Range", 0, this);
+                        action = new QAction(NULL, _("Show Range"), 0, this);
                           action->setToggleAction(TRUE);
                           connect(action, SIGNAL(toggled(bool)),
                                   parent(), SLOT(setShowRange(bool)));
@@ -819,7 +819,7 @@ void ConfigList::contextMenuEvent(QContextMenuEvent *e)
                                   action, SLOT(setOn(bool)));
                           action->setOn(showRange);
                           action->addTo(headerPopup);
-                        action = new QAction(NULL, "Show Data", 0, this);
+                        action = new QAction(NULL, _("Show Data"), 0, this);
                           action->setToggleAction(TRUE);
                           connect(action, SIGNAL(toggled(bool)),
                                   parent(), SLOT(setShowData(bool)));
@@ -1041,7 +1041,12 @@ void ConfigInfoView::menuInfo(void)
                 if (showDebug())
                         debug = debug_info(sym);
 
-                help = print_filter(_(menu_get_help(menu)));
+                help = menu_get_help(menu);
+                /* Gettextize if the help text not empty */
+                if (help.isEmpty())
+                        help = print_filter(menu_get_help(menu));
+                else
+                        help = print_filter(_(menu_get_help(menu)));
         } else if (menu->prompt) {
                 head += "<big><b>";
                 head += print_filter(_(menu->prompt->text));
@@ -1083,7 +1088,11 @@ QString ConfigInfoView::debug_info(struct symbol *sym)
                         debug += "</a><br>";
                         break;
                 case P_DEFAULT:
-                        debug += "default: ";
+                case P_SELECT:
+                case P_RANGE:
+                case P_ENV:
+                        debug += prop_get_type_name(prop->type);
+                        debug += ": ";
                         expr_print(prop->expr, expr_print_help, &debug, E_NONE);
                         debug += "<br>";
                         break;
@@ -1094,16 +1103,6 @@ QString ConfigInfoView::debug_info(struct symbol *sym)
                                 debug += "<br>";
                         }
                         break;
-                case P_SELECT:
-                        debug += "select: ";
-                        expr_print(prop->expr, expr_print_help, &debug, E_NONE);
-                        debug += "<br>";
-                        break;
-                case P_RANGE:
-                        debug += "range: ";
-                        expr_print(prop->expr, expr_print_help, &debug, E_NONE);
-                        debug += "<br>";
-                        break;
                 default:
                         debug += "unknown property: ";
                         debug += prop_get_type_name(prop->type);
@@ -1167,7 +1166,7 @@ void ConfigInfoView::expr_print_help(void *data, struct symbol *sym, const char
 QPopupMenu* ConfigInfoView::createPopupMenu(const QPoint& pos)
 {
         QPopupMenu* popup = Parent::createPopupMenu(pos);
-        QAction* action = new QAction(NULL,"Show Debug Info", 0, popup);
+        QAction* action = new QAction(NULL, _("Show Debug Info"), 0, popup);
           action->setToggleAction(TRUE);
           connect(action, SIGNAL(toggled(bool)), SLOT(setShowDebug(bool)));
           connect(this, SIGNAL(showDebugChanged(bool)), action, SLOT(setOn(bool)));
@@ -1189,11 +1188,11 @@ ConfigSearchWindow::ConfigSearchWindow(ConfigMainWindow* parent, const char *nam
 
         QVBoxLayout* layout1 = new QVBoxLayout(this, 11, 6);
         QHBoxLayout* layout2 = new QHBoxLayout(0, 0, 6);
-        layout2->addWidget(new QLabel("Find:", this));
+        layout2->addWidget(new QLabel(_("Find:"), this));
         editField = new QLineEdit(this);
         connect(editField, SIGNAL(returnPressed()), SLOT(search()));
         layout2->addWidget(editField);
-        searchButton = new QPushButton("Search", this);
+        searchButton = new QPushButton(_("Search"), this);
         searchButton->setAutoDefault(FALSE);
         connect(searchButton, SIGNAL(clicked()), SLOT(search()));
         layout2->addWidget(searchButton);
@@ -1313,58 +1312,58 @@ ConfigMainWindow::ConfigMainWindow(void)
         menu = menuBar();
         toolBar = new QToolBar("Tools", this);
 
-        backAction = new QAction("Back", QPixmap(xpm_back), "Back", 0, this);
+        backAction = new QAction("Back", QPixmap(xpm_back), _("Back"), 0, this);
           connect(backAction, SIGNAL(activated()), SLOT(goBack()));
           backAction->setEnabled(FALSE);
-        QAction *quitAction = new QAction("Quit", "&Quit", CTRL+Key_Q, this);
+        QAction *quitAction = new QAction("Quit", _("&Quit"), CTRL+Key_Q, this);
           connect(quitAction, SIGNAL(activated()), SLOT(close()));
-        QAction *loadAction = new QAction("Load", QPixmap(xpm_load), "&Load", CTRL+Key_L, this);
+        QAction *loadAction = new QAction("Load", QPixmap(xpm_load), _("&Load"), CTRL+Key_L, this);
           connect(loadAction, SIGNAL(activated()), SLOT(loadConfig()));
-        saveAction = new QAction("Save", QPixmap(xpm_save), "&Save", CTRL+Key_S, this);
+        saveAction = new QAction("Save", QPixmap(xpm_save), _("&Save"), CTRL+Key_S, this);
           connect(saveAction, SIGNAL(activated()), SLOT(saveConfig()));
         conf_set_changed_callback(conf_changed);
         // Set saveAction's initial state
         conf_changed();
-        QAction *saveAsAction = new QAction("Save As...", "Save &As...", 0, this);
+        QAction *saveAsAction = new QAction("Save As...", _("Save &As..."), 0, this);
           connect(saveAsAction, SIGNAL(activated()), SLOT(saveConfigAs()));
-        QAction *searchAction = new QAction("Find", "&Find", CTRL+Key_F, this);
+        QAction *searchAction = new QAction("Find", _("&Find"), CTRL+Key_F, this);
           connect(searchAction, SIGNAL(activated()), SLOT(searchConfig()));
-        QAction *singleViewAction = new QAction("Single View", QPixmap(xpm_single_view), "Split View", 0, this);
+        QAction *singleViewAction = new QAction("Single View", QPixmap(xpm_single_view), _("Single View"), 0, this);
           connect(singleViewAction, SIGNAL(activated()), SLOT(showSingleView()));
-        QAction *splitViewAction = new QAction("Split View", QPixmap(xpm_split_view), "Split View", 0, this);
+        QAction *splitViewAction = new QAction("Split View", QPixmap(xpm_split_view), _("Split View"), 0, this);
           connect(splitViewAction, SIGNAL(activated()), SLOT(showSplitView()));
-        QAction *fullViewAction = new QAction("Full View", QPixmap(xpm_tree_view), "Full View", 0, this);
+        QAction *fullViewAction = new QAction("Full View", QPixmap(xpm_tree_view), _("Full View"), 0, this);
           connect(fullViewAction, SIGNAL(activated()), SLOT(showFullView()));
 
-        QAction *showNameAction = new QAction(NULL, "Show Name", 0, this);
+        QAction *showNameAction = new QAction(NULL, _("Show Name"), 0, this);
           showNameAction->setToggleAction(TRUE);
           connect(showNameAction, SIGNAL(toggled(bool)), configView, SLOT(setShowName(bool)));
           connect(configView, SIGNAL(showNameChanged(bool)), showNameAction, SLOT(setOn(bool)));
           showNameAction->setOn(configView->showName());
-        QAction *showRangeAction = new QAction(NULL, "Show Range", 0, this);
+        QAction *showRangeAction = new QAction(NULL, _("Show Range"), 0, this);
           showRangeAction->setToggleAction(TRUE);
           connect(showRangeAction, SIGNAL(toggled(bool)), configView, SLOT(setShowRange(bool)));
           connect(configView, SIGNAL(showRangeChanged(bool)), showRangeAction, SLOT(setOn(bool)));
           showRangeAction->setOn(configList->showRange);
-        QAction *showDataAction = new QAction(NULL, "Show Data", 0, this);
+        QAction *showDataAction = new QAction(NULL, _("Show Data"), 0, this);
           showDataAction->setToggleAction(TRUE);
           connect(showDataAction, SIGNAL(toggled(bool)), configView, SLOT(setShowData(bool)));
           connect(configView, SIGNAL(showDataChanged(bool)), showDataAction, SLOT(setOn(bool)));
           showDataAction->setOn(configList->showData);
-        QAction *showAllAction = new QAction(NULL, "Show All Options", 0, this);
+        QAction *showAllAction = new QAction(NULL, _("Show All Options"), 0, this);
           showAllAction->setToggleAction(TRUE);
           connect(showAllAction, SIGNAL(toggled(bool)), configView, SLOT(setShowAll(bool)));
           connect(showAllAction, SIGNAL(toggled(bool)), menuView, SLOT(setShowAll(bool)));
           showAllAction->setOn(configList->showAll);
-        QAction *showDebugAction = new QAction(NULL, "Show Debug Info", 0, this);
+        QAction *showDebugAction = new QAction(NULL, _("Show Debug Info"), 0, this);
           showDebugAction->setToggleAction(TRUE);
           connect(showDebugAction, SIGNAL(toggled(bool)), helpText, SLOT(setShowDebug(bool)));
           connect(helpText, SIGNAL(showDebugChanged(bool)), showDebugAction, SLOT(setOn(bool)));
           showDebugAction->setOn(helpText->showDebug());
 
-        QAction *showIntroAction = new QAction(NULL, "Introduction", 0, this);
+        QAction *showIntroAction = new QAction(NULL, _("Introduction"), 0, this);
           connect(showIntroAction, SIGNAL(activated()), SLOT(showIntro()));
-        QAction *showAboutAction = new QAction(NULL, "About", 0, this);
+        QAction *showAboutAction = new QAction(NULL, _("About"), 0, this);
           connect(showAboutAction, SIGNAL(activated()), SLOT(showAbout()));
 
         // init tool bar
@@ -1379,7 +1378,7 @@ ConfigMainWindow::ConfigMainWindow(void)
 
         // create config menu
         QPopupMenu* config = new QPopupMenu(this);
-        menu->insertItem("&File", config);
+        menu->insertItem(_("&File"), config);
         loadAction->addTo(config);
         saveAction->addTo(config);
         saveAsAction->addTo(config);
@@ -1388,12 +1387,12 @@ ConfigMainWindow::ConfigMainWindow(void)
 
         // create edit menu
         QPopupMenu* editMenu = new QPopupMenu(this);
-        menu->insertItem("&Edit", editMenu);
+        menu->insertItem(_("&Edit"), editMenu);
         searchAction->addTo(editMenu);
 
         // create options menu
         QPopupMenu* optionMenu = new QPopupMenu(this);
-        menu->insertItem("&Option", optionMenu);
+        menu->insertItem(_("&Option"), optionMenu);
         showNameAction->addTo(optionMenu);
         showRangeAction->addTo(optionMenu);
         showDataAction->addTo(optionMenu);
@@ -1404,7 +1403,7 @@ ConfigMainWindow::ConfigMainWindow(void)
         // create help menu
         QPopupMenu* helpMenu = new QPopupMenu(this);
         menu->insertSeparator();
-        menu->insertItem("&Help", helpMenu);
+        menu->insertItem(_("&Help"), helpMenu);
         showIntroAction->addTo(helpMenu);
         showAboutAction->addTo(helpMenu);
 
@@ -1452,14 +1451,14 @@ void ConfigMainWindow::loadConfig(void)
         if (s.isNull())
                 return;
         if (conf_read(QFile::encodeName(s)))
-                QMessageBox::information(this, "qconf", "Unable to load configuration!");
+                QMessageBox::information(this, "qconf", _("Unable to load configuration!"));
         ConfigView::updateListAll();
 }
 
 void ConfigMainWindow::saveConfig(void)
 {
         if (conf_write(NULL))
-                QMessageBox::information(this, "qconf", "Unable to save configuration!");
+                QMessageBox::information(this, "qconf", _("Unable to save configuration!"));
 }
 
 void ConfigMainWindow::saveConfigAs(void)
@@ -1468,7 +1467,7 @@ void ConfigMainWindow::saveConfigAs(void)
         if (s.isNull())
                 return;
         if (conf_write(QFile::encodeName(s)))
-                QMessageBox::information(this, "qconf", "Unable to save configuration!");
+                QMessageBox::information(this, "qconf", _("Unable to save configuration!"));
 }
 
 void ConfigMainWindow::searchConfig(void)
@@ -1612,11 +1611,11 @@ void ConfigMainWindow::closeEvent(QCloseEvent* e)
                 e->accept();
                 return;
         }
-        QMessageBox mb("qconf", "Save configuration?", QMessageBox::Warning,
+        QMessageBox mb("qconf", _("Save configuration?"), QMessageBox::Warning,
                         QMessageBox::Yes | QMessageBox::Default, QMessageBox::No, QMessageBox::Cancel | QMessageBox::Escape);
-        mb.setButtonText(QMessageBox::Yes, "&Save Changes");
-        mb.setButtonText(QMessageBox::No, "&Discard Changes");
-        mb.setButtonText(QMessageBox::Cancel, "Cancel Exit");
+        mb.setButtonText(QMessageBox::Yes, _("&Save Changes"));
+        mb.setButtonText(QMessageBox::No, _("&Discard Changes"));
+        mb.setButtonText(QMessageBox::Cancel, _("Cancel Exit"));
         switch (mb.exec()) {
         case QMessageBox::Yes:
                 conf_write(NULL);
@@ -1631,7 +1630,7 @@ void ConfigMainWindow::closeEvent(QCloseEvent* e)
 
 void ConfigMainWindow::showIntro(void)
 {
-        static char str[] = "Welcome to the qconf graphical kernel configuration tool for Linux.\n\n"
+        static const QString str = _("Welcome to the qconf graphical kernel configuration tool for Linux.\n\n"
                 "For each option, a blank box indicates the feature is disabled, a check\n"
                 "indicates it is enabled, and a dot indicates that it is to be compiled\n"
                 "as a module.  Clicking on the box will cycle through the three states.\n\n"
@@ -1641,15 +1640,15 @@ void ConfigMainWindow::showIntro(void)
                 "options must be enabled to support the option you are interested in, you can\n"
                 "still view the help of a grayed-out option.\n\n"
                 "Toggling Show Debug Info under the Options menu will show the dependencies,\n"
-                "which you can then match by examining other options.\n\n";
+                "which you can then match by examining other options.\n\n");
 
         QMessageBox::information(this, "qconf", str);
 }
 
 void ConfigMainWindow::showAbout(void)
 {
-        static char str[] = "qconf is Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>.\n\n"
-                "Bug reports and feature request can also be entered at http://bugzilla.kernel.org/\n";
+        static const QString str = _("qconf is Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>.\n\n"
+                "Bug reports and feature request can also be entered at http://bugzilla.kernel.org/\n");
 
         QMessageBox::information(this, "qconf", str);
 }
@@ -1707,7 +1706,7 @@ static const char *progname;
 
 static void usage(void)
 {
-        printf("%s <config>\n", progname);
+        printf(_("%s <config>\n"), progname);
         exit(0);
 }
 
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index c35dcc5d6189..3929e5b35e79 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -34,6 +34,8 @@ struct symbol *sym_defconfig_list;
 struct symbol *modules_sym;
 tristate modules_val;
 
+struct expr *sym_env_list;
+
 void sym_add_default(struct symbol *sym, const char *def)
 {
         struct property *prop = prop_alloc(P_DEFAULT, sym);
@@ -45,7 +47,6 @@ void sym_init(void)
 {
         struct symbol *sym;
         struct utsname uts;
-        char *p;
         static bool inited = false;
 
         if (inited)
@@ -54,20 +55,6 @@ void sym_init(void)
 
         uname(&uts);
 
-        sym = sym_lookup("ARCH", 0);
-        sym->type = S_STRING;
-        sym->flags |= SYMBOL_AUTO;
-        p = getenv("ARCH");
-        if (p)
-                sym_add_default(sym, p);
-
-        sym = sym_lookup("KERNELVERSION", 0);
-        sym->type = S_STRING;
-        sym->flags |= SYMBOL_AUTO;
-        p = getenv("KERNELVERSION");
-        if (p)
-                sym_add_default(sym, p);
-
         sym = sym_lookup("UNAME_RELEASE", 0);
         sym->type = S_STRING;
         sym->flags |= SYMBOL_AUTO;
@@ -117,6 +104,15 @@ struct property *sym_get_choice_prop(struct symbol *sym)
         return NULL;
 }
 
+struct property *sym_get_env_prop(struct symbol *sym)
+{
+        struct property *prop;
+
+        for_all_properties(sym, prop, P_ENV)
+                return prop;
+        return NULL;
+}
+
 struct property *sym_get_default_prop(struct symbol *sym)
 {
         struct property *prop;
@@ -199,7 +195,7 @@ static void sym_calc_visibility(struct symbol *sym)
         tri = no;
         for_all_prompts(sym, prop) {
                 prop->visible.tri = expr_calc_value(prop->visible.expr);
-                tri = E_OR(tri, prop->visible.tri);
+                tri = EXPR_OR(tri, prop->visible.tri);
         }
         if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
                 tri = yes;
@@ -247,8 +243,7 @@ static struct symbol *sym_calc_choice(struct symbol *sym)
 
         /* just get the first visible value */
         prop = sym_get_choice_prop(sym);
-        for (e = prop->expr; e; e = e->left.expr) {
-                def_sym = e->right.sym;
+        expr_list_for_each_sym(prop->expr, e, def_sym) {
                 sym_calc_visibility(def_sym);
                 if (def_sym->visible != no)
                         return def_sym;
@@ -303,7 +298,7 @@ void sym_calc_value(struct symbol *sym)
                 if (sym_is_choice_value(sym) && sym->visible == yes) {
                         prop = sym_get_choice_prop(sym);
                         newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
-                } else if (E_OR(sym->visible, sym->rev_dep.tri) != no) {
+                } else if (EXPR_OR(sym->visible, sym->rev_dep.tri) != no) {
                         sym->flags |= SYMBOL_WRITE;
                         if (sym_has_value(sym))
                                 newval.tri = sym->def[S_DEF_USER].tri;
@@ -312,7 +307,7 @@ void sym_calc_value(struct symbol *sym)
                                 if (prop)
                                         newval.tri = expr_calc_value(prop->expr);
                         }
-                        newval.tri = E_OR(E_AND(newval.tri, sym->visible), sym->rev_dep.tri);
+                        newval.tri = EXPR_OR(EXPR_AND(newval.tri, sym->visible), sym->rev_dep.tri);
                 } else if (!sym_is_choice(sym)) {
                         prop = sym_get_default_prop(sym);
                         if (prop) {
@@ -347,6 +342,9 @@ void sym_calc_value(struct symbol *sym)
                 ;
         }
 
+        if (sym->flags & SYMBOL_AUTO)
+                sym->flags &= ~SYMBOL_WRITE;
+
         sym->curr = newval;
         if (sym_is_choice(sym) && newval.tri == yes)
                 sym->curr.val = sym_calc_choice(sym);
@@ -361,12 +359,14 @@ void sym_calc_value(struct symbol *sym)
         }
 
         if (sym_is_choice(sym)) {
+                struct symbol *choice_sym;
                 int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE);
+
                 prop = sym_get_choice_prop(sym);
-                for (e = prop->expr; e; e = e->left.expr) {
-                        e->right.sym->flags |= flags;
+                expr_list_for_each_sym(prop->expr, e, choice_sym) {
+                        choice_sym->flags |= flags;
                         if (flags & SYMBOL_CHANGED)
-                                sym_set_changed(e->right.sym);
+                                sym_set_changed(choice_sym);
                 }
         }
 }
@@ -849,7 +849,7 @@ struct property *prop_alloc(enum prop_type type, struct symbol *sym)
 struct symbol *prop_get_symbol(struct property *prop)
 {
         if (prop->expr && (prop->expr->type == E_SYMBOL ||
-                           prop->expr->type == E_CHOICE))
+                           prop->expr->type == E_LIST))
                 return prop->expr->left.sym;
         return NULL;
 }
@@ -859,6 +859,8 @@ const char *prop_get_type_name(enum prop_type type)
         switch (type) {
         case P_PROMPT:
                 return "prompt";
+        case P_ENV:
+                return "env";
         case P_COMMENT:
                 return "comment";
         case P_MENU:
@@ -876,3 +878,32 @@ const char *prop_get_type_name(enum prop_type type)
         }
         return "unknown";
 }
+
+void prop_add_env(const char *env)
+{
+        struct symbol *sym, *sym2;
+        struct property *prop;
+        char *p;
+
+        sym = current_entry->sym;
+        sym->flags |= SYMBOL_AUTO;
+        for_all_properties(sym, prop, P_ENV) {
+                sym2 = prop_get_symbol(prop);
+                if (strcmp(sym2->name, env))
+                        menu_warn(current_entry, "redefining environment symbol from %s",
+                                  sym2->name);
+                return;
+        }
+
+        prop = prop_alloc(P_ENV, sym);
+        prop->expr = expr_alloc_symbol(sym_lookup(env, 1));
+
+        sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
+        sym_env_list->right.sym = sym;
+
+        p = getenv(env);
+        if (p)
+                sym_add_default(sym, p);
+        else
+                menu_warn(current_entry, "environment variable %s undefined", env);
+}
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
index e1cad924c0a4..f8e73c039dc8 100644
--- a/scripts/kconfig/util.c
+++ b/scripts/kconfig/util.c
@@ -29,6 +29,8 @@ struct file *file_lookup(const char *name)
 /* write a dependency file as used by kbuild to track dependencies */
 int file_write_dep(const char *name)
 {
+        struct symbol *sym, *env_sym;
+        struct expr *e;
         struct file *file;
         FILE *out;
 
@@ -45,8 +47,25 @@ int file_write_dep(const char *name)
                         fprintf(out, "\t%s\n", file->name);
         }
         fprintf(out, "\ninclude/config/auto.conf: \\\n"
-                     "\t$(deps_config)\n\n"
-                     "$(deps_config): ;\n");
+                     "\t$(deps_config)\n\n");
+
+        expr_list_for_each_sym(sym_env_list, e, sym) {
+                struct property *prop;
+                const char *value;
+
+                prop = sym_get_env_prop(sym);
+                env_sym = prop_get_symbol(prop);
+                if (!env_sym)
+                        continue;
+                value = getenv(env_sym->name);
+                if (!value)
+                        value = "";
+                fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
+                fprintf(out, "include/config/auto.conf: FORCE\n");
+                fprintf(out, "endif\n");
+        }
+
+        fprintf(out, "\n$(deps_config): ;\n");
         fclose(out);
         rename("..config.tmp", name);
         return 0;
diff --git a/scripts/kconfig/zconf.gperf b/scripts/kconfig/zconf.gperf
index 93538e567bda..25ef5d01c0af 100644
--- a/scripts/kconfig/zconf.gperf
+++ b/scripts/kconfig/zconf.gperf
@@ -35,10 +35,10 @@ int,		T_TYPE,		TF_COMMAND, S_INT
 hex,            T_TYPE,         TF_COMMAND, S_HEX
 string,         T_TYPE,         TF_COMMAND, S_STRING
 select,         T_SELECT,       TF_COMMAND
-enable,         T_SELECT,       TF_COMMAND
 range,          T_RANGE,        TF_COMMAND
 option,         T_OPTION,       TF_COMMAND
 on,             T_ON,           TF_PARAM
 modules,        T_OPT_MODULES,  TF_OPTION
 defconfig_list, T_OPT_DEFCONFIG_LIST,TF_OPTION
+env,            T_OPT_ENV,      TF_OPTION
 %%
diff --git a/scripts/kconfig/zconf.hash.c_shipped b/scripts/kconfig/zconf.hash.c_shipped
index ab28b18153a7..5c73d51339d8 100644
--- a/scripts/kconfig/zconf.hash.c_shipped
+++ b/scripts/kconfig/zconf.hash.c_shipped
@@ -1,4 +1,4 @@
-/* ANSI-C code produced by gperf version 3.0.2 */
+/* ANSI-C code produced by gperf version 3.0.3 */
 /* Command-line: gperf  */
 /* Computed positions: -k'1,3' */
 
@@ -53,9 +53,9 @@ kconf_id_hash (register const char *str, register unsigned int len)
       49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
       49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
       49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
-      49, 49, 49, 49, 49, 49, 49, 18, 11,  5,
+      49, 49, 49, 49, 49, 49, 49, 49, 11,  5,
        0,  0,  5, 49,  5, 20, 49, 49,  5, 20,
-       5,  0, 30, 49,  0, 15,  0, 10, 49, 49,
+       5,  0, 30, 49,  0, 15,  0, 10,  0, 49,
       25, 49, 49, 49, 49, 49, 49, 49, 49, 49,
       49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
       49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
@@ -89,6 +89,7 @@ kconf_id_hash (register const char *str, register unsigned int len)
 struct kconf_id_strings_t
   {
     char kconf_id_strings_str2[sizeof("on")];
+    char kconf_id_strings_str3[sizeof("env")];
     char kconf_id_strings_str5[sizeof("endif")];
     char kconf_id_strings_str6[sizeof("option")];
     char kconf_id_strings_str7[sizeof("endmenu")];
@@ -107,7 +108,6 @@ struct kconf_id_strings_t
     char kconf_id_strings_str21[sizeof("string")];
     char kconf_id_strings_str22[sizeof("if")];
     char kconf_id_strings_str23[sizeof("int")];
-    char kconf_id_strings_str24[sizeof("enable")];
     char kconf_id_strings_str26[sizeof("select")];
     char kconf_id_strings_str27[sizeof("modules")];
     char kconf_id_strings_str28[sizeof("tristate")];
@@ -123,6 +123,7 @@ struct kconf_id_strings_t
 static struct kconf_id_strings_t kconf_id_strings_contents =
   {
     "on",
+    "env",
     "endif",
     "option",
     "endmenu",
@@ -141,7 +142,6 @@ static struct kconf_id_strings_t kconf_id_strings_contents =
     "string",
     "if",
     "int",
-    "enable",
     "select",
     "modules",
     "tristate",
@@ -157,6 +157,9 @@ static struct kconf_id_strings_t kconf_id_strings_contents =
 #define kconf_id_strings ((const char *) &kconf_id_strings_contents)
 #ifdef __GNUC__
 __inline
+#ifdef __GNUC_STDC_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
 #endif
 struct kconf_id *
 kconf_id_lookup (register const char *str, register unsigned int len)
@@ -174,7 +177,8 @@ kconf_id_lookup (register const char *str, register unsigned int len)
     {
       {-1}, {-1},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str2,             T_ON,           TF_PARAM},
-      {-1}, {-1},
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str3,             T_OPT_ENV,      TF_OPTION},
+      {-1},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str5,             T_ENDIF,        TF_COMMAND},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str6,             T_OPTION,       TF_COMMAND},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str7,     T_ENDMENU,      TF_COMMAND},
@@ -194,8 +198,7 @@ kconf_id_lookup (register const char *str, register unsigned int len)
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str21,            T_TYPE,         TF_COMMAND, S_STRING},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str22,            T_IF,           TF_COMMAND|TF_PARAM},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str23,            T_TYPE,         TF_COMMAND, S_INT},
-      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str24,            T_SELECT,       TF_COMMAND},
-      {-1},
+      {-1}, {-1},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str26,            T_SELECT,       TF_COMMAND},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str27,    T_OPT_MODULES,  TF_OPTION},
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str28,    T_TYPE,         TF_COMMAND, S_TRISTATE},
diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
index 187d38ccadd5..4cea5c85cd0a 100644
--- a/scripts/kconfig/zconf.l
+++ b/scripts/kconfig/zconf.l
@@ -217,6 +217,11 @@ n	[A-Za-z0-9_]
                 append_string("\n", 1);
         }
         [^ \t\n].* {
+                while (yyleng) {
+                        if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
+                                break;
+                        yyleng--;
+                }
                 append_string(yytext, yyleng);
                 if (!first_ts)
                         first_ts = last_ts;
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 1d1401807e95..ec54f12f57b0 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -46,21 +46,24 @@ use strict;
 # Note: This only supports 'c'.
 
 # usage:
-# kernel-doc [ -docbook | -html | -text | -man ]
+# kernel-doc [ -docbook | -html | -text | -man ] [ -no-doc-sections ]
 #           [ -function funcname [ -function funcname ...] ] c file(s)s > outputfile
 # or
 #           [ -nofunction funcname [ -function funcname ...] ] c file(s)s > outputfile
 #
 #  Set output format using one of -docbook -html -text or -man.  Default is man.
 #
+#  -no-doc-sections
+#       Do not output DOC: sections
+#
 #  -function funcname
-#       If set, then only generate documentation for the given function(s).  All
-#       other functions are ignored.
+#       If set, then only generate documentation for the given function(s) or
+#       DOC: section titles.  All other functions and DOC: sections are ignored.
 #
 #  -nofunction funcname
-#       If set, then only generate documentation for the other function(s).
-#       Cannot be used together with -function
-#       (yes, that's a bug -- perl hackers can fix it 8))
+#       If set, then only generate documentation for the other function(s)/DOC:
+#       sections. Cannot be used together with -function (yes, that's a bug --
+#       perl hackers can fix it 8))
 #
 #  c files - list of 'c' files to process
 #
@@ -182,10 +185,10 @@ my $blankline_html = $local_lt . "p" . $local_gt;	# was "<p>"
 my %highlights_xml = ( "([^=])\\\"([^\\\"<]+)\\\"", "\$1<quote>\$2</quote>",
                         $type_constant, "<constant>\$1</constant>",
                         $type_func, "<function>\$1</function>",
-                        $type_struct, "<structname>\$1</structname>",
+                        $type_struct_xml, "<structname>\$1</structname>",
                         $type_env, "<envar>\$1</envar>",
                         $type_param, "<parameter>\$1</parameter>" );
-my $blankline_xml = "</para><para>\n";
+my $blankline_xml = $local_lt . "/para" . $local_gt . $local_lt . "para" . $local_gt . "\n";
 
 # gnome, docbook format
 my %highlights_gnome = ( $type_constant, "<replaceable class=\"option\">\$1</replaceable>",
@@ -211,7 +214,7 @@ my $blankline_text = "";
 
 
 sub usage {
-    print "Usage: $0 [ -v ] [ -docbook | -html | -text | -man ]\n";
+    print "Usage: $0 [ -v ] [ -docbook | -html | -text | -man ] [ -no-doc-sections ]\n";
     print "         [ -function funcname [ -function funcname ...] ]\n";
     print "         [ -nofunction funcname [ -nofunction funcname ...] ]\n";
     print "         c source file(s) > outputfile\n";
@@ -225,6 +228,7 @@ if ($#ARGV==-1) {
 
 my $verbose = 0;
 my $output_mode = "man";
+my $no_doc_sections = 0;
 my %highlights = %highlights_man;
 my $blankline = $blankline_man;
 my $modulename = "Kernel API";
@@ -329,12 +333,14 @@ while ($ARGV[0] =~ m/^-(.*)/) {
         usage();
     } elsif ($cmd eq '-filelist') {
             $filelist = shift @ARGV;
+    } elsif ($cmd eq '-no-doc-sections') {
+            $no_doc_sections = 1;
     }
 }
 
 # get kernel version from env
 sub get_kernel_version() {
-    my $version;
+    my $version = 'unknown kernel version';
 
     if (defined($ENV{'KERNELVERSION'})) {
         $version = $ENV{'KERNELVERSION'};
@@ -374,6 +380,29 @@ sub dump_section {
 }
 
 ##
+# dump DOC: section after checking that it should go out
+#
+sub dump_doc_section {
+    my $name = shift;
+    my $contents = join "\n", @_;
+
+    if ($no_doc_sections) {
+        return;
+    }
+
+    if (($function_only == 0) ||
+        ( $function_only == 1 && defined($function_table{$name})) ||
+        ( $function_only == 2 && !defined($function_table{$name})))
+    {
+        dump_section $name, $contents;
+        output_blockhead({'sectionlist' => \@sectionlist,
+                          'sections' => \%sections,
+                          'module' => $modulename,
+                          'content-only' => ($function_only != 0), });
+    }
+}
+
+##
 # output function
 #
 # parameterdescs, a hash.
@@ -394,7 +423,7 @@ sub output_highlight {
 #       confess "output_highlight got called with no args?\n";
 #   }
 
-    if ($output_mode eq "html") {
+    if ($output_mode eq "html" || $output_mode eq "xml") {
         $contents = local_unescape($contents);
         # convert data read & converted thru xml_escape() into &xyz; format:
         $contents =~ s/\\\\\\/&/g;
@@ -564,8 +593,8 @@ sub output_function_html(%) {
     print "<hr>\n";
 }
 
-# output intro in html
-sub output_intro_html(%) {
+# output DOC: block header in html
+sub output_blockhead_html(%) {
     my %args = %{$_[0]};
     my ($parameter, $section);
     my $count;
@@ -871,7 +900,7 @@ sub output_typedef_xml(%) {
 }
 
 # output in XML DocBook
-sub output_intro_xml(%) {
+sub output_blockhead_xml(%) {
     my %args = %{$_[0]};
     my ($parameter, $section);
     my $count;
@@ -882,15 +911,23 @@ sub output_intro_xml(%) {
     # print out each section
     $lineprefix="   ";
     foreach $section (@{$args{'sectionlist'}}) {
-        print "<refsect1>\n <title>$section</title>\n <para>\n";
+        if (!$args{'content-only'}) {
+                print "<refsect1>\n <title>$section</title>\n";
+        }
         if ($section =~ m/EXAMPLE/i) {
             print "<example><para>\n";
+        } else {
+            print "<para>\n";
         }
         output_highlight($args{'sections'}{$section});
         if ($section =~ m/EXAMPLE/i) {
             print "</para></example>\n";
+        } else {
+            print "</para>";
+        }
+        if (!$args{'content-only'}) {
+                print "\n</refsect1>\n";
         }
-        print " </para>\n</refsect1>\n";
     }
 
     print "\n\n";
@@ -1137,7 +1174,7 @@ sub output_typedef_man(%) {
     }
 }
 
-sub output_intro_man(%) {
+sub output_blockhead_man(%) {
     my %args = %{$_[0]};
     my ($parameter, $section);
     my $count;
@@ -1294,7 +1331,7 @@ sub output_struct_text(%) {
     output_section_text(@_);
 }
 
-sub output_intro_text(%) {
+sub output_blockhead_text(%) {
     my %args = %{$_[0]};
     my ($parameter, $section);
 
@@ -1325,9 +1362,9 @@ sub output_declaration {
 
 ##
 # generic output function - calls the right one based on current output mode.
-sub output_intro {
+sub output_blockhead {
     no strict 'refs';
-    my $func = "output_intro_".$output_mode;
+    my $func = "output_blockhead_".$output_mode;
     &$func(@_);
     $section_counter++;
 }
@@ -1926,9 +1963,7 @@ sub process_file($) {
         } elsif ($state == 4) {
                 # Documentation block
                 if (/$doc_block/) {
-                        dump_section($section, xml_escape($contents));
-                        output_intro({'sectionlist' => \@sectionlist,
-                                      'sections' => \%sections });
+                        dump_doc_section($section, xml_escape($contents));
                         $contents = "";
                         $function = "";
                         %constants = ();
@@ -1946,9 +1981,7 @@ sub process_file($) {
                 }
                 elsif (/$doc_end/)
                 {
-                        dump_section($section, xml_escape($contents));
-                        output_intro({'sectionlist' => \@sectionlist,
-                                      'sections' => \%sections });
+                        dump_doc_section($section, xml_escape($contents));
                         $contents = "";
                         $function = "";
                         %constants = ();
diff --git a/scripts/mkmakefile b/scripts/mkmakefile
index e0f54b9d8fec..e65d8b33faa4 100644
--- a/scripts/mkmakefile
+++ b/scripts/mkmakefile
@@ -25,8 +25,11 @@ cat << EOF > $2/Makefile
 VERSION = $3
 PATCHLEVEL = $4
 
-KERNELSRC    := $1
-KERNELOUTPUT := $2
+lastword = \$(word \$(words \$(1)),\$(1))
+makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
+
+MAKEARGS := -C $1
+MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
 
 MAKEFLAGS += --no-print-directory
 
@@ -35,10 +38,11 @@ MAKEFLAGS += --no-print-directory
 all     := \$(filter-out all Makefile,\$(MAKECMDGOALS))
 
 all:
-        \$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT) \$(all)
+        \$(MAKE) \$(MAKEARGS) \$(all)
 
 Makefile:;
 
 \$(all) %/: all
         @:
+
 EOF
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 93ac52adb498..f8efc93eb700 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2,7 +2,7 @@
  *
  * Copyright 2003       Kai Germaschewski
  * Copyright 2002-2004  Rusty Russell, IBM Corporation
- * Copyright 2006       Sam Ravnborg
+ * Copyright 2006-2008  Sam Ravnborg
  * Based in part on module-init-tools/depmod.c,file2alias
  *
  * This software may be used and distributed according to the terms
@@ -28,12 +28,17 @@ static int vmlinux_section_warnings = 1;
 /* Only warn about unresolved symbols */
 static int warn_unresolved = 0;
 /* How a symbol is exported */
+static int sec_mismatch_count = 0;
+static int sec_mismatch_verbose = 1;
+
 enum export {
         export_plain,      export_unused,     export_gpl,
         export_unused_gpl, export_gpl_future, export_unknown
 };
 
-void fatal(const char *fmt, ...)
+#define PRINTF __attribute__ ((format (printf, 1, 2)))
+
+PRINTF void fatal(const char *fmt, ...)
 {
         va_list arglist;
 
@@ -46,7 +51,7 @@ void fatal(const char *fmt, ...)
         exit(1);
 }
 
-void warn(const char *fmt, ...)
+PRINTF void warn(const char *fmt, ...)
 {
         va_list arglist;
 
@@ -57,7 +62,7 @@ void warn(const char *fmt, ...)
         va_end(arglist);
 }
 
-void merror(const char *fmt, ...)
+PRINTF void merror(const char *fmt, ...)
 {
         va_list arglist;
 
@@ -72,7 +77,8 @@ static int is_vmlinux(const char *modname)
 {
         const char *myname;
 
-        if ((myname = strrchr(modname, '/')))
+        myname = strrchr(modname, '/');
+        if (myname)
                 myname++;
         else
                 myname = modname;
@@ -83,14 +89,13 @@ static int is_vmlinux(const char *modname)
 
 void *do_nofail(void *ptr, const char *expr)
 {
-        if (!ptr) {
+        if (!ptr)
                 fatal("modpost: Memory allocation failure: %s.\n", expr);
-        }
+
         return ptr;
 }
 
 /* A list of all modules we processed */
-
 static struct module *modules;
 
 static struct module *find_module(char *modname)
@@ -113,7 +118,8 @@ static struct module *new_module(char *modname)
         p = NOFAIL(strdup(modname));
 
         /* strip trailing .o */
-        if ((s = strrchr(p, '.')) != NULL)
+        s = strrchr(p, '.');
+        if (s != NULL)
                 if (strcmp(s, ".o") == 0)
                         *s = '\0';
 
@@ -154,7 +160,7 @@ static inline unsigned int tdb_hash(const char *name)
         unsigned   i;   /* Used to cycle through random values. */
 
         /* Set the initial value from the key size. */
-        for (value = 0x238F13AF * strlen(name), i=0; name[i]; i++)
+        for (value = 0x238F13AF * strlen(name), i = 0; name[i]; i++)
                 value = (value + (((unsigned char *)name)[i] << (i*5 % 24)));
 
         return (1103515243 * value + 12345);
@@ -198,7 +204,7 @@ static struct symbol *find_symbol(const char *name)
         if (name[0] == '.')
                 name++;
 
-        for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s=s->next) {
+        for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s = s->next) {
                 if (strcmp(s->name, name) == 0)
                         return s;
         }
@@ -223,9 +229,10 @@ static const char *export_str(enum export ex)
         return export_list[ex].str;
 }
 
-static enum export export_no(const char * s)
+static enum export export_no(const char *s)
 {
         int i;
+
         if (!s)
                 return export_unknown;
         for (i = 0; export_list[i].export != export_unknown; i++) {
@@ -315,7 +322,7 @@ void *grab_file(const char *filename, unsigned long *size)
   * spaces in the beginning of the line is trimmed away.
   * Return a pointer to a static buffer.
   **/
-char* get_next_line(unsigned long *pos, void *file, unsigned long size)
+char *get_next_line(unsigned long *pos, void *file, unsigned long size)
 {
         static char line[4096];
         int skip = 1;
@@ -323,8 +330,7 @@ char* get_next_line(unsigned long *pos, void *file, unsigned long size)
         signed char *p = (signed char *)file + *pos;
         char *s = line;
 
-        for (; *pos < size ; (*pos)++)
-        {
+        for (; *pos < size ; (*pos)++) {
                 if (skip && isspace(*p)) {
                         p++;
                         continue;
@@ -386,7 +392,9 @@ static int parse_elf(struct elf_info *info, const char *filename)
 
         /* Check if file offset is correct */
         if (hdr->e_shoff > info->size) {
-                fatal("section header offset=%u in file '%s' is bigger then filesize=%lu\n", hdr->e_shoff, filename, info->size);
+                fatal("section header offset=%lu in file '%s' is bigger than "
+                      "filesize=%lu\n", (unsigned long)hdr->e_shoff,
+                      filename, info->size);
                 return 0;
         }
 
@@ -407,7 +415,10 @@ static int parse_elf(struct elf_info *info, const char *filename)
                 const char *secname;
 
                 if (sechdrs[i].sh_offset > info->size) {
-                        fatal("%s is truncated. sechdrs[i].sh_offset=%u > sizeof(*hrd)=%ul\n", filename, (unsigned int)sechdrs[i].sh_offset, sizeof(*hdr));
+                        fatal("%s is truncated. sechdrs[i].sh_offset=%lu > "
+                              "sizeof(*hrd)=%zu\n", filename,
+                              (unsigned long)sechdrs[i].sh_offset,
+                              sizeof(*hdr));
                         return 0;
                 }
                 secname = secstrings + sechdrs[i].sh_name;
@@ -434,9 +445,9 @@ static int parse_elf(struct elf_info *info, const char *filename)
                 info->strtab       = (void *)hdr +
                                      sechdrs[sechdrs[i].sh_link].sh_offset;
         }
-        if (!info->symtab_start) {
+        if (!info->symtab_start)
                 fatal("%s has no symtab?\n", filename);
-        }
+
         /* Fix endianness in symbols */
         for (sym = info->symtab_start; sym < info->symtab_stop; sym++) {
                 sym->st_shndx = TO_NATIVE(sym->st_shndx);
@@ -505,11 +516,13 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
 #endif
 
                 if (memcmp(symname, MODULE_SYMBOL_PREFIX,
-                           strlen(MODULE_SYMBOL_PREFIX)) == 0)
-                        mod->unres = alloc_symbol(symname +
-                                                  strlen(MODULE_SYMBOL_PREFIX),
-                                                  ELF_ST_BIND(sym->st_info) == STB_WEAK,
-                                                  mod->unres);
+                           strlen(MODULE_SYMBOL_PREFIX)) == 0) {
+                        mod->unres =
+                          alloc_symbol(symname +
+                                       strlen(MODULE_SYMBOL_PREFIX),
+                                       ELF_ST_BIND(sym->st_info) == STB_WEAK,
+                                       mod->unres);
+                }
                 break;
         default:
                 /* All exported symbols */
@@ -578,69 +591,303 @@ static char *get_modinfo(void *modinfo, unsigned long modinfo_len,
  **/
 static int strrcmp(const char *s, const char *sub)
 {
-        int slen, sublen;
+        int slen, sublen;
 
         if (!s || !sub)
                 return 1;
 
         slen = strlen(s);
-        sublen = strlen(sub);
+        sublen = strlen(sub);
 
         if ((slen == 0) || (sublen == 0))
                 return 1;
 
-        if (sublen > slen)
-                return 1;
+        if (sublen > slen)
+                return 1;
 
-        return memcmp(s + slen - sublen, sub, sublen);
+        return memcmp(s + slen - sublen, sub, sublen);
 }
 
-/*
- * Functions used only during module init is marked __init and is stored in
- * a .init.text section. Likewise data is marked __initdata and stored in
- * a .init.data section.
- * If this section is one of these sections return 1
- * See include/linux/init.h for the details
+static const char *sym_name(struct elf_info *elf, Elf_Sym *sym)
+{
+        if (sym)
+                return elf->strtab + sym->st_name;
+        else
+                return "";
+}
+
+static const char *sec_name(struct elf_info *elf, int shndx)
+{
+        Elf_Shdr *sechdrs = elf->sechdrs;
+        return (void *)elf->hdr +
+                elf->sechdrs[elf->hdr->e_shstrndx].sh_offset +
+                sechdrs[shndx].sh_name;
+}
+
+static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr)
+{
+        return (void *)elf->hdr +
+                elf->sechdrs[elf->hdr->e_shstrndx].sh_offset +
+                sechdr->sh_name;
+}
+
+/* if sym is empty or point to a string
+ * like ".[0-9]+" then return 1.
+ * This is the optional prefix added by ld to some sections
  */
-static int init_section(const char *name)
+static int number_prefix(const char *sym)
 {
-        if (strcmp(name, ".init") == 0)
-                return 1;
-        if (strncmp(name, ".init.", strlen(".init.")) == 0)
+        if (*sym++ == '\0')
                 return 1;
+        if (*sym != '.')
+                return 0;
+        do {
+                char c = *sym++;
+                if (c < '0' || c > '9')
+                        return 0;
+        } while (*sym);
+        return 1;
+}
+
+/* The pattern is an array of simple patterns.
+ * "foo" will match an exact string equal to "foo"
+ * "*foo" will match a string that ends with "foo"
+ * "foo*" will match a string that begins with "foo"
+ * "foo$" will match a string equal to "foo" or "foo.1"
+ *   where the '1' can be any number including several digits.
+ *   The $ syntax is for sections where ld append a dot number
+ *   to make section name unique.
+ */
+int match(const char *sym, const char * const pat[])
+{
+        const char *p;
+        while (*pat) {
+                p = *pat++;
+                const char *endp = p + strlen(p) - 1;
+
+                /* "*foo" */
+                if (*p == '*') {
+                        if (strrcmp(sym, p + 1) == 0)
+                                return 1;
+                }
+                /* "foo*" */
+                else if (*endp == '*') {
+                        if (strncmp(sym, p, strlen(p) - 1) == 0)
+                                return 1;
+                }
+                /* "foo$" */
+                else if (*endp == '$') {
+                        if (strncmp(sym, p, strlen(p) - 1) == 0) {
+                                if (number_prefix(sym + strlen(p) - 1))
+                                        return 1;
+                        }
+                }
+                /* no wildcards */
+                else {
+                        if (strcmp(p, sym) == 0)
+                                return 1;
+                }
+        }
+        /* no match */
         return 0;
 }
 
+/* sections that we do not want to do full section mismatch check on */
+static const char *section_white_list[] =
+        { ".debug*", ".stab*", ".note*", ".got*", ".toc*", NULL };
+
 /*
- * Functions used only during module exit is marked __exit and is stored in
- * a .exit.text section. Likewise data is marked __exitdata and stored in
- * a .exit.data section.
- * If this section is one of these sections return 1
- * See include/linux/init.h for the details
- **/
-static int exit_section(const char *name)
+ * Is this section one we do not want to check?
+ * This is often debug sections.
+ * If we are going to check this section then
+ * test if section name ends with a dot and a number.
+ * This is used to find sections where the linker have
+ * appended a dot-number to make the name unique.
+ * The cause of this is often a section specified in assembler
+ * without "ax" / "aw" and the same section used in .c
+ * code where gcc add these.
+ */
+static int check_section(const char *modname, const char *sec)
 {
-        if (strcmp(name, ".exit.text") == 0)
-                return 1;
-        if (strcmp(name, ".exit.data") == 0)
+        const char *e = sec + strlen(sec) - 1;
+        if (match(sec, section_white_list))
                 return 1;
-        return 0;
 
+        if (*e && isdigit(*e)) {
+                /* consume all digits */
+                while (*e && e != sec && isdigit(*e))
+                        e--;
+                if (*e == '.') {
+                        warn("%s (%s): unexpected section name.\n"
+                             "The (.[number]+) following section name are "
+                             "ld generated and not expected.\n"
+                             "Did you forget to use \"ax\"/\"aw\" "
+                             "in a .S file?\n"
+                             "Note that for example <linux/init.h> contains\n"
+                             "section definitions for use in .S files.\n\n",
+                             modname, sec);
+                }
+        }
+        return 0;
 }
 
-/*
- * Data sections are named like this:
- * .data | .data.rel | .data.rel.*
- * Return 1 if the specified section is a data section
+
+
+#define ALL_INIT_DATA_SECTIONS \
+        ".init.data$", ".devinit.data$", ".cpuinit.data$", ".meminit.data$"
+#define ALL_EXIT_DATA_SECTIONS \
+        ".exit.data$", ".devexit.data$", ".cpuexit.data$", ".memexit.data$"
+
+#define ALL_INIT_TEXT_SECTIONS \
+        ".init.text$", ".devinit.text$", ".cpuinit.text$", ".meminit.text$"
+#define ALL_EXIT_TEXT_SECTIONS \
+        ".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$"
+
+#define ALL_INIT_SECTIONS ALL_INIT_DATA_SECTIONS, ALL_INIT_TEXT_SECTIONS
+#define ALL_EXIT_SECTIONS ALL_EXIT_DATA_SECTIONS, ALL_EXIT_TEXT_SECTIONS
+
+#define DATA_SECTIONS ".data$", ".data.rel$"
+#define TEXT_SECTIONS ".text$"
+
+#define INIT_SECTIONS      ".init.data$", ".init.text$"
+#define DEV_INIT_SECTIONS  ".devinit.data$", ".devinit.text$"
+#define CPU_INIT_SECTIONS  ".cpuinit.data$", ".cpuinit.text$"
+#define MEM_INIT_SECTIONS  ".meminit.data$", ".meminit.text$"
+
+#define EXIT_SECTIONS      ".exit.data$", ".exit.text$"
+#define DEV_EXIT_SECTIONS  ".devexit.data$", ".devexit.text$"
+#define CPU_EXIT_SECTIONS  ".cpuexit.data$", ".cpuexit.text$"
+#define MEM_EXIT_SECTIONS  ".memexit.data$", ".memexit.text$"
+
+/* init data sections */
+static const char *init_data_sections[] = { ALL_INIT_DATA_SECTIONS, NULL };
+
+/* all init sections */
+static const char *init_sections[] = { ALL_INIT_SECTIONS, NULL };
+
+/* All init and exit sections (code + data) */
+static const char *init_exit_sections[] =
+        {ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL };
+
+/* data section */
+static const char *data_sections[] = { DATA_SECTIONS, NULL };
+
+/* sections that may refer to an init/exit section with no warning */
+static const char *initref_sections[] =
+{
+        ".text.init.refok*",
+        ".exit.text.refok*",
+        ".data.init.refok*",
+        NULL
+};
+
+
+/* symbols in .data that may refer to init/exit sections */
+static const char *symbol_white_list[] =
+{
+        "*driver",
+        "*_template", /* scsi uses *_template a lot */
+        "*_timer",    /* arm uses ops structures named _timer a lot */
+        "*_sht",      /* scsi also used *_sht to some extent */
+        "*_ops",
+        "*_probe",
+        "*_probe_one",
+        "*_console",
+        NULL
+};
+
+static const char *head_sections[] = { ".head.text*", NULL };
+static const char *linker_symbols[] =
+        { "__init_begin", "_sinittext", "_einittext", NULL };
+
+enum mismatch {
+        NO_MISMATCH,
+        TEXT_TO_INIT,
+        DATA_TO_INIT,
+        TEXT_TO_EXIT,
+        DATA_TO_EXIT,
+        XXXINIT_TO_INIT,
+        XXXEXIT_TO_EXIT,
+        INIT_TO_EXIT,
+        EXIT_TO_INIT,
+        EXPORT_TO_INIT_EXIT,
+};
+
+struct sectioncheck {
+        const char *fromsec[20];
+        const char *tosec[20];
+        enum mismatch mismatch;
+};
+
+const struct sectioncheck sectioncheck[] = {
+/* Do not reference init/exit code/data from
+ * normal code and data
  */
-static int data_section(const char *name)
 {
-        if ((strcmp(name, ".data") == 0) ||
-            (strcmp(name, ".data.rel") == 0) ||
-            (strncmp(name, ".data.rel.", strlen(".data.rel.")) == 0))
-                return 1;
-        else
-                return 0;
+        .fromsec = { TEXT_SECTIONS, NULL },
+        .tosec   = { ALL_INIT_SECTIONS, NULL },
+        .mismatch = TEXT_TO_INIT,
+},
+{
+        .fromsec = { DATA_SECTIONS, NULL },
+        .tosec   = { ALL_INIT_SECTIONS, NULL },
+        .mismatch = DATA_TO_INIT,
+},
+{
+        .fromsec = { TEXT_SECTIONS, NULL },
+        .tosec   = { ALL_EXIT_SECTIONS, NULL },
+        .mismatch = TEXT_TO_EXIT,
+},
+{
+        .fromsec = { DATA_SECTIONS, NULL },
+        .tosec   = { ALL_EXIT_SECTIONS, NULL },
+        .mismatch = DATA_TO_EXIT,
+},
+/* Do not reference init code/data from devinit/cpuinit/meminit code/data */
+{
+        .fromsec = { DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, MEM_INIT_SECTIONS, NULL },
+        .tosec   = { INIT_SECTIONS, NULL },
+        .mismatch = XXXINIT_TO_INIT,
+},
+/* Do not reference exit code/data from devexit/cpuexit/memexit code/data */
+{
+        .fromsec = { DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS, NULL },
+        .tosec   = { EXIT_SECTIONS, NULL },
+        .mismatch = XXXEXIT_TO_EXIT,
+},
+/* Do not use exit code/data from init code */
+{
+        .fromsec = { ALL_INIT_SECTIONS, NULL },
+        .tosec   = { ALL_EXIT_SECTIONS, NULL },
+        .mismatch = INIT_TO_EXIT,
+},
+/* Do not use init code/data from exit code */
+{
+        .fromsec = { ALL_EXIT_SECTIONS, NULL },
+        .tosec   = { ALL_INIT_SECTIONS, NULL },
+        .mismatch = EXIT_TO_INIT,
+},
+/* Do not export init/exit functions or data */
+{
+        .fromsec = { "__ksymtab*", NULL },
+        .tosec   = { ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL },
+        .mismatch = EXPORT_TO_INIT_EXIT
+}
+};
+
+static int section_mismatch(const char *fromsec, const char *tosec)
+{
+        int i;
+        int elems = sizeof(sectioncheck) / sizeof(struct sectioncheck);
+        const struct sectioncheck *check = &sectioncheck[0];
+
+        for (i = 0; i < elems; i++) {
+                if (match(fromsec, check->fromsec) &&
+                    match(tosec, check->tosec))
+                        return check->mismatch;
+                check++;
+        }
+        return NO_MISMATCH;
 }
 
 /**
@@ -669,7 +916,8 @@ static int data_section(const char *name)
  *   the pattern is identified by:
  *   tosec   = init or exit section
  *   fromsec = data section
- *   atsym = *driver, *_template, *_sht, *_ops, *_probe, *probe_one, *_console, *_timer
+ *   atsym = *driver, *_template, *_sht, *_ops, *_probe,
+ *           *probe_one, *_console, *_timer
  *
  * Pattern 3:
  *   Whitelist all refereces from .text.head to .init.data
@@ -684,77 +932,36 @@ static int data_section(const char *name)
  *   This pattern is identified by
  *   refsymname = __init_begin, _sinittext, _einittext
  *
- * Pattern 5:
- *   Xtensa uses literal sections for constants that are accessed PC-relative.
- *   Literal sections may safely reference their text sections.
- *   (Note that the name for the literal section omits any trailing '.text')
- *   tosec = <section>[.text]
- *   fromsec = <section>.literal
  **/
-static int secref_whitelist(const char *modname, const char *tosec,
-                            const char *fromsec, const char *atsym,
-                            const char *refsymname)
+static int secref_whitelist(const char *fromsec, const char *fromsym,
+                            const char *tosec, const char *tosym)
 {
-        int len;
-        const char **s;
-        const char *pat2sym[] = {
-                "driver",
-                "_template", /* scsi uses *_template a lot */
-                "_timer",    /* arm uses ops structures named _timer a lot */
-                "_sht",      /* scsi also used *_sht to some extent */
-                "_ops",
-                "_probe",
-                "_probe_one",
-                "_console",
-                NULL
-        };
-
-        const char *pat3refsym[] = {
-                "__init_begin",
-                "_sinittext",
-                "_einittext",
-                NULL
-        };
-
         /* Check for pattern 0 */
-        if ((strncmp(fromsec, ".text.init.refok", strlen(".text.init.refok")) == 0) ||
-            (strncmp(fromsec, ".exit.text.refok", strlen(".exit.text.refok")) == 0) ||
-            (strncmp(fromsec, ".data.init.refok", strlen(".data.init.refok")) == 0))
-                return 1;
+        if (match(fromsec, initref_sections))
+                return 0;
 
         /* Check for pattern 1 */
-        if ((strcmp(tosec, ".init.data") == 0) &&
-            (strncmp(fromsec, ".data", strlen(".data")) == 0) &&
-            (strncmp(atsym, "__param", strlen("__param")) == 0))
-                return 1;
+        if (match(tosec, init_data_sections) &&
+            match(fromsec, data_sections) &&
+            (strncmp(fromsym, "__param", strlen("__param")) == 0))
+                return 0;
 
         /* Check for pattern 2 */
-        if ((init_section(tosec) || exit_section(tosec)) && data_section(fromsec))
-                for (s = pat2sym; *s; s++)
-                        if (strrcmp(atsym, *s) == 0)
-                                return 1;
+        if (match(tosec, init_exit_sections) &&
+            match(fromsec, data_sections) &&
+            match(fromsym, symbol_white_list))
+                return 0;
 
         /* Check for pattern 3 */
-        if ((strcmp(fromsec, ".text.head") == 0) &&
-                ((strcmp(tosec, ".init.data") == 0) ||
-                (strcmp(tosec, ".init.text") == 0)))
-        return 1;
+        if (match(fromsec, head_sections) &&
+            match(tosec, init_sections))
+                return 0;
 
         /* Check for pattern 4 */
-        for (s = pat3refsym; *s; s++)
-                if (strcmp(refsymname, *s) == 0)
-                        return 1;
-
-        /* Check for pattern 5 */
-        if (strrcmp(tosec, ".text") == 0)
-                len = strlen(tosec) - strlen(".text");
-        else
-                len = strlen(tosec);
-        if ((strncmp(tosec, fromsec, len) == 0) && (strlen(fromsec) > len) &&
-            (strcmp(fromsec + len, ".literal") == 0))
-                return 1;
+        if (match(tosym, linker_symbols))
+                return 0;
 
-        return 0;
+        return 1;
 }
 
 /**
@@ -764,10 +971,13 @@ static int secref_whitelist(const char *modname, const char *tosec,
  * In other cases the symbol needs to be looked up in the symbol table
  * based on section and address.
  *  **/
-static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf_Addr addr,
+static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr,
                                 Elf_Sym *relsym)
 {
         Elf_Sym *sym;
+        Elf_Sym *near = NULL;
+        Elf64_Sword distance = 20;
+        Elf64_Sword d;
 
         if (relsym->st_name != 0)
                 return relsym;
@@ -778,8 +988,20 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf_Addr addr,
                         continue;
                 if (sym->st_value == addr)
                         return sym;
+                /* Find a symbol nearby - addr are maybe negative */
+                d = sym->st_value - addr;
+                if (d < 0)
+                        d = addr - sym->st_value;
+                if (d < distance) {
+                        distance = d;
+                        near = sym;
+                }
         }
-        return NULL;
+        /* We need a close match */
+        if (distance < 20)
+                return near;
+        else
+                return NULL;
 }
 
 static inline int is_arm_mapping_symbol(const char *str)
@@ -812,121 +1034,245 @@ static inline int is_valid_name(struct elf_info *elf, Elf_Sym *sym)
  * The ELF format may have a better way to detect what type of symbol
  * it is, but this works for now.
  **/
-static void find_symbols_between(struct elf_info *elf, Elf_Addr addr,
-                                 const char *sec,
-                                 Elf_Sym **before, Elf_Sym **after)
+static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr,
+                                 const char *sec)
 {
         Elf_Sym *sym;
-        Elf_Ehdr *hdr = elf->hdr;
-        Elf_Addr beforediff = ~0;
-        Elf_Addr afterdiff = ~0;
-        const char *secstrings = (void *)hdr +
-                                 elf->sechdrs[hdr->e_shstrndx].sh_offset;
-
-        *before = NULL;
-        *after = NULL;
+        Elf_Sym *near = NULL;
+        Elf_Addr distance = ~0;
 
         for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
                 const char *symsec;
 
                 if (sym->st_shndx >= SHN_LORESERVE)
                         continue;
-                symsec = secstrings + elf->sechdrs[sym->st_shndx].sh_name;
+                symsec = sec_name(elf, sym->st_shndx);
                 if (strcmp(symsec, sec) != 0)
                         continue;
                 if (!is_valid_name(elf, sym))
                         continue;
                 if (sym->st_value <= addr) {
-                        if ((addr - sym->st_value) < beforediff) {
-                                beforediff = addr - sym->st_value;
-                                *before = sym;
-                        }
-                        else if ((addr - sym->st_value) == beforediff) {
-                                *before = sym;
+                        if ((addr - sym->st_value) < distance) {
+                                distance = addr - sym->st_value;
+                                near = sym;
+                        } else if ((addr - sym->st_value) == distance) {
+                                near = sym;
                         }
                 }
+        }
+        return near;
+}
+
+/*
+ * Convert a section name to the function/data attribute
+ * .init.text => __init
+ * .cpuinit.data => __cpudata
+ * .memexitconst => __memconst
+ * etc.
+*/
+static char *sec2annotation(const char *s)
+{
+        if (match(s, init_exit_sections)) {
+                char *p = malloc(20);
+                char *r = p;
+
+                *p++ = '_';
+                *p++ = '_';
+                if (*s == '.')
+                        s++;
+                while (*s && *s != '.')
+                        *p++ = *s++;
+                *p = '\0';
+                if (*s == '.')
+                        s++;
+                if (strstr(s, "rodata") != NULL)
+                        strcat(p, "const ");
+                else if (strstr(s, "data") != NULL)
+                        strcat(p, "data ");
                 else
-                {
-                        if ((sym->st_value - addr) < afterdiff) {
-                                afterdiff = sym->st_value - addr;
-                                *after = sym;
-                        }
-                        else if ((sym->st_value - addr) == afterdiff) {
-                                *after = sym;
-                        }
-                }
+                        strcat(p, " ");
+                return r; /* we leak her but we do not care */
+        } else {
+                return "";
         }
 }
 
-/**
+static int is_function(Elf_Sym *sym)
+{
+        if (sym)
+                return ELF_ST_TYPE(sym->st_info) == STT_FUNC;
+        else
+                return 0;
+}
+
+/*
  * Print a warning about a section mismatch.
  * Try to find symbols near it so user can find it.
  * Check whitelist before warning - it may be a false positive.
- **/
-static void warn_sec_mismatch(const char *modname, const char *fromsec,
-                              struct elf_info *elf, Elf_Sym *sym, Elf_Rela r)
+ */
+static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
+                                const char *fromsec,
+                                unsigned long long fromaddr,
+                                const char *fromsym,
+                                int from_is_func,
+                                const char *tosec, const char *tosym,
+                                int to_is_func)
 {
-        const char *refsymname = "";
-        Elf_Sym *before, *after;
-        Elf_Sym *refsym;
-        Elf_Ehdr *hdr = elf->hdr;
-        Elf_Shdr *sechdrs = elf->sechdrs;
-        const char *secstrings = (void *)hdr +
-                                 sechdrs[hdr->e_shstrndx].sh_offset;
-        const char *secname = secstrings + sechdrs[sym->st_shndx].sh_name;
-
-        find_symbols_between(elf, r.r_offset, fromsec, &before, &after);
-
-        refsym = find_elf_symbol(elf, r.r_addend, sym);
-        if (refsym && strlen(elf->strtab + refsym->st_name))
-                refsymname = elf->strtab + refsym->st_name;
-
-        /* check whitelist - we may ignore it */
-        if (secref_whitelist(modname, secname, fromsec,
-                             before ? elf->strtab + before->st_name : "",
-                             refsymname))
+        const char *from, *from_p;
+        const char *to, *to_p;
+        from = from_is_func ? "function" : "variable";
+        from_p = from_is_func ? "()" : "";
+        to = to_is_func ? "function" : "variable";
+        to_p = to_is_func ? "()" : "";
+
+        fprintf(stderr, "WARNING: %s(%s+0x%llx): Section mismatch in"
+                        " reference from the %s %s%s to the %s %s:%s%s\n",
+                        modname, fromsec, fromaddr, from, fromsym, from_p,
+                        to, tosec, tosym, to_p);
+
+        sec_mismatch_count++;
+        if (!sec_mismatch_verbose)
                 return;
 
-        if (before && after) {
-                warn("%s(%s+0x%llx): Section mismatch: reference to %s:%s "
-                     "(between '%s' and '%s')\n",
-                     modname, fromsec, (unsigned long long)r.r_offset,
-                     secname, refsymname,
-                     elf->strtab + before->st_name,
-                     elf->strtab + after->st_name);
-        } else if (before) {
-                warn("%s(%s+0x%llx): Section mismatch: reference to %s:%s "
-                     "(after '%s')\n",
-                     modname, fromsec, (unsigned long long)r.r_offset,
-                     secname, refsymname,
-                     elf->strtab + before->st_name);
-        } else if (after) {
-                warn("%s(%s+0x%llx): Section mismatch: reference to %s:%s "
-                     "before '%s' (at offset -0x%llx)\n",
-                     modname, fromsec, (unsigned long long)r.r_offset,
-                     secname, refsymname,
-                     elf->strtab + after->st_name);
-        } else {
-                warn("%s(%s+0x%llx): Section mismatch: reference to %s:%s\n",
-                     modname, fromsec, (unsigned long long)r.r_offset,
-                     secname, refsymname);
+        switch (mismatch) {
+        case TEXT_TO_INIT:
+                fprintf(stderr,
+                "The function %s %s() references\n"
+                "the %s %s%s%s.\n"
+                "This is often because %s lacks a %s\n"
+                "annotation or the annotation of %s is wrong.\n",
+                sec2annotation(fromsec), fromsym,
+                to, sec2annotation(tosec), tosym, to_p,
+                fromsym, sec2annotation(tosec), tosym);
+                break;
+        case DATA_TO_INIT: {
+                const char **s = symbol_white_list;
+                fprintf(stderr,
+                "The variable %s references\n"
+                "the %s %s%s%s\n"
+                "If the reference is valid then annotate the\n"
+                "variable with __init* (see linux/init.h) "
+                "or name the variable:\n",
+                fromsym, to, sec2annotation(tosec), tosym, to_p);
+                while (*s)
+                        fprintf(stderr, "%s, ", *s++);
+                fprintf(stderr, "\n");
+                break;
+        }
+        case TEXT_TO_EXIT:
+                fprintf(stderr,
+                "The function %s() references a %s in an exit section.\n"
+                "Often the %s %s%s has valid usage outside the exit section\n"
+                "and the fix is to remove the %sannotation of %s.\n",
+                fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym);
+                break;
+        case DATA_TO_EXIT: {
+                const char **s = symbol_white_list;
+                fprintf(stderr,
+                "The variable %s references\n"
+                "the %s %s%s%s\n"
+                "If the reference is valid then annotate the\n"
+                "variable with __exit* (see linux/init.h) or "
+                "name the variable:\n",
+                fromsym, to, sec2annotation(tosec), tosym, to_p);
+                while (*s)
+                        fprintf(stderr, "%s, ", *s++);
+                fprintf(stderr, "\n");
+                break;
+        }
+        case XXXINIT_TO_INIT:
+        case XXXEXIT_TO_EXIT:
+                fprintf(stderr,
+                "The %s %s%s%s references\n"
+                "a %s %s%s%s.\n"
+                "If %s is only used by %s then\n"
+                "annotate %s with a matching annotation.\n",
+                from, sec2annotation(fromsec), fromsym, from_p,
+                to, sec2annotation(tosec), tosym, to_p,
+                fromsym, tosym, fromsym);
+                break;
+        case INIT_TO_EXIT:
+                fprintf(stderr,
+                "The %s %s%s%s references\n"
+                "a %s %s%s%s.\n"
+                "This is often seen when error handling "
+                "in the init function\n"
+                "uses functionality in the exit path.\n"
+                "The fix is often to remove the %sannotation of\n"
+                "%s%s so it may be used outside an exit section.\n",
+                from, sec2annotation(fromsec), fromsym, from_p,
+                to, sec2annotation(tosec), tosym, to_p,
+                sec2annotation(tosec), tosym, to_p);
+                break;
+        case EXIT_TO_INIT:
+                fprintf(stderr,
+                "The %s %s%s%s references\n"
+                "a %s %s%s%s.\n"
+                "This is often seen when error handling "
+                "in the exit function\n"
+                "uses functionality in the init path.\n"
+                "The fix is often to remove the %sannotation of\n"
+                "%s%s so it may be used outside an init section.\n",
+                from, sec2annotation(fromsec), fromsym, from_p,
+                to, sec2annotation(tosec), tosym, to_p,
+                sec2annotation(tosec), tosym, to_p);
+                break;
+        case EXPORT_TO_INIT_EXIT:
+                fprintf(stderr,
+                "The symbol %s is exported and annotated %s\n"
+                "Fix this by removing the %sannotation of %s "
+                "or drop the export.\n",
+                tosym, sec2annotation(tosec), sec2annotation(tosec), tosym);
+        case NO_MISMATCH:
+                /* To get warnings on missing members */
+                break;
+        }
+        fprintf(stderr, "\n");
+}
+
+static void check_section_mismatch(const char *modname, struct elf_info *elf,
+                                   Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
+{
+        const char *tosec;
+        enum mismatch mismatch;
+
+        tosec = sec_name(elf, sym->st_shndx);
+        mismatch = section_mismatch(fromsec, tosec);
+        if (mismatch != NO_MISMATCH) {
+                Elf_Sym *to;
+                Elf_Sym *from;
+                const char *tosym;
+                const char *fromsym;
+
+                from = find_elf_symbol2(elf, r->r_offset, fromsec);
+                fromsym = sym_name(elf, from);
+                to = find_elf_symbol(elf, r->r_addend, sym);
+                tosym = sym_name(elf, to);
+
+                /* check whitelist - we may ignore it */
+                if (secref_whitelist(fromsec, fromsym, tosec, tosym)) {
+                        report_sec_mismatch(modname, mismatch,
+                           fromsec, r->r_offset, fromsym,
+                           is_function(from), tosec, tosym,
+                           is_function(to));
+                }
         }
 }
 
 static unsigned int *reloc_location(struct elf_info *elf,
-                                           int rsection, Elf_Rela *r)
+                                    Elf_Shdr *sechdr, Elf_Rela *r)
 {
         Elf_Shdr *sechdrs = elf->sechdrs;
-        int section = sechdrs[rsection].sh_info;
+        int section = sechdr->sh_info;
 
         return (void *)elf->hdr + sechdrs[section].sh_offset +
                 (r->r_offset - sechdrs[section].sh_addr);
 }
 
-static int addend_386_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
+static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 {
         unsigned int r_typ = ELF_R_TYPE(r->r_info);
-        unsigned int *location = reloc_location(elf, rsection, r);
+        unsigned int *location = reloc_location(elf, sechdr, r);
 
         switch (r_typ) {
         case R_386_32:
@@ -942,19 +1288,21 @@ static int addend_386_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
         return 0;
 }
 
-static int addend_arm_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
+static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 {
         unsigned int r_typ = ELF_R_TYPE(r->r_info);
 
         switch (r_typ) {
         case R_ARM_ABS32:
                 /* From ARM ABI: (S + A) | T */
-                r->r_addend = (int)(long)(elf->symtab_start + ELF_R_SYM(r->r_info));
+                r->r_addend = (int)(long)
+                              (elf->symtab_start + ELF_R_SYM(r->r_info));
                 break;
         case R_ARM_PC24:
                 /* From ARM ABI: ((S + A) | T) - P */
-                r->r_addend = (int)(long)(elf->hdr + elf->sechdrs[rsection].sh_offset +
-                                          (r->r_offset - elf->sechdrs[rsection].sh_addr));
+                r->r_addend = (int)(long)(elf->hdr +
+                              sechdr->sh_offset +
+                              (r->r_offset - sechdr->sh_addr));
                 break;
         default:
                 return 1;
@@ -962,10 +1310,10 @@ static int addend_arm_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
         return 0;
 }
 
-static int addend_mips_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
+static int addend_mips_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 {
         unsigned int r_typ = ELF_R_TYPE(r->r_info);
-        unsigned int *location = reloc_location(elf, rsection, r);
+        unsigned int *location = reloc_location(elf, sechdr, r);
         unsigned int inst;
 
         if (r_typ == R_MIPS_HI16)
@@ -985,6 +1333,108 @@ static int addend_mips_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
         return 0;
 }
 
+static void section_rela(const char *modname, struct elf_info *elf,
+                         Elf_Shdr *sechdr)
+{
+        Elf_Sym  *sym;
+        Elf_Rela *rela;
+        Elf_Rela r;
+        unsigned int r_sym;
+        const char *fromsec;
+
+        Elf_Rela *start = (void *)elf->hdr + sechdr->sh_offset;
+        Elf_Rela *stop  = (void *)start + sechdr->sh_size;
+
+        fromsec = sech_name(elf, sechdr);
+        fromsec += strlen(".rela");
+        /* if from section (name) is know good then skip it */
+        if (check_section(modname, fromsec))
+                return;
+
+        for (rela = start; rela < stop; rela++) {
+                r.r_offset = TO_NATIVE(rela->r_offset);
+#if KERNEL_ELFCLASS == ELFCLASS64
+                if (elf->hdr->e_machine == EM_MIPS) {
+                        unsigned int r_typ;
+                        r_sym = ELF64_MIPS_R_SYM(rela->r_info);
+                        r_sym = TO_NATIVE(r_sym);
+                        r_typ = ELF64_MIPS_R_TYPE(rela->r_info);
+                        r.r_info = ELF64_R_INFO(r_sym, r_typ);
+                } else {
+                        r.r_info = TO_NATIVE(rela->r_info);
+                        r_sym = ELF_R_SYM(r.r_info);
+                }
+#else
+                r.r_info = TO_NATIVE(rela->r_info);
+                r_sym = ELF_R_SYM(r.r_info);
+#endif
+                r.r_addend = TO_NATIVE(rela->r_addend);
+                sym = elf->symtab_start + r_sym;
+                /* Skip special sections */
+                if (sym->st_shndx >= SHN_LORESERVE)
+                        continue;
+                check_section_mismatch(modname, elf, &r, sym, fromsec);
+        }
+}
+
+static void section_rel(const char *modname, struct elf_info *elf,
+                        Elf_Shdr *sechdr)
+{
+        Elf_Sym *sym;
+        Elf_Rel *rel;
+        Elf_Rela r;
+        unsigned int r_sym;
+        const char *fromsec;
+
+        Elf_Rel *start = (void *)elf->hdr + sechdr->sh_offset;
+        Elf_Rel *stop  = (void *)start + sechdr->sh_size;
+
+        fromsec = sech_name(elf, sechdr);
+        fromsec += strlen(".rel");
+        /* if from section (name) is know good then skip it */
+        if (check_section(modname, fromsec))
+                return;
+
+        for (rel = start; rel < stop; rel++) {
+                r.r_offset = TO_NATIVE(rel->r_offset);
+#if KERNEL_ELFCLASS == ELFCLASS64
+                if (elf->hdr->e_machine == EM_MIPS) {
+                        unsigned int r_typ;
+                        r_sym = ELF64_MIPS_R_SYM(rel->r_info);
+                        r_sym = TO_NATIVE(r_sym);
+                        r_typ = ELF64_MIPS_R_TYPE(rel->r_info);
+                        r.r_info = ELF64_R_INFO(r_sym, r_typ);
+                } else {
+                        r.r_info = TO_NATIVE(rel->r_info);
+                        r_sym = ELF_R_SYM(r.r_info);
+                }
+#else
+                r.r_info = TO_NATIVE(rel->r_info);
+                r_sym = ELF_R_SYM(r.r_info);
+#endif
+                r.r_addend = 0;
+                switch (elf->hdr->e_machine) {
+                case EM_386:
+                        if (addend_386_rel(elf, sechdr, &r))
+                                continue;
+                        break;
+                case EM_ARM:
+                        if (addend_arm_rel(elf, sechdr, &r))
+                                continue;
+                        break;
+                case EM_MIPS:
+                        if (addend_mips_rel(elf, sechdr, &r))
+                                continue;
+                        break;
+                }
+                sym = elf->symtab_start + r_sym;
+                /* Skip special sections */
+                if (sym->st_shndx >= SHN_LORESERVE)
+                        continue;
+                check_section_mismatch(modname, elf, &r, sym, fromsec);
+        }
+}
+
 /**
  * A module includes a number of sections that are discarded
  * either when loaded or when used as built-in.
@@ -998,257 +1448,21 @@ static int addend_mips_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
  * be discarded and warns about it.
  **/
 static void check_sec_ref(struct module *mod, const char *modname,
-                          struct elf_info *elf,
-                          int section(const char*),
-                          int section_ref_ok(const char *))
+                          struct elf_info *elf)
 {
         int i;
-        Elf_Sym  *sym;
-        Elf_Ehdr *hdr = elf->hdr;
         Elf_Shdr *sechdrs = elf->sechdrs;
-        const char *secstrings = (void *)hdr +
-                                 sechdrs[hdr->e_shstrndx].sh_offset;
 
         /* Walk through all sections */
-        for (i = 0; i < hdr->e_shnum; i++) {
-                const char *name = secstrings + sechdrs[i].sh_name;
-                const char *secname;
-                Elf_Rela r;
-                unsigned int r_sym;
+        for (i = 0; i < elf->hdr->e_shnum; i++) {
                 /* We want to process only relocation sections and not .init */
-                if (sechdrs[i].sh_type == SHT_RELA) {
-                        Elf_Rela *rela;
-                        Elf_Rela *start = (void *)hdr + sechdrs[i].sh_offset;
-                        Elf_Rela *stop  = (void*)start + sechdrs[i].sh_size;
-                        name += strlen(".rela");
-                        if (section_ref_ok(name))
-                                continue;
-
-                        for (rela = start; rela < stop; rela++) {
-                                r.r_offset = TO_NATIVE(rela->r_offset);
-#if KERNEL_ELFCLASS == ELFCLASS64
-                                if (hdr->e_machine == EM_MIPS) {
-                                        unsigned int r_typ;
-                                        r_sym = ELF64_MIPS_R_SYM(rela->r_info);
-                                        r_sym = TO_NATIVE(r_sym);
-                                        r_typ = ELF64_MIPS_R_TYPE(rela->r_info);
-                                        r.r_info = ELF64_R_INFO(r_sym, r_typ);
-                                } else {
-                                        r.r_info = TO_NATIVE(rela->r_info);
-                                        r_sym = ELF_R_SYM(r.r_info);
-                                }
-#else
-                                r.r_info = TO_NATIVE(rela->r_info);
-                                r_sym = ELF_R_SYM(r.r_info);
-#endif
-                                r.r_addend = TO_NATIVE(rela->r_addend);
-                                sym = elf->symtab_start + r_sym;
-                                /* Skip special sections */
-                                if (sym->st_shndx >= SHN_LORESERVE)
-                                        continue;
-
-                                secname = secstrings +
-                                        sechdrs[sym->st_shndx].sh_name;
-                                if (section(secname))
-                                        warn_sec_mismatch(modname, name,
-                                                          elf, sym, r);
-                        }
-                } else if (sechdrs[i].sh_type == SHT_REL) {
-                        Elf_Rel *rel;
-                        Elf_Rel *start = (void *)hdr + sechdrs[i].sh_offset;
-                        Elf_Rel *stop  = (void*)start + sechdrs[i].sh_size;
-                        name += strlen(".rel");
-                        if (section_ref_ok(name))
-                                continue;
-
-                        for (rel = start; rel < stop; rel++) {
-                                r.r_offset = TO_NATIVE(rel->r_offset);
-#if KERNEL_ELFCLASS == ELFCLASS64
-                                if (hdr->e_machine == EM_MIPS) {
-                                        unsigned int r_typ;
-                                        r_sym = ELF64_MIPS_R_SYM(rel->r_info);
-                                        r_sym = TO_NATIVE(r_sym);
-                                        r_typ = ELF64_MIPS_R_TYPE(rel->r_info);
-                                        r.r_info = ELF64_R_INFO(r_sym, r_typ);
-                                } else {
-                                        r.r_info = TO_NATIVE(rel->r_info);
-                                        r_sym = ELF_R_SYM(r.r_info);
-                                }
-#else
-                                r.r_info = TO_NATIVE(rel->r_info);
-                                r_sym = ELF_R_SYM(r.r_info);
-#endif
-                                r.r_addend = 0;
-                                switch (hdr->e_machine) {
-                                case EM_386:
-                                        if (addend_386_rel(elf, i, &r))
-                                                continue;
-                                        break;
-                                case EM_ARM:
-                                        if(addend_arm_rel(elf, i, &r))
-                                                continue;
-                                        break;
-                                case EM_MIPS:
-                                        if (addend_mips_rel(elf, i, &r))
-                                                continue;
-                                        break;
-                                }
-                                sym = elf->symtab_start + r_sym;
-                                /* Skip special sections */
-                                if (sym->st_shndx >= SHN_LORESERVE)
-                                        continue;
-
-                                secname = secstrings +
-                                        sechdrs[sym->st_shndx].sh_name;
-                                if (section(secname))
-                                        warn_sec_mismatch(modname, name,
-                                                          elf, sym, r);
-                        }
-                }
+                if (sechdrs[i].sh_type == SHT_RELA)
+                        section_rela(modname, elf, &elf->sechdrs[i]);
+                else if (sechdrs[i].sh_type == SHT_REL)
+                        section_rel(modname, elf, &elf->sechdrs[i]);
         }
 }
 
-/*
- * Identify sections from which references to either a
- * .init or a .exit section is OK.
- *
- * [OPD] Keith Ownes <kaos@sgi.com> commented:
- * For our future {in}sanity, add a comment that this is the ppc .opd
- * section, not the ia64 .opd section.
- * ia64 .opd should not point to discarded sections.
- * [.rodata] like for .init.text we ignore .rodata references -same reason
- */
-static int initexit_section_ref_ok(const char *name)
-{
-        const char **s;
-        /* Absolute section names */
-        const char *namelist1[] = {
-                "__bug_table",          /* used by powerpc for BUG() */
-                "__ex_table",
-                ".altinstructions",
-                ".cranges",             /* used by sh64 */
-                ".fixup",
-                ".machvec",             /* ia64 + powerpc uses these */
-                ".machine.desc",
-                ".opd",                 /* See comment [OPD] */
-                "__dbe_table",
-                ".parainstructions",
-                ".pdr",
-                ".plt",                 /* seen on ARCH=um build on x86_64. Harmless */
-                ".smp_locks",
-                ".stab",
-                ".m68k_fixup",
-                ".xt.prop",             /* xtensa informational section */
-                ".xt.lit",              /* xtensa informational section */
-                NULL
-        };
-        /* Start of section names */
-        const char *namelist2[] = {
-                ".debug",
-                ".eh_frame",
-                ".note",                /* ignore ELF notes - may contain anything */
-                ".got",                 /* powerpc - global offset table */
-                ".toc",                 /* powerpc - table of contents */
-                NULL
-        };
-        /* part of section name */
-        const char *namelist3 [] = {
-                ".unwind",  /* Sample: IA_64.unwind.exit.text */
-                NULL
-        };
-
-        for (s = namelist1; *s; s++)
-                if (strcmp(*s, name) == 0)
-                        return 1;
-        for (s = namelist2; *s; s++)
-                if (strncmp(*s, name, strlen(*s)) == 0)
-                        return 1;
-        for (s = namelist3; *s; s++)
-                if (strstr(name, *s) != NULL)
-                        return 1;
-        return 0;
-}
-
-
-/*
- * Identify sections from which references to a .init section is OK.
- *
- * Unfortunately references to read only data that referenced .init
- * sections had to be excluded. Almost all of these are false
- * positives, they are created by gcc. The downside of excluding rodata
- * is that there really are some user references from rodata to
- * init code, e.g. drivers/video/vgacon.c:
- *
- * const struct consw vga_con = {
- *        con_startup:            vgacon_startup,
- *
- * where vgacon_startup is __init.  If you want to wade through the false
- * positives, take out the check for rodata.
- */
-static int init_section_ref_ok(const char *name)
-{
-        const char **s;
-        /* Absolute section names */
-        const char *namelist1[] = {
-                "__dbe_table",          /* MIPS generate these */
-                "__ftr_fixup",          /* powerpc cpu feature fixup */
-                "__fw_ftr_fixup",       /* powerpc firmware feature fixup */
-                "__param",
-                ".data.rel.ro",         /* used by parisc64 */
-                ".init",
-                ".text.lock",
-                NULL
-        };
-        /* Start of section names */
-        const char *namelist2[] = {
-                ".init.",
-                ".pci_fixup",
-                ".rodata",
-                NULL
-        };
-
-        if (initexit_section_ref_ok(name))
-                return 1;
-
-        for (s = namelist1; *s; s++)
-                if (strcmp(*s, name) == 0)
-                        return 1;
-        for (s = namelist2; *s; s++)
-                if (strncmp(*s, name, strlen(*s)) == 0)
-                        return 1;
-
-        /* If section name ends with ".init" we allow references
-         * as is the case with .initcallN.init, .early_param.init, .taglist.init etc
-         */
-        if (strrcmp(name, ".init") == 0)
-                return 1;
-        return 0;
-}
-
-/*
- * Identify sections from which references to a .exit section is OK.
- */
-static int exit_section_ref_ok(const char *name)
-{
-        const char **s;
-        /* Absolute section names */
-        const char *namelist1[] = {
-                ".exit.data",
-                ".exit.text",
-                ".exitcall.exit",
-                ".rodata",
-                NULL
-        };
-
-        if (initexit_section_ref_ok(name))
-                return 1;
-
-        for (s = namelist1; *s; s++)
-                if (strcmp(*s, name) == 0)
-                        return 1;
-        return 0;
-}
-
 static void read_symbols(char *modname)
 {
         const char *symname;
@@ -1288,10 +1502,9 @@ static void read_symbols(char *modname)
                 handle_modversions(mod, &info, sym, symname);
                 handle_moddevtable(mod, &info, sym, symname);
         }
-        if (is_vmlinux(modname) && vmlinux_section_warnings) {
-                check_sec_ref(mod, modname, &info, init_section, init_section_ref_ok);
-                check_sec_ref(mod, modname, &info, exit_section, exit_section_ref_ok);
-        }
+        if (!is_vmlinux(modname) ||
+             (is_vmlinux(modname) && vmlinux_section_warnings))
+                check_sec_ref(mod, modname, &info);
 
         version = get_modinfo(info.modinfo, info.modinfo_len, "version");
         if (version)
@@ -1365,7 +1578,7 @@ static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
         }
 }
 
-static void check_for_unused(enum export exp, const char* m, const char* s)
+static void check_for_unused(enum export exp, const char *m, const char *s)
 {
         const char *e = is_vmlinux(m) ?"":".ko";
 
@@ -1398,7 +1611,7 @@ static void check_exports(struct module *mod)
                 if (!mod->gpl_compatible)
                         check_for_gpl_usage(exp->export, basename, exp->name);
                 check_for_unused(exp->export, basename, exp->name);
-        }
+        }
 }
 
 /**
@@ -1458,13 +1671,12 @@ static int add_versions(struct buffer *b, struct module *mod)
 
         buf_printf(b, "\n");
         buf_printf(b, "static const struct modversion_info ____versions[]\n");
-        buf_printf(b, "__attribute_used__\n");
+        buf_printf(b, "__used\n");
         buf_printf(b, "__attribute__((section(\"__versions\"))) = {\n");
 
         for (s = mod->unres; s; s = s->next) {
-                if (!s->module) {
+                if (!s->module)
                         continue;
-                }
                 if (!s->crc_valid) {
                         warn("\"%s\" [%s.ko] has no CRC!\n",
                                 s->name, mod->name);
@@ -1485,13 +1697,12 @@ static void add_depends(struct buffer *b, struct module *mod,
         struct module *m;
         int first = 1;
 
-        for (m = modules; m; m = m->next) {
+        for (m = modules; m; m = m->next)
                 m->seen = is_vmlinux(m->name);
-        }
 
         buf_printf(b, "\n");
         buf_printf(b, "static const char __module_depends[]\n");
-        buf_printf(b, "__attribute_used__\n");
+        buf_printf(b, "__used\n");
         buf_printf(b, "__attribute__((section(\".modinfo\"))) =\n");
         buf_printf(b, "\"depends=");
         for (s = mod->unres; s; s = s->next) {
@@ -1503,7 +1714,8 @@ static void add_depends(struct buffer *b, struct module *mod,
                         continue;
 
                 s->module->seen = 1;
-                if ((p = strrchr(s->module->name, '/')) != NULL)
+                p = strrchr(s->module->name, '/');
+                if (p)
                         p++;
                 else
                         p = s->module->name;
@@ -1575,7 +1787,7 @@ static void read_dump(const char *fname, unsigned int kernel)
         void *file = grab_file(fname, &size);
         char *line;
 
-        if (!file)
+        if (!file)
                 /* No symbol versions, silently ignore */
                 return;
 
@@ -1598,11 +1810,10 @@ static void read_dump(const char *fname, unsigned int kernel)
                 crc = strtoul(line, &d, 16);
                 if (*symname == '\0' || *modname == '\0' || *d != '\0')
                         goto fail;
-
-                if (!(mod = find_module(modname))) {
-                        if (is_vmlinux(modname)) {
+                mod = find_module(modname);
+                if (!mod) {
+                        if (is_vmlinux(modname))
                                 have_vmlinux = 1;
-                        }
                         mod = new_module(NOFAIL(strdup(modname)));
                         mod->skip = 1;
                 }
@@ -1653,38 +1864,40 @@ int main(int argc, char **argv)
 {
         struct module *mod;
         struct buffer buf = { };
-        char fname[SZ];
         char *kernel_read = NULL, *module_read = NULL;
         char *dump_write = NULL;
         int opt;
         int err;
 
-        while ((opt = getopt(argc, argv, "i:I:mso:aw")) != -1) {
-                switch(opt) {
-                        case 'i':
-                                kernel_read = optarg;
-                                break;
-                        case 'I':
-                                module_read = optarg;
-                                external_module = 1;
-                                break;
-                        case 'm':
-                                modversions = 1;
-                                break;
-                        case 'o':
-                                dump_write = optarg;
-                                break;
-                        case 'a':
-                                all_versions = 1;
-                                break;
-                        case 's':
-                                vmlinux_section_warnings = 0;
-                                break;
-                        case 'w':
-                                warn_unresolved = 1;
-                                break;
-                        default:
-                                exit(1);
+        while ((opt = getopt(argc, argv, "i:I:msSo:aw")) != -1) {
+                switch (opt) {
+                case 'i':
+                        kernel_read = optarg;
+                        break;
+                case 'I':
+                        module_read = optarg;
+                        external_module = 1;
+                        break;
+                case 'm':
+                        modversions = 1;
+                        break;
+                case 'o':
+                        dump_write = optarg;
+                        break;
+                case 'a':
+                        all_versions = 1;
+                        break;
+                case 's':
+                        vmlinux_section_warnings = 0;
+                        break;
+                case 'S':
+                        sec_mismatch_verbose = 0;
+                        break;
+                case 'w':
+                        warn_unresolved = 1;
+                        break;
+                default:
+                        exit(1);
                 }
         }
 
@@ -1693,9 +1906,8 @@ int main(int argc, char **argv)
         if (module_read)
                 read_dump(module_read, 0);
 
-        while (optind < argc) {
+        while (optind < argc)
                 read_symbols(argv[optind++]);
-        }
 
         for (mod = modules; mod; mod = mod->next) {
                 if (mod->skip)
@@ -1706,6 +1918,8 @@ int main(int argc, char **argv)
         err = 0;
 
         for (mod = modules; mod; mod = mod->next) {
+                char fname[strlen(mod->name) + 10];
+
                 if (mod->skip)
                         continue;
 
@@ -1723,6 +1937,12 @@ int main(int argc, char **argv)
 
         if (dump_write)
                 write_dump(dump_write);
+        if (sec_mismatch_count && !sec_mismatch_verbose)
+                fprintf(stderr, "modpost: Found %d section mismatch(es).\n"
+                        "To see additional details select \"Enable full "
+                        "Section mismatch analysis\"\n"
+                        "in the Kernel Hacking menu "
+                        "(CONFIG_SECTION_MISMATCH).\n", sec_mismatch_count);
 
         return err;
 }
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 0ffed17ec20c..999f15e0e008 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -17,6 +17,7 @@
 #define Elf_Shdr    Elf32_Shdr
 #define Elf_Sym     Elf32_Sym
 #define Elf_Addr    Elf32_Addr
+#define Elf_Sword   Elf64_Sword
 #define Elf_Section Elf32_Half
 #define ELF_ST_BIND ELF32_ST_BIND
 #define ELF_ST_TYPE ELF32_ST_TYPE
@@ -31,6 +32,7 @@
 #define Elf_Shdr    Elf64_Shdr
 #define Elf_Sym     Elf64_Sym
 #define Elf_Addr    Elf64_Addr
+#define Elf_Sword   Elf64_Sxword
 #define Elf_Section Elf64_Half
 #define ELF_ST_BIND ELF64_ST_BIND
 #define ELF_ST_TYPE ELF64_ST_TYPE
diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 7c434e037e7f..5e326078a4a2 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -89,9 +89,8 @@ clean-dirs += $(objtree)/tar-install/
 # Help text displayed when executing 'make help'
 # ---------------------------------------------------------------------------
 help: FORCE
-        @echo '  rpm-pkg         - Build the kernel as an RPM package'
-        @echo '  binrpm-pkg      - Build an rpm package containing the compiled kernel'
-        @echo '                    and modules'
+        @echo '  rpm-pkg         - Build both source and binary RPM kernel packages'
+        @echo '  binrpm-pkg      - Build only the binary kernel package'
         @echo '  deb-pkg         - Build the kernel as an deb package'
         @echo '  tar-pkg         - Build the kernel as an uncompressed tarball'
         @echo '  targz-pkg       - Build the kernel as a gzip compressed tarball'
diff --git a/scripts/package/buildtar b/scripts/package/buildtar
index aa0ccdbd1f47..28574ae55170 100644
--- a/scripts/package/buildtar
+++ b/scripts/package/buildtar
@@ -69,8 +69,8 @@ cp -v -- "${objtree}/vmlinux" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}"
 # Install arch-specific kernel image(s)
 #
 case "${ARCH}" in
-        i386|x86_64)
-                [ -f "${objtree}/arch/$ARCH/boot/bzImage" ] && cp -v -- "${objtree}/arch/$ARCH/boot/bzImage" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}"
+        x86|i386|x86_64)
+                [ -f "${objtree}/arch/x86/boot/bzImage" ] && cp -v -- "${objtree}/arch/x86/boot/bzImage" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}"
                 ;;
         alpha)
                 [ -f "${objtree}/arch/alpha/boot/vmlinux.gz" ] && cp -v -- "${objtree}/arch/alpha/boot/vmlinux.gz" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}"
diff --git a/scripts/patch-kernel b/scripts/patch-kernel
index 67e4b1868e50..ece46ef0ba54 100755
--- a/scripts/patch-kernel
+++ b/scripts/patch-kernel
@@ -65,7 +65,7 @@ sourcedir=${1-/usr/src/linux}
 patchdir=${2-.}
 stopvers=${3-default}
 
-if [ "$1" == -h -o "$1" == --help -o ! -r "$sourcedir/Makefile" ]; then
+if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then
 cat << USAGE
 usage: $PNAME [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
   source directory defaults to /usr/src/linux,
@@ -182,10 +182,12 @@ reversePatch () {
 }
 
 # set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
-TMPFILE=`mktemp .tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
+# force $TMPFILEs below to be in local directory: a slash character prevents
+# the dot command from using the search path.
+TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
 grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
 tr -d [:blank:] < $TMPFILE > $TMPFILE.1
-source $TMPFILE.1
+. $TMPFILE.1
 rm -f $TMPFILE*
 if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
 then
@@ -202,11 +204,7 @@ echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($
 EXTRAVER=
 if [ x$EXTRAVERSION != "x" ]
 then
-        if [ ${EXTRAVERSION:0:1} == "." ]; then
-                EXTRAVER=${EXTRAVERSION:1}
-        else
-                EXTRAVER=$EXTRAVERSION
-        fi
+        EXTRAVER=${EXTRAVERSION#.}
         EXTRAVER=${EXTRAVER%%[[:punct:]]*}
         #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
 fi
@@ -251,16 +249,16 @@ while :				# incrementing SUBLEVEL (s in v.p.s)
 do
     CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
     EXTRAVER=
-    if [ $stopvers == $CURRENTFULLVERSION ]; then
+    if [ $stopvers = $CURRENTFULLVERSION ]; then
         echo "Stopping at $CURRENTFULLVERSION base as requested."
         break
     fi
 
-    SUBLEVEL=$((SUBLEVEL + 1))
+    SUBLEVEL=$(($SUBLEVEL + 1))
     FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
     #echo "#___ trying $FULLVERSION ___"
 
-    if [ $((SUBLEVEL)) -gt $((STOPSUBLEVEL)) ]; then
+    if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then
         echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
         exit 1
     fi
@@ -297,7 +295,7 @@ fi
 if [ x$gotac != x ]; then
   # Out great user wants the -ac patches
         # They could have done -ac (get latest) or -acxx where xx=version they want
-        if [ $gotac == "-ac" ]; then
+        if [ $gotac = "-ac" ]; then
           # They want the latest version
                 HIGHESTPATCH=0
                 for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index 82e4993f0a73..52f032e409a3 100644
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -12,11 +12,36 @@ cd "${1:-.}" || usage
 if head=`git rev-parse --verify HEAD 2>/dev/null`; then
         # Do we have an untagged version?
         if git name-rev --tags HEAD | grep -E '^HEAD[[:space:]]+(.*~[0-9]*|undefined)$' > /dev/null; then
-                printf '%s%s' -g `echo "$head" | cut -c1-8`
+                git describe | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
         fi
 
         # Are there uncommitted changes?
-        if git diff-index HEAD | read dummy; then
+        git update-index --refresh --unmerged > /dev/null
+        if git diff-index --name-only HEAD | grep -v "^scripts/package" \
+            | read dummy; then
                 printf '%s' -dirty
         fi
+
+        # All done with git
+        exit
+fi
+
+# Check for mercurial and a mercurial repo.
+if hgid=`hg id 2>/dev/null`; then
+        tag=`printf '%s' "$hgid" | cut -d' ' -f2`
+
+        # Do we have an untagged version?
+        if [ -z "$tag" -o "$tag" = tip ]; then
+                id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
+                printf '%s%s' -hg "$id"
+        fi
+
+        # Are there uncommitted changes?
+        # These are represented by + after the changeset id.
+        case "$hgid" in
+                *+|*+\ *) printf '%s' -dirty ;;
+        esac
+
+        # All done with mercurial
+        exit
 fi