40 files changed, 1459 insertions, 370 deletions

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index 4bd9ea539129..44f52a4f5903 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -26,3 +26,37 @@ Description:
                 I/O statistics of partition <part>. The format is the
                 same as the above-written /sys/block/<disk>/stat
                 format.
+
+
+What:           /sys/block/<disk>/integrity/format
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Metadata format for integrity capable block device.
+                E.g. T10-DIF-TYPE1-CRC.
+
+
+What:           /sys/block/<disk>/integrity/read_verify
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Indicates whether the block layer should verify the
+                integrity of read requests serviced by devices that
+                support sending integrity metadata.
+
+
+What:           /sys/block/<disk>/integrity/tag_size
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Number of bytes of integrity tag space available per
+                512 bytes of data.
+
+
+What:           /sys/block/<disk>/integrity/write_generate
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Indicates whether the block layer should automatically
+                generate checksums for write requests bound for
+                devices that support receiving integrity metadata.
diff --git a/Documentation/ABI/testing/sysfs-bus-css b/Documentation/ABI/testing/sysfs-bus-css
new file mode 100644
index 000000000000..b585ec258a08
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-css
@@ -0,0 +1,35 @@
+What:           /sys/bus/css/devices/.../type
+Date:           March 2008
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the subchannel type, as reported by the hardware.
+                This attribute is present for all subchannel types.
+
+What:           /sys/bus/css/devices/.../modalias
+Date:           March 2008
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the module alias as reported with uevents.
+                It is of the format css:t<type> and present for all
+                subchannel types.
+
+What:           /sys/bus/css/drivers/io_subchannel/.../chpids
+Date:           December 2002
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the ids of the channel paths used by this
+                subchannel, as reported by the channel subsystem
+                during subchannel recognition.
+                Note: This is an I/O-subchannel specific attribute.
+Users:          s390-tools, HAL
+
+What:           /sys/bus/css/drivers/io_subchannel/.../pimpampom
+Date:           December 2002
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the PIM/PAM/POM values, as reported by the
+                channel subsystem when last queried by the common I/O
+                layer (this implies that this attribute is not neccessarily
+                in sync with the values current in the channel subsystem).
+                Note: This is an I/O-subchannel specific attribute.
+Users:          s390-tools, HAL
diff --git a/Documentation/ABI/testing/sysfs-firmware-memmap b/Documentation/ABI/testing/sysfs-firmware-memmap
new file mode 100644
index 000000000000..0d99ee6ae02e
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-memmap
@@ -0,0 +1,71 @@
+What:           /sys/firmware/memmap/
+Date:           June 2008
+Contact:        Bernhard Walle <bwalle@suse.de>
+Description:
+                On all platforms, the firmware provides a memory map which the
+                kernel reads. The resources from that memory map are registered
+                in the kernel resource tree and exposed to userspace via
+                /proc/iomem (together with other resources).
+
+                However, on most architectures that firmware-provided memory
+                map is modified afterwards by the kernel itself, either because
+                the kernel merges that memory map with other information or
+                just because the user overwrites that memory map via command
+                line.
+
+                kexec needs the raw firmware-provided memory map to setup the
+                parameter segment of the kernel that should be booted with
+                kexec. Also, the raw memory map is useful for debugging. For
+                that reason, /sys/firmware/memmap is an interface that provides
+                the raw memory map to userspace.
+
+                The structure is as follows: Under /sys/firmware/memmap there
+                are subdirectories with the number of the entry as their name:
+
+                        /sys/firmware/memmap/0
+                        /sys/firmware/memmap/1
+                        /sys/firmware/memmap/2
+                        /sys/firmware/memmap/3
+                        ...
+
+                The maximum depends on the number of memory map entries provided
+                by the firmware. The order is just the order that the firmware
+                provides.
+
+                Each directory contains three files:
+
+                start   : The start address (as hexadecimal number with the
+                          '0x' prefix).
+                end     : The end address, inclusive (regardless whether the
+                          firmware provides inclusive or exclusive ranges).
+                type    : Type of the entry as string. See below for a list of
+                          valid types.
+
+                So, for example:
+
+                        /sys/firmware/memmap/0/start
+                        /sys/firmware/memmap/0/end
+                        /sys/firmware/memmap/0/type
+                        /sys/firmware/memmap/1/start
+                        ...
+
+                Currently following types exist:
+
+                  - System RAM
+                  - ACPI Tables
+                  - ACPI Non-volatile Storage
+                  - reserved
+
+                Following shell snippet can be used to display that memory
+                map in a human-readable format:
+
+                -------------------- 8< ----------------------------------------
+                  #!/bin/bash
+                  cd /sys/firmware/memmap
+                  for dir in * ; do
+                      start=$(cat $dir/start)
+                      end=$(cat $dir/end)
+                      type=$(cat $dir/type)
+                      printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type"
+                  done
+                -------------------- >8 ----------------------------------------
diff --git a/Documentation/HOWTO b/Documentation/HOWTO
index 0291ade44c17..619e8caf30db 100644
--- a/Documentation/HOWTO
+++ b/Documentation/HOWTO
@@ -377,7 +377,7 @@ Bug Reporting
 bugzilla.kernel.org is where the Linux kernel developers track kernel
 bugs.  Users are encouraged to report all bugs that they find in this
 tool.  For details on how to use the kernel bugzilla, please see:
-        http://test.kernel.org/bugzilla/faq.html
+        http://bugzilla.kernel.org/page.cgi?id=faq.html
 
 The file REPORTING-BUGS in the main kernel source directory has a good
 template for how to report a possible kernel bug, and details what kind
diff --git a/Documentation/IRQ-affinity.txt b/Documentation/IRQ-affinity.txt
index 938d7dd05490..b4a615b78403 100644
--- a/Documentation/IRQ-affinity.txt
+++ b/Documentation/IRQ-affinity.txt
@@ -1,17 +1,26 @@
+ChangeLog:
+        Started by Ingo Molnar <mingo@redhat.com>
+        Update by Max Krasnyansky <maxk@qualcomm.com>
 
-SMP IRQ affinity, started by Ingo Molnar <mingo@redhat.com>
-
+SMP IRQ affinity
 
 /proc/irq/IRQ#/smp_affinity specifies which target CPUs are permitted
 for a given IRQ source. It's a bitmask of allowed CPUs. It's not allowed
 to turn off all CPUs, and if an IRQ controller does not support IRQ
 affinity then the value will not change from the default 0xffffffff.
 
+/proc/irq/default_smp_affinity specifies default affinity mask that applies
+to all non-active IRQs. Once IRQ is allocated/activated its affinity bitmask
+will be set to the default mask. It can then be changed as described above.
+Default mask is 0xffffffff.
+
 Here is an example of restricting IRQ44 (eth1) to CPU0-3 then restricting
-the IRQ to CPU4-7 (this is an 8-CPU SMP box):
+it to CPU4-7 (this is an 8-CPU SMP box):
 
+[root@moon 44]# cd /proc/irq/44
 [root@moon 44]# cat smp_affinity
 ffffffff
+
 [root@moon 44]# echo 0f > smp_affinity
 [root@moon 44]# cat smp_affinity
 0000000f
@@ -21,17 +30,27 @@ PING hell (195.4.7.3): 56 data bytes
 --- hell ping statistics ---
 6029 packets transmitted, 6027 packets received, 0% packet loss
 round-trip min/avg/max = 0.1/0.1/0.4 ms
-[root@moon 44]# cat /proc/interrupts | grep 44:
- 44:          0       1785       1785       1783       1783          1
-1          0   IO-APIC-level  eth1
+[root@moon 44]# cat /proc/interrupts | grep 'CPU\|44:'
+           CPU0       CPU1       CPU2       CPU3      CPU4       CPU5        CPU6       CPU7
+ 44:       1068       1785       1785       1783         0          0           0         0    IO-APIC-level  eth1
+
+As can be seen from the line above IRQ44 was delivered only to the first four
+processors (0-3).
+Now lets restrict that IRQ to CPU(4-7).
+
 [root@moon 44]# echo f0 > smp_affinity
+[root@moon 44]# cat smp_affinity
+000000f0
 [root@moon 44]# ping -f h
 PING hell (195.4.7.3): 56 data bytes
 ..
 --- hell ping statistics ---
 2779 packets transmitted, 2777 packets received, 0% packet loss
 round-trip min/avg/max = 0.1/0.5/585.4 ms
-[root@moon 44]# cat /proc/interrupts | grep 44:
- 44:       1068       1785       1785       1784       1784       1069       1070       1069   IO-APIC-level  eth1
-[root@moon 44]#
+[root@moon 44]# cat /proc/interrupts |  'CPU\|44:'
+           CPU0       CPU1       CPU2       CPU3      CPU4       CPU5        CPU6       CPU7
+ 44:       1068       1785       1785       1783      1784       1069        1070       1069   IO-APIC-level  eth1
+
+This time around IRQ44 was delivered only to the last four processors.
+i.e counters for the CPU0-3 did not change.
 
diff --git a/Documentation/block/data-integrity.txt b/Documentation/block/data-integrity.txt
new file mode 100644
index 000000000000..e9dc8d86adc7
--- /dev/null
+++ b/Documentation/block/data-integrity.txt
@@ -0,0 +1,327 @@
+----------------------------------------------------------------------
+1. INTRODUCTION
+
+Modern filesystems feature checksumming of data and metadata to
+protect against data corruption.  However, the detection of the
+corruption is done at read time which could potentially be months
+after the data was written.  At that point the original data that the
+application tried to write is most likely lost.
+
+The solution is to ensure that the disk is actually storing what the
+application meant it to.  Recent additions to both the SCSI family
+protocols (SBC Data Integrity Field, SCC protection proposal) as well
+as SATA/T13 (External Path Protection) try to remedy this by adding
+support for appending integrity metadata to an I/O.  The integrity
+metadata (or protection information in SCSI terminology) includes a
+checksum for each sector as well as an incrementing counter that
+ensures the individual sectors are written in the right order.  And
+for some protection schemes also that the I/O is written to the right
+place on disk.
+
+Current storage controllers and devices implement various protective
+measures, for instance checksumming and scrubbing.  But these
+technologies are working in their own isolated domains or at best
+between adjacent nodes in the I/O path.  The interesting thing about
+DIF and the other integrity extensions is that the protection format
+is well defined and every node in the I/O path can verify the
+integrity of the I/O and reject it if corruption is detected.  This
+allows not only corruption prevention but also isolation of the point
+of failure.
+
+----------------------------------------------------------------------
+2. THE DATA INTEGRITY EXTENSIONS
+
+As written, the protocol extensions only protect the path between
+controller and storage device.  However, many controllers actually
+allow the operating system to interact with the integrity metadata
+(IMD).  We have been working with several FC/SAS HBA vendors to enable
+the protection information to be transferred to and from their
+controllers.
+
+The SCSI Data Integrity Field works by appending 8 bytes of protection
+information to each sector.  The data + integrity metadata is stored
+in 520 byte sectors on disk.  Data + IMD are interleaved when
+transferred between the controller and target.  The T13 proposal is
+similar.
+
+Because it is highly inconvenient for operating systems to deal with
+520 (and 4104) byte sectors, we approached several HBA vendors and
+encouraged them to allow separation of the data and integrity metadata
+scatter-gather lists.
+
+The controller will interleave the buffers on write and split them on
+read.  This means that the Linux can DMA the data buffers to and from
+host memory without changes to the page cache.
+
+Also, the 16-bit CRC checksum mandated by both the SCSI and SATA specs
+is somewhat heavy to compute in software.  Benchmarks found that
+calculating this checksum had a significant impact on system
+performance for a number of workloads.  Some controllers allow a
+lighter-weight checksum to be used when interfacing with the operating
+system.  Emulex, for instance, supports the TCP/IP checksum instead.
+The IP checksum received from the OS is converted to the 16-bit CRC
+when writing and vice versa.  This allows the integrity metadata to be
+generated by Linux or the application at very low cost (comparable to
+software RAID5).
+
+The IP checksum is weaker than the CRC in terms of detecting bit
+errors.  However, the strength is really in the separation of the data
+buffers and the integrity metadata.  These two distinct buffers much
+match up for an I/O to complete.
+
+The separation of the data and integrity metadata buffers as well as
+the choice in checksums is referred to as the Data Integrity
+Extensions.  As these extensions are outside the scope of the protocol
+bodies (T10, T13), Oracle and its partners are trying to standardize
+them within the Storage Networking Industry Association.
+
+----------------------------------------------------------------------
+3. KERNEL CHANGES
+
+The data integrity framework in Linux enables protection information
+to be pinned to I/Os and sent to/received from controllers that
+support it.
+
+The advantage to the integrity extensions in SCSI and SATA is that
+they enable us to protect the entire path from application to storage
+device.  However, at the same time this is also the biggest
+disadvantage. It means that the protection information must be in a
+format that can be understood by the disk.
+
+Generally Linux/POSIX applications are agnostic to the intricacies of
+the storage devices they are accessing.  The virtual filesystem switch
+and the block layer make things like hardware sector size and
+transport protocols completely transparent to the application.
+
+However, this level of detail is required when preparing the
+protection information to send to a disk.  Consequently, the very
+concept of an end-to-end protection scheme is a layering violation.
+It is completely unreasonable for an application to be aware whether
+it is accessing a SCSI or SATA disk.
+
+The data integrity support implemented in Linux attempts to hide this
+from the application.  As far as the application (and to some extent
+the kernel) is concerned, the integrity metadata is opaque information
+that's attached to the I/O.
+
+The current implementation allows the block layer to automatically
+generate the protection information for any I/O.  Eventually the
+intent is to move the integrity metadata calculation to userspace for
+user data.  Metadata and other I/O that originates within the kernel
+will still use the automatic generation interface.
+
+Some storage devices allow each hardware sector to be tagged with a
+16-bit value.  The owner of this tag space is the owner of the block
+device.  I.e. the filesystem in most cases.  The filesystem can use
+this extra space to tag sectors as they see fit.  Because the tag
+space is limited, the block interface allows tagging bigger chunks by
+way of interleaving.  This way, 8*16 bits of information can be
+attached to a typical 4KB filesystem block.
+
+This also means that applications such as fsck and mkfs will need
+access to manipulate the tags from user space.  A passthrough
+interface for this is being worked on.
+
+
+----------------------------------------------------------------------
+4. BLOCK LAYER IMPLEMENTATION DETAILS
+
+4.1 BIO
+
+The data integrity patches add a new field to struct bio when
+CONFIG_BLK_DEV_INTEGRITY is enabled.  bio->bi_integrity is a pointer
+to a struct bip which contains the bio integrity payload.  Essentially
+a bip is a trimmed down struct bio which holds a bio_vec containing
+the integrity metadata and the required housekeeping information (bvec
+pool, vector count, etc.)
+
+A kernel subsystem can enable data integrity protection on a bio by
+calling bio_integrity_alloc(bio).  This will allocate and attach the
+bip to the bio.
+
+Individual pages containing integrity metadata can subsequently be
+attached using bio_integrity_add_page().
+
+bio_free() will automatically free the bip.
+
+
+4.2 BLOCK DEVICE
+
+Because the format of the protection data is tied to the physical
+disk, each block device has been extended with a block integrity
+profile (struct blk_integrity).  This optional profile is registered
+with the block layer using blk_integrity_register().
+
+The profile contains callback functions for generating and verifying
+the protection data, as well as getting and setting application tags.
+The profile also contains a few constants to aid in completing,
+merging and splitting the integrity metadata.
+
+Layered block devices will need to pick a profile that's appropriate
+for all subdevices.  blk_integrity_compare() can help with that.  DM
+and MD linear, RAID0 and RAID1 are currently supported.  RAID4/5/6
+will require extra work due to the application tag.
+
+
+----------------------------------------------------------------------
+5.0 BLOCK LAYER INTEGRITY API
+
+5.1 NORMAL FILESYSTEM
+
+    The normal filesystem is unaware that the underlying block device
+    is capable of sending/receiving integrity metadata.  The IMD will
+    be automatically generated by the block layer at submit_bio() time
+    in case of a WRITE.  A READ request will cause the I/O integrity
+    to be verified upon completion.
+
+    IMD generation and verification can be toggled using the
+
+      /sys/block/<bdev>/integrity/write_generate
+
+    and
+
+      /sys/block/<bdev>/integrity/read_verify
+
+    flags.
+
+
+5.2 INTEGRITY-AWARE FILESYSTEM
+
+    A filesystem that is integrity-aware can prepare I/Os with IMD
+    attached.  It can also use the application tag space if this is
+    supported by the block device.
+
+
+    int bdev_integrity_enabled(block_device, int rw);
+
+      bdev_integrity_enabled() will return 1 if the block device
+      supports integrity metadata transfer for the data direction
+      specified in 'rw'.
+
+      bdev_integrity_enabled() honors the write_generate and
+      read_verify flags in sysfs and will respond accordingly.
+
+
+    int bio_integrity_prep(bio);
+
+      To generate IMD for WRITE and to set up buffers for READ, the
+      filesystem must call bio_integrity_prep(bio).
+
+      Prior to calling this function, the bio data direction and start
+      sector must be set, and the bio should have all data pages
+      added.  It is up to the caller to ensure that the bio does not
+      change while I/O is in progress.
+
+      bio_integrity_prep() should only be called if
+      bio_integrity_enabled() returned 1.
+
+
+    int bio_integrity_tag_size(bio);
+
+      If the filesystem wants to use the application tag space it will
+      first have to find out how much storage space is available.
+      Because tag space is generally limited (usually 2 bytes per
+      sector regardless of sector size), the integrity framework
+      supports interleaving the information between the sectors in an
+      I/O.
+
+      Filesystems can call bio_integrity_tag_size(bio) to find out how
+      many bytes of storage are available for that particular bio.
+
+      Another option is bdev_get_tag_size(block_device) which will
+      return the number of available bytes per hardware sector.
+
+
+    int bio_integrity_set_tag(bio, void *tag_buf, len);
+
+      After a successful return from bio_integrity_prep(),
+      bio_integrity_set_tag() can be used to attach an opaque tag
+      buffer to a bio.  Obviously this only makes sense if the I/O is
+      a WRITE.
+
+
+    int bio_integrity_get_tag(bio, void *tag_buf, len);
+
+      Similarly, at READ I/O completion time the filesystem can
+      retrieve the tag buffer using bio_integrity_get_tag().
+
+
+6.3 PASSING EXISTING INTEGRITY METADATA
+
+    Filesystems that either generate their own integrity metadata or
+    are capable of transferring IMD from user space can use the
+    following calls:
+
+
+    struct bip * bio_integrity_alloc(bio, gfp_mask, nr_pages);
+
+      Allocates the bio integrity payload and hangs it off of the bio.
+      nr_pages indicate how many pages of protection data need to be
+      stored in the integrity bio_vec list (similar to bio_alloc()).
+
+      The integrity payload will be freed at bio_free() time.
+
+
+    int bio_integrity_add_page(bio, page, len, offset);
+
+      Attaches a page containing integrity metadata to an existing
+      bio.  The bio must have an existing bip,
+      i.e. bio_integrity_alloc() must have been called.  For a WRITE,
+      the integrity metadata in the pages must be in a format
+      understood by the target device with the notable exception that
+      the sector numbers will be remapped as the request traverses the
+      I/O stack.  This implies that the pages added using this call
+      will be modified during I/O!  The first reference tag in the
+      integrity metadata must have a value of bip->bip_sector.
+
+      Pages can be added using bio_integrity_add_page() as long as
+      there is room in the bip bio_vec array (nr_pages).
+
+      Upon completion of a READ operation, the attached pages will
+      contain the integrity metadata received from the storage device.
+      It is up to the receiver to process them and verify data
+      integrity upon completion.
+
+
+6.4 REGISTERING A BLOCK DEVICE AS CAPABLE OF EXCHANGING INTEGRITY
+    METADATA
+
+    To enable integrity exchange on a block device the gendisk must be
+    registered as capable:
+
+    int blk_integrity_register(gendisk, blk_integrity);
+
+      The blk_integrity struct is a template and should contain the
+      following:
+
+        static struct blk_integrity my_profile = {
+            .name                   = "STANDARDSBODY-TYPE-VARIANT-CSUM",
+            .generate_fn            = my_generate_fn,
+            .verify_fn              = my_verify_fn,
+            .get_tag_fn             = my_get_tag_fn,
+            .set_tag_fn             = my_set_tag_fn,
+            .tuple_size             = sizeof(struct my_tuple_size),
+            .tag_size               = <tag bytes per hw sector>,
+        };
+
+      'name' is a text string which will be visible in sysfs.  This is
+      part of the userland API so chose it carefully and never change
+      it.  The format is standards body-type-variant.
+      E.g. T10-DIF-TYPE1-IP or T13-EPP-0-CRC.
+
+      'generate_fn' generates appropriate integrity metadata (for WRITE).
+
+      'verify_fn' verifies that the data buffer matches the integrity
+      metadata.
+
+      'tuple_size' must be set to match the size of the integrity
+      metadata per sector.  I.e. 8 for DIF and EPP.
+
+      'tag_size' must be set to identify how many bytes of tag space
+      are available per hardware sector.  For DIF this is either 2 or
+      0 depending on the value of the Control Mode Page ATO bit.
+
+      See 6.2 for a description of get_tag_fn and set_tag_fn.
+
+----------------------------------------------------------------------
+2007-12-24 Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt
index b61cb9564023..bd699da24666 100644
--- a/Documentation/cputopology.txt
+++ b/Documentation/cputopology.txt
@@ -14,9 +14,8 @@ represent the thread siblings to cpu X in the same physical package;
 To implement it in an architecture-neutral way, a new source file,
 drivers/base/topology.c, is to export the 4 attributes.
 
-If one architecture wants to support this feature, it just needs to
-implement 4 defines, typically in file include/asm-XXX/topology.h.
-The 4 defines are:
+For an architecture to support this feature, it must define some of
+these macros in include/asm-XXX/topology.h:
 #define topology_physical_package_id(cpu)
 #define topology_core_id(cpu)
 #define topology_thread_siblings(cpu)
@@ -25,17 +24,10 @@ The 4 defines are:
 The type of **_id is int.
 The type of siblings is cpumask_t.
 
-To be consistent on all architectures, the 4 attributes should have
-default values if their values are unavailable. Below is the rule.
-1) physical_package_id: If cpu has no physical package id, -1 is the
-default value.
-2) core_id: If cpu doesn't support multi-core, its core id is 0.
-3) thread_siblings: Just include itself, if the cpu doesn't support
-HT/multi-thread.
-4) core_siblings: Just include itself, if the cpu doesn't support
-multi-core and HT/Multi-thread.
-
-So be careful when declaring the 4 defines in include/asm-XXX/topology.h.
-
-If an attribute isn't defined on an architecture, it won't be exported.
-
+To be consistent on all architectures, include/linux/topology.h
+provides default definitions for any of the above macros that are
+not defined by include/asm-XXX/topology.h:
+1) physical_package_id: -1
+2) core_id: 0
+3) thread_siblings: just the given CPU
+4) core_siblings: just the given CPU
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 46ece3fba6f9..65a1482457a8 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -222,13 +222,6 @@ Who:	Thomas Gleixner <tglx@linutronix.de>
 
 ---------------------------
 
-What:   i2c-i810, i2c-prosavage and i2c-savage4
-When:   May 2008
-Why:    These drivers are superseded by i810fb, intelfb and savagefb.
-Who:    Jean Delvare <khali@linux-fr.org>
-
----------------------------
-
 What (Why):
         - include/linux/netfilter_ipv4/ipt_TOS.h ipt_tos.h header files
           (superseded by xt_TOS/xt_tos target & match)
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 0c5086db8352..80e193d82e2e 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -13,72 +13,93 @@ Mailing list: linux-ext4@vger.kernel.org
 1. Quick usage instructions:
 ===========================
 
-  - Grab updated e2fsprogs from
-    ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs-interim/
-    This is a patchset on top of e2fsprogs-1.39, which can be found at
+  - Compile and install the latest version of e2fsprogs (as of this
+    writing version 1.41) from:
+
+    http://sourceforge.net/project/showfiles.php?group_id=2406
+        
+        or
+
     ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/
 
-  - It's still mke2fs -j /dev/hda1
+        or grab the latest git repository from:
+
+    git://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
+
+  - Create a new filesystem using the ext4dev filesystem type:
+
+        # mke2fs -t ext4dev /dev/hda1
+
+    Or configure an existing ext3 filesystem to support extents and set
+    the test_fs flag to indicate that it's ok for an in-development
+    filesystem to touch this filesystem:
 
-  - mount /dev/hda1 /wherever -t ext4dev
+        # tune2fs -O extents -E test_fs /dev/hda1
 
-  - To enable extents,
+    If the filesystem was created with 128 byte inodes, it can be
+    converted to use 256 byte for greater efficiency via:
 
-        mount /dev/hda1 /wherever -t ext4dev -o extents
+        # tune2fs -I 256 /dev/hda1
 
-  - The filesystem is compatible with the ext3 driver until you add a file
-    which has extents (ie: `mount -o extents', then create a file).
+    (Note: we currently do not have tools to convert an ext4dev
+    filesystem back to ext3; so please do not do try this on production
+    filesystems.)
 
-    NOTE: The "extents" mount flag is temporary.  It will soon go away and
-    extents will be enabled by the "-o extents" flag to mke2fs or tune2fs
+  - Mounting:
+
+        # mount -t ext4dev /dev/hda1 /wherever
 
   - When comparing performance with other filesystems, remember that
-    ext3/4 by default offers higher data integrity guarantees than most.  So
-    when comparing with a metadata-only journalling filesystem, use `mount -o
-    data=writeback'.  And you might as well use `mount -o nobh' too along
-    with it.  Making the journal larger than the mke2fs default often helps
-    performance with metadata-intensive workloads.
+    ext3/4 by default offers higher data integrity guarantees than most.
+    So when comparing with a metadata-only journalling filesystem, such
+    as ext3, use `mount -o data=writeback'.  And you might as well use
+    `mount -o nobh' too along with it.  Making the journal larger than
+    the mke2fs default often helps performance with metadata-intensive
+    workloads.
 
 2. Features
 ===========
 
 2.1 Currently available
 
-* ability to use filesystems > 16TB
+* ability to use filesystems > 16TB (e2fsprogs support not available yet)
 * extent format reduces metadata overhead (RAM, IO for access, transactions)
 * extent format more robust in face of on-disk corruption due to magics,
 * internal redunancy in tree
-
-2.1 Previously available, soon to be enabled by default by "mkefs.ext4":
-
-* dir_index and resize inode will be on by default
-* large inodes will be used by default for fast EAs, nsec timestamps, etc
+* improved file allocation (multi-block alloc)
+* fix 32000 subdirectory limit
+* nsec timestamps for mtime, atime, ctime, create time
+* inode version field on disk (NFSv4, Lustre)
+* reduced e2fsck time via uninit_bg feature
+* journal checksumming for robustness, performance
+* persistent file preallocation (e.g for streaming media, databases)
+* ability to pack bitmaps and inode tables into larger virtual groups via the
+  flex_bg feature
+* large file support
+* Inode allocation using large virtual block groups via flex_bg
+* delayed allocation
+* large block (up to pagesize) support
+* efficent new ordered mode in JBD2 and ext4(avoid using buffer head to force
+  the ordering)
 
 2.2 Candidate features for future inclusion
 
-There are several under discussion, whether they all make it in is
-partly a function of how much time everyone has to work on them:
+* Online defrag (patches available but not well tested)
+* reduced mke2fs time via lazy itable initialization in conjuction with
+  the uninit_bg feature (capability to do this is available in e2fsprogs
+  but a kernel thread to do lazy zeroing of unused inode table blocks
+  after filesystem is first mounted is required for safety)
 
-* improved file allocation (multi-block alloc, delayed alloc; basically done)
-* fix 32000 subdirectory limit (patch exists, needs some e2fsck work)
-* nsec timestamps for mtime, atime, ctime, create time (patch exists,
-  needs some e2fsck work)
-* inode version field on disk (NFSv4, Lustre; prototype exists)
-* reduced mke2fs/e2fsck time via uninitialized groups (prototype exists)
-* journal checksumming for robustness, performance (prototype exists)
-* persistent file preallocation (e.g for streaming media, databases)
+There are several others under discussion, whether they all make it in is
+partly a function of how much time everyone has to work on them. Features like
+metadata checksumming have been discussed and planned for a bit but no patches
+exist yet so I'm not sure they're in the near-term roadmap.
 
-Features like metadata checksumming have been discussed and planned for
-a bit but no patches exist yet so I'm not sure they're in the near-term
-roadmap.
+The big performance win will come with mballoc, delalloc and flex_bg
+grouping of bitmaps and inode tables.  Some test results available here:
 
-The big performance win will come with mballoc and delalloc.  CFS has
-been using mballoc for a few years already with Lustre, and IBM + Bull
-did a lot of benchmarking on it.  The reason it isn't in the first set of
-patches is partly a manageability issue, and partly because it doesn't
-directly affect the on-disk format (outside of much better allocation)
-so it isn't critical to get into the first round of changes.  I believe
-Alex is working on a new set of patches right now.
+ - http://www.bullopensource.org/ext4/20080530/ffsb-write-2.6.26-rc2.html
+ - http://www.bullopensource.org/ext4/20080530/ffsb-readwrite-2.6.26-rc2.html
 
 3. Options
 ==========
@@ -222,9 +243,11 @@ 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.
-
+delalloc        (*)     Deferring block allocation until write-out time.
+nodelalloc              Disable delayed allocation. Blocks are allocation
+                        when data is copied from user to page cache.
 Data Mode
----------
+=========
 There are 3 different data modes:
 
 * writeback mode
@@ -236,10 +259,10 @@ typically provide the best ext4 performance.
 
 * ordered mode
 In data=ordered mode, ext4 only officially journals metadata, but it logically
-groups metadata and data blocks into a single unit called a transaction.  When
-it's time to write the new metadata out to disk, the associated data blocks
-are written first.  In general, this mode performs slightly slower than
-writeback but significantly faster than journal mode.
+groups metadata information related to data changes with the data blocks into a
+single unit called a transaction.  When it's time to write the new metadata
+out to disk, the associated data blocks are written first.  In general,
+this mode performs slightly slower than writeback but significantly faster than journal mode.
 
 * journal mode
 data=journal mode provides full data and metadata journaling.  All new data is
@@ -247,7 +270,8 @@ written to the journal first, and then to its final location.
 In the event of a crash, the journal can be replayed, bringing both data and
 metadata into a consistent state.  This mode is the slowest except when data
 needs to be read from and written to disk at the same time where it
-outperforms all others modes.
+outperforms all others modes.  Curently ext4 does not have delayed
+allocation support if this data journalling mode is selected.
 
 References
 ==========
@@ -256,7 +280,8 @@ kernel source:	<file:fs/ext4/>
                 <file:fs/jbd2/>
 
 programs:       http://e2fsprogs.sourceforge.net/
-                http://ext2resize.sourceforge.net
 
 useful links:   http://fedoraproject.org/wiki/ext3-devel
                 http://www.bullopensource.org/ext4/
+                http://ext4.wiki.kernel.org/index.php/Main_Page
+                http://fedoraproject.org/wiki/Features/Ext4
diff --git a/Documentation/filesystems/gfs2-glocks.txt b/Documentation/filesystems/gfs2-glocks.txt
new file mode 100644
index 000000000000..4dae9a3840bf
--- /dev/null
+++ b/Documentation/filesystems/gfs2-glocks.txt
@@ -0,0 +1,114 @@
+                   Glock internal locking rules
+                  ------------------------------
+
+This documents the basic principles of the glock state machine
+internals. Each glock (struct gfs2_glock in fs/gfs2/incore.h)
+has two main (internal) locks:
+
+ 1. A spinlock (gl_spin) which protects the internal state such
+    as gl_state, gl_target and the list of holders (gl_holders)
+ 2. A non-blocking bit lock, GLF_LOCK, which is used to prevent other
+    threads from making calls to the DLM, etc. at the same time. If a
+    thread takes this lock, it must then call run_queue (usually via the
+    workqueue) when it releases it in order to ensure any pending tasks
+    are completed.
+
+The gl_holders list contains all the queued lock requests (not
+just the holders) associated with the glock. If there are any
+held locks, then they will be contiguous entries at the head
+of the list. Locks are granted in strictly the order that they
+are queued, except for those marked LM_FLAG_PRIORITY which are
+used only during recovery, and even then only for journal locks.
+
+There are three lock states that users of the glock layer can request,
+namely shared (SH), deferred (DF) and exclusive (EX). Those translate
+to the following DLM lock modes:
+
+Glock mode    | DLM lock mode
+------------------------------
+    UN        |    IV/NL  Unlocked (no DLM lock associated with glock) or NL
+    SH        |    PR     (Protected read)
+    DF        |    CW     (Concurrent write)
+    EX        |    EX     (Exclusive)
+
+Thus DF is basically a shared mode which is incompatible with the "normal"
+shared lock mode, SH. In GFS2 the DF mode is used exclusively for direct I/O
+operations. The glocks are basically a lock plus some routines which deal
+with cache management. The following rules apply for the cache:
+
+Glock mode   |  Cache data | Cache Metadata | Dirty Data | Dirty Metadata
+--------------------------------------------------------------------------
+    UN       |     No      |       No       |     No     |      No
+    SH       |     Yes     |       Yes      |     No     |      No
+    DF       |     No      |       Yes      |     No     |      No
+    EX       |     Yes     |       Yes      |     Yes    |      Yes
+
+These rules are implemented using the various glock operations which
+are defined for each type of glock. Not all types of glocks use
+all the modes. Only inode glocks use the DF mode for example.
+
+Table of glock operations and per type constants:
+
+Field            | Purpose
+----------------------------------------------------------------------------
+go_xmote_th      | Called before remote state change (e.g. to sync dirty data)
+go_xmote_bh      | Called after remote state change (e.g. to refill cache)
+go_inval         | Called if remote state change requires invalidating the cache
+go_demote_ok     | Returns boolean value of whether its ok to demote a glock
+                 | (e.g. checks timeout, and that there is no cached data)
+go_lock          | Called for the first local holder of a lock
+go_unlock        | Called on the final local unlock of a lock
+go_dump          | Called to print content of object for debugfs file, or on
+                 | error to dump glock to the log.
+go_type;         | The type of the glock, LM_TYPE_.....
+go_min_hold_time | The minimum hold time
+
+The minimum hold time for each lock is the time after a remote lock
+grant for which we ignore remote demote requests. This is in order to
+prevent a situation where locks are being bounced around the cluster
+from node to node with none of the nodes making any progress. This
+tends to show up most with shared mmaped files which are being written
+to by multiple nodes. By delaying the demotion in response to a
+remote callback, that gives the userspace program time to make
+some progress before the pages are unmapped.
+
+There is a plan to try and remove the go_lock and go_unlock callbacks
+if possible, in order to try and speed up the fast path though the locking.
+Also, eventually we hope to make the glock "EX" mode locally shared
+such that any local locking will be done with the i_mutex as required
+rather than via the glock.
+
+Locking rules for glock operations:
+
+Operation     |  GLF_LOCK bit lock held |  gl_spin spinlock held
+-----------------------------------------------------------------
+go_xmote_th   |       Yes               |       No
+go_xmote_bh   |       Yes               |       No
+go_inval      |       Yes               |       No
+go_demote_ok  |       Sometimes         |       Yes
+go_lock       |       Yes               |       No
+go_unlock     |       Yes               |       No
+go_dump       |       Sometimes         |       Yes
+
+N.B. Operations must not drop either the bit lock or the spinlock
+if its held on entry. go_dump and do_demote_ok must never block.
+Note that go_dump will only be called if the glock's state
+indicates that it is caching uptodate data.
+
+Glock locking order within GFS2:
+
+ 1. i_mutex (if required)
+ 2. Rename glock (for rename only)
+ 3. Inode glock(s)
+    (Parents before children, inodes at "same level" with same parent in
+     lock number order)
+ 4. Rgrp glock(s) (for (de)allocation operations)
+ 5. Transaction glock (via gfs2_trans_begin) for non-read operations
+ 6. Page lock  (always last, very important!)
+
+There are two glocks per inode. One deals with access to the inode
+itself (locking order as above), and the other, known as the iopen
+glock is used in conjunction with the i_nlink field in the inode to
+determine the lifetime of the inode in question. Locking of inodes
+is on a per-inode basis. Locking of rgrps is on a per rgrp basis.
+
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index dbc3c6a3650f..7f268f327d75 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -380,28 +380,35 @@ i386 and x86_64 platforms support the new IRQ vector displays.
 Of some interest is the introduction of the /proc/irq directory to 2.4.
 It could be used to set IRQ to CPU affinity, this means that you can "hook" an
 IRQ to only one CPU, or to exclude a CPU of handling IRQs. The contents of the
-irq subdir is one subdir for each IRQ, and one file; prof_cpu_mask
+irq subdir is one subdir for each IRQ, and two files; default_smp_affinity and
+prof_cpu_mask.
 
 For example 
   > ls /proc/irq/
   0  10  12  14  16  18  2  4  6  8  prof_cpu_mask
-  1  11  13  15  17  19  3  5  7  9
+  1  11  13  15  17  19  3  5  7  9  default_smp_affinity
   > ls /proc/irq/0/
   smp_affinity
 
-The contents of the prof_cpu_mask file and each smp_affinity file for each IRQ
-is the same by default:
+smp_affinity is a bitmask, in which you can specify which CPUs can handle the
+IRQ, you can set it by doing:
 
-  > cat /proc/irq/0/smp_affinity 
-  ffffffff
+  > echo 1 > /proc/irq/10/smp_affinity
+
+This means that only the first CPU will handle the IRQ, but you can also echo
+5 which means that only the first and fourth CPU can handle the IRQ.
 
-It's a bitmask, in which you can specify which CPUs can handle the IRQ, you can
-set it by doing:
+The contents of each smp_affinity file is the same by default:
+
+  > cat /proc/irq/0/smp_affinity
+  ffffffff
 
-  > echo 1 > /proc/irq/prof_cpu_mask
+The default_smp_affinity mask applies to all non-active IRQs, which are the
+IRQs which have not yet been allocated/activated, and hence which lack a
+/proc/irq/[0-9]* directory.
 
-This means that only the first CPU will handle the IRQ, but you can also echo 5
-which means that only the first and fourth CPU can handle the IRQ.
+prof_cpu_mask specifies which CPUs are to be profiled by the system wide
+profiler. Default value is ffffffff (all cpus).
 
 The way IRQs are routed is handled by the IO-APIC, and it's Round Robin
 between all the CPUs which are allowed to handle it. As usual the kernel has
diff --git a/Documentation/ftrace.txt b/Documentation/ftrace.txt
index 13e4bf054c38..77d3faa1a611 100644
--- a/Documentation/ftrace.txt
+++ b/Documentation/ftrace.txt
@@ -2,8 +2,11 @@
                 ========================
 
 Copyright 2008 Red Hat Inc.
-Author: Steven Rostedt <srostedt@redhat.com>
+   Author:   Steven Rostedt <srostedt@redhat.com>
+  License:   The GNU Free Documentation License, Version 1.2
+Reviewers:   Elias Oltmanns and Randy Dunlap
 
+Writen for: 2.6.26-rc8 linux-2.6-tip.git tip/tracing/ftrace branch
 
 Introduction
 ------------
@@ -46,7 +49,7 @@ of ftrace. Here is a list of some of the key files:
                 that is configured.
 
   available_tracers : This holds the different types of tracers that
-                has been compiled into the kernel. The tracers
+                have been compiled into the kernel. The tracers
                 listed here can be configured by echoing in their
                 name into current_tracer.
 
@@ -90,11 +93,13 @@ of ftrace. Here is a list of some of the key files:
   trace_entries : This sets or displays the number of trace
                 entries each CPU buffer can hold. The tracer buffers
                 are the same size for each CPU, so care must be
-                taken when modifying the trace_entries. The number
-                of actually entries will be the number given
-                times the number of possible CPUS. The buffers
-                are saved as individual pages, and the actual entries
-                will always be rounded up to entries per page.
+                taken when modifying the trace_entries. The trace
+                buffers are allocated in pages (blocks of memory that
+                the kernel uses for allocation, usually 4 KB in size).
+                Since each entry is smaller than a page, if the last
+                allocated page has room for more entries than were
+                requested, the rest of the page is used to allocate
+                entries.
 
                 This can only be updated when the current_tracer
                 is set to "none".
@@ -114,13 +119,13 @@ of ftrace. Here is a list of some of the key files:
                 in performance.  This also has a side effect of
                 enabling or disabling specific functions to be
                 traced.  Echoing in names of functions into this
-                file will limit the trace to only those files.
+                file will limit the trace to only these functions.
 
   set_ftrace_notrace: This has the opposite effect that
                 set_ftrace_filter has. Any function that is added
                 here will not be traced. If a function exists
-                in both set_ftrace_filter and set_ftrace_notrace
-                the function will _not_ bet traced.
+                in both set_ftrace_filter and set_ftrace_notrace,
+                the function will _not_ be traced.
 
   available_filter_functions : When a function is encountered the first
                 time by the dynamic tracer, it is recorded and
@@ -138,7 +143,7 @@ Here are the list of current tracers that can be configured.
 
   ftrace - function tracer that uses mcount to trace all functions.
                 It is possible to filter out which functions that are
-                traced when dynamic ftrace is configured in.
+                to be traced when dynamic ftrace is configured in.
 
   sched_switch - traces the context switches between tasks.
 
@@ -297,13 +302,13 @@ explains which is which.
 
 The above is mostly meaningful for kernel developers.
 
-  time: This differs from the trace output where as the trace output
-        contained a absolute timestamp. This timestamp is relative
-        to the start of the first entry in the the trace.
+  time: This differs from the trace file output. The trace file output
+        included an absolute timestamp. The timestamp used by the
+        latency_trace file is relative to the start of the trace.
 
   delay: This is just to help catch your eye a bit better. And
         needs to be fixed to be only relative to the same CPU.
-        The marks is determined by the difference between this
+        The marks are determined by the difference between this
         current trace and the next trace.
          '!' - greater than preempt_mark_thresh (default 100)
          '+' - greater than 1 microsecond
@@ -322,13 +327,13 @@ output. To see what is available, simply cat the file:
   print-parent nosym-offset nosym-addr noverbose noraw nohex nobin \
  noblock nostacktrace nosched-tree
 
-To disable one of the options, echo in the option appended with "no".
+To disable one of the options, echo in the option prepended with "no".
 
   echo noprint-parent > /debug/tracing/iter_ctrl
 
 To enable an option, leave off the "no".
 
-  echo sym-offest > /debug/tracing/iter_ctrl
+  echo sym-offset > /debug/tracing/iter_ctrl
 
 Here are the available options:
 
@@ -344,7 +349,7 @@ Here are the available options:
 
   sym-offset - Display not only the function name, but also the offset
                 in the function. For example, instead of seeing just
-                "ktime_get" you will see "ktime_get+0xb/0x20"
+                "ktime_get", you will see "ktime_get+0xb/0x20".
 
   sym-offset:
    bash-4000  [01]  1477.606694: simple_strtoul+0x6/0xa0
@@ -364,7 +369,7 @@ Here are the available options:
         user applications that can translate the raw numbers better than
         having it done in the kernel.
 
-  hex - similar to raw, but the numbers will be in a hexadecimal format.
+  hex - Similar to raw, but the numbers will be in a hexadecimal format.
 
   bin - This will print out the formats in raw binary.
 
@@ -381,7 +386,7 @@ sched_switch
 ------------
 
 This tracer simply records schedule switches. Here's an example
-on how to implement it.
+of how to use it.
 
  # echo sched_switch > /debug/tracing/current_tracer
  # echo 1 > /debug/tracing/tracing_enabled
@@ -470,7 +475,7 @@ interrupt from triggering or the mouse interrupt from letting the
 kernel know of a new mouse event. The result is a latency with the
 reaction time.
 
-The irqsoff tracer tracks the time interrupts are disabled and when
+The irqsoff tracer tracks the time interrupts are disabled to the time
 they are re-enabled. When a new maximum latency is hit, it saves off
 the trace so that it may be retrieved at a later time. Every time a
 new maximum in reached, the old saved trace is discarded and the new
@@ -519,7 +524,7 @@ The difference between the 6 and the displayed timestamp 7us is
 because the clock must have incremented between the time of recording
 the max latency and recording the function that had that latency.
 
-Note the above had ftrace_enabled not set. If we set the ftrace_enabled
+Note the above had ftrace_enabled not set. If we set the ftrace_enabled,
 we get a much larger output:
 
 # tracer: irqsoff
@@ -570,21 +575,21 @@ vim:ft=help
 
 
 Here we traced a 50 microsecond latency. But we also see all the
-functions that were called during that time. Note that enabling
-function tracing we endure an added overhead. This overhead may
-extend the latency times. But never the less, this trace has provided
-some very helpful debugging.
+functions that were called during that time. Note that by enabling
+function tracing, we endure an added overhead. This overhead may
+extend the latency times. But nevertheless, this trace has provided
+some very helpful debugging information.
 
 
 preemptoff
 ----------
 
-When preemption is disabled we may be able to receive interrupts but
-the task can not be preempted and a higher priority task must wait
+When preemption is disabled, we may be able to receive interrupts but
+the task cannot be preempted and a higher priority task must wait
 for preemption to be enabled again before it can preempt a lower
 priority task.
 
-The preemptoff tracer traces the places that disables preemption.
+The preemptoff tracer traces the places that disable preemption.
 Like the irqsoff, it records the maximum latency that preemption
 was disabled. The control of preemptoff is much like the irqsoff.
 
@@ -696,7 +701,7 @@ Notice that the __do_softirq when called doesn't have a preempt_count.
 It may seem that we missed a preempt enabled. What really happened
 is that the preempt count is held on the threads stack and we
 switched to the softirq stack (4K stacks in effect). The code
-does not copy the preempt count, but because interrupts are disabled
+does not copy the preempt count, but because interrupts are disabled,
 we don't need to worry about it. Having a tracer like this is good
 to let people know what really happens inside the kernel.
 
@@ -732,7 +737,7 @@ To record this time, use the preemptirqsoff tracer.
 
 Again, using this trace is much like the irqsoff and preemptoff tracers.
 
- # echo preemptoff > /debug/tracing/current_tracer
+ # echo preemptirqsoff > /debug/tracing/current_tracer
  # echo 0 > /debug/tracing/tracing_max_latency
  # echo 1 > /debug/tracing/tracing_enabled
  # ls -ltr
@@ -862,9 +867,9 @@ This is a very interesting trace. It started with the preemption of
 the ls task. We see that the task had the "need_resched" bit set
 with the 'N' in the trace.  Interrupts are disabled in the spin_lock
 and the trace started. We see that a schedule took place to run
-sshd.  When the interrupts were enabled we took an interrupt.
-On return of the interrupt the softirq ran. We took another interrupt
-while running the softirq as we see with the capital 'H'.
+sshd.  When the interrupts were enabled, we took an interrupt.
+On return from the interrupt handler, the softirq ran. We took another
+interrupt while running the softirq as we see with the capital 'H'.
 
 
 wakeup
@@ -876,9 +881,9 @@ time it executes. This is also known as "schedule latency".
 I stress the point that this is about RT tasks. It is also important
 to know the scheduling latency of non-RT tasks, but the average
 schedule latency is better for non-RT tasks. Tools like
-LatencyTop is more appropriate for such measurements.
+LatencyTop are more appropriate for such measurements.
 
-Real-Time environments is interested in the worst case latency.
+Real-Time environments are interested in the worst case latency.
 That is the longest latency it takes for something to happen, and
 not the average. We can have a very fast scheduler that may only
 have a large latency once in a while, but that would not work well
@@ -889,8 +894,8 @@ tasks that are unpredictable will overwrite the worst case latency
 of RT tasks.
 
 Since this tracer only deals with RT tasks, we will run this slightly
-different than we did with the previous tracers. Instead of performing
-an 'ls' we will run 'sleep 1' under 'chrt' which changes the
+differently than we did with the previous tracers. Instead of performing
+an 'ls', we will run 'sleep 1' under 'chrt' which changes the
 priority of the task.
 
  # echo wakeup > /debug/tracing/current_tracer
@@ -924,9 +929,9 @@ wakeup latency trace v1.1.5 on 2.6.26-rc8
 vim:ft=help
 
 
-Running this on an idle system we see that it only took 4 microseconds
+Running this on an idle system, we see that it only took 4 microseconds
 to perform the task switch.  Note, since the trace marker in the
-schedule is before the actual "switch" we stop the tracing when
+schedule is before the actual "switch", we stop the tracing when
 the recorded task is about to schedule in. This may change if
 we add a new marker at the end of the scheduler.
 
@@ -992,12 +997,15 @@ ksoftirq-7     1d..4   50us : schedule (__cond_resched)
 
 The interrupt went off while running ksoftirqd. This task runs at
 SCHED_OTHER. Why didn't we see the 'N' set early? This may be
-a harmless bug with x86_32 and 4K stacks. The need_reched() function
-that tests if we need to reschedule looks on the actual stack.
-Where as the setting of the NEED_RESCHED bit happens on the
-task's stack. But because we are in a hard interrupt, the test
-is with the interrupts stack which has that to be false. We don't
-see the 'N' until we switch back to the task's stack.
+a harmless bug with x86_32 and 4K stacks. On x86_32 with 4K stacks
+configured, the interrupt and softirq runs with their own stack.
+Some information is held on the top of the task's stack (need_resched
+and preempt_count are both stored there). The setting of the NEED_RESCHED
+bit is done directly to the task's stack, but the reading of the
+NEED_RESCHED is done by looking at the current stack, which in this case
+is the stack for the hard interrupt. This hides the fact that NEED_RESCHED
+has been set. We don't see the 'N' until we switch back to the task's
+assigned stack.
 
 ftrace
 ------
@@ -1067,10 +1075,10 @@ this works is the mcount function call (placed at the start of
 every kernel function, produced by the -pg switch in gcc), starts
 of pointing to a simple return.
 
-When dynamic ftrace is initialized, it calls kstop_machine to make it
-act like a uniprocessor so that it can freely modify code without
-worrying about other processors executing that same code.  At
-initialization, the mcount calls are change to call a "record_ip"
+When dynamic ftrace is initialized, it calls kstop_machine to make
+the machine act like a uniprocessor so that it can freely modify code
+without worrying about other processors executing that same code.  At
+initialization, the mcount calls are changed to call a "record_ip"
 function.  After this, the first time a kernel function is called,
 it has the calling address saved in a hash table.
 
@@ -1085,8 +1093,8 @@ traced, is that we can now selectively choose which functions we
 want to trace and which ones we want the mcount calls to remain as
 nops.
 
-Two files that contain to the enabling and disabling of recorded
-functions are:
+Two files are used, one for enabling and one for disabling the tracing
+of recorded functions. They are:
 
   set_ftrace_filter
 
@@ -1094,7 +1102,7 @@ and
 
   set_ftrace_notrace
 
-A list of available functions that you can add to this files is listed
+A list of available functions that you can add to these files is listed
 in:
 
    available_filter_functions
@@ -1133,9 +1141,9 @@ sys_nanosleep
 
 
 Perhaps this isn't enough. The filters also allow simple wild cards.
-Only the following is currently available
+Only the following are currently available
 
-  <match>*  - will match functions that begins with <match>
+  <match>*  - will match functions that begin with <match>
   *<match>  - will match functions that end with <match>
   *<match>* - will match functions that have <match> in it
 
@@ -1187,7 +1195,7 @@ This is because the '>' and '>>' act just like they do in bash.
 To rewrite the filters, use '>'
 To append to the filters, use '>>'
 
-To clear out a filter so that all functions will be recorded again.
+To clear out a filter so that all functions will be recorded again:
 
  # echo > /debug/tracing/set_ftrace_filter
  # cat /debug/tracing/set_ftrace_filter
@@ -1246,8 +1254,8 @@ ftraced
 
 As mentioned above, when dynamic ftrace is configured in, a kernel
 thread wakes up once a second and checks to see if there are mcount
-calls that need to be converted into nops. If there is not, then
-it simply goes back to sleep. But if there is, it will call
+calls that need to be converted into nops. If there are not any, then
+it simply goes back to sleep. But if there are some, it will call
 kstop_machine to convert the calls to nops.
 
 There may be a case that you do not want this added latency.
@@ -1262,8 +1270,8 @@ mcount calls to nops. Remember that there's a large overhead
 to calling mcount. Without this kernel thread, that overhead will
 exist.
 
-Any write to the ftraced_enabled file will cause the kstop_machine
-to run if there are recorded calls to mcount. This means that a
+If there are recorded calls to mcount, any write to the ftraced_enabled
+file will cause the kstop_machine to run. This means that a
 user can manually perform the updates when they want to by simply
 echoing a '0' into the ftraced_enabled file.
 
@@ -1315,7 +1323,7 @@ trace entries
 
 Having too much or not enough data can be troublesome in diagnosing
 some issue in the kernel. The file trace_entries is used to modify
-the size of the internal trace buffers. The numbers listed
+the size of the internal trace buffers. The number listed
 is the number of entries that can be recorded per CPU. To know
 the full size, multiply the number of possible CPUS with the
 number of entries.
@@ -1323,7 +1331,7 @@ number of entries.
  # cat /debug/tracing/trace_entries
 65620
 
-Note, to modify this you must have tracing fulling disabled. To do that,
+Note, to modify this, you must have tracing completely disabled. To do that,
 echo "none" into the current_tracer.
 
  # echo none > /debug/tracing/current_tracer
@@ -1344,7 +1352,7 @@ it will add them.
 This shows us that 85 entries can fit on a single page.
 
 The number of pages that will be allocated is a percentage of available
-memory. Allocating too much will produces an error.
+memory. Allocating too much will produce an error.
 
  # echo 1000000000000 > /debug/tracing/trace_entries
 -bash: echo: write error: Cannot allocate memory
diff --git a/Documentation/i2c/busses/i2c-i810 b/Documentation/i2c/busses/i2c-i810
deleted file mode 100644
index 778210ee1583..000000000000
--- a/Documentation/i2c/busses/i2c-i810
+++ /dev/null
@@ -1,47 +0,0 @@
-Kernel driver i2c-i810
-
-Supported adapters:
-  * Intel 82810, 82810-DC100, 82810E, and 82815 (GMCH)
-  * Intel 82845G (GMCH)
-
-Authors: 
-        Frodo Looijaard <frodol@dds.nl>, 
-        Philip Edelbrock <phil@netroedge.com>,
-        Kyösti Mälkki <kmalkki@cc.hut.fi>,
-        Ralph Metzler <rjkm@thp.uni-koeln.de>,
-        Mark D. Studebaker <mdsxyz123@yahoo.com>
-
-Main contact: Mark Studebaker <mdsxyz123@yahoo.com>
-
-Description 
------------ 
-
-WARNING: If you have an '810' or '815' motherboard, your standard I2C
-temperature sensors are most likely on the 801's I2C bus. You want the
-i2c-i801 driver for those, not this driver.
-
-Now for the i2c-i810...
-
-The GMCH chip contains two I2C interfaces.
-
-The first interface is used for DDC (Data Display Channel) which is a
-serial channel through the VGA monitor connector to a DDC-compliant
-monitor. This interface is defined by the Video Electronics Standards
-Association (VESA). The standards are available for purchase at
-http://www.vesa.org .
-
-The second interface is a general-purpose I2C bus. It may be connected to a
-TV-out chip such as the BT869 or possibly to a digital flat-panel display.
-
-Features
--------- 
-
-Both busses use the i2c-algo-bit driver for 'bit banging'
-and support for specific transactions is provided by i2c-algo-bit.
-
-Issues
-------
-
-If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1),
-the test may fail; if so, the i2c-i810 driver won't be inserted. However,
-we think this has been fixed.
diff --git a/Documentation/i2c/busses/i2c-prosavage b/Documentation/i2c/busses/i2c-prosavage
deleted file mode 100644
index 703687902511..000000000000
--- a/Documentation/i2c/busses/i2c-prosavage
+++ /dev/null
@@ -1,23 +0,0 @@
-Kernel driver i2c-prosavage
-
-Supported adapters:
-        
-        S3/VIA KM266/VT8375 aka ProSavage8 
-        S3/VIA KM133/VT8365 aka Savage4 
-
-Author: Henk Vergonet <henk@god.dyndns.org>
-
-Description
------------
-
-The Savage4 chips contain two I2C interfaces (aka a I2C 'master' or
-'host'). 
-
-The first interface is used for DDC (Data Display Channel) which is a
-serial channel through the VGA monitor connector to a DDC-compliant
-monitor. This interface is defined by the Video Electronics Standards
-Association (VESA). The standards are available for purchase at
-http://www.vesa.org . The second interface is a general-purpose I2C bus.
-
-Usefull for gaining access to the TV Encoder chips.
-
diff --git a/Documentation/i2c/busses/i2c-savage4 b/Documentation/i2c/busses/i2c-savage4
deleted file mode 100644
index 6ecceab618d3..000000000000
--- a/Documentation/i2c/busses/i2c-savage4
+++ /dev/null
@@ -1,26 +0,0 @@
-Kernel driver i2c-savage4
-
-Supported adapters:
-  * Savage4
-  * Savage2000
-
-Authors: 
-        Alexander Wold <awold@bigfoot.com>,
-        Mark D. Studebaker <mdsxyz123@yahoo.com> 
-
-Description
------------
-
-The Savage4 chips contain two I2C interfaces (aka a I2C 'master'
-or 'host'). 
-
-The first interface is used for DDC (Data Display Channel) which is a
-serial channel through the VGA monitor connector to a DDC-compliant
-monitor. This interface is defined by the Video Electronics Standards
-Association (VESA). The standards are available for purchase at
-http://www.vesa.org . The DDC bus is not yet supported because its register
-is not directly memory-mapped.
-
-The second interface is a general-purpose I2C bus. This is the only
-interface supported by the driver at the moment.
-
diff --git a/Documentation/i2c/fault-codes b/Documentation/i2c/fault-codes
new file mode 100644
index 000000000000..045765c0b9b5
--- /dev/null
+++ b/Documentation/i2c/fault-codes
@@ -0,0 +1,127 @@
+This is a summary of the most important conventions for use of fault
+codes in the I2C/SMBus stack.
+
+
+A "Fault" is not always an "Error"
+----------------------------------
+Not all fault reports imply errors; "page faults" should be a familiar
+example.  Software often retries idempotent operations after transient
+faults.  There may be fancier recovery schemes that are appropriate in
+some cases, such as re-initializing (and maybe resetting).  After such
+recovery, triggered by a fault report, there is no error.
+
+In a similar way, sometimes a "fault" code just reports one defined
+result for an operation ... it doesn't indicate that anything is wrong
+at all, just that the outcome wasn't on the "golden path".
+
+In short, your I2C driver code may need to know these codes in order
+to respond correctly.  Other code may need to rely on YOUR code reporting
+the right fault code, so that it can (in turn) behave correctly.
+
+
+I2C and SMBus fault codes
+-------------------------
+These are returned as negative numbers from most calls, with zero or
+some positive number indicating a non-fault return.  The specific
+numbers associated with these symbols differ between architectures,
+though most Linux systems use <asm-generic/errno*.h> numbering.
+
+Note that the descriptions here are not exhaustive.  There are other
+codes that may be returned, and other cases where these codes should
+be returned.  However, drivers should not return other codes for these
+cases (unless the hardware doesn't provide unique fault reports).
+
+Also, codes returned by adapter probe methods follow rules which are
+specific to their host bus (such as PCI, or the platform bus).
+
+
+EAGAIN
+        Returned by I2C adapters when they lose arbitration in master
+        transmit mode:  some other master was transmitting different
+        data at the same time.
+
+        Also returned when trying to invoke an I2C operation in an
+        atomic context, when some task is already using that I2C bus
+        to execute some other operation.
+
+EBADMSG
+        Returned by SMBus logic when an invalid Packet Error Code byte
+        is received.  This code is a CRC covering all bytes in the
+        transaction, and is sent before the terminating STOP.  This
+        fault is only reported on read transactions; the SMBus slave
+        may have a way to report PEC mismatches on writes from the
+        host.  Note that even if PECs are in use, you should not rely
+        on these as the only way to detect incorrect data transfers.
+
+EBUSY
+        Returned by SMBus adapters when the bus was busy for longer
+        than allowed.  This usually indicates some device (maybe the
+        SMBus adapter) needs some fault recovery (such as resetting),
+        or that the reset was attempted but failed.
+
+EINVAL
+        This rather vague error means an invalid parameter has been
+        detected before any I/O operation was started.  Use a more
+        specific fault code when you can.
+
+        One example would be a driver trying an SMBus Block Write
+        with block size outside the range of 1-32 bytes.
+
+EIO
+        This rather vague error means something went wrong when
+        performing an I/O operation.  Use a more specific fault
+        code when you can.
+
+ENODEV
+        Returned by driver probe() methods.  This is a bit more
+        specific than ENXIO, implying the problem isn't with the
+        address, but with the device found there.  Driver probes
+        may verify the device returns *correct* responses, and
+        return this as appropriate.  (The driver core will warn
+        about probe faults other than ENXIO and ENODEV.)
+
+ENOMEM
+        Returned by any component that can't allocate memory when
+        it needs to do so.
+
+ENXIO
+        Returned by I2C adapters to indicate that the address phase
+        of a transfer didn't get an ACK.  While it might just mean
+        an I2C device was temporarily not responding, usually it
+        means there's nothing listening at that address.
+
+        Returned by driver probe() methods to indicate that they
+        found no device to bind to.  (ENODEV may also be used.)
+
+EOPNOTSUPP
+        Returned by an adapter when asked to perform an operation
+        that it doesn't, or can't, support.
+
+        For example, this would be returned when an adapter that
+        doesn't support SMBus block transfers is asked to execute
+        one.  In that case, the driver making that request should
+        have verified that functionality was supported before it
+        made that block transfer request.
+
+        Similarly, if an I2C adapter can't execute all legal I2C
+        messages, it should return this when asked to perform a
+        transaction it can't.  (These limitations can't be seen in
+        the adapter's functionality mask, since the assumption is
+        that if an adapter supports I2C it supports all of I2C.)
+
+EPROTO
+        Returned when slave does not conform to the relevant I2C
+        or SMBus (or chip-specific) protocol specifications.  One
+        case is when the length of an SMBus block data response
+        (from the SMBus slave) is outside the range 1-32 bytes.
+
+ETIMEDOUT
+        This is returned by drivers when an operation took too much
+        time, and was aborted before it completed.
+
+        SMBus adapters may return it when an operation took more
+        time than allowed by the SMBus specification; for example,
+        when a slave stretches clocks too far.  I2C has no such
+        timeouts, but it's normal for I2C adapters to impose some
+        arbitrary limits (much longer than SMBus!) too.
+
diff --git a/Documentation/i2c/smbus-protocol b/Documentation/i2c/smbus-protocol
index 03f08fb491cc..24bfb65da17d 100644
--- a/Documentation/i2c/smbus-protocol
+++ b/Documentation/i2c/smbus-protocol
@@ -42,8 +42,8 @@ Count (8 bits): A data byte containing the length of a block operation.
 [..]: Data sent by I2C device, as opposed to data sent by the host adapter.
 
 
-SMBus Quick Command:  i2c_smbus_write_quick()
-=============================================
+SMBus Quick Command
+===================
 
 This sends a single bit to the device, at the place of the Rd/Wr bit.
 
diff --git a/Documentation/i2c/writing-clients b/Documentation/i2c/writing-clients
index d4cd4126d1ad..6b61b3a2e90b 100644
--- a/Documentation/i2c/writing-clients
+++ b/Documentation/i2c/writing-clients
@@ -44,6 +44,10 @@ static struct i2c_driver foo_driver = {
         .id_table       = foo_ids,
         .probe          = foo_probe,
         .remove         = foo_remove,
+        /* if device autodetection is needed: */
+        .class          = I2C_CLASS_SOMETHING,
+        .detect         = foo_detect,
+        .address_data   = &addr_data,
 
         /* else, driver uses "legacy" binding model: */
         .attach_adapter = foo_attach_adapter,
@@ -217,6 +221,31 @@ in the I2C bus driver. You may want to save the returned i2c_client
 reference for later use.
 
 
+Device Detection (Standard driver model)
+----------------------------------------
+
+Sometimes you do not know in advance which I2C devices are connected to
+a given I2C bus.  This is for example the case of hardware monitoring
+devices on a PC's SMBus.  In that case, you may want to let your driver
+detect supported devices automatically.  This is how the legacy model
+was working, and is now available as an extension to the standard
+driver model (so that we can finally get rid of the legacy model.)
+
+You simply have to define a detect callback which will attempt to
+identify supported devices (returning 0 for supported ones and -ENODEV
+for unsupported ones), a list of addresses to probe, and a device type
+(or class) so that only I2C buses which may have that type of device
+connected (and not otherwise enumerated) will be probed.  The i2c
+core will then call you back as needed and will instantiate a device
+for you for every successful detection.
+
+Note that this mechanism is purely optional and not suitable for all
+devices.  You need some reliable way to identify the supported devices
+(typically using device-specific, dedicated identification registers),
+otherwise misdetections are likely to occur and things can get wrong
+quickly.
+
+
 Device Deletion (Standard driver model)
 ---------------------------------------
 
@@ -569,7 +598,6 @@ SMBus communication
   in terms of it. Never use this function directly!
 
 
-  extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
   extern s32 i2c_smbus_read_byte(struct i2c_client * client);
   extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
   extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
@@ -578,30 +606,31 @@ SMBus communication
   extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
   extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
                                        u8 command, u16 value);
+  extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
+                                       u8 command, u8 *values);
   extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
                                         u8 command, u8 length,
                                         u8 *values);
   extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
                                            u8 command, u8 length, u8 *values);
-
-These ones were removed in Linux 2.6.10 because they had no users, but could
-be added back later if needed:
-
-  extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
-                                       u8 command, u8 *values);
   extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
                                             u8 command, u8 length,
                                             u8 *values);
+
+These ones were removed from i2c-core because they had no users, but could
+be added back later if needed:
+
+  extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
   extern s32 i2c_smbus_process_call(struct i2c_client * client,
                                     u8 command, u16 value);
   extern s32 i2c_smbus_block_process_call(struct i2c_client *client,
                                           u8 command, u8 length,
                                           u8 *values)
 
-All these transactions return -1 on failure. The 'write' transactions 
-return 0 on success; the 'read' transactions return the read value, except 
-for read_block, which returns the number of values read. The block buffers 
-need not be longer than 32 bytes.
+All these transactions return a negative errno value on failure. The 'write'
+transactions return 0 on success; the 'read' transactions return the read
+value, except for block transactions, which return the number of values
+read. The block buffers need not be longer than 32 bytes.
 
 You can read the file `smbus-protocol' for more information about the
 actual SMBus protocol.
diff --git a/Documentation/ioctl-number.txt b/Documentation/ioctl-number.txt
index 240ce7a56c40..3bb5f466a90d 100644
--- a/Documentation/ioctl-number.txt
+++ b/Documentation/ioctl-number.txt
@@ -117,6 +117,7 @@ Code	Seq#	Include File		Comments
                                         <mailto:natalia@nikhefk.nikhef.nl>
 'c'     00-7F   linux/comstats.h        conflict!
 'c'     00-7F   linux/coda.h            conflict!
+'c'     80-9F   asm-s390/chsc.h
 'd'     00-FF   linux/char/drm/drm/h    conflict!
 'd'     00-DF   linux/video_decoder.h   conflict!
 'd'     F0-FF   linux/digi1.h
diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index b8e52c0355d3..9691c7f5166c 100644
--- a/Documentation/kdump/kdump.txt
+++ b/Documentation/kdump/kdump.txt
@@ -109,7 +109,7 @@ There are two possible methods of using Kdump.
 2) Or use the system kernel binary itself as dump-capture kernel and there is
    no need to build a separate dump-capture kernel. This is possible
    only with the architecutres which support a relocatable kernel. As
-   of today i386 and ia64 architectures support relocatable kernel.
+   of today, i386, x86_64 and ia64 architectures support relocatable kernel.
 
 Building a relocatable kernel is advantageous from the point of view that
 one does not have to build a second kernel for capturing the dump. But
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b52f47d588b4..312fe77764a4 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -271,6 +271,17 @@ and is between 256 and 4096 characters. It is defined in the file
         aic79xx=        [HW,SCSI]
                         See Documentation/scsi/aic79xx.txt.
 
+        amd_iommu=      [HW,X86-84]
+                        Pass parameters to the AMD IOMMU driver in the system.
+                        Possible values are:
+                        isolate - enable device isolation (each device, as far
+                                  as possible, will get its own protection
+                                  domain)
+        amd_iommu_size= [HW,X86-64]
+                        Define the size of the aperture for the AMD IOMMU
+                        driver. Possible values are:
+                        '32M', '64M' (default), '128M', '256M', '512M', '1G'
+
         amijoy.map=     [HW,JOY] Amiga joystick support
                         Map of devices attached to JOY0DAT and JOY1DAT
                         Format: <a>,<b>
@@ -560,6 +571,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
         debug_objects   [KNL] Enable object debugging
 
+        debugpat        [X86] Enable PAT debugging
+
         decnet.addr=    [HW,NET]
                         Format: <area>[,<node>]
                         See also Documentation/networking/decnet.txt.
@@ -599,6 +612,29 @@ and is between 256 and 4096 characters. It is defined in the file
                         See drivers/char/README.epca and
                         Documentation/digiepca.txt.
 
+        disable_mtrr_cleanup [X86]
+        enable_mtrr_cleanup [X86]
+                        The kernel tries to adjust MTRR layout from continuous
+                        to discrete, to make X server driver able to add WB
+                        entry later. This parameter enables/disables that.
+
+        mtrr_chunk_size=nn[KMG] [X86]
+                        used for mtrr cleanup. It is largest continous chunk
+                        that could hold holes aka. UC entries.
+
+        mtrr_gran_size=nn[KMG] [X86]
+                        Used for mtrr cleanup. It is granularity of mtrr block.
+                        Default is 1.
+                        Large value could prevent small alignment from
+                        using up MTRRs.
+
+        mtrr_spare_reg_nr=n [X86]
+                        Format: <integer>
+                        Range: 0,7 : spare reg number
+                        Default : 1
+                        Used for mtrr cleanup. It is spare mtrr entries number.
+                        Set to 2 or more if your graphical card needs more.
+
         disable_mtrr_trim [X86, Intel and AMD only]
                         By default the kernel will trim any uncacheable
                         memory out of your available memory pool based on
@@ -722,9 +758,6 @@ and is between 256 and 4096 characters. It is defined in the file
         hd=             [EIDE] (E)IDE hard drive subsystem geometry
                         Format: <cyl>,<head>,<sect>
 
-        hd?=            [HW] (E)IDE subsystem
-        hd?lun=         See Documentation/ide/ide.txt.
-
         highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact
                         size of <nn>. This works even on boxes that have no
                         highmem otherwise. This also works to reduce highmem
@@ -1208,6 +1241,11 @@ and is between 256 and 4096 characters. It is defined in the file
         mtdparts=       [MTD]
                         See drivers/mtd/cmdlinepart.c.
 
+        mtdset=         [ARM]
+                        ARM/S3C2412 JIVE boot control
+
+                        See arch/arm/mach-s3c2412/mach-jive.c
+
         mtouchusb.raw_coordinates=
                         [HW] Make the MicroTouch USB driver use raw coordinates
                         ('y', default) or cooked coordinates ('n')
@@ -1571,6 +1609,10 @@ and is between 256 and 4096 characters. It is defined in the file
                         Format: { parport<nr> | timid | 0 }
                         See also Documentation/parport.txt.
 
+        pmtmr=          [X86] Manual setup of pmtmr I/O Port. 
+                        Override pmtimer IOPort with a hex value.
+                        e.g. pmtmr=0x508
+
         pnpacpi=        [ACPI]
                         { off }
 
@@ -2116,6 +2158,9 @@ and is between 256 and 4096 characters. It is defined in the file
         usbhid.mousepoll=
                         [USBHID] The interval which mice are to be polled at.
 
+        add_efi_memmap  [EFI; x86-32,X86-64] Include EFI memory map in
+                        kernel's map of available physical RAM.
+
         vdso=           [X86-32,SH,x86-64]
                         vdso=2: enable compat VDSO (default with COMPAT_VDSO)
                         vdso=1: enable VDSO (default)
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 17f1f91af35c..946b66e1b652 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -148,9 +148,9 @@ tcp_available_congestion_control - STRING
         but not loaded.
 
 tcp_base_mss - INTEGER
-        The initial value of search_low to be used by Packetization Layer
-        Path MTU Discovery (MTU probing).  If MTU probing is enabled,
-        this is the inital MSS used by the connection.
+        The initial value of search_low to be used by the packetization layer
+        Path MTU discovery (MTU probing).  If MTU probing is enabled,
+        this is the initial MSS used by the connection.
 
 tcp_congestion_control - STRING
         Set the congestion control algorithm to be used for new
@@ -185,10 +185,9 @@ tcp_frto - INTEGER
         timeouts.  It is particularly beneficial in wireless environments
         where packet loss is typically due to random radio interference
         rather than intermediate router congestion.  F-RTO is sender-side
-        only modification.  Therefore it does not require any support from
-        the peer, but in a typical case, however, where wireless link is
-        the local access link and most of the data flows downlink, the
-        faraway servers should have F-RTO enabled to take advantage of it.
+        only modification. Therefore it does not require any support from
+        the peer.
+
         If set to 1, basic version is enabled.  2 enables SACK enhanced
         F-RTO if flow uses SACK.  The basic version can be used also when
         SACK is in use though scenario(s) with it exists where F-RTO
@@ -276,7 +275,7 @@ tcp_mem - vector of 3 INTEGERs: min, pressure, max
         memory.
 
 tcp_moderate_rcvbuf - BOOLEAN
-        If set, TCP performs receive buffer autotuning, attempting to
+        If set, TCP performs receive buffer auto-tuning, attempting to
         automatically size the buffer (no greater than tcp_rmem[2]) to
         match the size required by the path for full throughput.  Enabled by
         default.
@@ -336,7 +335,7 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
         pressure.
         Default: 8K
 
-        default: default size of receive buffer used by TCP sockets.
+        default: initial size of receive buffer used by TCP sockets.
         This value overrides net.core.rmem_default used by other protocols.
         Default: 87380 bytes. This value results in window of 65535 with
         default setting of tcp_adv_win_scale and tcp_app_win:0 and a bit
@@ -344,8 +343,10 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
 
         max: maximal size of receive buffer allowed for automatically
         selected receiver buffers for TCP socket. This value does not override
-        net.core.rmem_max, "static" selection via SO_RCVBUF does not use this.
-        Default: 87380*2 bytes.
+        net.core.rmem_max.  Calling setsockopt() with SO_RCVBUF disables
+        automatic tuning of that socket's receive buffer size, in which
+        case this value is ignored.
+        Default: between 87380B and 4MB, depending on RAM size.
 
 tcp_sack - BOOLEAN
         Enable select acknowledgments (SACKS).
@@ -358,7 +359,7 @@ tcp_slow_start_after_idle - BOOLEAN
         Default: 1
 
 tcp_stdurg - BOOLEAN
-        Use the Host requirements interpretation of the TCP urg pointer field.
+        Use the Host requirements interpretation of the TCP urgent pointer field.
         Most hosts use the older BSD interpretation, so if you turn this on
         Linux might not communicate correctly with them.
         Default: FALSE
@@ -371,12 +372,12 @@ tcp_synack_retries - INTEGER
 tcp_syncookies - BOOLEAN
         Only valid when the kernel was compiled with CONFIG_SYNCOOKIES
         Send out syncookies when the syn backlog queue of a socket
-        overflows. This is to prevent against the common 'syn flood attack'
+        overflows. This is to prevent against the common 'SYN flood attack'
         Default: FALSE
 
         Note, that syncookies is fallback facility.
         It MUST NOT be used to help highly loaded servers to stand
-        against legal connection rate. If you see synflood warnings
+        against legal connection rate. If you see SYN flood warnings
         in your logs, but investigation shows that they occur
         because of overload with legal connections, you should tune
         another parameters until this warning disappear.
@@ -386,7 +387,7 @@ tcp_syncookies - BOOLEAN
         to use TCP extensions, can result in serious degradation
         of some services (f.e. SMTP relaying), visible not by you,
         but your clients and relays, contacting you. While you see
-        synflood warnings in logs not being really flooded, your server
+        SYN flood warnings in logs not being really flooded, your server
         is seriously misconfigured.
 
 tcp_syn_retries - INTEGER
@@ -419,19 +420,21 @@ tcp_window_scaling - BOOLEAN
         Enable window scaling as defined in RFC1323.
 
 tcp_wmem - vector of 3 INTEGERs: min, default, max
-        min: Amount of memory reserved for send buffers for TCP socket.
+        min: Amount of memory reserved for send buffers for TCP sockets.
         Each TCP socket has rights to use it due to fact of its birth.
         Default: 4K
 
-        default: Amount of memory allowed for send buffers for TCP socket
-        by default. This value overrides net.core.wmem_default used
-        by other protocols, it is usually lower than net.core.wmem_default.
+        default: initial size of send buffer used by TCP sockets.  This
+        value overrides net.core.wmem_default used by other protocols.
+        It is usually lower than net.core.wmem_default.
         Default: 16K
 
-        max: Maximal amount of memory allowed for automatically selected
-        send buffers for TCP socket. This value does not override
-        net.core.wmem_max, "static" selection via SO_SNDBUF does not use this.
-        Default: 128K
+        max: Maximal amount of memory allowed for automatically tuned
+        send buffers for TCP sockets. This value does not override
+        net.core.wmem_max.  Calling setsockopt() with SO_SNDBUF disables
+        automatic tuning of that socket's send buffer size, in which case
+        this value is ignored.
+        Default: between 64K and 4MB, depending on RAM size.
 
 tcp_workaround_signed_windows - BOOLEAN
         If set, assume no receipt of a window scaling option means the
@@ -1060,24 +1063,193 @@ bridge-nf-filter-pppoe-tagged - BOOLEAN
         Default: 1
 
 
-UNDOCUMENTED:
+proc/sys/net/sctp/* Variables:
+
+addip_enable - BOOLEAN
+        Enable or disable extension of  Dynamic Address Reconfiguration
+        (ADD-IP) functionality specified in RFC5061.  This extension provides
+        the ability to dynamically add and remove new addresses for the SCTP
+        associations.
+
+        1: Enable extension.
+
+        0: Disable extension.
+
+        Default: 0
+
+addip_noauth_enable - BOOLEAN
+        Dynamic Address Reconfiguration (ADD-IP) requires the use of
+        authentication to protect the operations of adding or removing new
+        addresses.  This requirement is mandated so that unauthorized hosts
+        would not be able to hijack associations.  However, older
+        implementations may not have implemented this requirement while
+        allowing the ADD-IP extension.  For reasons of interoperability,
+        we provide this variable to control the enforcement of the
+        authentication requirement.
+
+        1: Allow ADD-IP extension to be used without authentication.  This
+           should only be set in a closed environment for interoperability
+           with older implementations.
+
+        0: Enforce the authentication requirement
+
+        Default: 0
+
+auth_enable - BOOLEAN
+        Enable or disable Authenticated Chunks extension.  This extension
+        provides the ability to send and receive authenticated chunks and is
+        required for secure operation of Dynamic Address Reconfiguration
+        (ADD-IP) extension.
+
+        1: Enable this extension.
+        0: Disable this extension.
+
+        Default: 0
+
+prsctp_enable - BOOLEAN
+        Enable or disable the Partial Reliability extension (RFC3758) which
+        is used to notify peers that a given DATA should no longer be expected.
+
+        1: Enable extension
+        0: Disable
+
+        Default: 1
+
+max_burst - INTEGER
+        The limit of the number of new packets that can be initially sent.  It
+        controls how bursty the generated traffic can be.
+
+        Default: 4
+
+association_max_retrans - INTEGER
+        Set the maximum number for retransmissions that an association can
+        attempt deciding that the remote end is unreachable.  If this value
+        is exceeded, the association is terminated.
+
+        Default: 10
+
+max_init_retransmits - INTEGER
+        The maximum number of retransmissions of INIT and COOKIE-ECHO chunks
+        that an association will attempt before declaring the destination
+        unreachable and terminating.
+
+        Default: 8
+
+path_max_retrans - INTEGER
+        The maximum number of retransmissions that will be attempted on a given
+        path.  Once this threshold is exceeded, the path is considered
+        unreachable, and new traffic will use a different path when the
+        association is multihomed.
+
+        Default: 5
+
+rto_initial - INTEGER
+        The initial round trip timeout value in milliseconds that will be used
+        in calculating round trip times.  This is the initial time interval
+        for retransmissions.
+
+        Default: 3000
 
-dev_weight FIXME
-discovery_slots FIXME
-discovery_timeout FIXME
-fast_poll_increase FIXME
-ip6_queue_maxlen FIXME
-lap_keepalive_time FIXME
-lo_cong FIXME
-max_baud_rate FIXME
-max_dgram_qlen FIXME
-max_noreply_time FIXME
-max_tx_data_size FIXME
-max_tx_window FIXME
-min_tx_turn_time FIXME
-mod_cong FIXME
-no_cong FIXME
-no_cong_thresh FIXME
-slot_timeout FIXME
-warn_noreply_time FIXME
+rto_max - INTEGER
+        The maximum value (in milliseconds) of the round trip timeout.  This
+        is the largest time interval that can elapse between retransmissions.
+
+        Default: 60000
+
+rto_min - INTEGER
+        The minimum value (in milliseconds) of the round trip timeout.  This
+        is the smallest time interval the can elapse between retransmissions.
+
+        Default: 1000
+
+hb_interval - INTEGER
+        The interval (in milliseconds) between HEARTBEAT chunks.  These chunks
+        are sent at the specified interval on idle paths to probe the state of
+        a given path between 2 associations.
+
+        Default: 30000
+
+sack_timeout - INTEGER
+        The amount of time (in milliseconds) that the implementation will wait
+        to send a SACK.
+
+        Default: 200
+
+valid_cookie_life - INTEGER
+        The default lifetime of the SCTP cookie (in milliseconds).  The cookie
+        is used during association establishment.
+
+        Default: 60000
+
+cookie_preserve_enable - BOOLEAN
+        Enable or disable the ability to extend the lifetime of the SCTP cookie
+        that is used during the establishment phase of SCTP association
+
+        1: Enable cookie lifetime extension.
+        0: Disable
+
+        Default: 1
+
+rcvbuf_policy - INTEGER
+        Determines if the receive buffer is attributed to the socket or to
+        association.   SCTP supports the capability to create multiple
+        associations on a single socket.  When using this capability, it is
+        possible that a single stalled association that's buffering a lot
+        of data may block other associations from delivering their data by
+        consuming all of the receive buffer space.  To work around this,
+        the rcvbuf_policy could be set to attribute the receiver buffer space
+        to each association instead of the socket.  This prevents the described
+        blocking.
+
+        1: rcvbuf space is per association
+        0: recbuf space is per socket
+
+        Default: 0
+
+sndbuf_policy - INTEGER
+        Similar to rcvbuf_policy above, this applies to send buffer space.
+
+        1: Send buffer is tracked per association
+        0: Send buffer is tracked per socket.
+
+        Default: 0
+
+sctp_mem - vector of 3 INTEGERs: min, pressure, max
+        Number of pages allowed for queueing by all SCTP sockets.
+
+        min: Below this number of pages SCTP is not bothered about its
+        memory appetite. When amount of memory allocated by SCTP exceeds
+        this number, SCTP starts to moderate memory usage.
+
+        pressure: This value was introduced to follow format of tcp_mem.
+
+        max: Number of pages allowed for queueing by all SCTP sockets.
+
+        Default is calculated at boot time from amount of available memory.
+
+sctp_rmem - vector of 3 INTEGERs: min, default, max
+        See tcp_rmem for a description.
+
+sctp_wmem  - vector of 3 INTEGERs: min, default, max
+        See tcp_wmem for a description.
+
+UNDOCUMENTED:
 
+/proc/sys/net/core/*
+        dev_weight FIXME
+
+/proc/sys/net/unix/*
+        max_dgram_qlen FIXME
+
+/proc/sys/net/irda/*
+        fast_poll_increase FIXME
+        warn_noreply_time FIXME
+        discovery_slots FIXME
+        slot_timeout FIXME
+        max_baud_rate FIXME
+        discovery_timeout FIXME
+        lap_keepalive_time FIXME
+        max_noreply_time FIXME
+        max_tx_data_size FIXME
+        max_tx_window FIXME
+        min_tx_turn_time FIXME
diff --git a/Documentation/nmi_watchdog.txt b/Documentation/nmi_watchdog.txt
index 757c729ee42e..90aa4531cb67 100644
--- a/Documentation/nmi_watchdog.txt
+++ b/Documentation/nmi_watchdog.txt
@@ -10,7 +10,7 @@ us to generate 'watchdog NMI interrupts'.  (NMI: Non Maskable Interrupt
 which get executed even if the system is otherwise locked up hard).
 This can be used to debug hard kernel lockups.  By executing periodic
 NMI interrupts, the kernel can monitor whether any CPU has locked up,
-and print out debugging messages if so.  
+and print out debugging messages if so.
 
 In order to use the NMI watchdog, you need to have APIC support in your
 kernel. For SMP kernels, APIC support gets compiled in automatically. For
@@ -22,8 +22,7 @@ CONFIG_X86_UP_IOAPIC is for uniprocessor with an IO-APIC. [Note: certain
 kernel debugging options, such as Kernel Stack Meter or Kernel Tracer,
 may implicitly disable the NMI watchdog.]
 
-For x86-64, the needed APIC is always compiled in, and the NMI watchdog is
-always enabled with I/O-APIC mode (nmi_watchdog=1).
+For x86-64, the needed APIC is always compiled in.
 
 Using local APIC (nmi_watchdog=2) needs the first performance register, so
 you can't use it for other purposes (such as high precision performance
@@ -63,16 +62,15 @@ when the system is idle), but if your system locks up on anything but the
 "hlt", then you are out of luck -- the event will not happen at all and the
 watchdog won't trigger. This is a shortcoming of the local APIC watchdog
 -- unfortunately there is no "clock ticks" event that would work all the
-time. The I/O APIC watchdog is driven externally and has no such shortcoming.  
+time. The I/O APIC watchdog is driven externally and has no such shortcoming.
 But its NMI frequency is much higher, resulting in a more significant hit
 to the overall system performance.
 
-NOTE: starting with 2.4.2-ac18 the NMI-oopser is disabled by default,
-you have to enable it with a boot time parameter.  Prior to 2.4.2-ac18
-the NMI-oopser is enabled unconditionally on x86 SMP boxes.
+On x86 nmi_watchdog is disabled by default so you have to enable it with
+a boot time parameter.
 
-On x86-64 the NMI oopser is on by default. On 64bit Intel CPUs
-it uses IO-APIC by default and on AMD it uses local APIC.
+NOTE: In kernels prior to 2.4.2-ac18 the NMI-oopser is enabled unconditionally
+on x86 SMP boxes.
 
 [ feel free to send bug reports, suggestions and patches to
   Ingo Molnar <mingo@redhat.com> or the Linux SMP mailing
diff --git a/Documentation/scheduler/sched-domains.txt b/Documentation/scheduler/sched-domains.txt
index a9e990ab980f..373ceacc367e 100644
--- a/Documentation/scheduler/sched-domains.txt
+++ b/Documentation/scheduler/sched-domains.txt
@@ -61,10 +61,7 @@ builder by #define'ing ARCH_HASH_SCHED_DOMAIN, and exporting your
 arch_init_sched_domains function. This function will attach domains to all
 CPUs using cpu_attach_domain.
 
-Implementors should change the line
-#undef SCHED_DOMAIN_DEBUG
-to
-#define SCHED_DOMAIN_DEBUG
-in kernel/sched.c as this enables an error checking parse of the sched domains
+The sched-domains debugging infrastructure can be enabled by enabling
+CONFIG_SCHED_DEBUG. This enables an error checking parse of the sched domains
 which should catch most possible errors (described above). It also prints out
 the domain structure in a visual format.
diff --git a/Documentation/scheduler/sched-rt-group.txt b/Documentation/scheduler/sched-rt-group.txt
index 14f901f639ee..3ef339f491e0 100644
--- a/Documentation/scheduler/sched-rt-group.txt
+++ b/Documentation/scheduler/sched-rt-group.txt
@@ -51,9 +51,9 @@ needs only about 3% CPU time to do so, it can do with a 0.03 * 0.005s =
 0.00015s. So this group can be scheduled with a period of 0.005s and a run time
 of 0.00015s.
 
-The remaining CPU time will be used for user input and other tass. Because
+The remaining CPU time will be used for user input and other tasks. Because
 realtime tasks have explicitly allocated the CPU time they need to perform
-their tasks, buffer underruns in the graphocs or audio can be eliminated.
+their tasks, buffer underruns in the graphics or audio can be eliminated.
 
 NOTE: the above example is not fully implemented as of yet (2.6.25). We still
 lack an EDF scheduler to make non-uniform periods usable.
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 0bbee38acd26..72aff61e7315 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -753,8 +753,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
 
     [Multiple options for each card instance]
     model       - force the model name
-    position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
+    position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF)
     probe_mask  - Bitmask to probe codecs (default = -1, meaning all slots)
+    bdl_pos_adj - Specifies the DMA IRQ timing delay in samples.
+                Passing -1 will make the driver to choose the appropriate
+                value based on the controller chip.
     
     [Single (global) options]
     single_cmd  - Use single immediate commands to communicate with
@@ -845,7 +848,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
         ALC269
           basic         Basic preset
 
-        ALC662
+        ALC662/663
           3stack-dig    3-stack (2-channel) with SPDIF
           3stack-6ch     3-stack (6-channel)
           3stack-6ch-dig 3-stack (6-channel) with SPDIF
@@ -853,6 +856,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
           lenovo-101e    Lenovo laptop
           eeepc-p701    ASUS Eeepc P701
           eeepc-ep20    ASUS Eeepc EP20
+          m51va         ASUS M51VA
+          g71v          ASUS G71V
+          h13           ASUS H13
+          g50v          ASUS G50V
           auto          auto-config reading BIOS (default)
 
         ALC882/885
@@ -1091,7 +1098,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     This occurs when the access to non-existing or non-working codec slot
     (likely a modem one) causes a stall of the communication via HD-audio
     bus.  You can see which codec slots are probed by enabling
-    CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
+    CONFIG_SND_DEBUG_VERBOSE, or simply from the file name of the codec
     proc files.  Then limit the slots to probe by probe_mask option.
     For example, probe_mask=1 means to probe only the first slot, and
     probe_mask=4 means only the third slot.
@@ -2267,6 +2274,10 @@ case above again, the first two slots are already reserved.  If any
 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
 snd-ens1371, it will be assigned to the third or later slot.
 
+When a module name is given with '!', the slot will be given for any
+modules but that name.  For example, "slots=!snd-pcsp" will reserve
+the first slot for any modules but snd-pcsp. 
+
 
 ALSA PCM devices to OSS devices mapping
 =======================================
diff --git a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
index b03df4d4795c..e13c4e67029f 100644
--- a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
+++ b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
@@ -6127,8 +6127,8 @@ struct _snd_pcm_runtime {
 
       <para>
         <function>snd_printdd()</function> is compiled in only when
-      <constant>CONFIG_SND_DEBUG_DETECT</constant> is set. Please note
-      that <constant>DEBUG_DETECT</constant> is not set as default
+      <constant>CONFIG_SND_DEBUG_VERBOSE</constant> is set. Please note
+      that <constant>CONFIG_SND_DEBUG_VERBOSE</constant> is not set as default
       even if you configure the alsa-driver with
       <option>--with-debug=full</option> option. You need to give
       explicitly <option>--with-debug=detect</option> option instead. 
diff --git a/Documentation/tracers/mmiotrace.txt b/Documentation/tracers/mmiotrace.txt
new file mode 100644
index 000000000000..a4afb560a45b
--- /dev/null
+++ b/Documentation/tracers/mmiotrace.txt
@@ -0,0 +1,164 @@
+                In-kernel memory-mapped I/O tracing
+
+
+Home page and links to optional user space tools:
+
+        http://nouveau.freedesktop.org/wiki/MmioTrace
+
+MMIO tracing was originally developed by Intel around 2003 for their Fault
+Injection Test Harness. In Dec 2006 - Jan 2007, using the code from Intel,
+Jeff Muizelaar created a tool for tracing MMIO accesses with the Nouveau
+project in mind. Since then many people have contributed.
+
+Mmiotrace was built for reverse engineering any memory-mapped IO device with
+the Nouveau project as the first real user. Only x86 and x86_64 architectures
+are supported.
+
+Out-of-tree mmiotrace was originally modified for mainline inclusion and
+ftrace framework by Pekka Paalanen <pq@iki.fi>.
+
+
+Preparation
+-----------
+
+Mmiotrace feature is compiled in by the CONFIG_MMIOTRACE option. Tracing is
+disabled by default, so it is safe to have this set to yes. SMP systems are
+supported, but tracing is unreliable and may miss events if more than one CPU
+is on-line, therefore mmiotrace takes all but one CPU off-line during run-time
+activation. You can re-enable CPUs by hand, but you have been warned, there
+is no way to automatically detect if you are losing events due to CPUs racing.
+
+
+Usage Quick Reference
+---------------------
+
+$ mount -t debugfs debugfs /debug
+$ echo mmiotrace > /debug/tracing/current_tracer
+$ cat /debug/tracing/trace_pipe > mydump.txt &
+Start X or whatever.
+$ echo "X is up" > /debug/tracing/marker
+$ echo none > /debug/tracing/current_tracer
+Check for lost events.
+
+
+Usage
+-----
+
+Make sure debugfs is mounted to /debug. If not, (requires root privileges)
+$ mount -t debugfs debugfs /debug
+
+Check that the driver you are about to trace is not loaded.
+
+Activate mmiotrace (requires root privileges):
+$ echo mmiotrace > /debug/tracing/current_tracer
+
+Start storing the trace:
+$ cat /debug/tracing/trace_pipe > mydump.txt &
+The 'cat' process should stay running (sleeping) in the background.
+
+Load the driver you want to trace and use it. Mmiotrace will only catch MMIO
+accesses to areas that are ioremapped while mmiotrace is active.
+
+[Unimplemented feature:]
+During tracing you can place comments (markers) into the trace by
+$ echo "X is up" > /debug/tracing/marker
+This makes it easier to see which part of the (huge) trace corresponds to
+which action. It is recommended to place descriptive markers about what you
+do.
+
+Shut down mmiotrace (requires root privileges):
+$ echo none > /debug/tracing/current_tracer
+The 'cat' process exits. If it does not, kill it by issuing 'fg' command and
+pressing ctrl+c.
+
+Check that mmiotrace did not lose events due to a buffer filling up. Either
+$ grep -i lost mydump.txt
+which tells you exactly how many events were lost, or use
+$ dmesg
+to view your kernel log and look for "mmiotrace has lost events" warning. If
+events were lost, the trace is incomplete. You should enlarge the buffers and
+try again. Buffers are enlarged by first seeing how large the current buffers
+are:
+$ cat /debug/tracing/trace_entries
+gives you a number. Approximately double this number and write it back, for
+instance:
+$ echo 128000 > /debug/tracing/trace_entries
+Then start again from the top.
+
+If you are doing a trace for a driver project, e.g. Nouveau, you should also
+do the following before sending your results:
+$ lspci -vvv > lspci.txt
+$ dmesg > dmesg.txt
+$ tar zcf pciid-nick-mmiotrace.tar.gz mydump.txt lspci.txt dmesg.txt
+and then send the .tar.gz file. The trace compresses considerably. Replace
+"pciid" and "nick" with the PCI ID or model name of your piece of hardware
+under investigation and your nick name.
+
+
+How Mmiotrace Works
+-------------------
+
+Access to hardware IO-memory is gained by mapping addresses from PCI bus by
+calling one of the ioremap_*() functions. Mmiotrace is hooked into the
+__ioremap() function and gets called whenever a mapping is created. Mapping is
+an event that is recorded into the trace log. Note, that ISA range mappings
+are not caught, since the mapping always exists and is returned directly.
+
+MMIO accesses are recorded via page faults. Just before __ioremap() returns,
+the mapped pages are marked as not present. Any access to the pages causes a
+fault. The page fault handler calls mmiotrace to handle the fault. Mmiotrace
+marks the page present, sets TF flag to achieve single stepping and exits the
+fault handler. The instruction that faulted is executed and debug trap is
+entered. Here mmiotrace again marks the page as not present. The instruction
+is decoded to get the type of operation (read/write), data width and the value
+read or written. These are stored to the trace log.
+
+Setting the page present in the page fault handler has a race condition on SMP
+machines. During the single stepping other CPUs may run freely on that page
+and events can be missed without a notice. Re-enabling other CPUs during
+tracing is discouraged.
+
+
+Trace Log Format
+----------------
+
+The raw log is text and easily filtered with e.g. grep and awk. One record is
+one line in the log. A record starts with a keyword, followed by keyword
+dependant arguments. Arguments are separated by a space, or continue until the
+end of line. The format for version 20070824 is as follows:
+
+Explanation     Keyword Space separated arguments
+---------------------------------------------------------------------------
+
+read event      R       width, timestamp, map id, physical, value, PC, PID
+write event     W       width, timestamp, map id, physical, value, PC, PID
+ioremap event   MAP     timestamp, map id, physical, virtual, length, PC, PID
+iounmap event   UNMAP   timestamp, map id, PC, PID
+marker          MARK    timestamp, text
+version         VERSION the string "20070824"
+info for reader LSPCI   one line from lspci -v
+PCI address map PCIDEV  space separated /proc/bus/pci/devices data
+unk. opcode     UNKNOWN timestamp, map id, physical, data, PC, PID
+
+Timestamp is in seconds with decimals. Physical is a PCI bus address, virtual
+is a kernel virtual address. Width is the data width in bytes and value is the
+data value. Map id is an arbitrary id number identifying the mapping that was
+used in an operation. PC is the program counter and PID is process id. PC is
+zero if it is not recorded. PID is always zero as tracing MMIO accesses
+originating in user space memory is not yet supported.
+
+For instance, the following awk filter will pass all 32-bit writes that target
+physical addresses in the range [0xfb73ce40, 0xfb800000[
+
+$ awk '/W 4 / { adr=strtonum($5); if (adr >= 0xfb73ce40 &&
+adr < 0xfb800000) print; }'
+
+
+Tools for Developers
+--------------------
+
+The user space tools include utilities for:
+- replacing numeric addresses and values with hardware register names
+- replaying MMIO logs, i.e., re-executing the recorded writes
+
+
diff --git a/Documentation/i386/IO-APIC.txt b/Documentation/x86/i386/IO-APIC.txt
index 30b4c714fbe1..30b4c714fbe1 100644
--- a/Documentation/i386/IO-APIC.txt
+++ b/Documentation/x86/i386/IO-APIC.txt
diff --git a/Documentation/i386/boot.txt b/Documentation/x86/i386/boot.txt
index 95ad15c3b01f..147bfe511cdd 100644
--- a/Documentation/i386/boot.txt
+++ b/Documentation/x86/i386/boot.txt
@@ -1,17 +1,14 @@
-                     THE LINUX/I386 BOOT PROTOCOL
-                     ----------------------------
+                     THE LINUX/x86 BOOT PROTOCOL
+                     ---------------------------
 
-                    H. Peter Anvin <hpa@zytor.com>
-                        Last update 2007-05-23
-
-On the i386 platform, the Linux kernel uses a rather complicated boot
+On the x86 platform, the Linux kernel uses a rather complicated boot
 convention.  This has evolved partially due to historical aspects, as
 well as the desire in the early days to have the kernel itself be a
 bootable image, the complicated PC memory model and due to changed
 expectations in the PC industry caused by the effective demise of
 real-mode DOS as a mainstream operating system.
 
-Currently, the following versions of the Linux/i386 boot protocol exist.
+Currently, the following versions of the Linux/x86 boot protocol exist.
 
 Old kernels:    zImage/Image support only.  Some very early kernels
                 may not even support a command line.
@@ -372,10 +369,17 @@ Protocol:	2.00+
         - If 0, the protected-mode code is loaded at 0x10000.
         - If 1, the protected-mode code is loaded at 0x100000.
 
+  Bit 5 (write): QUIET_FLAG
+        - If 0, print early messages.
+        - If 1, suppress early messages.
+                This requests to the kernel (decompressor and early
+                kernel) to not write early messages that require
+                accessing the display hardware directly.
+
   Bit 6 (write): KEEP_SEGMENTS
         Protocol: 2.07+
-        - if 0, reload the segment registers in the 32bit entry point.
-        - if 1, do not reload the segment registers in the 32bit entry point.
+        - If 0, reload the segment registers in the 32bit entry point.
+        - If 1, do not reload the segment registers in the 32bit entry point.
                 Assume that %cs %ds %ss %es are all set to flat segments with
                 a base of 0 (or the equivalent for their environment).
 
@@ -504,7 +508,7 @@ Protocol:	2.06+
   maximum size was 255.
 
 Field name:     hardware_subarch
-Type:           write
+Type:           write (optional, defaults to x86/PC)
 Offset/size:    0x23c/4
 Protocol:       2.07+
 
@@ -520,11 +524,13 @@ Protocol:	2.07+
   0x00000002    Xen
 
 Field name:     hardware_subarch_data
-Type:           write
+Type:           write (subarch-dependent)
 Offset/size:    0x240/8
 Protocol:       2.07+
 
   A pointer to data that is specific to hardware subarch
+  This field is currently unused for the default x86/PC environment,
+  do not modify.
 
 Field name:     payload_offset
 Type:           read
@@ -545,6 +551,34 @@ Protocol:	2.08+
 
   The length of the payload.
 
+Field name:     setup_data
+Type:           write (special)
+Offset/size:    0x250/8
+Protocol:       2.09+
+
+  The 64-bit physical pointer to NULL terminated single linked list of
+  struct setup_data. This is used to define a more extensible boot
+  parameters passing mechanism. The definition of struct setup_data is
+  as follow:
+
+  struct setup_data {
+          u64 next;
+          u32 type;
+          u32 len;
+          u8  data[0];
+  };
+
+  Where, the next is a 64-bit physical pointer to the next node of
+  linked list, the next field of the last node is 0; the type is used
+  to identify the contents of data; the len is the length of data
+  field; the data holds the real payload.
+
+  This list may be modified at a number of points during the bootup
+  process.  Therefore, when modifying this list one should always make
+  sure to consider the case where the linked list already contains
+  entries.
+
+
 **** THE IMAGE CHECKSUM
 
 From boot protocol version 2.08 onwards the CRC-32 is calculated over
@@ -553,6 +587,7 @@ initial remainder of 0xffffffff.  The checksum is appended to the
 file; therefore the CRC of the file up to the limit specified in the
 syssize field of the header is always 0.
 
+
 **** THE KERNEL COMMAND LINE
 
 The kernel command line has become an important way for the boot
@@ -584,28 +619,6 @@ command line is entered using the following protocol:
         covered by setup_move_size, so you may need to adjust this
         field.
 
-Field name:     setup_data
-Type:           write (obligatory)
-Offset/size:    0x250/8
-Protocol:       2.09+
-
-  The 64-bit physical pointer to NULL terminated single linked list of
-  struct setup_data. This is used to define a more extensible boot
-  parameters passing mechanism. The definition of struct setup_data is
-  as follow:
-
-  struct setup_data {
-          u64 next;
-          u32 type;
-          u32 len;
-          u8  data[0];
-  };
-
-  Where, the next is a 64-bit physical pointer to the next node of
-  linked list, the next field of the last node is 0; the type is used
-  to identify the contents of data; the len is the length of data
-  field; the data holds the real payload.
-
 
 **** MEMORY LAYOUT OF THE REAL-MODE CODE
 
diff --git a/Documentation/i386/usb-legacy-support.txt b/Documentation/x86/i386/usb-legacy-support.txt
index 1894cdfc69d9..1894cdfc69d9 100644
--- a/Documentation/i386/usb-legacy-support.txt
+++ b/Documentation/x86/i386/usb-legacy-support.txt
diff --git a/Documentation/i386/zero-page.txt b/Documentation/x86/i386/zero-page.txt
index 169ad423a3d1..169ad423a3d1 100644
--- a/Documentation/i386/zero-page.txt
+++ b/Documentation/x86/i386/zero-page.txt
diff --git a/Documentation/x86_64/00-INDEX b/Documentation/x86/x86_64/00-INDEX
index 92fc20ab5f0e..92fc20ab5f0e 100644
--- a/Documentation/x86_64/00-INDEX
+++ b/Documentation/x86/x86_64/00-INDEX
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86/x86_64/boot-options.txt
index b0c7b6c4abda..b0c7b6c4abda 100644
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86/x86_64/boot-options.txt
diff --git a/Documentation/x86_64/cpu-hotplug-spec b/Documentation/x86/x86_64/cpu-hotplug-spec
index 3c23e0587db3..3c23e0587db3 100644
--- a/Documentation/x86_64/cpu-hotplug-spec
+++ b/Documentation/x86/x86_64/cpu-hotplug-spec
diff --git a/Documentation/x86_64/fake-numa-for-cpusets b/Documentation/x86/x86_64/fake-numa-for-cpusets
index d1a985c5b00a..d1a985c5b00a 100644
--- a/Documentation/x86_64/fake-numa-for-cpusets
+++ b/Documentation/x86/x86_64/fake-numa-for-cpusets
diff --git a/Documentation/x86_64/kernel-stacks b/Documentation/x86/x86_64/kernel-stacks
index 5ad65d51fb95..5ad65d51fb95 100644
--- a/Documentation/x86_64/kernel-stacks
+++ b/Documentation/x86/x86_64/kernel-stacks
diff --git a/Documentation/x86_64/machinecheck b/Documentation/x86/x86_64/machinecheck
index a05e58e7b159..a05e58e7b159 100644
--- a/Documentation/x86_64/machinecheck
+++ b/Documentation/x86/x86_64/machinecheck
diff --git a/Documentation/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt
index b89b6d2bebfa..efce75097369 100644
--- a/Documentation/x86_64/mm.txt
+++ b/Documentation/x86/x86_64/mm.txt
@@ -11,9 +11,8 @@ ffffc10000000000 - ffffc1ffffffffff (=40 bits) hole
 ffffc20000000000 - ffffe1ffffffffff (=45 bits) vmalloc/ioremap space
 ffffe20000000000 - ffffe2ffffffffff (=40 bits) virtual memory map (1TB)
 ... unused hole ...
-ffffffff80000000 - ffffffff82800000 (=40 MB)   kernel text mapping, from phys 0
-... unused hole ...
-ffffffff88000000 - fffffffffff00000 (=1919 MB) module mapping space
+ffffffff80000000 - ffffffffa0000000 (=512 MB)  kernel text mapping, from phys 0
+ffffffffa0000000 - fffffffffff00000 (=1536 MB) module mapping space
 
 The direct mapping covers all memory in the system up to the highest
 memory address (this means in some cases it can also include PCI memory
diff --git a/Documentation/x86_64/uefi.txt b/Documentation/x86/x86_64/uefi.txt
index 7d77120a5184..a5e2b4fdb170 100644
--- a/Documentation/x86_64/uefi.txt
+++ b/Documentation/x86/x86_64/uefi.txt
@@ -36,3 +36,7 @@ Mechanics:
   services.
         noefi           turn off all EFI runtime services
         reboot_type=k   turn off EFI reboot runtime service
+- If the EFI memory map has additional entries not in the E820 map,
+  you can include those entries in the kernels memory map of available
+  physical RAM by using the following kernel command line parameter.
+        add_efi_memmap  include EFI memory map of available physical RAM