Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes:
  docbook: make cleandocs
  kbuild: fix spurious initramfs rebuild
  Documentation: explain the difference between __bitwise and __bitwise__
  kbuild: make it possible for the linker to discard local symbols from vmlinux
  kbuild: remove pointless strdup() on arguments passed to new_module() in modpost
  kbuild: fix a few typos in top-level Makefile
  kbuild: introduce destination-y for exported headers
  kbuild: use git svn instead of git-svn in setlocalversion
  kconfig: fix update-po-config to accect backslash in input
  kbuild: fix option processing for -I in headerdep

11 files changed, 116 insertions, 18 deletions

diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile
index a3a83d38f96f..8918a32c6b3a 100644
--- a/Documentation/DocBook/Makefile
+++ b/Documentation/DocBook/Makefile
@@ -31,7 +31,7 @@ PS_METHOD	= $(prefer-db2x)
 
 ###
 # The targets that may be used.
-PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
+PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs
 
 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
 xmldocs: $(BOOKS)
@@ -213,11 +213,12 @@ silent_gen_xml = :
 dochelp:
         @echo  ' Linux kernel internal documentation in different formats:'
         @echo  '  htmldocs        - HTML'
-        @echo  '  installmandocs  - install man pages generated by mandocs'
-        @echo  '  mandocs         - man pages'
         @echo  '  pdfdocs         - PDF'
         @echo  '  psdocs          - Postscript'
         @echo  '  xmldocs         - XML DocBook'
+        @echo  '  mandocs         - man pages'
+        @echo  '  installmandocs  - install man pages generated by mandocs'
+        @echo  '  cleandocs       - clean all generated DocBook files'
 
 ###
 # Temporary files left by various tools
@@ -235,6 +236,10 @@ clean-files := $(DOCBOOKS) \
 
 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 
+cleandocs:
+        $(Q)rm -f $(call objectify, $(clean-files))
+        $(Q)rm -rf $(call objectify, $(clean-dirs))
+
 # Declare the contents of the .PHONY variable as phony.  We keep that
 # information in a variable se we can use it in if_changed and friends.
 
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 51104f9194a5..d4b05672f9f7 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -40,10 +40,16 @@ This document describes the Linux kernel Makefiles.
            --- 6.7 Custom kbuild commands
            --- 6.8 Preprocessing linker scripts
 
-        === 7 Kbuild Variables
-        === 8 Makefile language
-        === 9 Credits
-        === 10 TODO
+        === 7 Kbuild syntax for exported headers
+                --- 7.1 header-y
+                --- 7.2 objhdr-y
+                --- 7.3 destination-y
+                --- 7.4 unifdef-y (deprecated)
+
+        === 8 Kbuild Variables
+        === 9 Makefile language
+        === 10 Credits
+        === 11 TODO
 
 === 1 Overview
 
@@ -1143,8 +1149,69 @@ When kbuild executes, the following steps are followed (roughly):
         The kbuild infrastructure for *lds file are used in several
         architecture-specific files.
 
+=== 7 Kbuild syntax for exported headers
+
+The kernel include a set of headers that is exported to userspace.
+Many headers can be exported as-is but other headers requires  a
+minimal pre-processing before they are ready for user-space.
+The pre-processing does:
+- drop kernel specific annotations
+- drop include of compiler.h
+- drop all sections that is kernel internat (guarded by ifdef __KERNEL__)
+
+Each relevant directory contain a file name "Kbuild" which specify the
+headers to be exported.
+See subsequent chapter for the syntax of the Kbuild file.
+
+        --- 7.1 header-y
+
+        header-y specify header files to be exported.
+
+                Example:
+                        #include/linux/Kbuild
+                        header-y += usb/
+                        header-y += aio_abi.h
+
+        The convention is to list one file per line and
+        preferably in alphabetic order.
+
+        header-y also specify which subdirectories to visit.
+        A subdirectory is identified by a trailing '/' which
+        can be seen in the example above for the usb subdirectory.
+
+        Subdirectories are visited before their parent directories.
+
+        --- 7.2 objhdr-y
+
+        objhdr-y specifies generated files to be exported.
+        Generated files are special as they need to be looked
+        up in another directory when doing 'make O=...' builds.
+
+                Example:
+                        #include/linux/Kbuild
+                        objhdr-y += version.h
+
+        --- 7.3 destination-y
+
+        When an architecture have a set of exported headers that needs to be
+        exported to a different directory destination-y is used.
+        destination-y specify the destination directory for all exported
+        headers in the file where it is present.
+
+                Example:
+                        #arch/xtensa/platforms/s6105/include/platform/Kbuild
+                        destination-y := include/linux
+
+        In the example above all exported headers in the Kbuild file
+        will be located in the directory "include/linux" when exported.
+
+
+        --- 7.4 unifdef-y (deprecated)
+
+        unifdef-y is deprecated. A direct replacement is header-y.
+
 
-=== 7 Kbuild Variables
+=== 8 Kbuild Variables
 
 The top Makefile exports the following variables:
 
@@ -1206,7 +1273,7 @@ The top Makefile exports the following variables:
         INSTALL_MOD_STRIP will used as the option(s) to the strip command.
 
 
-=== 8 Makefile language
+=== 9 Makefile language
 
 The kernel Makefiles are designed to be run with GNU Make.  The Makefiles
 use only the documented features of GNU Make, but they do use many
@@ -1225,14 +1292,14 @@ time the left-hand side is used.
 There are some cases where "=" is appropriate.  Usually, though, ":="
 is the right choice.
 
-=== 9 Credits
+=== 10 Credits
 
 Original version made by Michael Elizabeth Chastain, <mailto:mec@shout.net>
 Updates by Kai Germaschewski <kai@tp1.ruhr-uni-bochum.de>
 Updates by Sam Ravnborg <sam@ravnborg.org>
 Language QA by Jan Engelhardt <jengelh@gmx.de>
 
-=== 10 TODO
+=== 11 TODO
 
 - Describe how kbuild supports shipped files with _shipped.
 - Generating offset header files.
diff --git a/Documentation/sparse.txt b/Documentation/sparse.txt
index 42f43fa59f24..34c76a55bc04 100644
--- a/Documentation/sparse.txt
+++ b/Documentation/sparse.txt
@@ -42,6 +42,14 @@ sure that bitwise types don't get mixed up (little-endian vs big-endian
 vs cpu-endian vs whatever), and there the constant "0" really _is_
 special.
 
+__bitwise__ - to be used for relatively compact stuff (gfp_t, etc.) that
+is mostly warning-free and is supposed to stay that way.  Warnings will
+be generated without __CHECK_ENDIAN__.
+
+__bitwise - noisy stuff; in particular, __le*/__be* are that.  We really
+don't want to drown in noise unless we'd explicitly asked for it.
+
+
 Getting sparse
 ~~~~~~~~~~~~~~
 
diff --git a/Makefile b/Makefile
index e5ad5fd96177..ad830bd45a4b 100644
--- a/Makefile
+++ b/Makefile
@@ -567,7 +567,7 @@ KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 # disable pointer signed / unsigned warnings in gcc 4.0
 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 
-# disable invalid "can't wrap" optimzations for signed / pointers
+# disable invalid "can't wrap" optimizations for signed / pointers
 KBUILD_CFLAGS   += $(call cc-option,-fwrapv)
 
 # revert to pre-gcc-4.4 behaviour of .eh_frame
@@ -597,6 +597,10 @@ LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 
+ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
+LDFLAGS_vmlinux += -X
+endif
+
 # Default kernel image to build when no specific target is given.
 # KBUILD_IMAGE may be overruled on the command line or
 # set in the environment
@@ -1587,5 +1591,5 @@ PHONY += FORCE
 FORCE:
 
 # Declare the contents of the .PHONY variable as phony.  We keep that
-# information in a variable se we can use it in if_changed and friends.
+# information in a variable so we can use it in if_changed and friends.
 .PHONY: $(PHONY)
diff --git a/init/Kconfig b/init/Kconfig
index f2f9b5362b48..7be4d3836745 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -808,6 +808,14 @@ config KALLSYMS_EXTRA_PASS
            you wait for kallsyms to be fixed.
 
 
+config STRIP_ASM_SYMS
+        bool "Strip assembler-generated symbols during link"
+        default n
+        help
+          Strip internal assembler-generated symbols during a link (symbols
+          that look like '.Lxxx') so they don't pollute the output of
+          get_wchan() and suchlike.
+
 config HOTPLUG
         bool "Support for hot-pluggable devices" if EMBEDDED
         default y
diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
index 612dc13ddd85..095cfc8b9dbf 100644
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -14,6 +14,8 @@ _dst := $(if $(dst),$(dst),$(obj))
 kbuild-file := $(srctree)/$(obj)/Kbuild
 include $(kbuild-file)
 
+_dst := $(if $(destination-y),$(destination-y),$(_dst))
+
 include scripts/Kbuild.include
 
 install       := $(INSTALL_HDR_PATH)/$(_dst)
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 3eea8f15131b..76af5f9623e3 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -97,7 +97,7 @@ print_mtime() {
 }
 
 list_parse() {
-        echo "$1 \\"
+        [ ! -L "$1" ] && echo "$1 \\" || :
 }
 
 # for each file print a line in following format
diff --git a/scripts/headerdep.pl b/scripts/headerdep.pl
index 97399da89ef2..b7f6c560e24d 100755
--- a/scripts/headerdep.pl
+++ b/scripts/headerdep.pl
@@ -19,7 +19,7 @@ my $opt_graph;
         version => \&version,
 
         all     => \$opt_all,
-        I       => \@opt_include,
+        "I=s"   => \@opt_include,
         graph   => \$opt_graph,
 );
 
diff --git a/scripts/kconfig/kxgettext.c b/scripts/kconfig/kxgettext.c
index 6eb72a7f2562..8d9ce22b0fc5 100644
--- a/scripts/kconfig/kxgettext.c
+++ b/scripts/kconfig/kxgettext.c
@@ -43,6 +43,10 @@ static char *escape(const char* text, char *bf, int len)
                         ++text;
                         goto next;
                 }
+                else if (*text == '\\') {
+                        *bfp++ = '\\';
+                        len--;
+                }
                 *bfp++ = *text++;
 next:
                 --len;
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 8cc70612984c..df6e6286a065 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1913,7 +1913,7 @@ static void read_dump(const char *fname, unsigned int kernel)
                 if (!mod) {
                         if (is_vmlinux(modname))
                                 have_vmlinux = 1;
-                        mod = new_module(NOFAIL(strdup(modname)));
+                        mod = new_module(modname);
                         mod->skip = 1;
                 }
                 s = sym_add_exported(symname, mod, export_no(export));
@@ -1997,7 +1997,7 @@ static void read_markers(const char *fname)
 
                 mod = find_module(modname);
                 if (!mod) {
-                        mod = new_module(NOFAIL(strdup(modname)));
+                        mod = new_module(modname);
                         mod->skip = 1;
                 }
                 if (is_vmlinux(modname)) {
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index f1c4b35bc324..47e75b69a2e9 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -21,7 +21,7 @@ if head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
 
         # Is this git on svn?
         if git config --get svn-remote.svn.url >/dev/null; then
-                printf -- '-svn%s' "`git-svn find-rev $head`"
+                printf -- '-svn%s' "`git svn find-rev $head`"
         fi
 
         # Are there uncommitted changes?