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

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next: (25 commits)
  setlocalversion: do not describe if there is nothing to describe
  kconfig: fix typos: "Suport" -> "Support"
  kconfig: make defconfig is no longer chatty
  kconfig: make oldconfig is now less chatty
  kconfig: speed up all*config + randconfig
  kconfig: set all new symbols automatically
  kconfig: add diffconfig utility
  kbuild: remove Module.markers during mrproper
  kbuild: sparse needs CF not CHECKFLAGS
  kernel-doc: handle/strip __init
  vmlinux.lds: move __attribute__((__cold__)) functions back into final .text section
  init: fix URL of "The GNU Accounting Utilities"
  kbuild: add arch/$ARCH/include to search path
  kbuild: asm symlink support for arch/$ARCH/include
  kbuild: support arch/$ARCH/include for tags, cscope
  kbuild: prepare headers_* for arch/$ARCH/include
  kbuild: install all headers when arch is changed
  kbuild: make clean removes *.o.* as well
  kbuild: optimize headers_* targets
  kbuild: only one call for include/ in make headers_*
  ...

diff --combined Makefile
index 3cad7db,b4a52d2..40f2481
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -205,6 -205,9 +205,9 @@@ ifeq ($(ARCH),x86_64
          SRCARCH := x86
  endif
  
+ # Where to locate arch specific headers
+ hdr-arch       := $(SRCARCH)
+ 
  KCONFIG_CONFIG        ?= .config
  
  # SHELL used by kbuild
@@@ -326,7 -329,8 +329,8 @@@ AFLAGS_KERNEL      
  # Needed to be compatible with the O= option
  LINUXINCLUDE    := -Iinclude \
                     $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
-                  -include include/linux/autoconf.h
+                    -I$(srctree)/arch/$(hdr-arch)/include               \
+                    -include include/linux/autoconf.h
  
  KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  
@@@ -922,7 -926,9 +926,9 @@@ ifneq ($(KBUILD_SRC),
                /bin/false; \
        fi;
        $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
-       $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
+       $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/system.h ]; then  \
+           ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
+           fi
  endif
  
  # prepare2 creates a makefile if using a separate output directory
@@@ -948,22 -954,34 +954,34 @@@ export CPPFLAGS_vmlinux.lds += -P -C -U
  
  # The asm symlink changes when $(ARCH) changes.
  # Detect this and ask user to run make mrproper
- 
- include/asm: FORCE
-       $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`;   \
-       if [ -L include/asm ]; then                                     \
-               if [ "$$asmlink" != "$(SRCARCH)" ]; then                \
+ define check-symlink
+       set -e;                                                            \
+       if [ -L include/asm ]; then                                        \
+               asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
+               if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
                        echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
                        echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
-                       exit 1;                                         \
-               fi;                                                     \
-       else                                                            \
-               echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';          \
-               if [ ! -d include ]; then                               \
-                       mkdir -p include;                               \
-               fi;                                                     \
-               ln -fsn asm-$(SRCARCH) $@;                              \
+                       exit 1;                                            \
+               fi;                                                        \
        fi
+ endef
+ 
+ # We create the target directory of the symlink if it does
+ # not exist so the test in chack-symlink works and we have a
+ # directory for generated filesas used by some architectures.
+ define create-symlink
+       if [ ! -L include/asm ]; then                                      \
+                       echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';     \
+                       if [ ! -d include/asm-$(SRCARCH) ]; then           \
+                               mkdir -p include/asm-$(SRCARCH);           \
+                       fi;                                                \
+                       ln -fsn asm-$(SRCARCH) $@;                         \
+       fi
+ endef
+ 
+ include/asm: FORCE
+       $(Q)$(check-symlink)
+       $(Q)$(create-symlink)
  
  # Generate some files
  # ---------------------------------------------------------------------------
@@@ -1010,36 -1028,43 +1028,43 @@@ firmware_install: FORC
  
  # ---------------------------------------------------------------------------
  # Kernel headers
- INSTALL_HDR_PATH=$(objtree)/usr
- export INSTALL_HDR_PATH
  
- HDRFILTER=generic i386 x86_64
- HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
+ #Default location for installed headers
+ export INSTALL_HDR_PATH = $(objtree)/usr
  
- PHONY += headers_install_all
- headers_install_all: include/linux/version.h scripts_basic FORCE
+ hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
+ # Find out where the Kbuild file is located to support
+ # arch/$(ARCH)/include/asm
+ hdr-dir = $(strip                                                         \
+           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
+                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
+ 
+ # If we do an all arch process set dst to asm-$(hdr-arch)
+ hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
+ 
+ PHONY += __headers
+ __headers: include/linux/version.h scripts_basic FORCE
        $(Q)$(MAKE) $(build)=scripts scripts/unifdef
-       $(Q)for arch in $(HDRARCHES); do \
-        $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
-        done
+ 
+ PHONY += headers_install_all
+ headers_install_all:
+       $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  
  PHONY += headers_install
- headers_install: include/linux/version.h scripts_basic FORCE
-       @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
-         echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
-         exit 1 ; fi
-       $(Q)$(MAKE) $(build)=scripts scripts/unifdef
-       $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
+ headers_install: __headers
+       $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
+       $(error Headers not exportable for the $(SRCARCH) architecture))
+       $(Q)$(MAKE) $(hdr-inst)=include
+       $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
  
  PHONY += headers_check_all
  headers_check_all: headers_install_all
-       $(Q)for arch in $(HDRARCHES); do \
-        $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
-        done
+       $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  
  PHONY += headers_check
  headers_check: headers_install
-       $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
+       $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
+       $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
  
  # ---------------------------------------------------------------------------
  # Modules
@@@ -1061,7 -1086,6 +1086,7 @@@ modules: $(vmlinux-dirs) $(if $(KBUILD_
        $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
        @echo '  Building modules, stage 2.';
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 +      $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  
  
  # Target to prepare building external modules
@@@ -1131,7 -1155,7 +1156,7 @@@ MRPROPER_FILES += .config .config.old i
                    include/linux/autoconf.h include/linux/version.h      \
                    include/linux/utsrelease.h                            \
                    include/linux/bounds.h include/asm*/asm-offsets.h     \
-                 Module.symvers tags TAGS cscope*
+                 Module.symvers Module.markers tags TAGS cscope*
  
  # clean - Delete most, but leave enough to build external modules
  #
@@@ -1150,7 -1174,7 +1175,7 @@@ clean: archclean $(clean-dirs
                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
                -o -name '*.symtypes' -o -name 'modules.order' \
-               -o -name 'Module.markers' \) \
+               -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
                -type f -print | xargs rm -f
  
  # mrproper - Delete all generated files, including .config
@@@ -1224,21 -1248,17 +1249,17 @@@ help
        @echo  '  cscope          - Generate cscope index'
        @echo  '  kernelrelease   - Output the release version string'
        @echo  '  kernelversion   - Output the version stored in Makefile'
-       @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
-        echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
+       @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
         echo  '                    (default: $(INSTALL_HDR_PATH))'; \
-        fi
-       @echo  ''
+        echo  ''
        @echo  'Static analysers'
        @echo  '  checkstack      - Generate a list of stack hogs'
        @echo  '  namespacecheck  - Name space analysis on compiled kernel'
        @echo  '  versioncheck    - Sanity check on version.h usage'
        @echo  '  includecheck    - Check for duplicate included header files'
        @echo  '  export_report   - List the usages of all exported symbols'
-       @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
-        echo  '  headers_check   - Sanity check on exported headers'; \
-        fi
-       @echo  ''
+       @echo  '  headers_check   - Sanity check on exported headers'; \
+        echo  ''
        @echo  'Kernel packaging:'
        @$(MAKE) $(build)=$(package-dir) help
        @echo  ''
@@@ -1411,7 -1431,11 +1432,11 @@@ define find-source
               \( -name config -o -name 'asm-*' \) -prune \
               -o -name $1 -print; \
          for arch in $(ALLINCLUDE_ARCHS) ; do \
-              find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
+              test -e $(__srctree)include/asm-$${arch} && \
+                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
+                   -name $1 -print; \
+              test -e $(__srctree)arch/$${arch}/include/asm && \
+                find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
                    -name $1 -print; \
          done ; \
          find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \

diff --combined include/asm-generic/vmlinux.lds.h
index 9cd44b1,bd2be5f..6d88a92
--- 1/include/asm-generic/vmlinux.lds.h
--- 2/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@@ -221,6 -221,7 +221,7 @@@
   * during second ld run in second ld pass when generating System.map */
  #define TEXT_TEXT                                                     \
                ALIGN_FUNCTION();                                       \
+               *(.text.hot)                                            \
                *(.text)                                                \
                *(.ref.text)                                            \
                *(.text.init.refok)                                     \
@@@ -230,7 -231,8 +231,8 @@@
        CPU_KEEP(init.text)                                             \
        CPU_KEEP(exit.text)                                             \
        MEM_KEEP(init.text)                                             \
-       MEM_KEEP(exit.text)
+       MEM_KEEP(exit.text)                                             \
+               *(.text.unlikely)
  
  
  /* sched.text is aling to function alignment to secure we have same
@@@ -359,8 -361,6 +361,8 @@@
        }
  
  #define INITCALLS                                                     \
 +      *(.initcallearly.init)                                          \
 +      __early_initcall_end = .;                                       \
        *(.initcall0.init)                                              \
        *(.initcall0s.init)                                             \
        *(.initcall1.init)                                              \