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_*
  ...

Documentation/sparse.txt

@@ -73,10 +73,10 @@ recompiled, or use "make C=2" to run sparse on the files whether they need to
 be recompiled or not.  The latter is a fast way to check the whole tree if you
 have already built it.
 
-The optional make variable CHECKFLAGS can be used to pass arguments to sparse.
-The build system passes -Wbitwise to sparse automatically.  To perform
-endianness checks, you may define __CHECK_ENDIAN__:
+The optional make variable CF can be used to pass arguments to sparse.  The
+build system passes -Wbitwise to sparse automatically.  To perform endianness
+checks, you may define __CHECK_ENDIAN__:
 
-        make C=2 CHECKFLAGS="-D__CHECK_ENDIAN__"
+        make C=2 CF="-D__CHECK_ENDIAN__"
 
 These checks are disabled by default as they generate a host of warnings.

Kbuild

@@ -43,7 +43,7 @@ $(obj)/$(bounds-file): kernel/bounds.s Kbuild
 # 2) Generate asm-offsets.h
 #
 
-offsets-file := include/asm-$(SRCARCH)/asm-offsets.h
+offsets-file := include/asm/asm-offsets.h
 
 always  += $(offsets-file)
 targets += $(offsets-file)
@@ -81,7 +81,6 @@ arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
 	$(call if_changed_dep,cc_s_c)
 
 $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
-	$(Q)mkdir -p $(dir $@)
 	$(call cmd,offsets)
 
 #####

Makefile

@@ -205,6 +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 @@ 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 @@ 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 @@ export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 
 # 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 @@ firmware_install: FORCE
 
 # ---------------------------------------------------------------------------
 # 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
@@ -1131,7 +1156,7 @@ MRPROPER_FILES += .config .config.old include/asm .version .old_version \
                   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 +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 +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 +1432,11 @@ define find-sources
 	       \( -name config -o -name 'asm-*' \) -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) \

drivers/misc/Kconfig

@@ -360,7 +360,7 @@ config THINKPAD_ACPI_VIDEO
 	  If you are not sure, say Y here.
 
 config THINKPAD_ACPI_HOTKEY_POLL
-	bool "Suport NVRAM polling for hot keys"
+	bool "Support NVRAM polling for hot keys"
 	depends on THINKPAD_ACPI
 	default y
 	---help---

include/Kbuild

@@ -1,9 +1,10 @@
+# Top-level Makefile calls into asm-$(ARCH)
+# List only non-arch directories below
+
 header-y += asm-generic/
 header-y += linux/
 header-y += sound/
 header-y += mtd/
 header-y += rdma/
 header-y += video/
 header-y += drm/
-
-header-y += asm-$(ARCH)/

include/asm-generic/vmlinux.lds.h

@@ -221,6 +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 @@
 	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

init/Kconfig

@@ -171,7 +171,7 @@ config BSD_PROCESS_ACCT_V3
 	  process and it's parent. Note that this file format is incompatible
 	  with previous v0/v1/v2 file formats, so you will need updated tools
 	  for processing it. A preliminary version of these tools is available
-	  at <http://www.physik3.uni-rostock.de/tim/kernel/utils/acct/>.
+	  at <http://www.gnu.org/software/acct/>.
 
 config TASKSTATS
 	bool "Export task/process statistics through netlink (EXPERIMENTAL)"
@@ -486,7 +486,7 @@ config PID_NS
 	default n
 	depends on NAMESPACES && EXPERIMENTAL
 	help
-	  Suport process id namespaces.  This allows having multiple
+	  Support process id namespaces.  This allows having multiple
 	  process with the same pid as long as they are in different
 	  pid namespaces.  This is a building block of containers.