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_*
  ...

1 files changed, 70 insertions, 45 deletions

diff --git a/Makefile b/Makefile
index 3cad7db5eba7..40f24810116c 100644
--- a/Makefile
+++ b/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) \