1 files changed, 42 insertions, 33 deletions

diff --git a/Makefile b/Makefile
index 529b9048d97e..264f37b8b263 100644
--- a/Makefile
+++ b/Makefile
@@ -774,6 +774,9 @@ vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o
 ifdef CONFIG_HEADERS_CHECK
         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 endif
+ifdef CONFIG_SAMPLES
+        $(Q)$(MAKE) $(build)=samples
+endif
         $(call vmlinux-modpost)
         $(call if_changed_rule,vmlinux__)
         $(Q)rm -f .old_version
@@ -884,10 +887,7 @@ prepare2: prepare3 outputmakefile
 
 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
                    include/asm include/config/auto.conf
-ifneq ($(KBUILD_MODULES),)
-        $(Q)mkdir -p $(MODVERDIR)
-        $(Q)rm -f $(MODVERDIR)/*
-endif
+        $(cmd_crmodverdir)
 
 archprepare: prepare1 scripts_basic
 
@@ -903,14 +903,24 @@ prepare: prepare0
 
 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 
-# FIXME: The asm symlink changes when $(ARCH) changes. That's
-# hard to detect, but I suppose "make mrproper" is a good idea
-# before switching between archs anyway.
-
-include/asm:
-        @echo '  SYMLINK $@ -> include/asm-$(SRCARCH)'
-        $(Q)if [ ! -d include ]; then mkdir -p include; fi;
-        @ln -fsn asm-$(SRCARCH) $@
+# 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 [ "$$asmlink" != "$(SRCARCH)" ]; then                \
+                        echo "ERROR: the symlink $@ points to asm-$$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) $@;                              \
+        fi
 
 # Generate some files
 # ---------------------------------------------------------------------------
@@ -1020,19 +1030,12 @@ _modinst_:
         fi
         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
-# If System.map exists, run depmod.  This deliberately does not have a
-# dependency on System.map since that would run the dependency tree on
-# vmlinux.  This depmod is only for convenience to give the initial
+# This depmod is only for convenience to give the initial
 # boot a modules.dep even before / is mounted read-write.  However the
 # boot script depmod is the master version.
-ifeq "$(strip $(INSTALL_MOD_PATH))" ""
-depmod_opts     :=
-else
-depmod_opts     := -b $(INSTALL_MOD_PATH) -r
-endif
 PHONY += _modinst_post
 _modinst_post: _modinst_
-        if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
+        $(call cmd,depmod)
 
 else # CONFIG_MODULES
 
@@ -1220,8 +1223,7 @@ else # KBUILD_EXTMOD
 KBUILD_MODULES := 1
 PHONY += crmodverdir
 crmodverdir:
-        $(Q)mkdir -p $(MODVERDIR)
-        $(Q)rm -f $(MODVERDIR)/*
+        $(cmd_crmodverdir)
 
 PHONY += $(objtree)/Module.symvers
 $(objtree)/Module.symvers:
@@ -1249,15 +1251,6 @@ _emodinst_:
         $(Q)mkdir -p $(MODLIB)/$(install-dir)
         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
-# Run depmod only is we have System.map and depmod is executable
-quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
-      cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
-                      $(DEPMOD) -ae -F System.map             \
-                      $(if $(strip $(INSTALL_MOD_PATH)),      \
-                      -b $(INSTALL_MOD_PATH) -r)              \
-                      $(KERNELRELEASE);                       \
-                   fi
-
 PHONY += _emodinst_post
 _emodinst_post: _emodinst_
         $(call cmd,depmod)
@@ -1341,7 +1334,7 @@ define find-sources
           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
                -name $1 -print; \
           find $(__srctree) $(RCS_FIND_IGNORE) \
-               \( -name include -o -name arch \) -prune -o \
+               \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
                -name $1 -print; \
           )
 endef
@@ -1490,9 +1483,11 @@ endif
 
 # Modules
 / %/: prepare scripts FORCE
+        $(cmd_crmodverdir)
         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
         $(build)=$(build-dir)
 %.ko: prepare scripts FORCE
+        $(cmd_crmodverdir)
         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
         $(build)=$(build-dir) $(@:.ko=.o)
         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
@@ -1506,6 +1501,20 @@ quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
       cmd_rmfiles = rm -f $(rm-files)
 
+# Run depmod only is we have System.map and depmod is executable
+# and we build for the host arch
+quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
+      cmd_depmod = \
+        if [ -r System.map -a -x $(DEPMOD) ]; then                              \
+                $(DEPMOD) -ae -F System.map                                     \
+                $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
+                $(KERNELRELEASE);                                               \
+        fi
+
+# Create temporary dir for module support files
+# clean it up only when building all modules
+cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
+                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
 
 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
           $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \