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Commit 70a4fd6c authored by Michal Marek's avatar Michal Marek
Browse files

kbuild: Don't reset timestamps in include/generated if not needed 



Use filechk to generate asm-offsets.h and bounds.h. Based on a patch by
Valdis Kletnieks.

Reported-by: default avatarValdis Kletnieks <Valdis.Kletnieks@vt.edu>
Acked-By: default avatarValdis Kletnieks <Valdis.Kletnieks@vt.edu>
Reviewed-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
parent c517d838

Kbuild

+9 −9
Original line number Diff line number Diff line
@@ -13,8 +13,9 @@ define sed-y 
	s:->::; p;}"

endef



quiet_cmd_offsets = GEN     $@

define cmd_offsets

# Use filechk to avoid rebuilds when a header changes, but the resulting file

# does not

define filechk_offsets

	(set -e; \

	 echo "#ifndef $2"; \

	 echo "#define $2"; \
@@ -24,9 +25,9 @@ define cmd_offsets 
	 echo " * This file was generated by Kbuild"; \

	 echo " */"; \

	 echo ""; \

	 sed -ne $(sed-y) $<; \

	 sed -ne $(sed-y); \

	 echo ""; \

	 echo "#endif" ) > $@

	 echo "#endif" )

endef



#####
@@ -42,9 +43,8 @@ kernel/bounds.s: kernel/bounds.c FORCE 
	$(Q)mkdir -p $(dir $@)

	$(call if_changed_dep,cc_s_c)



$(obj)/$(bounds-file): kernel/bounds.s Kbuild

	$(Q)mkdir -p $(dir $@)

	$(call cmd,offsets,__LINUX_BOUNDS_H__)

$(obj)/$(bounds-file): kernel/bounds.s FORCE

	$(call filechk,offsets,__LINUX_BOUNDS_H__)



#####

# 2) Generate asm-offsets.h
@@ -62,8 +62,8 @@ arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ 
	$(Q)mkdir -p $(dir $@)

	$(call if_changed_dep,cc_s_c)



$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild

	$(call cmd,offsets,__ASM_OFFSETS_H__)

$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE

	$(call filechk,offsets,__ASM_OFFSETS_H__)



#####

# 3) Check for missing system calls