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| author | Michal Marek <mmarek@suse.cz> | 2015-03-11 11:01:01 +0100 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2015-03-24 17:37:25 +0100 |
| commit | 70a4fd6c56d0f581a63dffd8c31d180e96ecf6a6 (patch) | |
| tree | 1a1640ae201a1d8faa2fd740a027cc8d699c28fe /Kbuild | |
| parent | c517d838eb7d07bbe9507871fab3931deccff539 (diff) | |
| download | lwn-70a4fd6c56d0f581a63dffd8c31d180e96ecf6a6.tar.gz lwn-70a4fd6c56d0f581a63dffd8c31d180e96ecf6a6.zip | |
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: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Acked-By: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'Kbuild')
| -rw-r--r-- | Kbuild | 18 |
1 files changed, 9 insertions, 9 deletions
@@ -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 |