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kbuild: Don't reset timestamps in include/generated if not needed
[cascardo/linux.git]
/
Kbuild
diff --git
a/Kbuild
b/Kbuild
index
ab8ded9
..
96d0629
100644
(file)
--- a/
Kbuild
+++ b/
Kbuild
@@
-13,8
+13,9
@@
define sed-y
s:->::; p;}"
endef
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"; \
(set -e; \
echo "#ifndef $2"; \
echo "#define $2"; \
@@
-24,9
+25,9
@@
define cmd_offsets
echo " * This file was generated by Kbuild"; \
echo " */"; \
echo ""; \
echo " * This file was generated by Kbuild"; \
echo " */"; \
echo ""; \
- sed -ne $(sed-y)
$<
; \
+ sed -ne $(sed-y); \
echo ""; \
echo ""; \
- echo "#endif" )
> $@
+ echo "#endif" )
endef
#####
endef
#####
@@
-42,9
+43,8
@@
kernel/bounds.s: kernel/bounds.c FORCE
$(Q)mkdir -p $(dir $@)
$(call if_changed_dep,cc_s_c)
$(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
+ $(call filechk,offsets,__LINUX_BOUNDS_H__)
#####
# 2) Generate asm-offsets.h
#####
# 2) Generate asm-offsets.h
@@
-62,8
+62,8
@@
arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
$(Q)mkdir -p $(dir $@)
$(call if_changed_dep,cc_s_c)
$(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
#####
# 3) Check for missing system calls