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@@ -13,8 +13,9 @@ define sed-y
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s:->::; p;}"
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endef
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-quiet_cmd_offsets = GEN $@
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-define cmd_offsets
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+# Use filechk to avoid rebuilds when a header changes, but the resulting file
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+# does not
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+define filechk_offsets
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(set -e; \
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echo "#ifndef $2"; \
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echo "#define $2"; \
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@@ -24,9 +25,9 @@ define cmd_offsets
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echo " * This file was generated by Kbuild"; \
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echo " */"; \
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echo ""; \
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- sed -ne $(sed-y) $<; \
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+ sed -ne $(sed-y); \
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echo ""; \
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- echo "#endif" ) > $@
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+ echo "#endif" )
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endef
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#####
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@@ -42,9 +43,8 @@ lib/asm-offsets.s: lib/asm-offsets.c FORCE
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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-$(obj)/$(generic-offsets-file): lib/asm-offsets.s Kbuild
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- $(Q)mkdir -p $(dir $@)
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- $(call cmd,offsets,__GENERIC_ASM_OFFSETS_H__)
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+$(obj)/$(generic-offsets-file): lib/asm-offsets.s FORCE
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+ $(call filechk,offsets,__GENERIC_ASM_OFFSETS_H__)
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#####
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# 2) Generate asm-offsets.h
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@@ -65,5 +65,5 @@ arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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-$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s Kbuild
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- $(call cmd,offsets,__ASM_OFFSETS_H__)
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+$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s FORCE
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+ $(call filechk,offsets,__ASM_OFFSETS_H__)
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