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Commit 1fdfa4c6 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Michael Ellerman
Browse files

powerpc: improve prom_init_check rule 



This slightly improves the prom_init_check rule.

[1] Avoid needless check

Currently, prom_init_check.sh is invoked every time you run 'make'
even if you have changed nothing in prom_init.c. With this commit,
the script is re-run only when prom_init.o is recompiled.

[2] Beautify the build log

Currently, the O= build shows the absolute path to the script:

  CALL    /abs/path/to/source/of/linux/arch/powerpc/kernel/prom_init_check.sh

With this commit, it is always a relative path to the timestamp file:

  PROMCHK arch/powerpc/kernel/prom_init_check

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190912074037.13813-1-yamada.masahiro@socionext.com
parent caff52dc

arch/powerpc/kernel/.gitignore

+1 −0
Original line number Diff line number Diff line 
prom_init_check

vmlinux.lds

arch/powerpc/kernel/Makefile

+6 −8
Original line number Diff line number Diff line
@@ -188,15 +188,13 @@ extra-$(CONFIG_ALTIVEC) += vector.o 
extra-$(CONFIG_PPC64)		+= entry_64.o

extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)	+= prom_init.o



ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE

$(obj)/built-in.a:		prom_init_check

extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)	+= prom_init_check



quiet_cmd_prom_init_check = CALL    $<

      cmd_prom_init_check = $(CONFIG_SHELL) $< "$(NM)" "$(obj)/prom_init.o"

quiet_cmd_prom_init_check = PROMCHK $@

      cmd_prom_init_check = $(CONFIG_SHELL) $< "$(NM)" $(obj)/prom_init.o; touch $@



PHONY += prom_init_check

prom_init_check: $(src)/prom_init_check.sh $(obj)/prom_init.o

	$(call cmd,prom_init_check)

endif

$(obj)/prom_init_check: $(src)/prom_init_check.sh $(obj)/prom_init.o FORCE

	$(call if_changed,prom_init_check)

targets += prom_init_check



clean-files := vmlinux.lds