Messages in this thread | | | Date | Wed, 6 Jul 2011 08:33:29 -0700 | From | Randy Dunlap <> | Subject | Re: [PATCH] kernel: prevent unnecessary rebuilding due to config_data.gz |
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On Tue, 05 Jul 2011 19:42:18 -0400 (EDT) Peter Foley wrote:
> When IKCONFIG is built-in make oldconfig will cause the kernel to be > relinked even if .config didn't change. This happens because of a > config_data.gz dependency on .config. This patch changes the if_changed to > a filechk so that config_data.h is only rebuilt when the contents > have actually changed. > > Signed-off-by: Peter Foley <pefoley2@verizon.net>
Michal, If this looks OK to you, please merge it.
Thanks.
> --- > kernel/Makefile | 5 ++--- > 1 files changed, 2 insertions(+), 3 deletions(-) > > diff --git a/kernel/Makefile b/kernel/Makefile > index 2d64cfc..d06467f 100644 > --- a/kernel/Makefile > +++ b/kernel/Makefile > @@ -125,11 +125,10 @@ targets += config_data.gz > $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE > $(call if_changed,gzip) > > -quiet_cmd_ikconfiggz = IKCFG $@ > - cmd_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") > $@ > + filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") > targets += config_data.h > $(obj)/config_data.h: $(obj)/config_data.gz FORCE > - $(call if_changed,ikconfiggz) > + $(call filechk,ikconfiggz) > > $(obj)/time.o: $(obj)/timeconst.h > > --
--- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code ***
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