kernel: prevent unnecessary rebuilding due to config_data.gz (e78e8f2d) · Commits · 戴 / test

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> Signed-off-by:

Michal Marek <mmarek@suse.cz>

kernel/Makefile

+2 −3

Original line number	Diff line number	Diff line
		@@ -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

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