path: root/kernel/Makefile
diff options
authorPeter Foley <pefoley2@verizon.net>2011-07-05 19:42:18 -0400
committerMichal Marek <mmarek@suse.cz>2011-07-20 01:32:32 +0200
commite78e8f2d8318851d0911039999c903a6082bef2e (patch)
tree6de5c0c1fd3219985116b2225448c0c0f8a23093 /kernel/Makefile
parentf210735fe2f17a6225432ee3d1239bcf23a8659c (diff)
kernel: prevent unnecessary rebuilding due to config_data.gz
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>
Diffstat (limited to 'kernel/Makefile')
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
index 2d64cfcc8b4..d06467fc8f7 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