[PATCH] kbuild: use -Oz instead of -Os when using clang

[Matthias Kaehlcke]

This generates smaller resulting object code when compiled with clang.

Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
---
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index b2faa9319372..66bcdbf58371 100644
--- a/Makefile
+++ b/Makefile
@@ -638,7 +638,8 @@ KBUILD_CFLAGS	+= $(call cc-option,-fdata-sections,)
 endif
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
+KBUILD_CFLAGS	+= $(call cc-option,-Oz,-Os)
+KBUILD_CFLAGS	+= $(call cc-disable-warning,maybe-uninitialized,)
 else
 ifdef CONFIG_PROFILE_ALL_BRANCHES
 KBUILD_CFLAGS	+= -O2 $(call cc-disable-warning,maybe-uninitialized,)
-- 
2.12.2.564.g063fe858b8-goog