--- a/Makefile
+++ b/Makefile
@@ -559,9 +559,9 @@ endif # $(dot-config)
 all: vmlinux
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS	+= -Os
+KBUILD_CFLAGS	+= -Os $(EXTRA_OPTIMIZATION)
 else
-KBUILD_CFLAGS	+= -O2
+KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION)
 endif
 
 include $(srctree)/arch/$(SRCARCH)/Makefile