Index: linux-2.6.22.19/Makefile =================================================================== --- linux-2.6.22.19.orig/Makefile +++ linux-2.6.22.19/Makefile @@ -507,6 +507,9 @@ CFLAGS += $(call cc-option, -fn NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) CHECKFLAGS += $(NOSTDINC_FLAGS) +# improve gcc optimization +CFLAGS += $(call cc-option,-funit-at-a-time,) + # warn about C99 declaration after statement CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)