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- --- a/Makefile
- +++ b/Makefile
- @@ -537,7 +537,7 @@ all: vmlinux
- ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
- KBUILD_CFLAGS += -Os
- else
- -KBUILD_CFLAGS += -O2
- +KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch
- endif
-
- include $(srctree)/arch/$(SRCARCH)/Makefile
- @@ -579,6 +579,9 @@ endif
- 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
- KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
-
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