diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.39/012-extra_optimization.patch')
| -rw-r--r-- | target/linux/generic/patches-2.6.39/012-extra_optimization.patch | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.39/012-extra_optimization.patch b/target/linux/generic/patches-2.6.39/012-extra_optimization.patch new file mode 100644 index 0000000000..8039c66523 --- /dev/null +++ b/target/linux/generic/patches-2.6.39/012-extra_optimization.patch @@ -0,0 +1,24 @@ +--- a/Makefile ++++ b/Makefile +@@ -543,9 +543,9 @@ endif # $(dot-config) + all: vmlinux + + ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE +-KBUILD_CFLAGS += -Os ++KBUILD_CFLAGS += -Os -fno-caller-saves + else +-KBUILD_CFLAGS += -O2 ++KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves + endif + + include $(srctree)/arch/$(SRCARCH)/Makefile +@@ -600,6 +600,9 @@ 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,) + |