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kernel: reorganize 2.6.37 patches

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26692 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2011-04-16 18:31:21 +00:00
parent b2cab73a78
commit 4d4c41d673
121 changed files with 366 additions and 376 deletions
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24
target/linux/generic/patches-2.6.37/201-extra_optimization.patch Normal file
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@@ -0,0 +1,24 @@
--- a/Makefile
+++ b/Makefile
@@ -538,9 +538,9 @@ 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
@@ -595,6 +595,9 @@ 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,)