summaryrefslogtreecommitdiff
path: root/target/linux/generic/patches-2.6.36/012-extra_optimization.patch
blob: b5f4f393af7eebbffd4f496540a8d894dffaad9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
--- a/Makefile
+++ b/Makefile
@@ -532,7 +532,7 @@ 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
@@ -570,6 +570,9 @@ 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,)