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authorIngo Molnar <mingo@elte.hu>2007-02-22 09:38:22 +0100
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-26 12:53:30 -0800
commit25165120f2432ffa36518d53bd3ec66f6e434f63 (patch)
tree7ef036d734cb14579040d2825bdf30a9a24daca5
parent38bed5429987c939d86cd3da915d6706fd1e6e53 (diff)
[PATCH] x86: add -freg-struct-return to CFLAGS
Jeremy Fitzhardinge suggested the use of -freg-struct-return, which does structure-returns (such as when using pte_t) in registers instead of on the stack. that is indeed so, and this option reduced the kernel size a bit: text data bss dec hex filename 4799506 543456 3760128 9103090 8ae6f2 vmlinux.before 4798117 543456 3760128 9101701 8ae185 vmlinux.after the resulting kernel booted fine on my testbox. Lets go for it. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/i386/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index f7ac1aea1d8..bd28f9f9b4b 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -31,7 +31,7 @@ LDFLAGS_vmlinux := --emit-relocs
endif
CHECKFLAGS += -D__i386__
-CFLAGS += -pipe -msoft-float -mregparm=3
+CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
# prevent gcc from keeping the stack 16 byte aligned
CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)