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    SubjectRe: [PATCH] [2/58] x86_64: Tell gcc to only align stack to 8 bytes
    On 07/19/2007 05:54 AM, Andi Kleen wrote:
    > Don't need 16 byte alignment because kernel doesn't use SSE2
    >
    > Signed-off-by: Andi Kleen <ak@suse.de>
    >
    > ---
    > arch/x86_64/Makefile | 1 +
    > 1 file changed, 1 insertion(+)
    >
    > Index: linux/arch/x86_64/Makefile
    > ===================================================================
    > --- linux.orig/arch/x86_64/Makefile
    > +++ linux/arch/x86_64/Makefile
    > @@ -55,6 +55,7 @@ cflags-y += $(call cc-option,-mno-sse -m
    > # this works around some issues with generating unwind tables in older gccs
    > # newer gccs do it by default
    > cflags-y += -maccumulate-outgoing-args
    > +cflags-y += -mpreferred-stack-boundary=4

    Should be:

    +cflags-y += -mpreferred-stack-boundary=3

    >
    > # do binutils support CFI?
    > cflags-y += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
    -
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