Commit-ID: c0e9afc0da6cb0f11497e5ea83377b3c451450e0 Gitweb: http://git.kernel.org/tip/c0e9afc0da6cb0f11497e5ea83377b3c451450e0 Author: Andi Kleen <ak@xxxxxxxxxxxxxxx> AuthorDate: Wed, 28 Mar 2012 11:51:17 -0700 Committer: H. Peter Anvin <hpa@xxxxxxxxx> CommitDate: Fri, 30 Mar 2012 10:06:39 -0700 x86: Use -mno-avx when available On gccs that support AVX it's a good idea to disable that too, similar to how SSE2, SSE1 etc. are already disabled. This prevents the compiler from generating AVX ever implicitely. No failure observed, just from review. [ hpa: Marking this for urgent and stable, simply because the patch will either have absolutely no effect *or* it will avoid potentially very hard to debug failures. ] Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/1332960678-11879-1-git-send-email-andi@xxxxxxxxxxxxxx Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> --- arch/x86/Makefile | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 968dbe2..41a7237 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -129,6 +129,7 @@ KBUILD_CFLAGS += -Wno-sign-compare KBUILD_CFLAGS += -fno-asynchronous-unwind-tables # prevent gcc from generating any FP code by mistake KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) +KBUILD_CFLAGS += $(call cc-option,-mno-avx,) KBUILD_CFLAGS += $(mflags-y) KBUILD_AFLAGS += $(mflags-y) -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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