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Message-Id: <1332960678-11879-1-git-send-email-andi@firstfloor.org> Date: Wed, 28 Mar 2012 11:51:17 -0700 From: Andi Kleen <andi@...stfloor.org> To: linux-kernel@...r.kernel.org Cc: x86@...nel.org, Andi Kleen <ak@...ux.intel.com> Subject: [PATCH 1/2] x86: Use -mno-avx when available From: Andi Kleen <ak@...ux.intel.com> 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. Signed-off-by: Andi Kleen <ak@...ux.intel.com> --- arch/x86/Makefile | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 209ba12..2c8aefd 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -113,6 +113,7 @@ 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) -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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