Doug / smarc-fsl-linux-kernel

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Commit c0e9afc0da6cb0f11497e5ea83377b3c451450e0

Authored by Andi Kleen
Committed by H. Peter Anvin
1 parent f6365201d8
Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga

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@linux.intel.com>
Link: http://lkml.kernel.org/r/1332960678-11879-1-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@vger.kernel.org>

Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff

... ... @@ -129,6 +129,7 @@
129 129 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
130 130 # prevent gcc from generating any FP code by mistake
131 131 KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
  132 +KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
132 133  
133 134 KBUILD_CFLAGS += $(mflags-y)
134 135 KBUILD_AFLAGS += $(mflags-y)