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| author | Andi Kleen <ak@linux.intel.com> | 2012-03-28 11:51:17 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-03-30 10:06:39 -0700 |
| commit | c0e9afc0da6cb0f11497e5ea83377b3c451450e0 (patch) | |
| tree | 37d6e2f3771b86bbfa12b7a534ebc8f96950493e /arch/x86/Makefile | |
| parent | f6365201d8a21fb347260f89d6e9b3e718d63c70 (diff) | |
| download | op-kernel-dev-c0e9afc0da6cb0f11497e5ea83377b3c451450e0.zip op-kernel-dev-c0e9afc0da6cb0f11497e5ea83377b3c451450e0.tar.gz | |
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>
Diffstat (limited to 'arch/x86/Makefile')
| -rw-r--r-- | 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) |
