Messages in this thread | | | Date | Fri, 28 Jun 2013 07:12:18 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64 |
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On 06/28/2013 07:09 AM, Borislav Petkov wrote: > > Our testing for asm goto otherwise is a bit more, hmm, hands-on in > arch/x86/include/asm/cpufeature.h: > > #if __GNUC__ > 4 || __GNUC_MINOR__ >= 5 > > Maybe I should change that to the more explicit CC_HAVE_ASM_GOTO then. >
We should... we didn't have the asm goto test at the time that code was written, but I think the tracing guys added it either because some distros backported asm goto or to deal with it on non-x86 architectures.
-hpa
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