Messages in this thread | | | Date | Fri, 28 Jun 2013 17:15:33 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64 |
| |
On Fri, Jun 28, 2013 at 07:12:18AM -0700, H. Peter Anvin wrote: > 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.
gcc backport in distro iirc
| |