Re: Question about barriers for ARM on tools/perf/
From: Peter Zijlstra
Date: Fri May 08 2015 - 11:28:20 EST
On Fri, May 08, 2015 at 11:57:01AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, May 08, 2015 at 03:48:20PM +0100, Will Deacon escreveu:
> > Do you know what the objection to the intrinsics was? I believe that
> > the __sync versions are deprecated in favour of the C11-like __atomic
> > flavours, so if that was all the objection was about then we could use
> > one or the other depending on what the compiler supports.
> Peter? Ingo?
I cannot remember, the __sync things should mostly work I suppose, and
if you wrap then in the normal atomic interface we don't have to learn
yet another API.
That said, I've successfully lifted this kernel code into userspace in
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