Re: [PATCH 3/4] x86,asm: Re-work smp_store_mb()
From: Michael S. Tsirkin
Date: Wed Jan 13 2016 - 11:43:08 EST
On Wed, Jan 13, 2016 at 05:33:31PM +0100, Borislav Petkov wrote:
> On Wed, Jan 13, 2016 at 06:25:21PM +0200, Michael S. Tsirkin wrote:
> > Which flag do you refer to, exactly?
> All the flags in rFLAGS which ADD modifies: OF,SF,ZF,AF,PF,CF
Oh, I think this means we need a "cc" clobber.
This also seems to be a bug on !XMM CPUs.
cmpxchg.h gets it right.
I'll send a patch.
> ECO tip #101: Trim your mails when you reply.