Re: [PATCH v2 0/3] x86: faster mb()+other barrier.h tweaks

[Peter Zijlstra]

On Wed, Jan 27, 2016 at 04:07:56PM +0200, Michael S. Tsirkin wrote:
> mwait_idle is the only one that calls smp_mb and not mb()
> I couldn't figure out why - original patches did mb()
> there.

That probably wants changing. That said, running UP kernels on affected
hardware is 'unlikely' :-)