Re: locking/atomic: Introduce atomic_try_cmpxchg()

[Peter Zijlstra]

On Fri, Mar 24, 2017 at 12:20:37PM -0700, Linus Torvalds wrote:
> I doubt it's a show-stopper, if only because nobody cares about UP any
> more. Not even the embedded world does.

For some obscure reason we recently introduced a variant for virt
people. Where it would need memory barriers against the hypervisor, but
having only a single vCPU not against itself.