[PATCHv3] PowerPC: Fix a race condition when eliding a lock

[Carlos O'Donell]

On 08/25/2015 05:06 PM, Paul E. Murphy wrote:
> The discussion this patch launched has been quite informative. Circling
> back to the patch; it should fix the bug in question while we determine
> how to improve the common code.
> 
> My only trivial nit is the x86 version might benefit from a similar
> comment regarding concurrency, otherwise LGTM.

Thanks for the review Paul!

Yes, the x86 code needs the same treatment and I think we'll do that
next by fixing up all callers to use an inline function.

c.