__HAVE_ARCH_CMPXCHG on ARM?

[Josh Cartwright]

On Wed, Feb 18, 2015 at 11:44:59AM +0100, Sebastian Andrzej Siewior wrote:
> * Josh Cartwright | 2015-02-03 13:27:30 [-0600]:
> 
> >                 native         native
> >                cmpxchg (UP)   cmpxchg (SMP)    __HAVE_ARCH_CMPXCHG
> >         xtensa     X               X
> 
> This one does not always have cmpxchg on UP (only the SMP variant which
> provides atomic operation).

Ah!  Thanks for double checking my work; my eyes started to glaze over
after looking at the other 29 architectures.

  Josh