__HAVE_ARCH_CMPXCHG on ARM?

(off-list ancestor, not in this archive)
__HAVE_ARCH_CMPXCHG on ARM? · Will Deacon <hidden> · 2015-02-02
__HAVE_ARCH_CMPXCHG on ARM? · Nathan Sullivan <hidden> · 2015-02-03
__HAVE_ARCH_CMPXCHG on ARM? · Will Deacon <hidden> · 2015-02-03
__HAVE_ARCH_CMPXCHG on ARM? · Josh Cartwright <hidden> · 2015-02-03
__HAVE_ARCH_CMPXCHG on ARM? · bigeasy@linutronix.de (Sebastian Andrzej Siewior) · 2015-02-18
__HAVE_ARCH_CMPXCHG on ARM? · Josh Cartwright <hidden> · 2015-02-18
__HAVE_ARCH_CMPXCHG on ARM? · bigeasy@linutronix.de (Sebastian Andrzej Siewior) · 2015-02-18

From: Josh Cartwright <hidden>
Date: 2015-02-18 16:34:12
Also in: linux-arch, linux-rt-users

On Wed, Feb 18, 2015 at 11:44:59AM +0100, Sebastian Andrzej Siewior wrote:

* Josh Cartwright | 2015-02-03 13:27:30 [-0600]:

quoted

                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