__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: bigeasy@linutronix.de (Sebastian Andrzej Siewior)
Date: 2015-02-18 10:44:59
Also in: linux-arch, linux-rt-users

* 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).

 Josh

Sebastian