On Mon, Jul 13, 2015 at 01:15:04PM +0100, Will Deacon wrote: > smp_mb__after_unlock_lock is used to promote an UNLOCK + LOCK sequence > into a full memory barrier. > > However: > - The barrier only applies to UNLOCK + LOCK, not general > RELEASE + ACQUIRE operations No it does too; note that on ppc both acquire and release use lwsync and two lwsyncs do not make a sync. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
