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Date: Wed, 11 Nov 2015 13:12:32 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Boqun Feng <boqun.feng@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>, mingo@kernel.org,
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        torvalds@linux-foundation.org, will.deacon@arm.com
Subject: Re: [PATCH 4/4] locking: Introduce smp_cond_acquire()
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On Wed, Nov 11, 2015 at 05:39:40PM +0800, Boqun Feng wrote:

> Just be curious, should spin_unlock_wait() semantically be an ACQUIRE?

I did wonder the same thing, it would simplify a number of things if
this were so.