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    SubjectRe: [PATCH 4/4] locking: Introduce smp_cond_acquire()
    On Thu, Nov 12, 2015 at 06:40:04AM -0800, Paul E. McKenney wrote:
    > I cannot resist suggesting that any lock that interacts with
    > spin_unlock_wait() must have all relevant acquisitions followed by
    > smp_mb__after_unlock_lock().

    Ha! that would certainly help here. But it would mean that argh64v8 also
    needs to define that, even though that is already RCsc.


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