Re: [PATCH v9 03/19] qspinlock: Add pending bit

[Peter Zijlstra]

On Thu, Apr 17, 2014 at 05:20:31PM -0400, Waiman Long wrote:
> >>+	while ((val = atomic_read(&lock->val))&  _Q_LOCKED_MASK)
> >>+		arch_mutex_cpu_relax();
> >That was a cpu_relax().
> 
> Yes, but arch_mutex_cpu_relax() is the same as cpu_relax() for x86.

Yeah, so why bother typing more?

Let the s390 people sort that if/when they try and make this work for
them.
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