Re: [PATCH 4/4] locking: Introduce smp_cond_acquire()

From: Peter Zijlstra
Date: Thu Nov 12 2015 - 13:02:15 EST

On Thu, Nov 12, 2015 at 07:38:07PM +0100, Oleg Nesterov wrote:
> It seems that PPC needs to define smp_mb__before_spinlock() as full mb(),
> no?

It does:

arch/powerpc/include/asm/barrier.h:#define smp_mb__before_spinlock() smp_mb()

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