Re: [PATCH] btrfs: optimize barrier usage for Rmw atomics

[Nikolay Borisov]

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On 29.01.20 Ð. 20:03 Ñ., Davidlohr Bueso wrote:
> Use smp_mb__after_atomic() instead of smp_mb() and avoid the
> unnecessary barrier for non LL/SC architectures, such as x86.
> 
> Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>


While on the topic of this I've been sitting on the following local
patch for about a year, care to review the barriers: