On Wed, Feb 14, 2018 at 10:53:36AM +0200, Nikolay Borisov wrote:
> Using any kind of memory barriers around atomic operations which have
> a return value is redundant, since those operations themselves are
> fully ordered. atomic_t.txt states:
>     - RMW operations that have a return value are fully ordered;
>     Fully ordered primitives are ordered against everything prior and
>     everything subsequent. Therefore a fully ordered primitive is like
>     having an smp_mb() before and an smp_mb() after the primitive.
> Given this let's replace the extra memory barriers with comments.
> Signed-off-by: Nikolay Borisov <nbori...@suse.com>

Reviewed-by: David Sterba <dste...@suse.com>
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