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 <nborisov@xxxxxxxx> Reviewed-by: David Sterba <dsterba@xxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
