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authorManfred Spraul <manfred@colorfullife.com>2020-02-03 17:34:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-02-04 03:05:23 +0000
commit39323c64b8a95d10ddc66dc815dd14efdddf6777 (patch)
tree2221c4326ef7fa9ff3f4e773f51c38246c6f64ca /ipc
parent92917998849eea951707c8fea2dc3007bb2ad2cd (diff)
downloadlinux-39323c64b8a95d10ddc66dc815dd14efdddf6777.tar.bz2
smp_mb__{before,after}_atomic(): update Documentation
When adding the _{acquire|release|relaxed}() variants of some atomic operations, it was forgotten to update Documentation/memory_barrier.txt: smp_mb__{before,after}_atomic() is now intended for all RMW operations that do not imply a memory barrier. 1) smp_mb__before_atomic(); atomic_add(); 2) smp_mb__before_atomic(); atomic_xchg_relaxed(); 3) smp_mb__before_atomic(); atomic_fetch_add_relaxed(); Invalid would be: smp_mb__before_atomic(); atomic_set(); In addition, the patch splits the long sentence into multiple shorter sentences. Link: http://lkml.kernel.org/r/20191020123305.14715-2-manfred@colorfullife.com Fixes: 654672d4ba1a ("locking/atomics: Add _{acquire|release|relaxed}() variants of some atomic operations") Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Acked-by: Waiman Long <longman@redhat.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: <1vier1@web.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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