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author | Manfred Spraul <manfred@colorfullife.com> | 2020-02-03 17:34:29 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-02-04 03:05:23 +0000 |
commit | 39323c64b8a95d10ddc66dc815dd14efdddf6777 (patch) | |
tree | 2221c4326ef7fa9ff3f4e773f51c38246c6f64ca /ipc | |
parent | 92917998849eea951707c8fea2dc3007bb2ad2cd (diff) | |
download | linux-stable-39323c64b8a95d10ddc66dc815dd14efdddf6777.tar.gz linux-stable-39323c64b8a95d10ddc66dc815dd14efdddf6777.tar.bz2 linux-stable-39323c64b8a95d10ddc66dc815dd14efdddf6777.zip |
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>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions