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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-10-09 21:00:32 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-12-04 21:52:54 +0300 |
| commit | 98b22737847cc015a797567e32d0a4826003afbf (patch) | |
| tree | 58fe9bab30c6d8885d631365570227066d29e69a | |
| parent | 1ba9c5e6c615e8aca9041e27c40f25569704ae72 (diff) | |
| download | linux-98b22737847cc015a797567e32d0a4826003afbf.tar.xz | |
seqlock: Remove now-redundant smp_read_barrier_depends()
READ_ONCE() now implies smp_read_barrier_depends(), so this patch
removes the now-redundant smp_read_barrier_depends() from
raw_read_seqcount_latch().
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
| -rw-r--r-- | include/linux/seqlock.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index f189a8a3bbb8..bcf4cf26b8c8 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -278,9 +278,8 @@ static inline void raw_write_seqcount_barrier(seqcount_t *s) static inline int raw_read_seqcount_latch(seqcount_t *s) { - int seq = READ_ONCE(s->sequence); /* Pairs with the first smp_wmb() in raw_write_seqcount_latch() */ - smp_read_barrier_depends(); + int seq = READ_ONCE(s->sequence); /* ^^^ */ return seq; } |