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>
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@ -278,9 +278,8 @@ static inline void raw_write_seqcount_barrier(seqcount_t *s)
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static inline int raw_read_seqcount_latch(seqcount_t *s)
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{
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int seq = READ_ONCE(s->sequence);
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/* Pairs with the first smp_wmb() in raw_write_seqcount_latch() */
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smp_read_barrier_depends();
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int seq = READ_ONCE(s->sequence); /* ^^^ */
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return seq;
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}
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