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-rw-r--r--include/linux/seqlock.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index 7973a821ac58..ead97654c4e9 100644
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -277,7 +277,10 @@ static inline void raw_write_seqcount_barrier(seqcount_t *s)
277 277
278static inline int raw_read_seqcount_latch(seqcount_t *s) 278static inline int raw_read_seqcount_latch(seqcount_t *s)
279{ 279{
280 return lockless_dereference(s)->sequence; 280 int seq = READ_ONCE(s->sequence);
281 /* Pairs with the first smp_wmb() in raw_write_seqcount_latch() */
282 smp_read_barrier_depends();
283 return seq;
281} 284}
282 285
283/** 286/**
@@ -331,7 +334,7 @@ static inline int raw_read_seqcount_latch(seqcount_t *s)
331 * unsigned seq, idx; 334 * unsigned seq, idx;
332 * 335 *
333 * do { 336 * do {
334 * seq = lockless_dereference(latch)->seq; 337 * seq = raw_read_seqcount_latch(&latch->seq);
335 * 338 *
336 * idx = seq & 0x01; 339 * idx = seq & 0x01;
337 * entry = data_query(latch->data[idx], ...); 340 * entry = data_query(latch->data[idx], ...);