diff options
| -rw-r--r-- | include/linux/ptr_ring.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/ptr_ring.h b/include/linux/ptr_ring.h index a736b16859a6..534531807d95 100644 --- a/include/linux/ptr_ring.h +++ b/include/linux/ptr_ring.h @@ -248,15 +248,15 @@ static inline bool ptr_ring_empty_bh(struct ptr_ring *r) */ static inline void __ptr_ring_zero_tail(struct ptr_ring *r, int consumer_head) { - int head = consumer_head - 1; + int head = consumer_head; /* Zero out entries in the reverse order: this way we touch the * cache line that producer might currently be reading the last; * producer won't make progress and touch other cache lines * besides the first one until we write out all entries. */ - while (likely(head >= r->consumer_tail)) - r->queue[head--] = NULL; + while (likely(head > r->consumer_tail)) + r->queue[--head] = NULL; r->consumer_tail = consumer_head; } |