DEFINE_WAIT_BIT uses wake_bit_function() which is able to avoid
false-wakeups due to possible hash collisions in the bit wait table.
Signed-off-by: Jacob Wen <jian.w.wen@xxxxxxxxxx>
---
fs/block_dev.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 0ae656e022fd..ba4fad08cdaf 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1062,12 +1062,12 @@ static int bd_prepare_to_claim(struct block_device *bdev,
/* if claiming is already in progress, wait for it to finish */
if (whole->bd_claiming) {
wait_queue_head_t *wq = bit_waitqueue(&whole->bd_claiming, 0);
- DEFINE_WAIT(wait);
+ DEFINE_WAIT_BIT(wait, &whole->bd_claiming, 0);
- prepare_to_wait(wq, &wait, TASK_UNINTERRUPTIBLE);
+ prepare_to_wait(wq, &wait.wq_entry, TASK_UNINTERRUPTIBLE);
spin_unlock(&bdev_lock);
schedule();
- finish_wait(wq, &wait);
+ finish_wait(wq, &wait.wq_entry);
spin_lock(&bdev_lock);
goto retry;
}
--
2.17.1
