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block: Add comment to submit_bio_wait()

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submit_bio_wait() does not consume bio reference. Add comment about
that.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jan Kara 2017-08-02 10:25:21 +02:00 committed by Jens Axboe
parent b7a71e66d4
commit 3d289d6882
1 changed files with 4 additions and 0 deletions
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block/bio.c
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@ -936,6 +936,10 @@ static void submit_bio_wait_endio(struct bio *bio)
* *
* Simple wrapper around submit_bio(). Returns 0 on success, or the error from * Simple wrapper around submit_bio(). Returns 0 on success, or the error from
* bio_endio() on failure. * bio_endio() on failure.
*
* WARNING: Unlike to how submit_bio() is usually used, this function does not
* result in bio reference to be consumed. The caller must drop the reference
* on his own.
*/ */
int submit_bio_wait(struct bio *bio) int submit_bio_wait(struct bio *bio)
{ {