From: Jan Kara <jack@suse.cz>
Date: Wed, 2 Aug 2017 08:25:21 +0000 (+0200)
Subject: block: Add comment to submit_bio_wait()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3d289d68823cbfe86d326400c5386feda777f092;p=openwrt%2Fstaging%2Fblogic.git

block: Add comment to submit_bio_wait()

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>
---

diff --git a/block/bio.c b/block/bio.c
index 9a63597aaacc..e241bbc49f14 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -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
  * 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)
 {