linux-kernel - [PATCH] dm bio prison: use rb

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Date:   Fri, 20 Jan 2017 22:36:54 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Shaohua Li <shli@...nel.org>
Cc:     Geliang Tang <geliangtang@...il.com>, linux-raid@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] dm bio prison: use rb_entry()

To make the code clearer, use rb_entry() instead of container_of() to
deal with rbtree.

Signed-off-by: Geliang Tang <geliangtang@...il.com>
---
 drivers/md/dm-bio-prison.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-bio-prison.c b/drivers/md/dm-bio-prison.c
index 03af174..a2c8a9e 100644
--- a/drivers/md/dm-bio-prison.c
+++ b/drivers/md/dm-bio-prison.c
@@ -115,7 +115,7 @@ static int __bio_detain(struct dm_bio_prison *prison,
 
 	while (*new) {
 		struct dm_bio_prison_cell *cell =
-			container_of(*new, struct dm_bio_prison_cell, node);
+			rb_entry(*new, struct dm_bio_prison_cell, node);
 
 		r = cmp_keys(key, &cell->key);
 
-- 
2.9.3