From: Geliang Tang <geliangtang@gmail.com>
Date: Wed, 22 Feb 2017 23:45:52 +0000 (-0800)
Subject: mm/backing-dev.c: use rb_entry()
X-Git-Tag: v4.11-rc1~106^2~20
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bc71226b0690c21bdf50c9c9d08c5dc9ef98764e;p=karo-tx-linux.git

mm/backing-dev.c: use rb_entry()

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

Link: http://lkml.kernel.org/r/671275de093d93ddc7c6f77ddc0d357149691a39.1484306840.git.geliangtang@gmail.com
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 39ce616a9d71..6d861d090e9f 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -411,8 +411,8 @@ retry:
 
 	while (*node != NULL) {
 		parent = *node;
-		congested = container_of(parent, struct bdi_writeback_congested,
-					 rb_node);
+		congested = rb_entry(parent, struct bdi_writeback_congested,
+				     rb_node);
 		if (congested->blkcg_id < blkcg_id)
 			node = &parent->rb_left;
 		else if (congested->blkcg_id > blkcg_id)