linux-kernel - [PATCH] blkcg: remove redundant code in blkcg_css

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Message-ID: <5546C02C.3060803@huawei.com>
Date:	Mon, 4 May 2015 08:41:16 +0800
From:	Zefan Li <lizefan@...wei.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Jens Axboe <axboe@...nel.dk>, LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>
Subject: [PATCH] blkcg: remove redundant code in blkcg_css_free()

The check was needed only when we supported modular cgroup subsystem.

Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 block/blk-cgroup.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 0ac817b..92b7edd 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -814,9 +814,7 @@ static void blkcg_css_offline(struct cgroup_subsys_state *css)
 static void blkcg_css_free(struct cgroup_subsys_state *css)
 {
 	struct blkcg *blkcg = css_to_blkcg(css);
-
-	if (blkcg != &blkcg_root)
-		kfree(blkcg);
+	kfree(blkcg);
 }
 
 static struct cgroup_subsys_state *
-- 
1.9.1

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