From: Tao Ma <boyu.mt@taobao.com>
Date: Thu, 8 Nov 2012 13:36:38 +0000 (+0800)
Subject: cgroup: set 'start' with the right value in cgroup_path.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=316eb661f125397d46f16f94e3c81ad3dc4c1233;p=linux-beck.git

cgroup: set 'start' with the right value in cgroup_path.

'start' is set to buf + buflen and do the '--' immediately.
Just set it to 'buf + buflen - 1' directly.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
---

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 3070164e2036..998ab5957c6a 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1770,9 +1770,9 @@ int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen)
 		return 0;
 	}
 
-	start = buf + buflen;
+	start = buf + buflen - 1;
 
-	*--start = '\0';
+	*start = '\0';
 	for (;;) {
 		int len = dentry->d_name.len;