From 0fc09411faf0ee0b689b4748eecf8358925f4da5 Mon Sep 17 00:00:00 2001
From: Li Zefan <lizefan@huawei.com>
Date: Tue, 15 Jan 2013 14:10:57 +0800
Subject: [PATCH] --- yaml --- r: 350352 b: refs/heads/master c:
 27e89ae5d6e94e30231ee89a7736f62d84ba4c6f h: refs/heads/master v: v3

---
 [refs]                | 2 +-
 trunk/kernel/cpuset.c | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/[refs] b/[refs]
index b6e074816300..aba58498ae7b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f47b89c73ce7535339525c141a6a114db333f0bd
+refs/heads/master: 27e89ae5d6e94e30231ee89a7736f62d84ba4c6f
diff --git a/trunk/kernel/cpuset.c b/trunk/kernel/cpuset.c
index 6aa5bbb5f33b..1a675e446ef2 100644
--- a/trunk/kernel/cpuset.c
+++ b/trunk/kernel/cpuset.c
@@ -2678,15 +2678,15 @@ static int proc_cpuset_show(struct seq_file *m, void *unused_v)
 		goto out_free;
 
 	retval = -EINVAL;
-	mutex_lock(&cpuset_mutex);
+	rcu_read_lock();
 	css = task_subsys_state(tsk, cpuset_subsys_id);
 	retval = cgroup_path(css->cgroup, buf, PAGE_SIZE);
+	rcu_read_unlock();
 	if (retval < 0)
-		goto out_unlock;
+		goto out_put_task;
 	seq_puts(m, buf);
 	seq_putc(m, '\n');
-out_unlock:
-	mutex_unlock(&cpuset_mutex);
+out_put_task:
 	put_task_struct(tsk);
 out_free:
 	kfree(buf);