X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=fs%2Fproc_namespace.c;h=73ca1740d839513468ced1b589bf5e469f391689;hb=e25b492741373542fb593477547fcf7a6b7d8b04;hp=1a81373947f33ec4e56b5e34e24814b4c267800a;hpb=619b5891903936f3e493bf8cda18a8b6664fcdd7;p=firefly-linux-kernel-4.4.55.git

diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 1a81373947f3..73ca1740d839 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -232,17 +232,15 @@ static int mounts_open_common(struct inode *inode, struct file *file,
 	if (!task)
 		goto err;
 
-	rcu_read_lock();
-	nsp = task_nsproxy(task);
+	task_lock(task);
+	nsp = task->nsproxy;
 	if (!nsp || !nsp->mnt_ns) {
-		rcu_read_unlock();
+		task_unlock(task);
 		put_task_struct(task);
 		goto err;
 	}
 	ns = nsp->mnt_ns;
 	get_mnt_ns(ns);
-	rcu_read_unlock();
-	task_lock(task);
 	if (!task->fs) {
 		task_unlock(task);
 		put_task_struct(task);