ceph: fix iput race when queueing inode work

[mirror_ubuntu-artful-kernel.git] / kernel / pid.c

diff --git a/kernel/pid.c b/kernel/pid.c
index e432057f3b2147873f0de30ad00b16bbaecbedb1..8cafe7e72ad2b83ff0bc7f7d0e12b710e6f9a519 100644 (file)
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -418,7 +418,9 @@ EXPORT_SYMBOL(pid_task);
  */
 struct task_struct *find_task_by_pid_ns(pid_t nr, struct pid_namespace *ns)
 {
-       rcu_lockdep_assert(rcu_read_lock_held());
+       rcu_lockdep_assert(rcu_read_lock_held(),
+                          "find_task_by_pid_ns() needs rcu_read_lock()"
+                          " protection");
        return pid_task(find_pid_ns(nr, ns), PIDTYPE_PID);
 }