1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/pid.c b/kernel/pid.c
index e432057f3b21..8cafe7e72ad2 100644
--- 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);
 }