diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 56b7cf898f10..21721faa923c 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -913,6 +913,7 @@ struct task_struct *wq_worker_sleeping(struct task_struct *task)
 
 /**
  * wq_worker_last_func - retrieve worker's last work function
+ * @task: Task to retrieve last work function of.
  *
  * Determine the last function a worker executed. This is called from
  * the scheduler to get a worker's last known identity.