diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 4666a1a92a31b..36bccc1285b3f 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1539,6 +1539,8 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
  * We queue the work to a specific CPU, the caller must ensure it
  * can't go away.  Callers that fail to ensure that the specified
  * CPU cannot go away will execute on a randomly chosen CPU.
+ * But note well that callers specifying a CPU that never has been
+ * online will get a splat.
  *
  * Return: %false if @work was already on a queue, %true otherwise.
  */