diff --git a/kernel/padata.c b/kernel/padata.c
index 6f10eb285ece5136177345ba368493a3b66932a9..78750882b2ab1ee04c78298193e42137bee6a603 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -1,6 +1,8 @@
 /*
  * padata.c - generic interface to process data streams in parallel
  *
+ * See Documentation/padata.txt for an api documentation.
+ *
  * Copyright (C) 2008, 2009 secunet Security Networks AG
  * Copyright (C) 2008, 2009 Steffen Klassert <steffen.klassert@secunet.com>
  *