diff --git a/[refs] b/[refs]
index 76f17120d1dd..0a44e108a020 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0d94df56963251d896e87c6197f6df132593232b
+refs/heads/master: d07fe82c24daab2360e2790f488bcffa7db74825
diff --git a/trunk/kernel/rtmutex.c b/trunk/kernel/rtmutex.c
index d2ef13b485e7..3e13a1e5856f 100644
--- a/trunk/kernel/rtmutex.c
+++ b/trunk/kernel/rtmutex.c
@@ -7,6 +7,8 @@
  *  Copyright (C) 2005-2006 Timesys Corp., Thomas Gleixner <tglx@timesys.com>
  *  Copyright (C) 2005 Kihon Technologies Inc., Steven Rostedt
  *  Copyright (C) 2006 Esben Nielsen
+ *
+ *  See Documentation/rt-mutex-design.txt for details.
  */
 #include <linux/spinlock.h>
 #include <linux/module.h>