diff --git a/[refs] b/[refs]
index 40ceccf9449f..f78931a7e433 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 401dea7f7ade662b77c33ce2498fb5b4f97cb29c
+refs/heads/master: 17a801f4bfeb8d55df1b05fa7adb16ada504e765
diff --git a/trunk/lib/list_debug.c b/trunk/lib/list_debug.c
index 3810b481f940..23a5e031cd8b 100644
--- a/trunk/lib/list_debug.c
+++ b/trunk/lib/list_debug.c
@@ -31,6 +31,9 @@ void __list_add(struct list_head *new,
 		"list_add corruption. prev->next should be "
 		"next (%p), but was %p. (prev=%p).\n",
 		next, prev->next, prev);
+	WARN(new == prev || new == next,
+	     "list_add double add: new=%p, prev=%p, next=%p.\n",
+	     new, prev, next);
 	next->prev = new;
 	new->next = next;
 	new->prev = prev;