diff --git a/[refs] b/[refs]
index 16485c3861ba..0fe8916ee67e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3d8d996e0ca5b4093203d3f050b0f70b5c949ae8
+refs/heads/master: 99602572812442d47403d85f376ad51298dd82a6
diff --git a/trunk/include/linux/list.h b/trunk/include/linux/list.h
index dac16f99c701..b4a939b6b625 100644
--- a/trunk/include/linux/list.h
+++ b/trunk/include/linux/list.h
@@ -319,6 +319,15 @@ static inline int list_empty_careful(const struct list_head *head)
 	return (next == head) && (next == head->prev);
 }
 
+/**
+ * list_is_singular - tests whether a list has just one entry.
+ * @head: the list to test.
+ */
+static inline int list_is_singular(const struct list_head *head)
+{
+	return !list_empty(head) && (head->next == head->prev);
+}
+
 static inline void __list_splice(struct list_head *list,
 				 struct list_head *head)
 {