1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/list.h b/include/linux/list.h
index dac16f99c701..b4a939b6b625 100644
--- a/include/linux/list.h
+++ b/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)
 {