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-rw-r--r--include/linux/list.h9
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)
{