diff options
Diffstat (limited to 'include/linux/list.h')
| -rw-r--r-- | include/linux/list.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/list.h b/include/linux/list.h index dac16f99c701..7627508f1b74 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -319,7 +319,16 @@ static inline int list_empty_careful(const struct list_head *head) return (next == head) && (next == head->prev); } -static inline void __list_splice(struct list_head *list, +/** + * 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(const struct list_head *list, struct list_head *head) { struct list_head *first = list->next; @@ -338,7 +347,8 @@ static inline void __list_splice(struct list_head *list, * @list: the new list to add. * @head: the place to add it in the first list. */ -static inline void list_splice(struct list_head *list, struct list_head *head) +static inline void list_splice(const struct list_head *list, + struct list_head *head) { if (!list_empty(list)) __list_splice(list, head); |