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-rw-r--r--include/linux/list.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/list.h b/include/linux/list.h
index 6a1f8df9144b..b83e5657365a 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -362,6 +362,17 @@ static inline void list_splice_tail_init(struct list_head *list,
362 list_entry((ptr)->next, type, member) 362 list_entry((ptr)->next, type, member)
363 363
364/** 364/**
365 * list_first_entry_or_null - get the first element from a list
366 * @ptr: the list head to take the element from.
367 * @type: the type of the struct this is embedded in.
368 * @member: the name of the list_struct within the struct.
369 *
370 * Note that if the list is empty, it returns NULL.
371 */
372#define list_first_entry_or_null(ptr, type, member) \
373 (!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)
374
375/**
365 * list_for_each - iterate over a list 376 * list_for_each - iterate over a list
366 * @pos: the &struct list_head to use as a loop cursor. 377 * @pos: the &struct list_head to use as a loop cursor.
367 * @head: the head for your list. 378 * @head: the head for your list.