From dc9c5fbb5763c0492d8bb62776ee2e44a8658d7f Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 29 May 2013 05:02:56 +0000 Subject: [PATCH] --- yaml --- r: 376678 b: refs/heads/master c: 6d7581e62f8be462440d7b22c6361f7c9fa4902b h: refs/heads/master v: v3 --- [refs] | 2 +- trunk/include/linux/list.h | 11 +++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/[refs] b/[refs] index 3b245d765e77..0fa053684e82 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: e4e8536f65b51ce91c30588b0925872bdfc60d03 +refs/heads/master: 6d7581e62f8be462440d7b22c6361f7c9fa4902b diff --git a/trunk/include/linux/list.h b/trunk/include/linux/list.h index 6a1f8df9144b..b83e5657365a 100644 --- a/trunk/include/linux/list.h +++ b/trunk/include/linux/list.h @@ -361,6 +361,17 @@ static inline void list_splice_tail_init(struct list_head *list, #define list_first_entry(ptr, type, member) \ list_entry((ptr)->next, type, member) +/** + * list_first_entry_or_null - get the first element from a list + * @ptr: the list head to take the element from. + * @type: the type of the struct this is embedded in. + * @member: the name of the list_struct within the struct. + * + * Note that if the list is empty, it returns NULL. + */ +#define list_first_entry_or_null(ptr, type, member) \ + (!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL) + /** * list_for_each - iterate over a list * @pos: the &struct list_head to use as a loop cursor.