From 5023bd7a804e09d0bf4937d8fecb5d85af6dba3c Mon Sep 17 00:00:00 2001 From: Simon Glass <sjg@chromium.org> Date: Wed, 5 Oct 2016 20:42:12 -0600 Subject: [PATCH] list: Add list_last_entry() to find the last entry We have list_first_entry() but in some cases it is useful to find the last item added to the list. Add a macro for this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> --- include/linux/list.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/list.h b/include/linux/list.h index b78851c3d7..5b8d1df5df 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -337,6 +337,17 @@ 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_last_entry - get the last 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 list is expected to be not empty. + */ +#define list_last_entry(ptr, type, member) \ + list_entry((ptr)->prev, type, member) + /** * list_for_each - iterate over a list * @pos: the &struct list_head to use as a loop cursor. -- 2.39.5