From: David Howells Date: Tue, 10 Jan 2006 04:51:31 +0000 (-0800) Subject: [PATCH] Add list_for_each_entry_safe_reverse() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0ad42352c01788e41a33336577fdd270d8de55bb;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [PATCH] Add list_for_each_entry_safe_reverse() Add list_for_each_entry_safe_reverse() to linux/list.h This is needed by unmerged cachefs and be an as-yet-unreviewed device_shutdown() fix. Signed-off-by: David Howells Cc: Patrick Mochel Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/list.h b/include/linux/list.h index 8e3388284530..945daa1f13dd 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -435,6 +435,20 @@ static inline void list_splice_init(struct list_head *list, &pos->member != (head); \ pos = n, n = list_entry(n->member.next, typeof(*n), member)) +/** + * list_for_each_entry_safe_reverse - iterate backwards over list of given type safe against + * removal of list entry + * @pos: the type * to use as a loop counter. + * @n: another type * to use as temporary storage + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + */ +#define list_for_each_entry_safe_reverse(pos, n, head, member) \ + for (pos = list_entry((head)->prev, typeof(*pos), member), \ + n = list_entry(pos->member.prev, typeof(*pos), member); \ + &pos->member != (head); \ + pos = n, n = list_entry(n->member.prev, typeof(*n), member)) + /** * list_for_each_rcu - iterate over an rcu-protected list * @pos: the &struct list_head to use as a loop counter.