Commit 0ad42352 authored by David Howells's avatar David Howells Committed by Linus Torvalds
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[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: default avatarDavid Howells <dhowells@redhat.com>
Cc: Patrick Mochel <mochel@digitalimplant.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent e329113c

include/linux/list.h

+14 −0
Original line number Diff line number Diff line
@@ -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.