Commit afa47fdf authored by Madhuparna Bhowmik's avatar Madhuparna Bhowmik Committed by Paul E. McKenney
Browse files

rculist.h: Add list_tail_rcu() 



This patch adds the macro list_tail_rcu() and documents it.

Signed-off-by: default avatarMadhuparna Bhowmik <madhuparnabhowmik04@gmail.com>
[ paulmck: Reword a bit. ]
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 459b5287

include/linux/rculist.h

+10 −0
Original line number Diff line number Diff line
@@ -40,6 +40,16 @@ static inline void INIT_LIST_HEAD_RCU(struct list_head *list) 
 */

#define list_next_rcu(list)	(*((struct list_head __rcu **)(&(list)->next)))



/**

 * list_tail_rcu - returns the prev pointer of the head of the list

 * @head: the head of the list

 *

 * Note: This should only be used with the list header, and even then

 * only if list_del() and similar primitives are not also used on the

 * list header.

 */

#define list_tail_rcu(head)	(*((struct list_head __rcu **)(&(head)->prev)))



/*

 * Check during list traversal that we are within an RCU reader

 */