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Commit bb08f76d authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove list_for_each_continue_rcu() 



The list_for_each_continue_rcu() macro is no longer used, so this commit
removes it.  The list_for_each_entry_continue_rcu() macro should be
used instead.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 878d7439

Documentation/RCU/checklist.txt

+8 −9
Original line number Diff line number Diff line
@@ -271,15 +271,14 @@ over a rather long period of time, but improvements are always welcome! 
	The same cautions apply to call_rcu_bh() and call_rcu_sched().



9.	All RCU list-traversal primitives, which include

	rcu_dereference(), list_for_each_entry_rcu(),

	list_for_each_continue_rcu(), and list_for_each_safe_rcu(),

	must be either within an RCU read-side critical section or

	must be protected by appropriate update-side locks.  RCU

	read-side critical sections are delimited by rcu_read_lock()

	and rcu_read_unlock(), or by similar primitives such as

	rcu_read_lock_bh() and rcu_read_unlock_bh(), in which case

	the matching rcu_dereference() primitive must be used in order

	to keep lockdep happy, in this case, rcu_dereference_bh().

	rcu_dereference(), list_for_each_entry_rcu(), and

	list_for_each_safe_rcu(), must be either within an RCU read-side

	critical section or must be protected by appropriate update-side

	locks.	RCU read-side critical sections are delimited by

	rcu_read_lock() and rcu_read_unlock(), or by similar primitives

	such as rcu_read_lock_bh() and rcu_read_unlock_bh(), in which

	case the matching rcu_dereference() primitive must be used in

	order to keep lockdep happy, in this case, rcu_dereference_bh().



	The reason that it is permissible to use RCU list-traversal

	primitives when the update-side lock is held is that doing so

Documentation/RCU/whatisRCU.txt

+1 −3
Original line number Diff line number Diff line
@@ -789,9 +789,7 @@ RCU list traversal: 
	list_for_each_entry_rcu

	hlist_for_each_entry_rcu

	hlist_nulls_for_each_entry_rcu



	list_for_each_continue_rcu	(to be deprecated in favor of new

					 list_for_each_entry_continue_rcu)

	list_for_each_entry_continue_rcu



RCU pointer/list update:

include/linux/rculist.h

+0 −17
Original line number Diff line number Diff line
@@ -286,23 +286,6 @@ static inline void list_splice_init_rcu(struct list_head *list, 
		&pos->member != (head); \

		pos = list_entry_rcu(pos->member.next, typeof(*pos), member))





/**

 * list_for_each_continue_rcu

 * @pos:	the &struct list_head to use as a loop cursor.

 * @head:	the head for your list.

 *

 * Iterate over an rcu-protected list, continuing after current point.

 *

 * This list-traversal primitive may safely run concurrently with

 * the _rcu list-mutation primitives such as list_add_rcu()

 * as long as the traversal is guarded by rcu_read_lock().

 */

#define list_for_each_continue_rcu(pos, head) \

	for ((pos) = rcu_dereference_raw(list_next_rcu(pos)); \

		(pos) != (head); \

		(pos) = rcu_dereference_raw(list_next_rcu(pos)))



/**

 * list_for_each_entry_continue_rcu - continue iteration over list of given type

 * @pos:	the type * to use as a loop cursor.