rcu: remove list_for_each_rcu()

All of the in-tree uses of list_for_each_rcu() have been converted to
list_for_each_entry_rcu(), so list_for_each_rcu() can now be removed.

Signed-off-by: Paul E. McKenney <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>

Documentation/RCU/checklist.txt

···
 		number of updates per grace period.
 
 9.	All RCU list-traversal primitives, which include
-	rcu_dereference(), list_for_each_rcu(), list_for_each_entry_rcu(),
+	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

Documentation/RCU/whatisRCU.txt

···
 	list_for_each_entry_rcu
 	hlist_for_each_entry_rcu
 
-	list_for_each_rcu		(to be deprecated in favor of
-					 list_for_each_entry_rcu)
 	list_for_each_continue_rcu	(to be deprecated in favor of new
 					 list_for_each_entry_continue_rcu)
 

include/linux/rculist.h

···
 	at->prev = last;
 }
 
-/**
- * list_for_each_rcu	-	iterate over an rcu-protected list
- * @pos:	the &struct list_head to use as a loop cursor.
- * @head:	the head for your list.
- *
- * 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_rcu(pos, head) \
-	for (pos = rcu_dereference((head)->next); \
-		prefetch(pos->next), pos != (head); \
-		pos = rcu_dereference(pos->next))
-
 #define __list_for_each_rcu(pos, head) \
 	for (pos = rcu_dereference((head)->next); \
 		pos != (head); \