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Commit 254245d2 authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

netdev: add netdev_continue_rcu 



This adds an RCU macro for continuing search, useful for some
network devices like vlan.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 856540ee

include/linux/netdevice.h

+2 −0
Original line number Diff line number Diff line
@@ -1079,6 +1079,8 @@ extern rwlock_t dev_base_lock; /* Device list lock */ 
		list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)

#define for_each_netdev_continue(net, d)		\

		list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)

#define for_each_netdev_continue_rcu(net, d)		\

	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)

#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)



static inline struct net_device *next_net_device(struct net_device *dev)

include/linux/rculist.h

+14 −0
Original line number Diff line number Diff line
@@ -261,6 +261,20 @@ static inline void list_splice_init_rcu(struct list_head *list, 
		prefetch((pos)->next), (pos) != (head); \

		(pos) = rcu_dereference((pos)->next))



/**

 * list_for_each_entry_continue_rcu - continue iteration over list of given type

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

 * @head:	the head for your list.

 * @member:	the name of the list_struct within the struct.

 *

 * Continue to iterate over list of given type, continuing after

 * the current position.

 */

#define list_for_each_entry_continue_rcu(pos, head, member) 		\

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

	     prefetch(pos->member.next), &pos->member != (head);	\

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



/**

 * hlist_del_rcu - deletes entry from hash list without re-initialization

 * @n: the element to delete from the hash list.