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Commit 7e80c124 authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

bridge: simplify multicast_add_router 



By coding slightly differently, there are only two cases
to deal with: add at head and add after previous entry.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent dcd79aeb

net/bridge/br_multicast.c

+11 −8
Original line number Diff line number Diff line
@@ -1039,22 +1039,25 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br, 
}

#endif



/*

 * Add port to rotuer_list

 *  list is maintained ordered by pointer value

 *  and locked by br->multicast_lock and RCU

 */

static void br_multicast_add_router(struct net_bridge *br,

				    struct net_bridge_port *port)

{

	struct net_bridge_port *p;

	struct hlist_node *n, *last = NULL;

	struct hlist_node *n, *slot = NULL;



	hlist_for_each_entry(p, n, &br->router_list, rlist) {

		if ((unsigned long) port >= (unsigned long) p) {

			hlist_add_before_rcu(n, &port->rlist);

			return;

		}

		last = n;

		if ((unsigned long) port >= (unsigned long) p)

			break;

		slot = n;

	}



	if (last)

		hlist_add_after_rcu(last, &port->rlist);

	if (slot)

		hlist_add_after_rcu(slot, &port->rlist);

	else

		hlist_add_head_rcu(&port->rlist, &br->router_list);

}