bridge: add RCU annotation to bridge multicast table

Add modern __rcu annotatations to bridge multicast table.
Use newer hlist macros to avoid direct access to hlist internals.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index cbfe87f..2bd11ec 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -223,7 +223,7 @@
 	struct net_bridge_port_group *p;
 	struct hlist_node *rp;
 
-	rp = rcu_dereference(br->router_list.first);
+	rp = rcu_dereference(hlist_first_rcu(&br->router_list));
 	p = mdst ? rcu_dereference(mdst->ports) : NULL;
 	while (p || rp) {
 		struct net_bridge_port *port, *lport, *rport;
@@ -242,7 +242,7 @@
 		if ((unsigned long)lport >= (unsigned long)port)
 			p = rcu_dereference(p->next);
 		if ((unsigned long)rport >= (unsigned long)port)
-			rp = rcu_dereference(rp->next);
+			rp = rcu_dereference(hlist_next_rcu(rp));
 	}
 
 	if (!prev)