This reverts commit 
ff65e8275f6c96a5eda57493bd84c4555decf7b3.
As explained by Stephen Hemminger, the traversal doesn't require
RCU handling as we hold a lock.
The list addition et al. calls, on the other hand, do.
Signed-off-by: David S. Miller <davem@davemloft.net>
        struct net_bridge_port *p;
        struct hlist_node *n, *last = NULL;
 
-       hlist_for_each_entry_rcu(p, n, &br->router_list, rlist) {
+       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;