From 7e80c124485b73146deadce14fd4da2054581806 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Tue, 27 Apr 2010 15:01:04 +0000 Subject: [PATCH] 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: Stephen Hemminger Signed-off-by: David S. Miller --- net/bridge/br_multicast.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index fcba313f1894..d63868c9b2c0 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -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); } -- 2.20.1