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authorstephen hemminger <shemminger@vyatta.com>2010-04-27 15:01:04 +0000
committerDavid S. Miller <davem@davemloft.net>2010-04-27 18:13:53 -0700
commit7e80c124485b73146deadce14fd4da2054581806 (patch)
treeda7349b9a75f669bd317729543a51406c778727c /net/bridge/br_multicast.c
parentdcd79aebe736e88d62aeb4a7712ac0ba7cc2aa96 (diff)
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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 <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_multicast.c')
-rw-r--r--net/bridge/br_multicast.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index fcba313..d63868c 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);
}