[BRIDGE]: forwarding remove unneeded preempt and bh diasables

Optimize the forwarding and transmit paths. Both places are
called with bottom half/no preempt so there is no need to use
spin_lock_bh or rcu_read_lock.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 0b33a7b3a00..0c88a2ac32c 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -27,6 +27,7 @@ static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
         return &br->statistics;
 }
 
+/* net device transmit always called with no BH (preempt_disabled) */
 int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 {
         struct net_bridge *br = netdev_priv(dev);
@@ -39,7 +40,6 @@ int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
         skb->mac.raw = skb->data;
         skb_pull(skb, ETH_HLEN);
 
-        rcu_read_lock();
         if (dest[0] & 1) 
                 br_flood_deliver(br, skb, 0);
         else if ((dst = __br_fdb_get(br, dest)) != NULL)
@@ -47,7 +47,6 @@ int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
         else
                 br_flood_deliver(br, skb, 0);
 
-        rcu_read_unlock();
         return 0;
 }