[PATCH] loopback: optimize stats

This patch slightly optimizes the loopback driver's stats update.

Saves two loads, one add and one increment per packet sent.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index c1e3cee..dba7616 100644 (file)
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -151,9 +151,9 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
 
        lb_stats = &per_cpu(loopback_stats, get_cpu());
        lb_stats->rx_bytes += skb->len;
-       lb_stats->tx_bytes += skb->len;
+       lb_stats->tx_bytes = lb_stats->rx_bytes;
        lb_stats->rx_packets++;
-       lb_stats->tx_packets++;
+       lb_stats->tx_packets = lb_stats->rx_packets;
        put_cpu();
 
        netif_rx(skb);