From: Chuck Ebbert <76306.1226@compuserve.com>
Date: Sun, 3 Jul 2005 01:28:22 +0000 (-0400)
Subject: [PATCH] loopback: optimize stats
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=18c16c696e8b2323a306af455c686df15c717206;p=deliverable%2Flinux.git

[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 c1e3cee8ec33..dba76169e774 100644
--- 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);