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| author | Chuck Ebbert <76306.1226@compuserve.com> | 2005-07-02 21:28:21 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-07-31 01:06:10 -0400 |
| commit | d2ae1d2ff9282ca061b6f5244eee4c28ee2b3ffa (patch) | |
| tree | 12bc14f038ed644faa6299912453f2784f755315 /drivers/net/loopback.c | |
| parent | 2f761478a2b436efa23659b4d5c826e53b11f91a (diff) | |
| download | lwn-d2ae1d2ff9282ca061b6f5244eee4c28ee2b3ffa.tar.gz lwn-d2ae1d2ff9282ca061b6f5244eee4c28ee2b3ffa.zip | |
[PATCH] loopback: #ifdef the TSO code
This patch #ifdefs the TSO code in the loopback driver.
Saves ~800 bytes of text on i386 and avoids a conditional in the fast path.
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/loopback.c')
| -rw-r--r-- | drivers/net/loopback.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index b33111e21313..c1e3cee8ec33 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -68,6 +68,7 @@ static DEFINE_PER_CPU(struct net_device_stats, loopback_stats); * of largesending device modulo TCP checksum, which is ignored for loopback. */ +#ifdef LOOPBACK_TSO static void emulate_large_send_offload(struct sk_buff *skb) { struct iphdr *iph = skb->nh.iph; @@ -119,6 +120,7 @@ static void emulate_large_send_offload(struct sk_buff *skb) dev_kfree_skb(skb); } +#endif /* LOOPBACK_TSO */ /* * The higher levels take care of making this non-reentrant (it's @@ -136,6 +138,7 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev) skb->ip_summed = CHECKSUM_UNNECESSARY; #endif +#ifdef LOOPBACK_TSO if (skb_shinfo(skb)->tso_size) { BUG_ON(skb->protocol != htons(ETH_P_IP)); BUG_ON(skb->nh.iph->protocol != IPPROTO_TCP); @@ -143,7 +146,7 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev) emulate_large_send_offload(skb); return 0; } - +#endif dev->last_rx = jiffies; lb_stats = &per_cpu(loopback_stats, get_cpu()); @@ -209,6 +212,9 @@ struct net_device loopback_dev = { .rebuild_header = eth_rebuild_header, .flags = IFF_LOOPBACK, .features = NETIF_F_SG|NETIF_F_FRAGLIST +#ifdef LOOPBACK_TSO + |NETIF_F_TSO +#endif |NETIF_F_NO_CSUM|NETIF_F_HIGHDMA |NETIF_F_LLTX, .ethtool_ops = &loopback_ethtool_ops, |