[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>
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index b33111e..c1e3cee 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -68,6 +68,7 @@
* 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 @@
dev_kfree_skb(skb);
}
+#endif /* LOOPBACK_TSO */
/*
* The higher levels take care of making this non-reentrant (it's
@@ -136,6 +138,7 @@
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 @@
emulate_large_send_offload(skb);
return 0;
}
-
+#endif
dev->last_rx = jiffies;
lb_stats = &per_cpu(loopback_stats, get_cpu());
@@ -209,6 +212,9 @@
.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,