[PATCH] PPC64 iSeries virtual ethernet minor optimisation

[Stephen Rothwell]

Hi Linus, Andrew,

This has only been adjusted by me to apply after David Gibson's patch to
add a watchdog timer.  Please apply.

Name: Minor Optimization for iseries_veth Driver
Status: Untested
Version: ppc64
Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> (a)

The iseries_veth driver does skb_clone, it should only need to
skb_get, which is cheaper.  Should help performance a little.

Signed-off-by: Stephen Rothwell <sfr at canb.auug.org.au>

--
Cheers,
Stephen Rothwell                    sfr at canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
-------------- next part --------------
diff -ruN 2.6.7-rc2.wd/drivers/net/iseries_veth.c 2.6.7-rc2.wd.rusty/drivers/net/iseries_veth.c
--- 2.6.7-rc2.wd/drivers/net/iseries_veth.c	2004-05-31 17:49:10.000000000 +1000
+++ 2.6.7-rc2.wd.rusty/drivers/net/iseries_veth.c	2004-05-31 18:10:30.000000000 +1000
@@ -983,19 +983,10 @@
 	int rc;

 	for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
-		struct sk_buff *clone;
-
 		if ((lpmask & (1 << i)) == 0)
 			continue;

-		clone = skb_clone(skb, GFP_ATOMIC);
-		if (! clone) {
-			veth_error("%s: skb_clone failed %p\n",
-				   dev->name, skb);
-			continue;
-		}
-
-		rc = veth_transmit_to_one(clone, i, dev);
+		rc = veth_transmit_to_one(skb_get(skb), i, dev);
 		if (! rc)
 			lpmask &= ~(1<<i);
 	}