[ 3.5.y.z extended stable ] Patch "xen-netfront: remove unused variable `extra'" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    xen-netfront: remove unused variable `extra'

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 9be46220bb9a6fed340d2269e8fe3d853dfc0fa5 Mon Sep 17 00:00:00 2001
From: Wei Liu <wei.liu2 at citrix.com>
Date: Mon, 25 Mar 2013 01:08:17 +0000
Subject: [PATCH] xen-netfront: remove unused variable `extra'

commit e2d617c0ccf658a55552955f07018ecfa0135210 upstream.

This variable is supposed to hold reference to the last extra_info in the
loop. However there is only type of extra info here and the loop to process
extra info is missing, so this variable is never used and causes confusion.

Remove it at the moment. We can add it back when necessary.

Signed-off-by: Wei Liu <wei.liu2 at citrix.com>
Reviewed-by: David Vrabel <david.vrabel at citrix.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/xen-netfront.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 3089990..0ab0da4 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -481,7 +481,6 @@ static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct netfront_info *np = netdev_priv(dev);
 	struct netfront_stats *stats = this_cpu_ptr(np->stats);
 	struct xen_netif_tx_request *tx;
-	struct xen_netif_extra_info *extra;
 	char *data = skb->data;
 	RING_IDX i;
 	grant_ref_t ref;
@@ -525,7 +524,6 @@ static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	tx->gref = np->grant_tx_ref[id] = ref;
 	tx->offset = offset;
 	tx->size = len;
-	extra = NULL;

 	tx->flags = 0;
 	if (skb->ip_summed == CHECKSUM_PARTIAL)
@@ -541,10 +539,7 @@ static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		gso = (struct xen_netif_extra_info *)
 			RING_GET_REQUEST(&np->tx, ++i);

-		if (extra)
-			extra->flags |= XEN_NETIF_EXTRA_FLAG_MORE;
-		else
-			tx->flags |= XEN_NETTXF_extra_info;
+		tx->flags |= XEN_NETTXF_extra_info;

 		gso->u.gso.size = skb_shinfo(skb)->gso_size;
 		gso->u.gso.type = XEN_NETIF_GSO_TYPE_TCPV4;
@@ -553,7 +548,6 @@ static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)

 		gso->type = XEN_NETIF_EXTRA_TYPE_GSO;
 		gso->flags = 0;
-		extra = gso;
 	}

 	np->tx.req_prod_pvt = i + 1;
--
1.8.1.2