[NET] drivers/net: statistics cleanup #1 -- save memory and shrink code

We now have struct net_device_stats embedded in struct net_device,
and the default ->get_stats() hook does the obvious thing for us.

Run through drivers/net/* and remove the driver-local storage of
statistics, and driver-local ->get_stats() hook where applicable.

This was just the low-hanging fruit in drivers/net; plenty more drivers
remain to be updated.

[ Resolved conflicts with napi_struct changes and fix sunqe build
  regression... -DaveM ]

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 15 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 8b3ec33..d279151 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -110,7 +110,7 @@ static int tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
 
 			/* We won't see all dropped packets individually, so overrun
 			 * error is more appropriate. */
-			tun->stats.tx_fifo_errors++;
+			dev->stats.tx_fifo_errors++;
 		} else {
 			/* Single queue mode.
 			 * Driver handles dropping of all packets itself. */
@@ -129,7 +129,7 @@ static int tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
 	return 0;
 
 drop:
-	tun->stats.tx_dropped++;
+	dev->stats.tx_dropped++;
 	kfree_skb(skb);
 	return 0;
 }
@@ -172,12 +172,6 @@ tun_net_mclist(struct net_device *dev)
 	}
 }
 
-static struct net_device_stats *tun_net_stats(struct net_device *dev)
-{
-	struct tun_struct *tun = netdev_priv(dev);
-	return &tun->stats;
-}
-
 /* Initialize net device. */
 static void tun_net_init(struct net_device *dev)
 {
@@ -250,14 +244,14 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
 		align = NET_IP_ALIGN;
 
 	if (!(skb = alloc_skb(len + align, GFP_KERNEL))) {
-		tun->stats.rx_dropped++;
+		tun->dev->stats.rx_dropped++;
 		return -ENOMEM;
 	}
 
 	if (align)
 		skb_reserve(skb, align);
 	if (memcpy_fromiovec(skb_put(skb, len), iv, len)) {
-		tun->stats.rx_dropped++;
+		tun->dev->stats.rx_dropped++;
 		kfree_skb(skb);
 		return -EFAULT;
 	}
@@ -279,8 +273,8 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
 	netif_rx_ni(skb);
 	tun->dev->last_rx = jiffies;
 
-	tun->stats.rx_packets++;
-	tun->stats.rx_bytes += len;
+	tun->dev->stats.rx_packets++;
+	tun->dev->stats.rx_bytes += len;
 
 	return count;
 }
@@ -336,8 +330,8 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun,
 	skb_copy_datagram_iovec(skb, 0, iv, len);
 	total += len;
 
-	tun->stats.tx_packets++;
-	tun->stats.tx_bytes += len;
+	tun->dev->stats.tx_packets++;
+	tun->dev->stats.tx_bytes += len;
 
 	return total;
 }
@@ -438,7 +432,6 @@ static void tun_setup(struct net_device *dev)
 	dev->open = tun_net_open;
 	dev->hard_start_xmit = tun_net_xmit;
 	dev->stop = tun_net_close;
-	dev->get_stats = tun_net_stats;
 	dev->ethtool_ops = &tun_ethtool_ops;
 	dev->destructor = free_netdev;
 }