ipv6: use dev_sw_netstats_rx_add()

use new helper for netstats settings
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ip6_vti.c

@@ -347,7 +347,6 @@ static int vti6_rcv_cb(struct sk_buff *skb, int err)
 {
 	unsigned short family;
 	struct net_device *dev;
-	struct pcpu_sw_netstats *tstats;
 	struct xfrm_state *x;
 	const struct xfrm_mode *inner_mode;
 	struct ip6_tnl *t = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6;
@@ -390,12 +389,7 @@ static int vti6_rcv_cb(struct sk_buff *skb, int err)
 
 	skb_scrub_packet(skb, !net_eq(t->net, dev_net(skb->dev)));
 	skb->dev = dev;
-
-	tstats = this_cpu_ptr(dev->tstats);
-	u64_stats_update_begin(&tstats->syncp);
-	tstats->rx_packets++;
-	tstats->rx_bytes += skb->len;
-	u64_stats_update_end(&tstats->syncp);
+	dev_sw_netstats_rx_add(dev, skb->len);
 
 	return 0;
 }