gtp: use dev_sw_netstats_rx_add()

use new helper for netstats settings
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Harald Welte <laforge@gnumonks.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/gtp.c

@@ -182,8 +182,6 @@ static bool gtp_check_ms(struct sk_buff *skb, struct pdp_ctx *pctx,
 static int gtp_rx(struct pdp_ctx *pctx, struct sk_buff *skb,
 			unsigned int hdrlen, unsigned int role)
 {
-	struct pcpu_sw_netstats *stats;
-
 	if (!gtp_check_ms(skb, pctx, hdrlen, role)) {
 		netdev_dbg(pctx->dev, "No PDP ctx for this MS\n");
 		return 1;
@@ -204,11 +202,7 @@ static int gtp_rx(struct pdp_ctx *pctx, struct sk_buff *skb,
 
 	skb->dev = pctx->dev;
 
-	stats = this_cpu_ptr(pctx->dev->tstats);
-	u64_stats_update_begin(&stats->syncp);
-	stats->rx_packets++;
-	stats->rx_bytes += skb->len;
-	u64_stats_update_end(&stats->syncp);
+	dev_sw_netstats_rx_add(pctx->dev, skb->len);
 
 	netif_rx(skb);
 	return 0;