net: trans_start cleanups

Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Drivers can avoid one cache miss
(on dev->trans_start) in their start_xmit() handler.

Exceptions are NETIF_F_LLTX drivers

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 1 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 6b150c072a41..dbdfb1ff7ca0 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -396,7 +396,6 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
 
         /* Enqueue packet */
         skb_queue_tail(&tun->socket.sk->sk_receive_queue, skb);
-        dev->trans_start = jiffies;
 
         /* Notify and wake up reader process */
         if (tun->flags & TUN_FASYNC)