From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [net] gre: fix the inner mac header in nbma gre tunnels xmit
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Date: Thu, 11 Dec 2014 14:36:27 -0500 (EST)
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=46rom: Timo Ter=E4s <timo.teras@iki.fi>
Date: Thu, 11 Dec 2014 09:14:39 +0200

> @@ -266,6 +262,7 @@ static netdev_tx_t ipgre_xmit(struct sk_buff *skb=
,
>  		 * to gre header.
>  		 */
>  		skb_pull(skb, tunnel->hlen + sizeof(struct iphdr));
> +		skb_reset_mac_header(mac);

Please explain to me how this compiles, let alone be functionally
tested.