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net: skb_defer_rx_timestamp should check for phydev before setting up…
… classify This change makes it so that the call skb_defer_rx_timestamp will first check for a phydev before going in and manipulating the skb->data and skb->len values. By doing this we can avoid unnecessary work on network devices that don't support phydev. As a result we reduce the total instruction count needed to process this on most devices. Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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