RE: [PATCH v2 net-next 4/5] sunvnet: count multicast packets

[David Laight]

From: Shannon Nelson
> Sent: 14 March 2017 17:25
...
> +     if (unlikely(is_multicast_ether_addr(eth_hdr(skb)->h_dest)))
> +             dev->stats.multicast++;

I'd guess that:
        dev->stats.multicast += is_multicast_ether_addr(eth_hdr(skb)->h_dest);
generates faster code.
Especially if is_multicast_ether_addr(x) is (*x >> 7).

        David