__skb_try_recv_datagram
struct sk_buff *__skb_try_recv_datagram(struct sock *sk,
EXPORT_SYMBOL(__skb_try_recv_datagram);
skb = __skb_try_recv_datagram(sk, sk_queue, flags, off, err,
skb = __skb_try_recv_datagram(sk, &sk->sk_receive_queue, flags,