tcp_stream_alloc_skb
struct sk_buff *tcp_stream_alloc_skb(struct sock *sk, gfp_t gfp,
skb = tcp_stream_alloc_skb(sk, sk->sk_allocation,
buff = tcp_stream_alloc_skb(sk, gfp, true);
buff = tcp_stream_alloc_skb(sk, gfp, true);
nskb = tcp_stream_alloc_skb(sk, GFP_ATOMIC, false);
syn_data = tcp_stream_alloc_skb(sk, sk->sk_allocation, false);
buff = tcp_stream_alloc_skb(sk, sk->sk_allocation, true);