tcp_trim_head     460 include/net/tcp.h extern int tcp_trim_head(struct sock *, struct sk_buff *, u32);
tcp_trim_head    2823 net/ipv4/tcp_input.c 	if (tcp_trim_head(sk, skb, tp->snd_una - TCP_SKB_CB(skb)->seq))
tcp_trim_head    1915 net/ipv4/tcp_output.c 		if (tcp_trim_head(sk, skb, tp->snd_una - TCP_SKB_CB(skb)->seq))