taglinefilesource code
oskb3571net/ipv4/tcp.cstruct sk_buff *oskb;  
oskb3615net/ipv4/tcp.coskb = sk->send_head;
oskb3629net/ipv4/tcp.cm = jiffies - oskb->when;  /* RTT */
oskb3653net/ipv4/tcp.coskb = sk->send_head;
oskb3654net/ipv4/tcp.cIS_SKB(oskb);
oskb3655net/ipv4/tcp.csk->send_head = oskb->link3;
oskb3665net/ipv4/tcp.cif (oskb->next)
oskb3666net/ipv4/tcp.cskb_unlink(oskb);
oskb3668net/ipv4/tcp.ckfree_skb(oskb, FREE_WRITE); /* write. */