taglinefilesource code
send_tail1865net/inet/ip.csk->send_tail = skb;
send_tail1870net/inet/ip.csk->send_tail->link3 = skb;
send_tail1871net/inet/ip.csk->send_tail = skb;
send_tail852net/inet/sock.csk->send_tail = NULL;
send_tail93net/inet/sock.hstruct sk_buff    * volatile send_tail;
send_tail1870net/inet/tcp.cnewsk->send_tail = NULL;
send_tail2261net/inet/tcp.csk->send_tail = skb;
send_tail2269net/inet/tcp.cif (skb->link3 == NULL) sk->send_tail = skb;
send_tail2337net/inet/tcp.csk->send_tail = NULL;
send_tail2362net/inet/tcp.csk->send_tail = skb;
send_tail2364net/inet/tcp.csk->send_tail->link3 = skb;
send_tail2365net/inet/tcp.csk->send_tail = skb;
send_tail2373net/inet/tcp.cif (sk->send_tail == NULL || sk->send_head == NULL) {
send_tail2375net/inet/tcp.csk->send_tail = NULL;
send_tail2519net/inet/tcp.csk->send_tail = NULL;