taglinefilesource code
urginline576net/inet/af_inet.csk->urginline = 0;
urginline188net/inet/sock.csk->urginline = 1;
urginline190net/inet/sock.csk->urginline = 0;
urginline283net/inet/sock.cval = sk->urginline;
urginline74net/inet/sock.hurginline,
urginline365net/inet/tcp.cif (amount && !sk->urginline && sk->urg_data &&
urginline1360net/inet/tcp.cif (sk->urginline || !sk->urg_data || sk->urg_data == URG_READ)
urginline1528net/inet/tcp.cif (!sk->urginline)