taglinefilesource code
urginline84include/net/sock.hurginline,
urginline175net/core/sock.csk->urginline = valbool;
urginline262net/core/sock.cval = sk->urginline;
urginline648net/ipv4/af_inet.csk->urginline = 0;
urginline985net/ipv4/tcp.csk->urginline || !sk->urg_data)
urginline1933net/ipv4/tcp.cif (sk->urginline || !sk->urg_data || sk->urg_data == URG_READ)
urginline2133net/ipv4/tcp.cif (!sk->urginline)