taglinefilesource code
lingertime193include/net/sock.hunsigned long          lingertime;
lingertime222net/core/sock.csk->lingertime=ling.l_linger;
lingertime305net/core/sock.cling.l_linger=sk->lingertime;
lingertime778net/ipv4/af_inet.cif (!sk->lingertime)
lingertime779net/ipv4/af_inet.ctimeout = jiffies + HZ*sk->lingertime;