taglinefilesource code
lingertime115include/net/sock.hunsigned long            lingertime;
lingertime205net/core/sock.csk->lingertime=ling.l_linger;
lingertime284net/core/sock.cling.l_linger=sk->lingertime;
lingertime827net/ipv4/af_inet.cif (sk->lingertime)
lingertime828net/ipv4/af_inet.ccurrent->timeout = jiffies + HZ*sk->lingertime;