tcp_twsk_destructor  310 include/net/tcp.h extern void			tcp_twsk_destructor(struct sock *sk);
tcp_twsk_destructor 1173 net/ipv4/tcp_ipv4.c 	.twsk_destructor= tcp_twsk_destructor,
tcp_twsk_destructor  906 net/ipv6/tcp_ipv6.c 	.twsk_destructor= tcp_twsk_destructor,