if (inet_rsk(req)->opt) kfree(inet_rsk(req)->opt); 
kfree(inet_rsk(req)->opt); 
static void tcp_v4_reqsk_destructor(struct request_sock *req){	if (inet_rsk(req)->opt)		kfree(inet_rsk(req)->opt);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/a51482bde22f99c63fbbb57d5d46cc666384e379/tcp_ipv4.c/clean/net/ipv4/tcp_ipv4.c