tag	line	file	source code
ip_opt_ptr	185	include/net/sock.h	unsigned char     *ip_opt_ptr[2];    /* IP option pointers      */
ip_opt_ptr	696	net/ipv4/af_inet.c	sk->ip_opt_ptr[0]=NULL;
ip_opt_ptr	697	net/ipv4/af_inet.c	sk->ip_opt_ptr[1]=NULL;