tag	line	file	source code
PPP_IP	310	drivers/net/ppp.c	{ PPP_IP,         rcv_proto_ip         },
PPP_IP	1326	drivers/net/ppp.c	return rcv_proto_ip (ppp, PPP_IP, data, new_count);
PPP_IP	1345	drivers/net/ppp.c	return rcv_proto_ip (ppp, PPP_IP, data, count);
PPP_IP	2892	drivers/net/ppp.c	int      proto = PPP_IP;