cdev_bpftun_init  229 arch/i386/i386/conf.c 	cdev_bpftun_init(NBPFILTER,bpf),/* 23: Berkeley packet filter */
cdev_bpftun_init  250 arch/i386/i386/conf.c 	cdev_bpftun_init(NTUN,tun),	/* 40: network tunnel */