tag	line	file	source code
ISDN_USAGE_NONE	1560	drivers/isdn/isdn_common.c	dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
ISDN_USAGE_NONE	206	include/linux/isdn.h	#define USG_NONE(x)     ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)