prev_aref        1411 drivers/staging/comedi/drivers/amplc_pci230.c 	unsigned int prev_aref = 0;
prev_aref        1446 drivers/staging/comedi/drivers/amplc_pci230.c 			if (aref != prev_aref) {
prev_aref        1470 drivers/staging/comedi/drivers/amplc_pci230.c 		prev_aref = aref;