226 static u16 x_old[MAX_CONTACTS + 1] = {0};  variable
649 		x_old[id] = x;  in filter_point()
652 	x_err = x > x_old[id] ? (x - x_old[id]) : (x_old[id] - x);  in filter_point()
674 	x_new = x > x_old[id] ? (x_old[id] + filter_step_x)  in filter_point()
675 				: (x_old[id] - filter_step_x);  in filter_point()
678 	x_old[id] = x_new;  in filter_point()
690 		x_old[id] = x;  in record_point()
693 	x = (x_old[id] + x) / 2;  in record_point()
695 	if (x > x_old[id])  in record_point()
696 		x_err = x - x_old[id];  in record_point()
698 		x_err = x_old[id] - x;  in record_point()
705 		x_old[id] = x;  in record_point()
711 			x_old[id] = x;  in record_point()
713 			x_new = x_old[id];  in record_point()
723 		x_new = x_old[id];  in record_point()