MPU401_RX_EMPTY    53 sound/drivers/mpu401/mpu401_uart.c 	(!(mpu->read(mpu, MPU401C(mpu)) & MPU401_RX_EMPTY))
MPU401_RX_EMPTY    40 sound/pci/oxygen/oxygen_lib.c 	return !(oxygen_read8(chip, OXYGEN_MPU401 + 1) & MPU401_RX_EMPTY);