dma_rx_poll_timeout 504 drivers/tty/serial/amba-pl011.c if (plat->dma_rx_poll_timeout) dma_rx_poll_timeout 506 drivers/tty/serial/amba-pl011.c plat->dma_rx_poll_timeout; dma_rx_poll_timeout 222 include/linux/amba/serial.h unsigned int dma_rx_poll_timeout;