snd_uart16550_io_loop 307 sound/drivers/serial-u16550.c snd_uart16550_io_loop(uart); snd_uart16550_io_loop 321 sound/drivers/serial-u16550.c snd_uart16550_io_loop(uart); snd_uart16550_io_loop 664 sound/drivers/serial-u16550.c snd_uart16550_io_loop(uart);