usb_serial_console_exit  267 drivers/usb/serial/console.c 		usb_serial_console_exit();
usb_serial_console_exit 1267 drivers/usb/serial/usb-serial.c 	usb_serial_console_exit();
usb_serial_console_exit  330 include/linux/usb/serial.h extern void usb_serial_console_exit(void);