usb_wwan_write_room - Linux

Symbol: usb_wwan_write_room

drivers/usb/serial/option.c

.write_room = usb_wwan_write_room,

drivers/usb/serial/qcserial.c

.write_room = usb_wwan_write_room,

drivers/usb/serial/usb-wwan.h

extern unsigned int usb_wwan_write_room(struct tty_struct *tty);

drivers/usb/serial/usb_wwan.c

EXPORT_SYMBOL(usb_wwan_write_room);