bktr_name|bktr_name bktr_INB|bktr_INB bktr_INL|bktr_INL bktr_INW|bktr_INW bktr_OUTB|bktr_OUTB bktr_OUTL|bktr_OUTL bktr_OUTW|bktr_OUTW bktr_close|bktr_close bktr_get_info|bktr_get_info bktr_ioctl|bktr_ioctl bktr_mmap|bktr_mmap bktr_open|bktr_open bktr_read|bktr_read bktr_set_info|bktr_set_info bktr_write|bktr_write