__comedi_check_request_region
ret = __comedi_check_request_region(dev, start, len, minstart, maxend,
EXPORT_SYMBOL_GPL(__comedi_check_request_region);
ret = __comedi_check_request_region(dev, iobase, I8255_SIZE,
int __comedi_check_request_region(struct comedi_device *dev,
return __comedi_check_request_region(dev, start, len, 0, ~0ul, 1);