> +bool dma_addressing_limited(struct device *dev)> +{> + return min_not_zero(dma_get_mask(dev), dev->bus_dma_limit) <> + dma_get_required_mask(dev);> +}> +EXPORT_SYMBOL(dma_addressing_limited);I've changed this to an EXPORT_SYMBOL_GPL to match dma_get_required_mask.