Re: [PATCH 3/5] dma: Introduce dma_max_mapping_size()

[Christoph Hellwig]

> +static inline size_t dma_max_mapping_size(struct device *dev)
> +{
> +	const struct dma_map_ops *ops = get_dma_ops(dev);
> +	size_t size = SIZE_MAX;
> +
> +	if (dma_is_direct(ops))
> +		size = dma_direct_max_mapping_size(dev);
> +	else if (ops && ops->max_mapping_size)
> +		size = ops->max_mapping_size(dev);
> +
> +	return size;
> +}

Sorry for not noticing last time, but since 5.0 we keep all non-fast
path DMA mapping interfaces out of line, so this should move to
kernel/dma/mapping.c.

> +EXPORT_SYMBOL(dma_direct_max_mapping_size);

And then there is no need to export this one.

The dma_max_mapping_size export should be EXPORT_SYMBOL_GPL like all
new dma-mapping interfaces.