Re: [RFC PATCH v2 07/11] dma-mapping: Add flags to dma_map_ops to indicate PCI P2PDMA support

[Christoph Hellwig]

On Thu, Mar 11, 2021 at 04:31:37PM -0700, Logan Gunthorpe wrote:
> +int dma_pci_p2pdma_supported(struct device *dev)
> +{
> +	const struct dma_map_ops *ops = get_dma_ops(dev);
> +
> +	return !ops || ops->flags & DMA_F_PCI_P2PDMA_SUPPORTED;
> +}
> +EXPORT_SYMBOL(dma_pci_p2pdma_supported);

EXPORT_SYMBOL_GPL like all new DMA APIs.