[PATCH v1 00/17] Provide a new two step DMA mapping API

[Christoph Hellwig]

On Fri, Nov 08, 2024 at 11:38:46AM -0400, Jason Gunthorpe wrote:
> > > What I'm thinking about is replacing code like the above with something like:
> > > 
> > > 		if (p2p_provider)
> > > 			return DMA_MAPPING_ERROR;
> > > 
> > > And the caller is the one that would have done is_pci_p2pdma_page()
> > > and either passes p2p_provider=NULL or page->pgmap->p2p_provider.
> > 
> > And where do you get that one from?
> 
> Which one?

The p2p_provider thing (whatever that will actually be).