On Fri, Jun 05, 2015 at 05:19:55PM -0400, Dan Williams wrote: > As long as a dma_map_sg() implementation avoids sg_page() conversions it > can support scatterlists that carry "page-less" __pfn_t entries. > However, a couple implementations require that __pfn_t_has_page() is > always true. The Xen swiotlb implementation's entanglements with ARM and > the Calgary MMUs requirement to have a pre-existing virtual mapping make > them unable to support this conversion (i.e. these now have 'depends on > !HAVE_DMA_PFN'). That's why we really need a whole kernel conversion and not just a piecemail one. Given how trivial this patch is that doesn't look like a too big task ayway. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
