From: Jesper Dangaard Brouer <bro...@redhat.com> Date: Wed, 13 Feb 2019 02:55:34 +0100
> As pointed out by David Miller in [1] the current page_pool implementation > stores dma_addr_t in page->private. This won't work on 32-bit platforms with > 64-bit DMA addresses since the page->private is an unsigned long and the > dma_addr_t a u64. > > Since no driver is yet using the DMA mapping capabilities of the API let's > fix this by storing the information in 'struct page' and use that to store > and retrieve DMA addresses from network drivers. > > As long as the addresses returned from dma_map_page() are aligned the first > bit, used by the compound pages code should not be set. > > Ilias tested the first two patches on Espressobin driver mvneta, for which > we have patches for using the DMA API of page_pool. > > [1]: > https://lore.kernel.org/netdev/20181207.230655.1261252486319967024.da...@davemloft.net/ > > Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com> > Signed-off-by: Ilias Apalodimas <ilias.apalodi...@linaro.org> Series applied, thanks Jesper.
