On 2/12/19 6:49 AM, Jesper Dangaard Brouer wrote:
> The page_pool API is using page->private to store DMA addresses.
> As pointed out by David Miller we can't use that on 32-bit architectures
> with 64-bit DMA
>
> This patch adds a new dma_addr_t struct to allow storing DMA addresses
>
> Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com>
> Signed-off-by: Ilias Apalodimas <ilias.apalodi...@linaro.org>
> Acked-by: Andrew Morton <a...@linux-foundation.org>
> ---
> include/linux/mm_types.h | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> index 2c471a2c43fa..581737bd0878 100644
> --- a/include/linux/mm_types.h
> +++ b/include/linux/mm_types.h
> @@ -95,6 +95,13 @@ struct page {
> */
> unsigned long private;
> };
> + struct { /* page_pool used by netstack */
> + /**
> + * @dma_addr: page_pool requires a 64-bit value even on
> + * 32-bit architectures.
> + */
Nit: might require? dma_addr_t, as you mention in the commit may have a
different size based on CONFIG_ARCH_DMA_ADDR_T_64BIT.
--
Florian
