Re: [PATCH 10/11] swiotlb-xen: merge xen_unmap_single into xen_swiotlb_unmap_page

Stefano Stabellini
2019-08-29T22:49:58Z

On Mon, 26 Aug 2019, Christoph Hellwig wrote:
> No need for a no-op wrapper.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

> ---
> drivers/xen/swiotlb-xen.c | 15 ++++-----------
> 1 file changed, 4 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
> index 95911ff9c11c..384304a77020 100644
> --- a/drivers/xen/swiotlb-xen.c
> +++ b/drivers/xen/swiotlb-xen.c
> @@ -414,9 +414,8 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page,
> * After this call, reads by the cpu to the buffer are guaranteed to see
> * whatever the device wrote there.
> */
> -static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
> - size_t size, enum dma_data_direction dir,
> - unsigned long attrs)
> +static void xen_swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
> + size_t size, enum dma_data_direction dir, unsigned long attrs)
> {
> phys_addr_t paddr = xen_bus_to_phys(dev_addr);
>
> @@ -430,13 +429,6 @@ static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
> swiotlb_tbl_unmap_single(hwdev, paddr, size, dir, attrs);
> }
>
> -static void xen_swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
> - size_t size, enum dma_data_direction dir,
> - unsigned long attrs)
> -{
> - xen_unmap_single(hwdev, dev_addr, size, dir, attrs);
> -}
> -
> static void
> xen_swiotlb_sync_single_for_cpu(struct device *dev, dma_addr_t dma_addr,
> size_t size, enum dma_data_direction dir)
> @@ -477,7 +469,8 @@ xen_swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
> BUG_ON(dir == DMA_NONE);
>
> for_each_sg(sgl, sg, nelems, i)
> - xen_unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir, attrs);
> + xen_swiotlb_unmap_page(hwdev, sg->dma_address, sg_dma_len(sg),
> + dir, attrs);
>
> }
>
> --
> 2.20.1