swiotlb: merge swiotlb_unmap_page and unmap_single

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 11dbcd80b4a6af8a31cab768e28ddd2a6f5cfdf4..15335f3a1bf33c2d705ee0b63cae7f37bf705a90 100644 (file)
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -765,9 +765,9 @@ dma_addr_t 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 unmap_single(struct device *hwdev, dma_addr_t dev_addr,
-                        size_t size, enum dma_data_direction dir,
-                        unsigned long attrs)
+void 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 = dma_to_phys(hwdev, dev_addr);
 
@@ -790,13 +790,6 @@ static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
        dma_mark_clean(phys_to_virt(paddr), size);
 }
 
-void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
-                       size_t size, enum dma_data_direction dir,
-                       unsigned long attrs)
-{
-       unmap_single(hwdev, dev_addr, size, dir, attrs);
-}
-
 /*
  * Make physical memory consistent for a single streaming mode DMA translation
  * after a transfer.
@@ -900,7 +893,7 @@ swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
        BUG_ON(dir == DMA_NONE);
 
        for_each_sg(sgl, sg, nelems, i)
-               unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir,
+               swiotlb_unmap_page(hwdev, sg->dma_address, sg_dma_len(sg), dir,
                             attrs);
 }