arm64: dma-mapping: Cocci spatch "vma_pages"

Use vma_pages function on vma object instead of explicit computation. Found by coccinelle spatch "api/vma_pages.cocci" Reviewed-by: Robin Murphy <[email protected]> Signed-off-by: Thomas Meyer <[email protected]> Signed-off-by: Will Deacon <[email protected]>
tomthink · Oct 2, 2017 · b4f4a27 · b4f4a27
1 parent c2f0b54
commit b4f4a27
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
@@ -303,8 +303,7 @@ static int __swiotlb_mmap_pfn(struct vm_area_struct *vma,
 			      unsigned long pfn, size_t size)
 {
 	int ret = -ENXIO;
-	unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >>
-					PAGE_SHIFT;
+	unsigned long nr_vma_pages = vma_pages(vma);
 	unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
 	unsigned long off = vma->vm_pgoff;