(*->vm_end - *->vm_start) >> PAGE_SHIFT operation is implemented
as a inline funcion vma_pages() in linux/mm.h, so using it.
Signed-off-by: Libin <huawei.li...@huawei.com>
---
drivers/uio/uio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index c8b9262..ba5447f 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -676,7 +676,7 @@ static int uio_mmap(struct file *filep, struct
vm_area_struct *vma)
if (mi < 0)
return -EINVAL;
- requested_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+ requested_pages = vma_pages(vma);
actual_pages = ((idev->info->mem[mi].addr & ~PAGE_MASK)
+ idev->info->mem[mi].size + PAGE_SIZE -1) >>
PAGE_SHIFT;
if (requested_pages > actual_pages)
--
1.8.2.1
--
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