(*->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.libin@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)