From 4193079bc8cb8ebb1808e3681ccd347a6666bd76 Mon Sep 17 00:00:00 2001 From: Libin Date: Fri, 28 Jun 2013 09:51:21 +1000 Subject: [PATCH] uio: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT (*->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 Signed-off-by: Andrew Morton --- 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 b645c47501b4..3b96f18593b3 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -677,7 +677,7 @@ 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) -- 2.39.5