From a0ea59d56dfab021ecc65365275e532c6b937adb Mon Sep 17 00:00:00 2001 From: Libin Date: Mon, 13 May 2013 10:17:39 +0800 Subject: [PATCH] char: 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: Greg Kroah-Hartman --- drivers/char/mspec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c index e1f60f968fdd..f1d7fa45c275 100644 --- a/drivers/char/mspec.c +++ b/drivers/char/mspec.c @@ -267,7 +267,7 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma, if ((vma->vm_flags & VM_WRITE) == 0) return -EPERM; - pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; + pages = vma_pages(vma); vdata_size = sizeof(struct vma_data) + pages * sizeof(long); if (vdata_size <= PAGE_SIZE) vdata = kzalloc(vdata_size, GFP_KERNEL);