From: sayli karnik <karniksayli1995@gmail.com>
Date: Mon, 19 Sep 2016 21:51:38 +0000 (+0530)
Subject: staging: comedi: Use vma_pages function on vma object instead of explicit computation
X-Git-Tag: v4.9-rc1~119^2~291
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ec9d0754e0c64013278fda87d1bd6b8318747abe;p=karo-tx-linux.git

staging: comedi: Use vma_pages function on vma object instead of explicit computation

This patch uses vma_pages function on vma object instead of explicit
computation.

Signed-off-by: sayli karnik <karniksayli1995@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index bf922eafe07c..64b3966c5f1f 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -2233,7 +2233,7 @@ static int comedi_mmap(struct file *file, struct vm_area_struct *vma)
 		goto done;
 	}
 
-	n_pages = size >> PAGE_SHIFT;
+	n_pages = vma_pages(vma);
 
 	/* get reference to current buf map (if any) */
 	bm = comedi_buf_map_from_subdev_get(s);