From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx158.postini.com [74.125.245.158]) by kanga.kvack.org (Postfix) with SMTP id DA9616B0002 for ; Sun, 12 May 2013 22:19:58 -0400 (EDT) From: Libin Subject: [PATCH] char: Use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT Date: Mon, 13 May 2013 10:17:39 +0800 Message-ID: <1368411459-52524-1-git-send-email-huawei.libin@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Arnd Bergmann , Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, guohanjun@huawei.com, wangyijing@huawei.com (*->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 --- 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 e1f60f9..f1d7fa4 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); -- 1.8.2.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org