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Date: Mon, 13 May 2013 10:17:39 +0800 From: Libin <huawei.libin@...wei.com> To: Andrew Morton <akpm@...ux-foundation.org>, Arnd Bergmann <arnd@...db.de>, Greg Kroah-Hartman <gregkh@...uxfoundation.org> CC: <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>, <guohanjun@...wei.com>, <wangyijing@...wei.com> 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 <huawei.libin@...wei.com> --- 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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