Commit a0ea59d5 authored May 13, 2013 by Libin Committed by Greg Kroah-Hartman May 21, 2013

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@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 80fe6361

drivers/char/mspec.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);