static void vm_close(struct vm_area_struct *vma)
{
	struct v4l2l_buffer *buf;
	MARK();

	buf = vma->vm_private_data;
	buf->use_count--;
}
static void vm_close(struct vm_area_struct *vma)
{
	struct v4l2l_buffer *buf;
	MARK();

	buf = vma->vm_private_data;
	buf->use_count--;
}