usb: gadget/uvc: Add support for 'get_unmapped_area' for MMUless architectures

	return ret;

}

#ifndef CONFIG_MMU

/*

 * Get unmapped area.

 *

 * NO-MMU arch need this function to make mmap() work correctly.

 */

static unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,

		unsigned long pgoff)

{

	unsigned long ret;

	mutex_lock(&queue->mutex);

	ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);

	mutex_unlock(&queue->mutex);

	return ret;

}

#endif

/*

 * Cancel the video buffers queue.

 *

	return uvc_queue_poll(&uvc->video.queue, file, wait);

}

#ifndef CONFIG_MMU

static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,

		unsigned long addr, unsigned long len, unsigned long pgoff,

		unsigned long flags)

{

	struct video_device *vdev = video_devdata(file);

	struct uvc_device *uvc = video_get_drvdata(vdev);

	return uvc_queue_get_unmapped_area(&uvc->video.queue, pgoff);

}

#endif

static struct v4l2_file_operations uvc_v4l2_fops = {

	.owner		= THIS_MODULE,

	.open		= uvc_v4l2_open,

	.ioctl		= uvc_v4l2_ioctl,

	.mmap		= uvc_v4l2_mmap,

	.poll		= uvc_v4l2_poll,

#ifndef CONFIG_MMU

	.get_unmapped_area = uvc_v4l2_get_unmapped_area,

#endif

};