>  	if (!dev || !profile || !governor_name) {
> @@ -568,7 +569,8 @@ struct devfreq *devfreq_add_device(struct device *dev,
>  		mutex_lock(&devfreq->lock);
>  	}
>  
> -	dev_set_name(&devfreq->dev, "%s", dev_name(dev));
> +	dev_set_name(&devfreq->dev, "devfreq%lu",
> +			(unsigned long)atomic_inc_return(&devfreq_no));

Do you have any specific reason to use "unsigned long" here?
(atomic_t has 32bit int).

>  	err = device_register(&devfreq->dev);
>  	if (err) {
>  		mutex_unlock(&devfreq->lock);
> -- 
> 1.9.1