[PATCH 04/14] powerpc/vas: Setup IRQ mapping and register port for each window

[Christoph Hellwig]

> +static irqreturn_t vas_irq_handler(int virq, void *data)
> +{
> +	struct vas_instance *vinst = data;
> +
> +	pr_devel("VAS %d: virq %d\n", vinst->vas_id, virq);
> +
> +	return IRQ_HANDLED;
> +}

An empty interrupt handler is rather pointless.  It later grows code,
but adding it without that is a bad idea.  Please squash the patches
into sesible chunks.