linux-kernel - Re: [PATCH] pci/intr_remapping: allocate irq

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Date:	Tue, 11 Aug 2009 09:34:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>, mingo@...hat.com,
	hpa@...or.com, suresh.b.siddha@...el.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH] pci/intr_remapping: allocate irq_iommu on node -v2


* Yinghai Lu <yinghai@...nel.org> wrote:

>  static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq)
>  {
> -	return irq_2_iommu_alloc_node(irq, cpu_to_node(boot_cpu_id));
> +	int node;
> +
> +#ifdef CONFIG_SMP
> +	node = irq_to_desc(irq)->node;
> +#else
> +	node = cpu_to_node(boot_cpu_id);
> +#endif
> +
> +	return irq_2_iommu_alloc_node(irq, node);
>  }

To avoid the ifdef, shouldnt there be an new irq_node(irq) primitive 
that maps to desc->node on SMP and does the right thing on UP?

	Ingo
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