linux-kernel - Re: [PATCH 29/37] sparseirq: change irq_desc

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Message-ID: <alpine.DEB.2.00.1001191201000.22304@router.home>
Date:	Tue, 19 Jan 2010 12:01:38 -0600 (CST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Yinghai Lu <yinghai@...nel.org>
cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 29/37] sparseirq: change irq_desc_ptrs to static

On Fri, 15 Jan 2010, Yinghai Lu wrote:

> +void replace_irq_desc(unsigned int irq, struct irq_desc *desc)
> +{
> +	if (irq_desc_ptrs && irq < nr_irqs)
> +		irq_desc_ptrs[irq] = desc;
> +}

Why is it now ok to specify an out of range irq number?

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