linux-kernel - RE: [Questions]: how to extend nr

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Message-ID: <alpine.DEB.2.11.1601110948200.3575@nanos>
Date:	Mon, 11 Jan 2016 09:50:55 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Zhou Qiao(周侨) <qiaozhou@...micro.com>
cc:	jason@...edaemon.net, linux-kernel@...r.kernel.org
Subject: RE: [Questions]: how to extend nr_irqs for arch arm64

On Mon, 11 Jan 2016, Zhou Qiao(周侨) wrote:
> I met an issue here. The nr_irqs is extended when the start_irq + cnt >
> nr_irqs. So when nr_irqs is not extended(still 64), a device with a large
> hr_irq(70) will get a wrong virq. since it will be mod by nr_irqs before

No, it won't get a wrong virq. It will get a virq and it does not matter at
all whether the hardware irq number is 10, 70, 500 or 5000. What's your
problem?

Thanks,

	tglx