linux-kernel - Re: [2/2] genirq: Warn when IRQ_NOAUTOEN is used with shared interrupts

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Date:   Wed, 6 Sep 2017 16:14:50 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Paul Burton <paul.burton@...tec.com>
cc:     LKML <linux-kernel@...r.kernel.org>,
        jeffy <jeffy.chen@...k-chips.com>,
        Brian Norris <briannorris@...omium.org>,
        Marc Zyngier <marc.zyngier@....com>, dianders@...omium.org,
        tfiga@...omium.org, james.hogan@...tec.com
Subject: Re: [2/2] genirq: Warn when IRQ_NOAUTOEN is used with shared
 interrupts

On Wed, 6 Sep 2017, Paul Burton wrote:
> On Wednesday, 6 September 2017 01:16:48 PDT Thomas Gleixner wrote:
> > What's the problem with IRQ_NOAUTOEN and do
> > 
> >        setup_percpu_irq();
> >        enable_percpu_irq();
> > 
> > on the boot CPU and then later call it when the secondary CPUs come up in
> > cpu bringup code or a hotplug state callback?
> 
> There's no problem with that at all, apart from that it triggers your warning 
> when the boot CPU calls setup_percpu_irq().

Ok, I misread the whole thing somehow. What you are saying is that you need
per cpu interrupts which can be shared ....

Hrmpf, ok. I'll have a look from that side then