linux-kernel - Re: [PATCH RESEND] genirq: Machine-parsable version of /proc/interrupts

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Message-ID: <alpine.DEB.2.20.1609090814260.10562@nanos>
Date:   Fri, 9 Sep 2016 08:15:55 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Craig Gallek <kraigatgoog@...il.com>
cc:     David Decotigny <decot@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RESEND] genirq: Machine-parsable version of
 /proc/interrupts

On Tue, 6 Sep 2016, Craig Gallek wrote:

> On Fri, Sep 2, 2016 at 10:59 AM, Thomas Gleixner <tglx@...utronix.de> wrote:
> > On Tue, 26 Jul 2016, Craig Gallek wrote:
> >> +static void irq_kobj_release(struct kobject *kobj)
> >> +{
> >> +     struct irq_desc *desc = container_of(kobj, struct irq_desc, kobj);
> >> +
> >> +     /*
> >> +      * This irq_desc is statically allocated.  Simply zero its kobject
> >> +      * rather than kfree it.
> >> +      */
> >> +     memset(&desc->kobj, 0, sizeof(desc->kobj));
> >
> > This will nicely explode when the irq descriptor is handed out again before
> > this function is called.
> >
> > There is no point to make this work for !SPARSE_IRQ. Just ignore it.
> Thank you for the review.  Just one clarification before I send v2:
> Are you suggesting getting rid of this feature entirely for the
> non-sparse version or just this kobject cleanup code?

There is no point in supporting that !SPARSE stuff. It should die anyway.

Thanks,

	tglx