linux-kernel - Re: [PATCH 01/23] kernel: irq: irqdescs: warn on spurious IRQ

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Message-ID: <87ft3zyaqa.fsf@mpe.ellerman.id.au>
Date:   Mon, 21 Dec 2020 16:44:13 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Andy Shevchenko <andy.shevchenko@...il.com>,
        "Enrico Weigelt\, metux IT consult" <info@...ux.net>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
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Subject: Re: [PATCH 01/23] kernel: irq: irqdescs: warn on spurious IRQ

Andy Shevchenko <andy.shevchenko@...il.com> writes:
> On Fri, Dec 18, 2020 at 4:37 PM Enrico Weigelt, metux IT consult
> <info@...ux.net> wrote:
>
>> +               if (printk_ratelimit())
>> +                       pr_warn("spurious IRQ: irq=%d hwirq=%d nr_irqs=%d\n",
>> +                               irq, hwirq, nr_irqs);
>
> Perhaps you missed pr_warn_ratelimit() macro which is already in the
> kernel for a long time.

pr_warn_ratelimited() which calls printk_ratelimited().

And see the comment above printk_ratelimit():

/*
 * Please don't use printk_ratelimit(), because it shares ratelimiting state
 * with all other unrelated printk_ratelimit() callsites.  Instead use
 * printk_ratelimited() or plain old __ratelimit().
 */


cheers