linux-kernel - Re: [3/3] IRQ: Print "unexpected IRQ" messages consistently across architectures

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Message-Id: <20150713032303.D49801402B1@ozlabs.org>
Date:	Mon, 13 Jul 2015 13:23:03 +1000 (AEST)
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-arch@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-am33-list@...hat.com, linux-ia64@...r.kernel.org,
	linux-c6x-dev@...ux-c6x.org, linux-parisc@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
	adi-buildroot-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
	linux-alpha@...r.kernel.org, x86@...nel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [3/3] IRQ: Print "unexpected IRQ" messages consistently across architectures

On Sun, 2015-12-07 at 22:02:11 UTC, Bjorn Helgaas wrote:
> Many architectures use a variant of "unexpected IRQ trap at vector %x" to
> log unexpected IRQs.  This is confusing because (a) it prints the Linux IRQ
> number, but "vector" more often refers to a CPU vector number, and (b) it
> prints the IRQ number in hex with no base indication, while Linux IRQ
> numbers are usually printed in decimal.
> 
> Print the same text ("unexpected IRQ %d") across all architectures.
> 
> No functional change other than the output text.

There's already a fallback version in asm-generic, so shouldn't you instead
just delete all the versions that are identical to that?

eg. on powerpc we have:

>  static inline void ack_bad_irq(unsigned int irq)
>  {
> -	printk(KERN_CRIT "unexpected IRQ trap at vector %02x\n", irq);
> +	printk(KERN_CRIT "unexpected IRQ %d\n", irq);
>  }

And the generic version is:

>  #ifndef ack_bad_irq
>  static inline void ack_bad_irq(unsigned int irq)
>  {
> -	printk(KERN_CRIT "unexpected IRQ trap at vector %02x\n", irq);
> +	printk(KERN_CRIT "unexpected IRQ %d\n", irq);
>  }
>  #endif

So we can just delete the powerpc version?

cheers
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