linux-kernel - Re: [PATCH v2] handle failure of irqchip->set_type in setup

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Date:	Wed, 9 Jul 2008 15:13:53 +0200
From:	Uwe Kleine-König <Uwe.Kleine-Koenig@...i.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH v2] handle failure of irqchip->set_type in setup_irq

Andrew Morton wrote:
> On Fri, 4 Jul 2008 20:43:07 +0200 Uwe Kleine-K__nig <Uwe.Kleine-Koenig@...i.com> wrote:
> 
> > >                                            I wonder if we can do better.
> > > Let me think about that.
> > I was about to suggest something like:
> >
> >       /* WARNING: this returns a static pointer, so you cannot use the
> >        * returned value after another call to creative_function_name
> >        */
> >       char *creative_function_name(void *addr)
> >       {
> >               static char buf[SOME_LENGTH];
> >
> >               ... format symbol name into buf ...
> >
> >               return buf;
> >       }
> >
> > Then I could have used
> >
> >       pr_err("setting flow type for irq %u failed (%s)\n",
> >                       irq, creative_function_name(chip->set_type));
> >
> > which looks definitely nicer.
> 
> Better would be
> 
>         char buf[ENOUGH /* rofl */];
> 
>         pr_err("setting flow type for irq %u failed (%s)\n",
>                         irq, render_function_name(buf, chip->set_type));
> 
> However I'm presently brewing up a plot to do this:
> 
>         printk("function name is %Ss\n", (unsigned long *)chip->set_type);
> 
> which I think will work.  We can also do
> 
>         printk("IP address is %Si\n", (unsigned long *)ip_address_buffer);
> 
> to replace NIPQUAD.  And similar printk extensions.
> 
> Am still thinking about it though.
I assume the result is 0fe1ef24f7bd0020f29ffe287dfdb9ead33ca0b2?

Should I send a new version using %pF or is it easier if you fix up the
patch?

Best regards
Uwe

-- 
Uwe Kleine-König, Software Engineer
Digi International GmbH Branch Breisach, Küferstrasse 8, 79206 Breisach, Germany
Tax: 315/5781/0242 / VAT: DE153662976 / Reg. Amtsgericht Dortmund HRB 13962
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