linux-kernel - Re: [PATCH v3 2/2] gpio_wdt: Add option for early registration

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Date:	Sat, 6 Jun 2015 14:56:11 +0200
From:	Valentin Rothberg <valentinrothberg@...il.com>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Jean-Baptiste Theou <jtheou@...neo-embedded.us>,
	Wim Van Sebroeck <wim@...ana.be>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] gpio_wdt: Add option for early registration

On Sat, Jun 06, 2015 at 12:03:06PM +0200, Paul Bolle wrote:
> On Sat, 2015-06-06 at 00:46 -0700, Jean-Baptiste Theou wrote:
> > --- a/drivers/watchdog/Kconfig
> > +++ b/drivers/watchdog/Kconfig
> 
> > +config GPIO_WATCHDOG_ARCH_INITCALL
> > +	bool "Register the watchdog as early as possible"
> > +	depends on GPIO_WATCHDOG=y
> > +	help
> > +	  In some situations, the default initcall level (module_init)
> > +	  in not early enough in the boot process to avoid the watchdog
> > +	  to be triggered.
> > +	  If you say yes here, the initcall level would be raised to
> > +	  arch_initcall.
> > +	  If in doubt, say N.
> 
> > --- a/drivers/watchdog/gpio_wdt.c
> > +++ b/drivers/watchdog/gpio_wdt.c
> 
> > +#ifdef GPIO_WATCHDOG_ARCH_INITCALL
> 
> You meant
>     #ifdef CONFIG_GPIO_WATCHDOG_ARCH_INITCALL
> 
> Please use scripts/checkkconfigsymbols.py.

checkkconfigsymbols.py only checks CONFIG_ prefix symbols.  Since this
prefix is missing here, the script would not complain.  But that's
an interesting case and worth checking for.

Kind regards,
 Valentin

> 
> > +static int __init gpio_wdt_init(void)
> > +{
> > +	return platform_driver_register(&gpio_wdt_driver);
> > +}
> > +arch_initcall(gpio_wdt_init);
> > +#else
> >  module_platform_driver(gpio_wdt_driver);
> > +#endif
> 
> The entire patch is basically an elaborate NOP. How did this pass your
> testing?
> 
> 
> Paul Bolle
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