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

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  Re: [PATCH v3 2/2] gpio_wdt: Add option for early registration Valentin Rothberg <valentinrothberg@gmail.com> - 2015-06-06 15:00 +0200
    Re: [PATCH v3 2/2] gpio_wdt: Add option for early registration Paul Bolle <pebolle@tiscali.nl> - 2015-06-06 16:20 +0200

#1159889 — 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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#1159912

On Sat, 2015-06-06 at 14:56 +0200, Valentin Rothberg wrote:
> 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:
> > > +#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.

Of course. Thanks for correcting me.

> But that's an interesting case and worth checking for.

Perhaps. Depends on the amount of false positives that such checks would
trigger, I'd say.


Paul Bolle

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