linux-kernel - Re: [PATCH v2] gpiolib: Allow user-selection

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Date:	Sun, 6 Jul 2008 23:13:46 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Michael Buesch <mb@...sch.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-kernel@...r.kernel.org, David Brownell <david-b@...bell.net>
Subject: Re: [PATCH v2] gpiolib: Allow user-selection

On Sun, Jul 06, 2008 at 10:01:24PM +0200, Michael Buesch wrote:
> On Sunday 06 July 2008 21:52:12 Adrian Bunk wrote:
>...
> So well. I'm not sure what you're talking about. Care to make
> a better helptext?

Sorry, the problem wasn't the help text but me being blind.

Please ignore my comment.

> > > --- linux-next.orig/arch/arm/configs/am200epdkit_defconfig	2008-07-03 11:31:05.000000000 +0200
> > > +++ linux-next/arch/arm/configs/am200epdkit_defconfig	2008-07-03 11:36:14.000000000 +0200
> > > @@ -668,7 +668,7 @@
> > >  #
> > >  # CONFIG_SPI is not set
> > >  # CONFIG_SPI_MASTER is not set
> > > -CONFIG_HAVE_GPIO_LIB=y
> > > +CONFIG_ARCH_REQUIRE_GPIOLIB=y
> > >...
> > 
> > Please don't do this kind of defconfig updates - it doesn't bring any
> > advantage but can create tons of patch conflicts.
> > 
> > The next time a defconfig gets updated it will anyway automatically be
> > fixed, and for defconfigs that aren't updated it doesn't create any
> > problems to keep them as they are today until they might one day get
> > updated.
> 
> So will the auto-regenerated defconfig result in CONFIG_ARCH_REQUIRE_GPIOLIB=y
> or CONFIG_ARCH_REQUIRE_GPIOLIB=n? I thought it would result in =n, as the
> option defaults to n. So I changed all defconfigs.
> 
> (I think these (sub)archs should "select" the option in their Kconfig, but I
> didn't want to go down that way).

A defconfig is just a normal .config and cannot override any dependencies.

CONFIG_ARCH_REQUIRE_GPIOLIB is not user visible and defaults to n, so if 
no option select's it then even using a defconfig that has it enabled 
will result in a .config that has it disabled.

> Greetings Michael.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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