linux-kernel - Re: [PATCH] Remove remaining references of CONFIG_GENERIC

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Message-ID: <CACqU3MU_oq+RYydenKG_8U08rdJ-N+2hftH+2xEPZU0uVP6i5A@mail.gmail.com>
Date:	Mon, 1 Aug 2011 13:20:26 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Nicolas Pitre <nico@...xnic.net>
Cc:	Kyle Moffett <kyle@...fetthome.net>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Zoltan Devai <zdevai@...il.com>,
	lkml <linux-kernel@...r.kernel.org>, chris@...kel.net,
	linux-am33-list@...hat.com, trivial@...nel.org,
	user-mode-linux-devel@...ts.sourceforge.net, cmetcalf@...era.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kbuild <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH] Remove remaining references of CONFIG_GENERIC_TIME

Hi,

On Mon, Aug 1, 2011 at 12:40 PM, Nicolas Pitre <nico@...xnic.net> wrote:
> On Mon, 1 Aug 2011, Arnaud Lacombe wrote:
>
>> Moreover, this approach is deemed to fail. The current symbol
>> namespace is tied to an arch, so whenever you do:
>>
>> arch/arm/Kconfig:
>> config FOO
>>     bool
>>
>> config BAZ
>>     bool
>>
>> drivers/cpufreq/Kconfig
>> config BAR
>>     depends on ARM && FOO
>>     select BAZ
>>
>> You will end up triggering the warning for every ARCH != ARM...
>
> You can keep a state for those symbols with regard to their level of
> reference.  Surely if ARM isn't true, BAZ is not "actively" referenced
> in the end.
>
he :) we enter in compilers optimizations. As much as I agree with
you, that might not be trivial to implement given the internal,
ad-hoc, structure of kconfig. All of that would be useless if we had a
single global namespace.

 - Arnaud
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