linux-kernel - Re: ARM defconfig files

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Message-ID: <1275589230.23384.19.camel@c-dwalke-linux.qualcomm.com>
Date:	Thu, 03 Jun 2010 11:20:30 -0700
From:	Daniel Walker <dwalker@...eaurora.org>
To:	Russell King <rmk@....linux.org.uk>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-arm-msm@...r.kernel.org
Subject: Re: ARM defconfig files

On Thu, 2010-06-03 at 19:10 +0100, Russell King wrote:

> config STD_CONFIG
> 	bool "Enable me to generate a standard configuration for your platform"
> 
> and then have platforms conditionally select everything that's
> appropriate for their use.  That provides a way to avoid the ages old
> issue of select forcing options on, but the user still being presented
> with the option and being told the only possible value for it is 'y'.
> 
> And yes, it _is_ necessary - because if you want to turn off something
> on the platform - eg, you're not using MMC and MMC fails to build -
> you can still end up with a working configuration at the end of the
> day.

Check out the SAT solver link I quoted in the prior email.. That sounds
like a really interesting solution. The defconfigs would ultimately hold
just what's unique to a given board, then the solver would figure out
what to else to enable just from those unique properties.

So we would still have defconfigs , but they would not have loads of
duplication like they do now.

I don't see how we can do without defconfigs altogether tho. I mean , if
you want to run a Beagle board or a Nexus one we can't just give the
users a slim ARM config and let them troll through 1000's of drivers
trying to find just those ones that work on their given board.

Daniel

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