linux-kernel - Re: ARM defconfig files

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Message-ID: <20100603194559.GF25779@flint.arm.linux.org.uk>
Date:	Thu, 3 Jun 2010 20:45:59 +0100
From:	Russell King <rmk@....linux.org.uk>
To:	Daniel Walker <dwalker@...eaurora.org>
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, Jun 03, 2010 at 12:35:42PM -0700, Daniel Walker wrote:
> On Thu, 2010-06-03 at 11:56 -0700, Linus Torvalds wrote:
> > 
> > On Thu, 3 Jun 2010, Russell King wrote:
> > > 
> > > No amount of reorganising the Kconfig files into a heirarchial manner
> > > (which they already are) helps.  Not one bit.  Because they already are.
> > > That's not where the problem is.
> > 
> > I don't think you read the whole thread.
> > 
> > Earlier on, I explained exactly what I wanted: just add some "select" 
> > statements to pickt he things you need per the particular target 
> > configuration. You seem to have missed that part.
> > 
> > In other words, you _can_ encode the information that is in the 
> > xyz_defconfig files by doing it in Kconfig.xyz files instead. But you do 
> > it in a human-readable manner. And the hierarchical thing is absolutely 
> > required for that - otherwise you'd end up with just another form of the 
> > current xyz_defconfig.
> > 
> > See?
> > 
> > In other words, you should be able to basically use "make allnoconfig" 
> > together with a Kconfig.xyz file input to select _exactly_ the pieces you 
> > need, and nothing else.
> 
> If you did this for drivers, what about disabling a driver? If we used
> "select" wouldn't that force all the drivers on without allowing it to
> be unselected?

I already covered that in my (ignored) email where I brought up a
"STD_CONFIG" config symbol, which could be disabled to turn off all
these additional "select"s.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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