linux-kernel - optimized script [Was: ARM defconfig files]

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Message-ID: <20100713080705.GA20978@pengutronix.de>
Date:	Tue, 13 Jul 2010 10:07:05 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Nicolas Pitre <nico@...xnic.net>,
	Daniel Walker <dwalker@...eaurora.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Kevin Hilman <khilman@...prootsystems.com>,
	linux-arm-msm@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-omap@...r.kernel.org, Eric Miao <eric.miao@...onical.com>,
	linux-arm-kernel@...ts.infradead.org,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Olof Johansson <olof@...om.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: optimized script [Was: ARM defconfig files]

Hello,

On Tue, Jul 13, 2010 at 09:07:41AM +0200, Uwe Kleine-König wrote:
> Hi
> 
> On Mon, Jul 12, 2010 at 01:50:47PM -0600, Grant Likely wrote:
> > On Mon, Jul 12, 2010 at 1:34 PM, Linus Torvalds
> > <torvalds@...ux-foundation.org> wrote:
> > > On Mon, Jul 12, 2010 at 12:17 PM, Nicolas Pitre <nico@...xnic.net> wrote:
> > >> I think Uwe could provide his script and add it to the kernel tree.
> > >> Then all architectures could benefit from it.  Having the defconfig
> > >> files contain only those options which are different from the defaults
> > >> is certainly more readable, even on x86.
> > >
> > > Quite possible. But maintainers would need to be on the lookout of
> > > people actually using the script, and refusing to apply patches that
> > > re-introduce the whole big thing.
> > 
> > I can (partially) speak for powerpc.  If ARM uses this approach, then
> > I think we can do the same.  After the defconfigs are trimmed, I
> > certainly won't pick up any more full defconfigs.
> I just restarted my script on the powerpc defconfigs basing on rc5, I
> assume they complete in a few days time.
So Stephen was faster than me.  I don't know yet how he optimised my
script, meanwhile I put some efforts into it, too by just checking lines
that match "^(# )?CONFIG_".

Find it attached.

I will start to reduce the remaining configs (i.e. all but arm and
powerpc).

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

View attachment "reduce_defconfig" of type "text/plain" (1900 bytes)