linux-kernel - Re: [PATCH] powerpc: Update all configs using savedefconfig

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Message-ID: <1424736683.2318.0.camel@ellerman.id.au>
Date:	Tue, 24 Feb 2015 11:11:23 +1100
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Linuxppc-dev <linuxppc-dev@...abs.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] powerpc: Update all configs using savedefconfig

On Mon, 2015-02-23 at 10:59 +0100, Geert Uytterhoeven wrote:
> Hi Michael,
> 
> On Tue, Jan 20, 2015 at 8:05 AM, Michael Ellerman <mpe@...erman.id.au> wrote:
> > It looks like it's ~4 years since we updated some of these, so do a bulk
> > update.
> >
> > Verified that the before and after generated configs are exactly the
> > same.
> 
> Yep, that's guaranteed by the tool (modulo bugs).
> 
> > Which begs the question why update them? The answer is that it can be
> > confusing when the stored defconfig drifts too far from the generated
> > result.
> 
> And it becomes hard to update them, e.g. for enabling or disabling a single
> option.
> 
> Now the big question is: do they still work?
> Plainly ignoring any bugs introduced in the code, there are probably several
> "select" statements that have been removed. 4 years ago, they automatically
> selected some critical options, while now, they're no longer selected, causing
> breakage.

Yeah true. So far no one has yelled at me, so perhaps we got lucky :)

cheers


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