linux-kernel - Re: [PATCH v2 5/7] vsprintf: reduce code size by avoiding extra check

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Message-ID: <20091102193248.GC4880@nowhere>
Date:	Mon, 2 Nov 2009 20:32:50 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	André Goddard Rosa <andre.goddard@...il.com>,
	laijs@...fujitsu.com, mingo@...e.hu, davem@...emloft.net,
	akpm@...ux-foundation.org, harvey.harrison@...il.com,
	linux list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/7] vsprintf: reduce code size by avoiding extra
	check

On Mon, Nov 02, 2009 at 10:29:43AM -0800, Joe Perches wrote:
> On Mon, 2009-11-02 at 19:19 +0100, Frederic Weisbecker wrote:
> > On Mon, Nov 02, 2009 at 03:26:36PM -0200, André Goddard Rosa wrote:
> > > Subject: [PATCH v2 5/7] vsprintf: reduce code size by avoiding extra check
> > >    text    data     bss     dec     hex filename
> > >   15735       0       8   15743    3d7f lib/vsprintf.o-before
> > >   15719       0       8   15727    3d6f lib/vsprintf.o-minus-double-check
> > Please add a changelog in your patches, I mean something that
> > explain your practical change.
> 
> Read the subject and try not to go overboard.
> I think the changelog André provided is perfect.


It took me some time yesterday to understand how ip6_compressed_string()
does its job, hence it took me some time to ensure this patch is safe,
hence this reaction for something that didn't seem obvious to me at
a first glance.

But you're right actually, the problem was more in my homework than in
the changelog.

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