Re: [PATCH v2 5/7] vsprintf: reduce code size by avoiding extracheck
From: Ingo Molnar
Date: Mon Nov 02 2009 - 15:00:54 EST
* Frederic Weisbecker <fweisbec@xxxxxxxxx> wrote:
> On Mon, Nov 02, 2009 at 08:36:23PM +0100, Ingo Molnar wrote:
> > * Frederic Weisbecker <fweisbec@xxxxxxxxx> wrote:
> > > 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.
> > Since you wrote the last iteration of that bit and you didnt find it
> André wrote this patch, not me :)
i know - i mean you touched the vsprintf code last materially.
But i see that there's been this commit since then:
8a27f7c: lib/vsprintf.c: Add "%pI6c" - print pointer as compressed ipv6 address
which introduced ip6_compressed_string().
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