linux-kernel - Re: powerpc allmodconfig

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Message-ID: <20081016082157.GC23630@cs181140183.pp.htv.fi>
Date:	Thu, 16 Oct 2008 11:21:57 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Williams <dan.j.williams@...el.com>,
	linux-ext4@...r.kernel.org, netdev@...r.kernel.org,
	linux-ide@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	marek.vasut@...il.com, David Woodhouse <dwmw2@...radead.org>,
	Mark Fasheh <mark.fasheh@...cle.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org
Subject: Re: powerpc allmodconfig

On Thu, Oct 16, 2008 at 09:57:11AM +0200, Takashi Iwai wrote:
> At Thu, 16 Oct 2008 10:38:36 +0300,
> Adrian Bunk wrote:
> > 
> > On Thu, Oct 16, 2008 at 07:57:29AM +0200, Takashi Iwai wrote:
> > > At Wed, 15 Oct 2008 21:33:37 -0700,
> > > Andrew Morton wrote:
> > > > 
> > > > sound/soc/soc-dapm.c:1029: warning: 'snd_soc_dapm_connect_input' is deprecated (declared at sound/soc/soc-dapm.c:1026)
> > > > sound/soc/soc-dapm.c:1029: warning: 'snd_soc_dapm_connect_input' is deprecated (declared at sound/soc/soc-dapm.c:1026)
> > > 
> > > These are definitions of deprecated interfaces.
> > > We can remove it in 2.6.29.  If we don't want to be conservative, it
> > > can be removed in 2.6.28, too.
> > >...
> > 
> > Since it's an in-kernel API there's no reason to keep it once there are 
> > no users left.
> 
> Right.  But, IMO, now is no suitable time.
> A thing like API removal should have been tested in linux-next, and we
> had plenty of time indeed for 2.6.28.
>...

A grep through the tree and one test compile that covers 
sound/soc/soc-dapm.c should be enough testing.

And having it then in -next once should be enough to discover if someone 
wrongly added a new user.

I have removed many functions in the kernel, and there isn't much that 
can go wrong - even adding a PCI ID to a driver has a bigger risk of 
introducing a regression.

> thanks,
> 
> Takashi

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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