linux-ext4 - Re: powerpc allmodconfig

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Date:	Thu, 16 Oct 2008 10:43:33 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Adrian Bunk <bunk@...nel.org>
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

At Thu, 16 Oct 2008 11:21:57 +0300,
Adrian Bunk wrote:
> 
> 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.

My point is the time for removal.  The API changes should have been
done in the merge window, and it should have been tested *before* the
merge window.

> 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.

Yeah, IMHO, adding PCI IDs blindly at the late stage should be
avoided, too, although many people love that.


thanks,

Takashi
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