linux-kernel - Re: [PATCH] ucb1400_ts depends SND_AC97

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Message-id: <alpine.LFD.1.10.0809051049460.23787@xanadu.home>
Date:	Fri, 05 Sep 2008 10:52:25 -0400 (EDT)
From:	Nicolas Pitre <nico@....org>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	Dmitry Torokhov <dtor@...ightbb.com>,
	lkml <linux-kernel@...r.kernel.org>, akpm <akpm@...l.org>,
	linux-next@...r.kernel.org
Subject: Re: [PATCH] ucb1400_ts depends SND_AC97_BUS

On Fri, 5 Sep 2008, Takashi Iwai wrote:

> At Fri, 05 Sep 2008 01:09:48 -0400 (EDT),
> Nicolas Pitre wrote:
> > 
> > On Thu, 4 Sep 2008, Randy Dunlap wrote:
> > 
> > > On Fri, 05 Sep 2008 00:37:17 -0400 (EDT) Nicolas Pitre wrote:
> > > 
> > > > On Thu, 4 Sep 2008, Randy Dunlap wrote:
> > > > 
> > > > > On Sun, 10 Dec 2006 22:55:25 -0500 (EST) Nicolas Pitre wrote:
> > > > > 
> > > > > > On Sat, 9 Dec 2006, Randy Dunlap wrote:
> > > > > > 
> > > > > > > On Sat, 09 Dec 2006 22:17:55 -0500 (EST) Nicolas Pitre wrote:
> > > > > > > 
> > > > > > > > Please consider what SND_CONFIG_AC97_BUS corresponds to.  It is 
> > > > > > > > sound/pci/ac97/ac97_bus.c and if you look into this file you'll see that 
> > > > > > > > it is perfectly buildable even if sound is entirely configured out, just 
> > > > > > > > like some lib code would be.
> > > > > > > 
> > > > > > > OK.  Should it (CONFIG_SND_AC97_BUS -> sound/pci/ac97/ac97_bus.c)
> > > > > > > be buildable when sound is disabled?
> > > > > > 
> > > > > > Yes.
> > > > > > 
> > > > > > > If so, where should it be moved to (since afaik, make won't even
> > > > > > > descend into sound/ if SOUND=n; I don't see that changing
> > > > > > > any time soon).
> > > > > > 
> > > > > > What about this patch?
> > > > > 
> > > > > Can we get this patch or some patch into the input tree for linux-next?
> > > > 
> > > > This patch is commit e1036502e5263851259d147771226161e5ccc85a and 
> > > > appeared in mainline almost 2 years ago.
> > > 
> > > Ack.  Sorry about that.  Wrong ucb thread.
> > > 
> > > ucb1400_core still has build errors in linux-next
> > > since it uses ac97_bus_type even when CONFIG_SOUND=n.
> > 
> > Both sound (AC97) and UCB1400 should be able to select CONFIG_AC97_BUS 
> > independently from each other.
> > 
> > And in linux/sound/Makefile one can find this note:
> > 
> > 	# This one must be compilable even if sound is configured out
> > 	obj-$(CONFIG_AC97_BUS) += ac97_bus.o
> > 
> > This was fixed 2 years ago.  Who broke it this time?
> 
> Oh, it must be me.

I think both your patch and the one I previously posted are needed.


Nicolas
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