linux-kernel - Re: Build regressions/improvements in v3.0-rc7 (sound/isa/)

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Date:	Thu, 28 Jul 2011 13:06:19 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Randy Dunlap <rdunlap@...otime.net>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Takashi Iwai <tiwai@...e.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	Michal Marek <mmarek@...e.cz>, linux-kbuild@...r.kernel.org
Subject: Re: Build regressions/improvements in v3.0-rc7 (sound/isa/)

Hi,

On Thu, Jul 28, 2011 at 12:44 PM, Randy Dunlap <rdunlap@...otime.net> wrote:
> On Thu, 28 Jul 2011 12:36:27 -0400 Arnaud Lacombe wrote:
>
>> Hi,
>>
>> On Thu, Jul 28, 2011 at 12:21 PM, Randy Dunlap <rdunlap@...otime.net> wrote:
>> > On Thu, 28 Jul 2011 11:17:09 +1000 Stephen Rothwell wrote:
>> >
>> >> Hi Randy,
>> >>
>> >> On Wed, 27 Jul 2011 12:13:20 -0700 Randy Dunlap <rdunlap@...otime.net> wrote:
>> >> >
>> >> > On Mon, 25 Jul 2011 09:10:03 -0700 Randy Dunlap wrote:
>> >> >
>> >> > > On Mon, 25 Jul 2011 09:37:53 +0200 Takashi Iwai wrote:
>> >> > >
>> >> > > > At Sun, 24 Jul 2011 12:26:24 -0700,
>> >> > > > Randy Dunlap wrote:
>> >> > > > >
>> >> > > > > On Wed, 13 Jul 2011 21:33:30 +0200 Geert Uytterhoeven wrote:
>> >> > > > >
>> >> > > > > >   + src/sound/isa/ad1816a/ad1816a_lib.c: error: implicit declaration of function 'snd_dma_disable':  => 544
>> >> > > > > >   + src/sound/isa/ad1816a/ad1816a_lib.c: error: implicit declaration of function 'snd_dma_pointer':  => 302
>> >> > > > > >   + src/sound/isa/ad1816a/ad1816a_lib.c: error: implicit declaration of function 'snd_dma_program':  => 244
>> >> > > > > >   + src/sound/isa/es1688/es1688_lib.c: error: implicit declaration of function 'snd_dma_pointer':  => 509
>> >> > > > > >   + src/sound/isa/es1688/es1688_lib.c: error: implicit declaration of function 'snd_dma_program':  => 417
>> >> > > > > >   + src/sound/isa/gus/gus_dma.c: error: implicit declaration of function 'snd_dma_disable':  => 177
>> >> > > > > >   + src/sound/isa/gus/gus_dma.c: error: implicit declaration of function 'snd_dma_program':  => 79
>> >> > > > > >   + src/sound/isa/gus/gus_pcm.c: error: implicit declaration of function 'snd_dma_pointer':  => 619
>> >> > > > > >   + src/sound/isa/gus/gus_pcm.c: error: implicit declaration of function 'snd_dma_program':  => 591
>> >> > > > > >   + src/sound/isa/sb/sb16_main.c: error: implicit declaration of function 'snd_dma_pointer':  => 456
>> >> > > > > >   + src/sound/isa/sb/sb16_main.c: error: implicit declaration of function 'snd_dma_program':  => 276
>> >> > > > > >   + src/sound/isa/sb/sb8_main.c: error: implicit declaration of function 'snd_dma_pointer':  => 425
>> >> > > > > >   + src/sound/isa/sb/sb8_main.c: error: implicit declaration of function 'snd_dma_program':  => 172
>> >> > > > > >   + src/sound/isa/sscape.c: error: implicit declaration of function 'snd_dma_program':  => 481
>> >> > > > > >   + src/sound/isa/wss/wss_lib.c: error: implicit declaration of function 'snd_dma_disable':  => 1695
>> >> > > > > >   + src/sound/isa/wss/wss_lib.c: error: implicit declaration of function 'snd_dma_pointer':  => 1160
>> >> > > > > >   + src/sound/isa/wss/wss_lib.c: error: implicit declaration of function 'snd_dma_program':  => 1025
>> >> > > > >
>> >> > > > > All of these source files do #include <sound/core.h>,
>> >> > > > > but these missing/implicit functions are conditional:
>> >> > > > >
>> >> > > > > #ifdef CONFIG_ISA_DMA_API
>> >> > > > > #define DMA_MODE_NO_ENABLE    0x0100
>> >> > > > >
>> >> > > > > void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
>> >> > > > > void snd_dma_disable(unsigned long dma);
>> >> > > > > unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
>> >> > > > > #endif
>> >> > > > >
>> >> > > > > so should these drivers all depend on ISA_DMA_API ?
>> >> > > >
>> >> > > > Yes, these are ISA sound cards, so they must have CONFIG_ISA and
>> >> > > > CONFIG_ISA_DMA.  Although CONFIG_SND_SB8_DSP, CONFIG_SND_SB16_DSP
>> >> > > > and CONFIG_SND_WSS_LIB have no direct dependency, but the drivers
>> >> > > > selecting these are all in "if SND_ISA" in sound/isa/Kconfig.
>> >> > >
>> >> > > Hm, yes, they are.
>> >> > >
>> >> > > > > or should only pieces of each driver depend on ISA_DMA_API ?
>> >> > > >
>> >> > > > I wonder which configuration makes it possible.
>> >> > > > Did you see a similar problem with randconfig?
>> >> > >
>> >> > > No.  This parisc allmodconfig file from linux-next builds has
>> >> > > CONFIG_SND_ISA=y but it does not have CONFIG_ISA_DMA_API enabled.  Weird.
>> >> > >
>> >> > > Geert, do you know how this happens?
>> >> > >
>> >> > > parisc config:  http://kisskb.ellerman.id.au/kisskb/buildresult/4323458/config/
>> >> > > from this failed build:  http://kisskb.ellerman.id.au/kisskb/buildresult/4323458/
>> >> >
>> >> > How is CONFIG_ISA_DMA_API enabled in parisc allmodconfig?
>> >> > I don't see how that happens, and it's causing build errors...
>> >>
>> >> Sorry, but I don't understand the question.  The problam is that
>> >> CONFIG_ISA_DMA_API is not enabled, right?  On parisc, it is just (from
>> >> arch/parisc/Kconfig)
>> >>
>> >> config ISA_DMA_API
>> >>       bool
>> >>
>> >> and nothing selects it.  However, I would have expected an allmodconfig
>> >> to set it to y.  Clearly I don't understan how allmodconfig works any
>> >> more :-(
>> >>
>> >> Michal, is my understanding correct?  Is this a bug in allmodconfig?
>> >
>> > When I do:
>> > $ make ARCH=parisc O=PAR allmodconfig
>> >
>> > I don't get CONFIG_ISA_DMA_API enabled, so the question is simply
>> > how is the linux-next build system ending up with CONFIG_ISA_DMA_API enabled?
>> >
>> Where do you see that "linux-next build system ending up with
>> CONFIG_ISA_DMA_API enabled" ?
>>
>> From what I understood of the problem, the issue is that
>> CONFIG_ISA_DMA_API does _not_ ends up enabled.
>
> Thanks for catching me.
>
> The problem (second try) is that ISA SND drivers are being built (on parisc)
> even though ISA_DMA_API is not enabled -- and should not be enabled,
> so the ISA SND drivers should not be built.  I think I have it right this time.
>
> From the parisc .config file listed above:
>
> CONFIG_SND_ISA=y
> CONFIG_SND_ADLIB=m
> CONFIG_SND_AD1816A=m
> CONFIG_SND_AD1848=m
> CONFIG_SND_ALS100=m
> CONFIG_SND_AZT1605=m
> CONFIG_SND_AZT2316=m
> CONFIG_SND_AZT2320=m
> CONFIG_SND_CMI8330=m
>
>
> etc.  But none of these should be enabled.  AFAIK.
> So how does this happen?
>
warning: (RADIO_MIROPCM20) selects SND_ISA which has unmet direct
dependencies (SOUND && !M68K && SND && ISA && ISA_DMA_API)

Q.E.D. ...

 - Arnaud
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