Re: [PATCH v2] um/drivers: Kconfig: fix hostaudio build errors

From: Randy Dunlap <rdunlap@infradead.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: linux-kernel@vger.kernel.org, kernel test robot <lkp@intel.com>,
	Richard Weinberger <richard@nod.at>,
	Anton Ivanov <anton.ivanov@cambridgegreys.com>,
	Johannes Berg <johannes@sipsolutions.net>,
	linux-um@lists.infradead.org, Tejun Heo <tj@kernel.org>,
	Jaroslav Kysela <perex@perex.cz>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Nicolas Schier <nicolas@fjasle.eu>,
	linux-kbuild@vger.kernel.org
Subject: Re: [PATCH v2] um/drivers: Kconfig: fix hostaudio build errors
Date: Tue, 25 Jul 2023 11:19:46 -0700	[thread overview]
Message-ID: <5e56d4a9-2671-caf7-c267-9beec6f14aa3@infradead.org> (raw)
In-Reply-To: <87jzuoth7s.wl-tiwai@suse.de>

On 7/25/23 03:31, Takashi Iwai wrote:
> On Sun, 23 Jul 2023 23:57:56 +0200,
> Randy Dunlap wrote:
>>
>> Use "select"s to ensure that the required kconfig symbols are set
>> as expected.
>>
>> This fixes build errors when CONFIG_SOUND is not set.
>>
>> ld: arch/um/drivers/hostaudio_kern.o: in function `hostaudio_cleanup_module':
>> hostaudio_kern.c:(.exit.text+0xa): undefined reference to `unregister_sound_mixer'
>> ld: hostaudio_kern.c:(.exit.text+0x15): undefined reference to `unregister_sound_dsp'
>> ld: arch/um/drivers/hostaudio_kern.o: in function `hostaudio_init_module':
>> hostaudio_kern.c:(.init.text+0x19): undefined reference to `register_sound_dsp'
>> ld: hostaudio_kern.c:(.init.text+0x31): undefined reference to `register_sound_mixer'
>> ld: hostaudio_kern.c:(.init.text+0x49): undefined reference to `unregister_sound_dsp'
>>
>> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
>> Fixes: d886e87cb82b ("sound: make OSS sound core optional")
>> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
>> Reported-by: kernel test robot <lkp@intel.com>
>> Link: lore.kernel.org/r/202307141416.vxuRVpFv-lkp@intel.com
>> Cc: Richard Weinberger <richard@nod.at>
>> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
>> Cc: Johannes Berg <johannes@sipsolutions.net>
>> Cc: linux-um@lists.infradead.org
>> Cc: Tejun Heo <tj@kernel.org>
>> Cc: Takashi Iwai <tiwai@suse.de>
>> Cc: Jaroslav Kysela <perex@perex.cz>
>> Cc: Masahiro Yamada <masahiroy@kernel.org>
>> Cc: Nathan Chancellor <nathan@kernel.org>
>> Cc: Nick Desaulniers <ndesaulniers@google.com>
>> Cc: Nicolas Schier <nicolas@fjasle.eu>
>> Cc: linux-kbuild@vger.kernel.org
>> ---
>> v2: don't delete the HOSTAUDIO Kconfig entry (Masahiro)
>>
>>  arch/um/drivers/Kconfig |   10 ++--------
>>  1 file changed, 2 insertions(+), 8 deletions(-)
>>
>> diff -- a/arch/um/drivers/Kconfig b/arch/um/drivers/Kconfig
>> --- a/arch/um/drivers/Kconfig
>> +++ b/arch/um/drivers/Kconfig
>> @@ -111,20 +111,14 @@ config SSL_CHAN
>>  
>>  config UML_SOUND
>>  	tristate "Sound support"
>> +	select SOUND
>> +	select SOUND_OSS_CORE
>>  	help
>>  	  This option enables UML sound support.  If enabled, it will pull in
>>  	  soundcore and the UML hostaudio relay, which acts as a intermediary
>>  	  between the host's dsp and mixer devices and the UML sound system.
>>  	  It is safe to say 'Y' here.
>>  
>> -config SOUND
>> -	tristate
>> -	default UML_SOUND
>> -
>> -config SOUND_OSS_CORE
>> -	bool
>> -	default UML_SOUND
>> -
>>  config HOSTAUDIO
>>  	tristate
>>  	default UML_SOUND
> 
> And now essentially CONFIG_HOSTAUDIO is equal with CONFIG_UML_SOUND.
> Then isn't it better to replace CONFIG_HOSTAUDIO in
> arch/um/drivers/Makefile with CONFIG_UML_SOUND, so that you can drop
> CONFIG_HOSTAUDIO as well?

OK, I'll send a v3 with that change.

thanks.
-- 
~Randy

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