linux-kernel - Re: [PATCH] drivers/mfd/ucb1400_core.c: fix undefined reference to `ac97_bus

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Date:	Mon, 13 Oct 2008 00:38:56 -0300
From:	Sergio Luis <sergio@...ces.uece.br>
To:	Randy Dunlap <randy.dunlap@...cle.com>
CC:	linux-kernel@...r.kernel.org, Marek Vasut <marek.vasut@...il.com>
Subject: Re: [PATCH] drivers/mfd/ucb1400_core.c: fix undefined reference to
 `ac97_bus_type'

Randy Dunlap wrote:
> On Sun, 12 Oct 2008 13:18:13 -0300 Sergio Luis wrote:
> 
>> randconfig got a problem with ucb1400_core.c (config attached)
>>
>> drivers/built-in.o:(.data+0x15ab4): undefined reference to `ac97_bus_type'
>> make: *** [.tmp_vmlinux1] Error 1
>>
>> ucb1400 is an ac97 audio codec. express this dependency in Kconfig
>>
>> Signed-off-by: Sergio Luis <sergio@...ces.uece.br>
>> Cc: Marek Vasut <marek.vasut@...il.com>
>>
>> drivers/mfd/Kconfig |    1 +
>>  1 files changed, 1 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>> index 0dae245..fa851c5 100644
>> --- a/drivers/mfd/Kconfig
>> +++ b/drivers/mfd/Kconfig
>> @@ -52,6 +52,7 @@ config HTC_PASIC3
>>  
>>  config UCB1400_CORE
>>  	tristate "Philips UCB1400 Core driver"
>> +	select AC97_BUS
>>  	help
>>  	  This enables support for the Philips UCB1400 core functions.
>>  	  The UCB1400 is an AC97 audio codec.
> 
> Hi,
> 
> Andrew has a "depends on AC97_BUS" patch queued and approved... fwiw.
> 
> The problem with "select AC97_BUS" is that SOUND could be =n and
> selecting AC97_BUS still will not enable SOUND, so it's useless
> (unless/until kconfig is taught to follow select dependencies).
> 
> ---
> ~Randy

Ah, yeah, you are correct. Thanks for the explanation.

Sergio.
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