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

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Date:	Sun, 12 Oct 2008 15:03:28 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Sergio Luis <sergio@...ces.uece.br>
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'

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
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