Subject: Re: randconfig build error with next-20150812, in drivers/i2c/busses/i2c-i801.c

From: Matt Fleming <[email-masked]>
Date: Fri, 25 Sep 2015 14:37:57 +0100

On Fri, 25 Sep, at 09:36:10AM, Jean Delvare wrote:
> On Wed, 12 Aug 2015 08:42:18 -0700, Jim Davis wrote:
> > Building with the attached random configuration file,
> > 
> > drivers/built-in.o: In function `dmi_check_onboard_devices':
> > i2c-i801.c:(.text+0x126b36): undefined reference to `i2c_new_device'
> > drivers/built-in.o: In function `i801_remove':
> > i2c-i801.c:(.text+0x126b86): undefined reference to `i2c_del_adapter'
> > drivers/built-in.o: In function `i801_probe':
> > i2c-i801.c:(.text+0x127d08): undefined reference to `i2c_add_adapter'
> > i2c-i801.c:(.text+0x127d6e): undefined reference to `i2c_new_device'
> 
> Sorry for the late reply. The error is caused by the following
> combination of options:
> 
> CONFIG_I2C=m
> CONFIG_I2C_I801=y
> 
> I can reproduce it even with mainline now. This is caused by
> CONFIG_ITCO_WDT=y, which selects CONFIG_I2C_I801=y without selecting
> its dependencies (CONFIG_I2C.)
> 
> Thanks for reporting, I'll post a fix shortly.

Sorry that you got caught up in this build error Jean.

Guenter (Cc'd) posted a fix here,

  https://lkml.kernel.org/r/[email-masked]

-- 
Matt Fleming, Intel Open Source Technology Center