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

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Le Friday 25 September 2015 à 14:37 +0100, Matt Fleming a écrit :
> 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.

No big deal :)

> Guenter (Cc'd) posted a fix here,
> 
>   https://lkml.kernel.org/r/1441978088-27288-1-git-send-email-linux@xxxxxxxxxxxx

Actually I prefer Guenter's approach. I am never comfortable with
drivers selecting subsystems. So you can add:

Acked-by: Jean Delvare <jdelvare@xxxxxxx>

to Guenter's patch and drop mine.

Thanks,
-- 
Jean Delvare
SUSE L3 Support

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