linux-kernel - Re: linux-next: Tree for Apr 8 (iio/adc/)

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Date:   Mon, 15 Apr 2019 15:13:44 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>
CC:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        <linux-iio@...r.kernel.org>
Subject: Re: linux-next: Tree for Apr 8 (iio/adc/)

On 4/14/19 2:30 PM, Jonathan Cameron wrote:
> On Mon, 8 Apr 2019 09:09:37 -0700
> Randy Dunlap <rdunlap@...radead.org> wrote:
> 
>> On 4/7/19 10:41 PM, Stephen Rothwell wrote:
>>> Hi all,
>>>
>>> Changes since 20190405:
>>>   
>>
>> on i386 or x86_64:
>>
>> modular:
>> ERROR: "is_stm32_timer_trigger" [drivers/iio/adc/stm32-dfsdm-adc.ko] undefined!
>>
>> or builtin:
>> ld: drivers/iio/adc/stm32-dfsdm-adc.o: in function `stm32_dfsdm_postenable':
>> stm32-dfsdm-adc.c:(.text+0x878): undefined reference to `is_stm32_timer_trigger'
>>
>>
>> Full i386 randconfig file is attached.
>>
> Thanks Randy.
> 
> So two possible fixes for this one.  We can do what is done for the
> stm32-adc driver and select IIO_STM_TIMER_TRIGGER or we can add a stub
> for this function in the header to make it return false if that
> driver isn't built.
> 
> I personally favour the stub option but would like Fabrice to say what
> makes more sense.
> 
> So Fabrice, which of the above? If you are busy and don't get back
> in the next day or two, I'll add the stub.

Hi Jonathan, Randy,

I've posted 3 patches:
- One to fix the current issue, with the stub option [1]. This makes
sense as the STM32 DFSDM can use timer and/or lptimer. I think I'll post
another patch later to remove the select in STM32_ADC config (no longer
needed then... But it's not the subject here, right ?).
- Two other patches to fix other warning/build issues I've seen while
working on the stub option. See [2]:

[1] https://lkml.org/lkml/2019/4/15/223
[2] https://lkml.org/lkml/2019/4/15/437

Sorry for the inconvenience, I should have seen this earlier.

Thanks,
Best Regards,
Fabrice

> 
> Thanks,
> 
> Jonathan
>