linux-kernel - Re: [RFC/RFT PATCH 2/2] mfd: max14577: Allow driver to be built as a module

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Date:	Fri, 18 Mar 2016 07:50:32 -0300
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>, linux-kernel@...r.kernel.org
Cc:	Lee Jones <lee.jones@...aro.org>
Subject: Re: [RFC/RFT PATCH 2/2] mfd: max14577: Allow driver to be built as a
 module

Hello Chanwoo,

On 03/18/2016 04:55 AM, Chanwoo Choi wrote:
> Hello Javier,
> 
> On 2016년 03월 18일 03:02, Javier Martinez Canillas wrote:
>> Hello Chanwoo
>>
>> On 03/17/2016 01:57 PM, Javier Martinez Canillas wrote:
>>
>> [snip]
>>
>>>>
>>>
>>> Sorry again, this error goes away after I clean the build directory so it
>>> does not happen without this patch-set. Now, I found what's the issue and
>>> is that both the max14577 MFD and regulator drivers have the same object
>>> file name so they both end being called max14577.ko.
>>>
>>> This confuses Kbuild and so in the modpost step, the exported symbols by
>>> the MFD driver don't end into Module.symvers. This doesn't happen when
>>> the driver is not a module since symbols come from the vmlinux binary.
>>>
>>> I'll post a patch to rename the regulator driver to max14577-regulator,
>>> this will be necessary anyways to have max14577 as a module since Kbuild
>>> also gets confused and don't copy both modules because have the same name.
>>>
>>
>> Patch is [0], could you please test the patch-series along with that one
>> and provide your Tested-by? I plan to re-send this series once [0] lands.
> 
> I'll test it on next week and then reply.
>

Perfect, thanks a lot for your help!
 
> Best Regards,
> Chanwoo Choi
> 
>>

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America