linux-kernel - Re: [PATCH 1/2] soc: export soc_device_to

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Message-ID: <e704f783-50d7-8295-a8e2-9df8a176174f@canonical.com>
Date:   Sun, 19 Sep 2021 11:12:29 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Sylwester Nawrocki <snawrocki@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Pankaj Dubey <pankaj.dubey@...sung.com>
Subject: Re: [PATCH 1/2] soc: export soc_device_to_device symbol

On 18/09/2021 09:02, Greg Kroah-Hartman wrote:
> On Fri, Sep 17, 2021 at 07:51:33PM +0200, Krzysztof Kozlowski wrote:
>> In case if soc-bus drivers are modules soc_device_to_device() has to be
>> exported.  Since it is trivial, export it as non-GPL.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
>> ---
>>  drivers/base/soc.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/base/soc.c b/drivers/base/soc.c
>> index 0af5363a582c..ac8db303daa1 100644
>> --- a/drivers/base/soc.c
>> +++ b/drivers/base/soc.c
>> @@ -41,6 +41,7 @@ struct device *soc_device_to_device(struct soc_device *soc_dev)
>>  {
>>  	return &soc_dev->dev;
>>  }
>> +EXPORT_SYMBOL(soc_device_to_device);
> 
> I thought we were getting rid of the use of this function, why export it
> and not just fix it up instead?
> 
> Or am I confused about some other soc device abuse...

I was not aware of discussion about soc_device_to_device(). Thanks for
pointing out the issue. I googled a little and found previous talks:
https://lore.kernel.org/lkml/20191111052741.GB3176397@kroah.com/

I can easily get rid of soc_device_to_device() in my driver, so first
patch won't be needed.

Best regards,
Krzysztof