linux-kernel - Re: drm/amdkfd: bad CONFIG_ prefix for enum entries

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Date:	Thu, 04 Jun 2015 18:47:53 +0200
From:	Christian König <deathsimple@...afone.de>
To:	Alex Deucher <alexdeucher@...il.com>,
	Valentin Rothberg <valentinrothberg@...il.com>
CC:	Paul Bolle <pebolle@...cali.nl>,
	Andreas Ruprecht <andreas.ruprecht@....de>,
	Maling list - DRI developers 
	<dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	hengelein Stefan <stefan.hengelein@....de>
Subject: Re: drm/amdkfd: bad CONFIG_ prefix for enum entries

On 04.06.2015 17:09, Alex Deucher wrote:
> On Thu, Jun 4, 2015 at 10:04 AM, Valentin Rothberg
> <valentinrothberg@...il.com> wrote:
>> Hi Alex,
>>
>> On Thu, Jun 4, 2015 at 4:01 PM, Alex Deucher <alexdeucher@...il.com> wrote:
>>> On Thu, Jun 4, 2015 at 9:48 AM, Oded Gabbay <oded.gabbay@...il.com> wrote:
>>>> Hi Valentin,
>>>> Thanks for catching that.
>>>> I would be grateful if you could fix this yourself.
>>> Please try and keep CONFIG in the name since this range of registers
>>> are called CONFIG registers.
>> I cannot force changing those symbols, but point out that it's
>> violating naming conventions.  I would suggest to s/CONFIG_/CONF_/ to
>> make clear that it's config registers.  Would you be fine with that?
> What about something like AMD_CONFIG_REG?

For the background: The register headers will be auto generated in the 
future and if the hardware designer named the register CONFIG_* the name 
will show up in our headers as such.

Prefixing it with AMD_ sounds like a good solution to me, too.

Regards,
Christian.

>
>> Kind regards,
>>   Valentin
>>
>>> Alex
>>>
>>>> Oded
>>>>
>>>> On Thu, Jun 4, 2015 at 4:45 PM Valentin Rothberg
>>>> <valentinrothberg@...il.com> wrote:
>>>>> Hi Yair,
>>>>>
>>>>> your commit fbeb661bfa89 ("drm/amdkfd: Add skeleton H/W debugger
>>>>> module support") has shown up in today's linux-next tree (i.e.,
>>>>> next-20150604).  The commit adds the following lines of code to
>>>>> drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.h:
>>>>>
>>>>> +/* CONFIG reg space definition */
>>>>> +enum {
>>>>> +       CONFIG_REG_BASE = 0x2000,       /* in dwords */
>>>>> +       CONFIG_REG_END = 0x2B00,
>>>>> +       CONFIG_REG_SIZE = CONFIG_REG_END - CONFIG_REG_BASE
>>>>> +};
>>>>>
>>>>> There is a problem with the 'CONFIG_' prefix of those entries.  This
>>>>> prefix is reserved for Kconfig options in Make/Kbuild and CPP syntax,
>>>>> so that static analysis tools (and readers of the code) may mistakenly
>>>>> assume that the symbol is defined somewhere in a Kconfig file.
>>>>>
>>>>> I detected the issue with ./scripts/checkkconfigsymbols.py.  Would you
>>>>> mind renaming those entries to something without the 'CONFIG_' prefix?
>>>>>   I can also take care of it if you wish to.
>>>>>
>>>>> Kind regards,
>>>>>   Valentin
>>>>
>>>> _______________________________________________
>>>> dri-devel mailing list
>>>> dri-devel@...ts.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>>>>
> _______________________________________________
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> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel

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