linux-kernel - Re: [PATCH 1/3] drm/amdgpu/display: provide ASSERT macros unconditionally

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Date:   Thu, 2 Nov 2017 10:26:05 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Felix Kuehling <felix.kuehling@....com>,
        David Airlie <airlied@...ux.ie>,
        "Edward O'Callaghan" <funfunctor@...klore1984.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Tony Cheng <Tony.Cheng@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Dave Airlie <airlied@...hat.com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH 1/3] drm/amdgpu/display: provide ASSERT macros unconditionally

On Thu, Nov 2, 2017 at 10:20 AM, Arnd Bergmann <arnd@...db.de> wrote:
> On Thu, Nov 2, 2017 at 3:09 PM, Felix Kuehling <felix.kuehling@....com> wrote:
>> On 2017-11-02 07:26 AM, Arnd Bergmann wrote:
>>> It seems impossible to build this driver without setting either
>>> CONFIG_DEBUG_KERNEL or CONFIG_DEBUG_DRIVER:
>>>
>>> drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h: In function 'set_reg_field_value_ex':
>>> drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:132:2: error: implicit declaration of function 'ASSERT'; did you mean 'IS_ERR'? [-Werror=implicit-function-declaration]
>>>
>>> This moves the ASSERT() macro and related helpers outside of
>>> the #ifdef to get it to build again.
>>>
>>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>>> ---
>>>  drivers/gpu/drm/amd/display/dc/os_types.h | 6 +-----
>>>  1 file changed, 1 insertion(+), 5 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/display/dc/os_types.h b/drivers/gpu/drm/amd/display/dc/os_types.h
>>> index 86170b40b5c5..499bd52004cf 100644
>>> --- a/drivers/gpu/drm/amd/display/dc/os_types.h
>>> +++ b/drivers/gpu/drm/amd/display/dc/os_types.h
>>> @@ -61,8 +61,6 @@
>>>   * general debug capabilities
>>>   *
>>>   */
>>> -#if defined(CONFIG_DEBUG_KERNEL) || defined(CONFIG_DEBUG_DRIVER)
>>> -
>>>  #if defined(CONFIG_HAVE_KGDB) || defined(CONFIG_KGDB)
>>>  #define ASSERT_CRITICAL(expr) do {   \
>>>       if (WARN_ON(!(expr))) { \
>>> @@ -75,7 +73,7 @@
>>>               ; \
>>>       } \
>>>  } while (0)
>>> -#endif
>>> +#endif /* CONFIG_DEBUG_KERNEL || CONFIG_DEBUG_DRIVER */
>>
>> Is this the right comment here? Looks like it should be /*
>> defined(CONFIG_HAVE_KGDB) || defined(CONFIG_KGDB) */.
>
> Right, my mistake. I had tried a couple of different versions before I found
> one that built in all configurations. This slipped through. I'll send a fixed
> version of this one patch but not the other two in the series if that's ok.

Sounds good.  Thanks!

Alex