linux-kernel - Re: [PATCH] drivers: gpu: Fix warning using plain integer as NULL

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Date:   Tue, 7 Nov 2023 11:33:41 +0530
From:   Abhinav Singh <singhabhinav9051571833@...il.com>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     alexander.deucher@....com, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: gpu: Fix warning using plain integer as NULL

On 11/7/23 03:07, Alex Deucher wrote:
> On Mon, Nov 6, 2023 at 4:20 PM Abhinav Singh
> <singhabhinav9051571833@...il.com> wrote:
>>
>> On 11/7/23 00:25, Alex Deucher wrote:
>>> Applied.  This matches what we already do in the other clear state headers.
>>>
>>> Alex
>>>
>>> On Fri, Nov 3, 2023 at 12:00 PM Abhinav Singh
>>> <singhabhinav9051571833@...il.com> wrote:
>>>>
>>>> sparse static analysis tools generate a warning with this message
>>>> "Using plain integer as NULL pointer". In this case this warning is
>>>> being shown because we are trying to intialize a pointer to NULL using
>>>> integer value 0.
>>>>
>>>> Signed-off-by: Abhinav Singh <singhabhinav9051571833@...il.com>
>>>> ---
>>>>    drivers/gpu/drm/radeon/clearstate_evergreen.h | 8 ++++----
>>>>    1 file changed, 4 insertions(+), 4 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/radeon/clearstate_evergreen.h b/drivers/gpu/drm/radeon/clearstate_evergreen.h
>>>> index 63a1ffbb3ced..3b645558f133 100644
>>>> --- a/drivers/gpu/drm/radeon/clearstate_evergreen.h
>>>> +++ b/drivers/gpu/drm/radeon/clearstate_evergreen.h
>>>> @@ -1049,7 +1049,7 @@ static const struct cs_extent_def SECT_CONTEXT_defs[] =
>>>>        {SECT_CONTEXT_def_5, 0x0000a29e, 5 },
>>>>        {SECT_CONTEXT_def_6, 0x0000a2a5, 56 },
>>>>        {SECT_CONTEXT_def_7, 0x0000a2de, 290 },
>>>> -    { 0, 0, 0 }
>>>> +    { NULL, 0, 0 }
>>>>    };
>>>>    static const u32 SECT_CLEAR_def_1[] =
>>>>    {
>>>> @@ -1060,7 +1060,7 @@ static const u32 SECT_CLEAR_def_1[] =
>>>>    static const struct cs_extent_def SECT_CLEAR_defs[] =
>>>>    {
>>>>        {SECT_CLEAR_def_1, 0x0000ffc0, 3 },
>>>> -    { 0, 0, 0 }
>>>> +    { NULL, 0, 0 }
>>>>    };
>>>>    static const u32 SECT_CTRLCONST_def_1[] =
>>>>    {
>>>> @@ -1070,11 +1070,11 @@ static const u32 SECT_CTRLCONST_def_1[] =
>>>>    static const struct cs_extent_def SECT_CTRLCONST_defs[] =
>>>>    {
>>>>        {SECT_CTRLCONST_def_1, 0x0000f3fc, 2 },
>>>> -    { 0, 0, 0 }
>>>> +    { NULL, 0, 0 }
>>>>    };
>>>>    static const struct cs_section_def evergreen_cs_data[] = {
>>>>        { SECT_CONTEXT_defs, SECT_CONTEXT },
>>>>        { SECT_CLEAR_defs, SECT_CLEAR },
>>>>        { SECT_CTRLCONST_defs, SECT_CTRLCONST },
>>>> -    { 0, SECT_NONE }
>>>> +    { NULL, SECT_NONE }
>>>>    };
>>>> --
>>>> 2.39.2
>>>>
>> Hi Alex, thanks for looking into this. By applied you mean this patch is
>> accepted and it has been merged?
> 
> Yes.  Once it makes it through our CI system, it will show up in my
> drm-next tree.
> 
> Alex
Okay, this is my first patch to get into kernel :)
Thank you once again for your time with this patch and accepting it.