linux-kernel - Re: linux-next: build warnings after merge of the ti tree

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Message-ID: <fde87d28-ee5d-4e02-b824-27c1cb7c1e38@kernel.org>
Date:   Fri, 6 Oct 2023 15:03:14 +0300
From:   Roger Quadros <rogerq@...nel.org>
To:     Nishanth Menon <nm@...com>, Rob Herring <robh+dt@...nel.org>
Cc:     "Raghavendra, Vignesh" <vigneshr@...com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Tero Kristo <kristo@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        "Yadav, Nitin" <n-yadav@...com>
Subject: Re: linux-next: build warnings after merge of the ti tree



On 05/10/2023 16:29, Nishanth Menon wrote:
> On 16:12-20231005, Roger Quadros wrote:
>> Hi,
>>
>> On 05/10/2023 11:25, Raghavendra, Vignesh wrote:
>>> + Rob and DT list
>>>
>>> Hi Stephen
>>>
>>> On 10/5/2023 8:45 AM, Stephen Rothwell wrote:
>>>> Hi all,
>>>>
>>>> [I may have missed this yesterday, sorry]
>>>>
>>>> After merging the ti tree, today's linux-next build (arm64 defconfig)
>>>> produced these warnings:
>>>>
>>>> arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso:65.8-140.3: Warning (avoid_default_addr_size): /fragment@..._overlay__: Relying on default #address-cells value
>>>> arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso:65.8-140.3: Warning (avoid_default_addr_size): /fragment@..._overlay__: Relying on default #size-cells value
>>>>
>>>> Introduced by commit
>>>>
>>>>   45a0c06571e1 ("arm64: dts: ti: am642-evm: Add overlay for NAND expansion card")
>>>>
>>>
>>> Thanks for the report. I will drop the offending comment.
>>>
>>> Roger,
>>>
>>> Sorry, this would need to be fixed in dtc or need exception from DT
>>> maintainers to ignore the warnings.
>>
>> Please don't drop this patch as the issue is not with the patch but with
>> the dtc tool itself.
>>
>> As this is a DT overlay there is no way to specify address-cells/size-cells
>> of parent here. This will be resolved only after merge with base tree.
>>
>> This will be fixed in next dtc sync.
>> https://www.spinics.net/lists/devicetree-compiler/msg04036.html
>>
>> See further discussion here
>> https://lore.kernel.org/all/CAL_JsqLmv904+_2EOmsQ__y1yLDvsT+_02i85phuh0cpe7X8NQ@mail.gmail.com/
>>
> 
> Roger, build warnings are a strict NO,NO for kernel. Lets bring in the
> series *after* the dtc sync is complete.
> 

Hi Rob,

Following commit from dtc is required to resolve this issue.

afbddcd418fb ("Suppress warnings on overlay fragments")

FYI. Another patch of similar nature is on its way and will also require the
above commit to DTC.
https://lore.kernel.org/all/20231005093739.4071934-3-n-yadav@ti.com/

-- 
cheers,
-roger