linux-kernel - Re: [PATCH 2/2] kunit: add tips to clean source tree to build help message

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Message-ID: <949a6ddc-4663-4b41-9f08-a3c0d07307af@linuxfoundation.org>
Date: Wed, 30 Apr 2025 18:40:14 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: David Gow <davidgow@...gle.com>
Cc: brendan.higgins@...ux.dev, rmoar@...gle.com, corbet@....net,
 linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
 workflows@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org, Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH 2/2] kunit: add tips to clean source tree to build help
 message

On 4/30/25 15:25, Shuah Khan wrote:
> On 4/29/25 21:54, David Gow wrote:
>> On Wed, 30 Apr 2025 at 06:27, Shuah Khan <skhan@...uxfoundation.org> wrote:
>>>
>>> Add tips to clean source tree to build help message. When user run
>>> kunit.py after building another kernel for ARCH=foo, it is necessary
>>> to run 'make ARCH=foo mrproper' to remove all build artifacts generated
>>> during the build. In such cases, kunit build could fail.
>>>
>>> Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
>>> ---
>>
>> Thanks for doing this.
>>
>> This looks good to me, save for the issue below.
>>
>> I do wonder whether there's a more general fix we can do in the
>> makefiles, but I'm not sure how that'd have to work. Maybe by storing
>> the architecture used somewhere and amending the error based on that,
>> or hacking around the specific x86_64/UML incompatibilities. But let's
>> go ahead with this fix regardless.
> 
> I agree the right fix is to see if kunit.py can suggest the right arch
> to clean. I will take a look at that.

It is an easy change to the main Makefile. Will send the patch tomorrow.
We won't need the documentation and help message changes with the main
Makefile change.

thanks,
-- Shuah