linux-kernel - Re: [PATCH 1/2] doc: kunit: add information about cleaning source trees

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Message-ID: <589336a3-4df5-4f58-a627-2b75716f7b61@linuxfoundation.org>
Date: Tue, 29 Apr 2025 17:33:05 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Randy Dunlap <rdunlap@...radead.org>, brendan.higgins@...ux.dev,
 davidgow@...gle.com, rmoar@...gle.com, corbet@....net
Cc: 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 1/2] doc: kunit: add information about cleaning source
 trees

On 4/29/25 16:29, Randy Dunlap wrote:
> 
> 
> On 4/29/25 3:27 PM, Shuah Khan wrote:
>> If kunit run happens in a tree in which a x86_64 kernel was built,
>> the source tree could be dirty.
>>
>> "make ARCH=um mrproper" will not clean the x86_64 build artifacts.
>> Running "make ARCH=x86_64 mrproper" is necessary to clean them.
>>
>> Add this information to the documentation.
>>
>> Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
>> ---
>>   Documentation/dev-tools/kunit/start.rst | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>>
>> diff --git a/Documentation/dev-tools/kunit/start.rst b/Documentation/dev-tools/kunit/start.rst
>> index a98235326bab..568e29aebd6e 100644
>> --- a/Documentation/dev-tools/kunit/start.rst
>> +++ b/Documentation/dev-tools/kunit/start.rst
>> @@ -39,6 +39,18 @@ can run kunit_tool:
>>   	``make ARCH=um mrproper``, just be aware that this will delete the
>>   	current configuration and all generated files.
>>   
>> +	You may see the following error if a prior build leaves behind
>> +	header files which 'make ARCH=um mrproper' fails to clean:
>> +
>> +	"undefined symbol sev_es_trampoline_start referenced ..."
>> +
>> +	This is special case scenario when a prior x86_64 build populates
>> +	the source tree with arch/x86/realmode/rm/pasyms.h. This header
>> +	will not be cleaned by 'make ARCH=um mrproper'
>> +
>> +	If you encouter this problem, run 'make ARCH=x86_64 mrproper' to
> 
> 	       encounter

Thank you. Will fix it.

thanks,
-- Shuah