linux-kernel - Re: [PATCH 6/6] selftests: futex: remove duplicate unneeded defines

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Date:   Thu, 5 Oct 2023 17:06:21 +0500
From:   Muhammad Usama Anjum <usama.anjum@...labora.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        André Almeida <andrealmeid@...lia.com>,
        Shuah Khan <shuah@...nel.org>, kernel@...labora.com,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 6/6] selftests: futex: remove duplicate unneeded defines

On 10/3/23 1:46 PM, Ingo Molnar wrote:
> 
> * Muhammad Usama Anjum <usama.anjum@...labora.com> wrote:
> 
>> Kselftests are kernel tests and must be build with kernel headers from
>> same source version. These duplicate defines should automatically
>> picked up from kernel headers. Use KHDR_INCLUDES to add kernel header
>> files.
>>
>> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
>> ---
>>  .../selftests/futex/include/futextest.h       | 22 -------------------
>>  1 file changed, 22 deletions(-)
>>
>> diff --git a/tools/testing/selftests/futex/include/futextest.h b/tools/testing/selftests/futex/include/futextest.h
>> index ddbcfc9b7bac4..59f66af3a6d10 100644
>> --- a/tools/testing/selftests/futex/include/futextest.h
>> +++ b/tools/testing/selftests/futex/include/futextest.h
>> @@ -25,28 +25,6 @@
>>  typedef volatile u_int32_t futex_t;
>>  #define FUTEX_INITIALIZER 0
>>  
>> -/* Define the newer op codes if the system header file is not up to date. */
>> -#ifndef FUTEX_WAIT_BITSET
>> -#define FUTEX_WAIT_BITSET		9
>> -#endif
>> -#ifndef FUTEX_WAKE_BITSET
>> -#define FUTEX_WAKE_BITSET		10
>> -#endif
>> -#ifndef FUTEX_WAIT_REQUEUE_PI
>> -#define FUTEX_WAIT_REQUEUE_PI		11
>> -#endif
>> -#ifndef FUTEX_CMP_REQUEUE_PI
>> -#define FUTEX_CMP_REQUEUE_PI		12
>> -#endif
>> -#ifndef FUTEX_WAIT_REQUEUE_PI_PRIVATE
>> -#define FUTEX_WAIT_REQUEUE_PI_PRIVATE	(FUTEX_WAIT_REQUEUE_PI | \
>> -					 FUTEX_PRIVATE_FLAG)
>> -#endif
>> -#ifndef FUTEX_REQUEUE_PI_PRIVATE
>> -#define FUTEX_CMP_REQUEUE_PI_PRIVATE	(FUTEX_CMP_REQUEUE_PI | \
>> -					 FUTEX_PRIVATE_FLAG)
>> -#endif
> 
> AFAICT I cannot really pick this up into the locking tree as-is, as this patch
> relies on the KHDR_INCLUDES change in patch #1, so that all self-tests get the
> kernel headers included, correct?
No this patch is self contained and doesn't depend on the patch #1.
KHDR_INCLUDES was included several releases back in kselftest's Makefile
and in kselftests of futex. Correct headers are being included already. In
this patch, I'm removing just the un-needed dead code. Other patches were
already picked up by other maintainers.

> 
> Thanks,
> 
> 	Ingo

-- 
BR,
Muhammad Usama Anjum