linux-kernel - Re: [PATCH v3] selftests/resctrl: fix clang build warnings related to abs(), labs() calls

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Date: Wed, 8 May 2024 13:32:20 -0700
From: John Hubbard <jhubbard@...dia.com>
To: Reinette Chatre <reinette.chatre@...el.com>, Shuah Khan <shuah@...nel.org>
CC: Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers
	<ndesaulniers@...gle.com>, Bill Wendling <morbo@...gle.com>, Justin Stitt
	<justinstitt@...gle.com>, Fenghua Yu <fenghua.yu@...el.com>, Valentin Obst
	<kernel@...entinobst.de>, <linux-kselftest@...r.kernel.org>, LKML
	<linux-kernel@...r.kernel.org>, <llvm@...ts.linux.dev>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: Re: [PATCH v3] selftests/resctrl: fix clang build warnings related to
 abs(), labs() calls

On 5/8/24 1:24 PM, Reinette Chatre wrote:
> Hi John,
> 
> On 5/8/2024 12:41 PM, John Hubbard wrote:
..
>> diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
>> index 7946e32e85c8..5fffbc9ff6a4 100644
>> --- a/tools/testing/selftests/resctrl/mba_test.c
>> +++ b/tools/testing/selftests/resctrl/mba_test.c
>> @@ -60,7 +60,7 @@ static bool show_mba_info(unsigned long *bw_imc, unsigned long *bw_resc)
>>   	/* Memory bandwidth from 100% down to 10% */
>>   	for (allocation = 0; allocation < ALLOCATION_MAX / ALLOCATION_STEP;
>>   	     allocation++) {
>> -		unsigned long avg_bw_imc, avg_bw_resc;
>> +		long avg_bw_imc, avg_bw_resc;
>>   		unsigned long sum_bw_imc = 0, sum_bw_resc = 0;
> 
> nit: since you are touching this line, could you please move it down one line to
> establish reverse fir order?
> 
>>   		int avg_diff_per;
>>   		float avg_diff;
>> diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
>> index d67ffa3ec63a..a4c3ea49b0e8 100644
>> --- a/tools/testing/selftests/resctrl/mbm_test.c
>> +++ b/tools/testing/selftests/resctrl/mbm_test.c
>> @@ -17,7 +17,7 @@
>>   static int
>>   show_bw_info(unsigned long *bw_imc, unsigned long *bw_resc, size_t span)
>>   {
>> -	unsigned long avg_bw_imc = 0, avg_bw_resc = 0;
>> +	long avg_bw_imc = 0, avg_bw_resc = 0;
>>   	unsigned long sum_bw_imc = 0, sum_bw_resc = 0;
>>   	int runs, ret, avg_diff_per;
>>   	float avg_diff = 0;
> 
> Same nit here about reverse fir order.
> 
> Thank you very much for sticking with this to fix the warnings.
> With the nitpicks addressed you can add:
> | Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
> 

Sure, I'll post another one with those two changes and your rb,
thanks for the review(s)!

thanks,
-- 
John Hubbard
NVIDIA