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From: "Chen, Rong A" <rong.a.chen@intel.com>
To: Peter Zijlstra <peterz@infradead.org>, kernel test robot <lkp@intel.com>
Cc: Yafang Shao <laoar.shao@gmail.com>,
	llvm@lists.linux.dev, kbuild-all@lists.01.org,
	linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [kbuild-all] Re: [tip:sched/core 14/47] kernel/sched/fair.c:893:22: error: variable 'p' set but not used
Date: Tue, 12 Oct 2021 22:31:01 +0800	[thread overview]
Message-ID: <40d464a8-86b6-d4cf-6e3a-d0712ac351c3@intel.com> (raw)
In-Reply-To: <YWVw/oVd5ztGZDAK@hirez.programming.kicks-ass.net>



On 10/12/2021 7:26 PM, Peter Zijlstra wrote:
> On Tue, Oct 12, 2021 at 11:57:41AM +0800, kernel test robot wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
>> head:   b2d5b9cec60fecc72a13191c2c6c05acf60975a5
>> commit: 60f2415e19d3948641149ac6aca137a7be1d1952 [14/47] sched: Make schedstats helpers independent of fair sched class
>> config: hexagon-buildonly-randconfig-r002-20211012 (attached as .config)
>> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dcf39554dbea780d6cb7e12239451ba47a2668)
>> reproduce (this is a W=1 build):
>>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>          chmod +x ~/bin/make.cross
>>          # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=60f2415e19d3948641149ac6aca137a7be1d1952
>>          git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
>>          git fetch --no-tags tip sched/core
>>          git checkout 60f2415e19d3948641149ac6aca137a7be1d1952
>>          # save the attached .config to linux build tree
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@intel.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>     kernel/sched/fair.c:860:28: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>                     struct sched_statistics *stats;
>>                                              ^
>>     kernel/sched/fair.c:892:27: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct sched_statistics *stats;
>>                                      ^
>>>> kernel/sched/fair.c:893:22: error: variable 'p' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct task_struct *p = NULL;
>>                                 ^
>>     kernel/sched/fair.c:910:22: error: variable 'p' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct task_struct *p = NULL;
>>                                 ^
>>     kernel/sched/fair.c:909:27: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct sched_statistics *stats;
>>                                      ^
>>>> kernel/sched/fair.c:936:22: error: variable 'tsk' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct task_struct *tsk = NULL;
>>                                 ^
>>     kernel/sched/fair.c:935:27: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct sched_statistics *stats;
>>                                      ^
>>     kernel/sched/fair.c:4451:28: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>                     struct sched_statistics *stats;
>>                                              ^
>>     8 errors generated.
> 
> Again, I have absolutely no intention of fixing this. IMO this is the
> compiler being a total pain in the arse.
> 
> Please stop reporting this.

Hi Peterz,

Sorry for the noise, we'll ignore the unused-but-set-variable warning in
kernel/sched/ part. Is there any other issue should be ignored?

Best Regards,
Rong Chen

WARNING: multiple messages have this Message-ID (diff)
From: Chen, Rong A <rong.a.chen@intel.com>
To: kbuild-all@lists.01.org
Subject: Re: [tip:sched/core 14/47] kernel/sched/fair.c:893:22: error: variable 'p' set but not used
Date: Tue, 12 Oct 2021 22:31:01 +0800	[thread overview]
Message-ID: <40d464a8-86b6-d4cf-6e3a-d0712ac351c3@intel.com> (raw)
In-Reply-To: <YWVw/oVd5ztGZDAK@hirez.programming.kicks-ass.net>

[-- Attachment #1: Type: text/plain, Size: 3411 bytes --]



On 10/12/2021 7:26 PM, Peter Zijlstra wrote:
> On Tue, Oct 12, 2021 at 11:57:41AM +0800, kernel test robot wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
>> head:   b2d5b9cec60fecc72a13191c2c6c05acf60975a5
>> commit: 60f2415e19d3948641149ac6aca137a7be1d1952 [14/47] sched: Make schedstats helpers independent of fair sched class
>> config: hexagon-buildonly-randconfig-r002-20211012 (attached as .config)
>> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dcf39554dbea780d6cb7e12239451ba47a2668)
>> reproduce (this is a W=1 build):
>>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>          chmod +x ~/bin/make.cross
>>          # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=60f2415e19d3948641149ac6aca137a7be1d1952
>>          git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
>>          git fetch --no-tags tip sched/core
>>          git checkout 60f2415e19d3948641149ac6aca137a7be1d1952
>>          # save the attached .config to linux build tree
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@intel.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>     kernel/sched/fair.c:860:28: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>                     struct sched_statistics *stats;
>>                                              ^
>>     kernel/sched/fair.c:892:27: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct sched_statistics *stats;
>>                                      ^
>>>> kernel/sched/fair.c:893:22: error: variable 'p' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct task_struct *p = NULL;
>>                                 ^
>>     kernel/sched/fair.c:910:22: error: variable 'p' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct task_struct *p = NULL;
>>                                 ^
>>     kernel/sched/fair.c:909:27: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct sched_statistics *stats;
>>                                      ^
>>>> kernel/sched/fair.c:936:22: error: variable 'tsk' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct task_struct *tsk = NULL;
>>                                 ^
>>     kernel/sched/fair.c:935:27: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>             struct sched_statistics *stats;
>>                                      ^
>>     kernel/sched/fair.c:4451:28: error: variable 'stats' set but not used [-Werror,-Wunused-but-set-variable]
>>                     struct sched_statistics *stats;
>>                                              ^
>>     8 errors generated.
> 
> Again, I have absolutely no intention of fixing this. IMO this is the
> compiler being a total pain in the arse.
> 
> Please stop reporting this.

Hi Peterz,

Sorry for the noise, we'll ignore the unused-but-set-variable warning in
kernel/sched/ part. Is there any other issue should be ignored?

Best Regards,
Rong Chen

  parent reply	other threads:[~2021-10-12 14:31 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-12  3:57 [tip:sched/core 14/47] kernel/sched/fair.c:893:22: error: variable 'p' set but not used kernel test robot
2021-10-12  3:57 ` kernel test robot
2021-10-12 11:26 ` Peter Zijlstra
2021-10-12 11:26   ` Peter Zijlstra
2021-10-12 13:35   ` Peter Zijlstra
2021-10-12 13:35     ` Peter Zijlstra
2021-10-13  6:18     ` Yafang Shao
2021-10-13  6:18       ` Yafang Shao
2021-10-14  4:23     ` Nathan Chancellor
2021-10-14  4:23       ` Nathan Chancellor
2021-10-14 15:08       ` Peter Zijlstra
2021-10-14 15:08         ` Peter Zijlstra
2021-10-15  9:45     ` [tip: sched/core] sched: Disable -Wunused-but-set-variable tip-bot2 for Peter Zijlstra
2021-10-12 14:31   ` Chen, Rong A [this message]
2021-10-12 14:31     ` [tip:sched/core 14/47] kernel/sched/fair.c:893:22: error: variable 'p' set but not used Chen, Rong A

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