linux-kernel - Re: [PATCH v4 md-fixes 3/3] md: fix stopping sync thread

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Message-ID: <202312051758.ZlpYxGpJ-lkp@intel.com>
Date:   Tue, 5 Dec 2023 17:14:25 +0800
From:   kernel test robot <lkp@...el.com>
To:     Yu Kuai <yukuai1@...weicloud.com>, song@...nel.org, xni@...hat.com,
        yukuai3@...wei.com, neilb@...e.com
Cc:     oe-kbuild-all@...ts.linux.dev, linux-raid@...r.kernel.org,
        linux-kernel@...r.kernel.org, yukuai1@...weicloud.com,
        yi.zhang@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH v4 md-fixes 3/3] md: fix stopping sync thread

Hi Yu,

kernel test robot noticed the following build warnings:

[auto build test WARNING on song-md/md-next]
[also build test WARNING on linus/master v6.7-rc4 next-20231205]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yu-Kuai/md-fix-missing-flush-of-sync_work/20231204-215956
base:   git://git.kernel.org/pub/scm/linux/kernel/git/song/md.git md-next
patch link:    https://lore.kernel.org/r/20231204135732.3647886-4-yukuai1%40huaweicloud.com
patch subject: [PATCH v4 md-fixes 3/3] md: fix stopping sync thread
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20231205/202312051758.ZlpYxGpJ-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231205/202312051758.ZlpYxGpJ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312051758.ZlpYxGpJ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/md/md.c: In function 'idle_sync_thread':
>> drivers/md/md.c:4897:13: warning: unused variable 'sync_seq' [-Wunused-variable]
    4897 |         int sync_seq = atomic_read(&mddev->sync_seq);
         |             ^~~~~~~~


vim +/sync_seq +4897 drivers/md/md.c

64e5e09afc14f8 Yu Kuai 2023-05-29  4894  
64e5e09afc14f8 Yu Kuai 2023-05-29  4895  static void idle_sync_thread(struct mddev *mddev)
64e5e09afc14f8 Yu Kuai 2023-05-29  4896  {
130443d60b1b8c Yu Kuai 2023-05-29 @4897  	int sync_seq = atomic_read(&mddev->sync_seq);
130443d60b1b8c Yu Kuai 2023-05-29  4898  
6f56f0c4f1241f Yu Kuai 2023-05-29  4899  	mutex_lock(&mddev->sync_mutex);
64e5e09afc14f8 Yu Kuai 2023-05-29  4900  	clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
130443d60b1b8c Yu Kuai 2023-05-29  4901  
fde7b408a7cb14 Yu Kuai 2023-12-04  4902  	if (mddev_lock(mddev)) {
fde7b408a7cb14 Yu Kuai 2023-12-04  4903  		mutex_unlock(&mddev->sync_mutex);
fde7b408a7cb14 Yu Kuai 2023-12-04  4904  		return;
fde7b408a7cb14 Yu Kuai 2023-12-04  4905  	}
130443d60b1b8c Yu Kuai 2023-05-29  4906  
fde7b408a7cb14 Yu Kuai 2023-12-04  4907  	stop_sync_thread(mddev, false, true);
6f56f0c4f1241f Yu Kuai 2023-05-29  4908  	mutex_unlock(&mddev->sync_mutex);
64e5e09afc14f8 Yu Kuai 2023-05-29  4909  }
64e5e09afc14f8 Yu Kuai 2023-05-29  4910  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki