linux-kernel - Re: [PATCH v3 1/5] workqueue: Make workqueue_set_unbound

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Message-ID: <6c4ac1fb-f53a-496b-bab6-07e70c2197c7@redhat.com>
Date:   Wed, 15 Nov 2023 16:18:01 -0500
From:   Waiman Long <longman@...hat.com>
To:     kernel test robot <lkp@...el.com>, Tejun Heo <tj@...nel.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Shuah Khan <skhan@...uxfoundation.org>
Cc:     oe-kbuild-all@...ts.linux.dev, cgroups@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, Peter Hunt <pehunt@...hat.com>,
        Frederic Weisbecker <frederic@...nel.org>
Subject: Re: [PATCH v3 1/5] workqueue: Make workqueue_set_unbound_cpumask()
 static


On 11/15/23 14:12, kernel test robot wrote:
> Hi Waiman,
>
> kernel test robot noticed the following build warnings:
>
> [auto build test WARNING on shuah-kselftest/next]
> [also build test WARNING on shuah-kselftest/fixes linus/master v6.7-rc1]
> [cannot apply to tj-cgroup/for-next tj-wq/for-next next-20231115]
> [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/Waiman-Long/workqueue-Make-workqueue_set_unbound_cpumask-static/20231116-010940
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
> patch link:    https://lore.kernel.org/r/20231115170359.163299-2-longman%40redhat.com
> patch subject: [PATCH v3 1/5] workqueue: Make workqueue_set_unbound_cpumask() static
> config: i386-tinyconfig (https://download.01.org/0day-ci/archive/20231116/202311160353.FAdfQwO3-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231116/202311160353.FAdfQwO3-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/202311160353.FAdfQwO3-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
>>> kernel/workqueue.c:4421:13: warning: 'apply_wqattrs_unlock' defined but not used [-Wunused-function]
>      4421 | static void apply_wqattrs_unlock(void)
>           |             ^~~~~~~~~~~~~~~~~~~~
>>> kernel/workqueue.c:4414:13: warning: 'apply_wqattrs_lock' defined but not used [-Wunused-function]
>      4414 | static void apply_wqattrs_lock(void)
>           |             ^~~~~~~~~~~~~~~~~~
>
>
> vim +/apply_wqattrs_unlock +4421 kernel/workqueue.c
>
> 8864b4e59f7945 Tejun Heo                 2013-03-12  4413
> a0111cf6710bd1 Lai Jiangshan             2015-05-19 @4414  static void apply_wqattrs_lock(void)
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4415  {
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4416  	/* CPUs should stay stable across pwq creations and installations */
> ffd8bea81fbb5a Sebastian Andrzej Siewior 2021-08-03  4417  	cpus_read_lock();
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4418  	mutex_lock(&wq_pool_mutex);
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4419  }
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4420
> a0111cf6710bd1 Lai Jiangshan             2015-05-19 @4421  static void apply_wqattrs_unlock(void)
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4422  {
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4423  	mutex_unlock(&wq_pool_mutex);
> ffd8bea81fbb5a Sebastian Andrzej Siewior 2021-08-03  4424  	cpus_read_unlock();
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4425  }
> a0111cf6710bd1 Lai Jiangshan             2015-05-19  4426
>
OK, there are more functions that are CONFIG_SYSFS specific and need to 
be moved as well.

Will post another version to fix that :-(

Regards,
Longman