linux-kernel - Re: [PATCH 1/2] sched/core: Get rid of 'cpu' argument in wq_worker

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Date:	Mon, 29 Feb 2016 01:47:36 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Alexander Gordeev <agordeev@...hat.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Alexander Gordeev <agordeev@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 1/2] sched/core: Get rid of 'cpu' argument in
 wq_worker_sleeping()

Hi Alexander,

[auto build test WARNING on wq/for-next]
[also build test WARNING on v4.5-rc6 next-20160226]
[cannot apply to tip/sched/core]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Alexander-Gordeev/sched-core-Cleanup-leftovers-in-__schedule/20160229-004522
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-next
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   include/linux/init.h:1: warning: no structured comments found
>> kernel/workqueue.c:874: warning: Excess function parameter 'cpu' description in 'wq_worker_sleeping'
   kernel/sys.c:1: warning: no structured comments found
   drivers/dma-buf/seqno-fence.c:1: warning: no structured comments found
   drivers/dma-buf/reservation.c:1: warning: no structured comments found
   include/linux/reservation.h:1: warning: no structured comments found
   include/linux/spi/spi.h:540: warning: No description found for parameter 'max_transfer_size'

vim +874 kernel/workqueue.c

0fcb78c22f Rolf Eike Beer    2006-07-30  858  /**
e22bee782b Tejun Heo         2010-06-29  859   * wq_worker_sleeping - a worker is going to sleep
e22bee782b Tejun Heo         2010-06-29  860   * @task: task going to sleep
e22bee782b Tejun Heo         2010-06-29  861   * @cpu: CPU in question, must be the current CPU number
^1da177e4c Linus Torvalds    2005-04-16  862   *
e22bee782b Tejun Heo         2010-06-29  863   * This function is called during schedule() when a busy worker is
e22bee782b Tejun Heo         2010-06-29  864   * going to sleep.  Worker on the same cpu can be woken up by
e22bee782b Tejun Heo         2010-06-29  865   * returning pointer to its task.
^1da177e4c Linus Torvalds    2005-04-16  866   *
e22bee782b Tejun Heo         2010-06-29  867   * CONTEXT:
e22bee782b Tejun Heo         2010-06-29  868   * spin_lock_irq(rq->lock)
^1da177e4c Linus Torvalds    2005-04-16  869   *
d185af300f Yacine Belkadi    2013-07-31  870   * Return:
e22bee782b Tejun Heo         2010-06-29  871   * Worker task on @cpu to wake up, %NULL if none.
^1da177e4c Linus Torvalds    2005-04-16  872   */
479b9d020d Alexander Gordeev 2016-02-28  873  struct task_struct *wq_worker_sleeping(struct task_struct *task)
^1da177e4c Linus Torvalds    2005-04-16 @874  {
e22bee782b Tejun Heo         2010-06-29  875  	struct worker *worker = kthread_data(task), *to_wakeup = NULL;
111c225a5f Tejun Heo         2013-01-17  876  	struct worker_pool *pool;
f293ea9200 Oleg Nesterov     2007-05-09  877  
111c225a5f Tejun Heo         2013-01-17  878  	/*
111c225a5f Tejun Heo         2013-01-17  879  	 * Rescuers, which may not have all the fields set up like normal
111c225a5f Tejun Heo         2013-01-17  880  	 * workers, also reach here, let's not access anything before
111c225a5f Tejun Heo         2013-01-17  881  	 * checking NOT_RUNNING.
111c225a5f Tejun Heo         2013-01-17  882  	 */

:::::: The code at line 874 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

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