kernel/workqueue.c:324:40: sparse: sparse: duplicate [noderef]

[kernel test robot <lkp@intel.com>]

:::::: 
:::::: Manual check reason: "low confidence static check warning: kernel/workqueue.c:324:40: sparse: sparse: duplicate [noderef]"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Tejun Heo <tj@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   535a265d7f0dd50d8c3a4f8b4f3a452d56bd160f
commit: 636b927eba5bc633753f8eb80f35e1d5be806e51 workqueue: Make unbound workqueues to use per-cpu pool_workqueues
date:   5 weeks ago
:::::: branch date: 3 hours ago
:::::: commit date: 5 weeks ago
config: i386-randconfig-061-20230909 (https://download.01.org/0day-ci/archive/20230910/202309101431.8jVt4Xbs-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/20230910/202309101431.8jVt4Xbs-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@intel.com>
| Closes: https://lore.kernel.org/r/202309101431.8jVt4Xbs-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/workqueue.c:324:40: sparse: sparse: duplicate [noderef]
>> kernel/workqueue.c:324:40: sparse: sparse: multiple address spaces given: __percpu & __rcu

vim +324 kernel/workqueue.c

226223ab3c4118 Tejun Heo       2013-03-12  279  
^1da177e4c3f41 Linus Torvalds  2005-04-16  280  /*
c5aa87bbf4b23f Tejun Heo       2013-03-13  281   * The externally visible workqueue.  It relays the issued work items to
c5aa87bbf4b23f Tejun Heo       2013-03-13  282   * the appropriate worker_pool through its pool_workqueues.
^1da177e4c3f41 Linus Torvalds  2005-04-16  283   */
^1da177e4c3f41 Linus Torvalds  2005-04-16  284  struct workqueue_struct {
3c25a55daadc7e Lai Jiangshan   2013-03-25  285  	struct list_head	pwqs;		/* WR: all pwqs of this wq */
e2dca7adff8f3f Tejun Heo       2015-03-09  286  	struct list_head	list;		/* PR: list of all workqueues */
73f53c4aa732ec Tejun Heo       2010-06-29  287  
3c25a55daadc7e Lai Jiangshan   2013-03-25  288  	struct mutex		mutex;		/* protects this wq */
3c25a55daadc7e Lai Jiangshan   2013-03-25  289  	int			work_color;	/* WQ: current work color */
3c25a55daadc7e Lai Jiangshan   2013-03-25  290  	int			flush_color;	/* WQ: current flush color */
112202d9098aae Tejun Heo       2013-02-13  291  	atomic_t		nr_pwqs_to_flush; /* flush in progress */
3c25a55daadc7e Lai Jiangshan   2013-03-25  292  	struct wq_flusher	*first_flusher;	/* WQ: first flusher */
3c25a55daadc7e Lai Jiangshan   2013-03-25  293  	struct list_head	flusher_queue;	/* WQ: flush waiters */
3c25a55daadc7e Lai Jiangshan   2013-03-25  294  	struct list_head	flusher_overflow; /* WQ: flush overflow list */
73f53c4aa732ec Tejun Heo       2010-06-29  295  
2e109a2855bf6c Tejun Heo       2013-03-13  296  	struct list_head	maydays;	/* MD: pwqs requesting rescue */
30ae2fc0a75eb5 Tejun Heo       2019-09-20  297  	struct worker		*rescuer;	/* MD: rescue worker */
e22bee782b3b00 Tejun Heo       2010-06-29  298  
87fc741e94cf64 Lai Jiangshan   2013-03-25  299  	int			nr_drainers;	/* WQ: drain in progress */
a357fc03262988 Lai Jiangshan   2013-03-25  300  	int			saved_max_active; /* WQ: saved pwq max_active */
226223ab3c4118 Tejun Heo       2013-03-12  301  
5b95e1af8d17d8 Lai Jiangshan   2015-05-12  302  	struct workqueue_attrs	*unbound_attrs;	/* PW: only for unbound wqs */
5b95e1af8d17d8 Lai Jiangshan   2015-05-12  303  	struct pool_workqueue	*dfl_pwq;	/* PW: only for unbound wqs */
6029a91829ad2b Tejun Heo       2013-04-01  304  
226223ab3c4118 Tejun Heo       2013-03-12  305  #ifdef CONFIG_SYSFS
226223ab3c4118 Tejun Heo       2013-03-12  306  	struct wq_device	*wq_dev;	/* I: for sysfs interface */
226223ab3c4118 Tejun Heo       2013-03-12  307  #endif
4e6045f134784f Johannes Berg   2007-10-18  308  #ifdef CONFIG_LOCKDEP
669de8bda87b92 Bart Van Assche 2019-02-14  309  	char			*lock_name;
669de8bda87b92 Bart Van Assche 2019-02-14  310  	struct lock_class_key	key;
4e6045f134784f Johannes Berg   2007-10-18  311  	struct lockdep_map	lockdep_map;
4e6045f134784f Johannes Berg   2007-10-18  312  #endif
ecf6881ff349ad Tejun Heo       2013-04-01  313  	char			name[WQ_NAME_LEN]; /* I: workqueue name */
2728fd2f098c3c Tejun Heo       2013-04-01  314  
e2dca7adff8f3f Tejun Heo       2015-03-09  315  	/*
24acfb71822566 Thomas Gleixner 2019-03-13  316  	 * Destruction of workqueue_struct is RCU protected to allow walking
24acfb71822566 Thomas Gleixner 2019-03-13  317  	 * the workqueues list without grabbing wq_pool_mutex.
e2dca7adff8f3f Tejun Heo       2015-03-09  318  	 * This is used to dump all workqueues from sysrq.
e2dca7adff8f3f Tejun Heo       2015-03-09  319  	 */
e2dca7adff8f3f Tejun Heo       2015-03-09  320  	struct rcu_head		rcu;
e2dca7adff8f3f Tejun Heo       2015-03-09  321  
2728fd2f098c3c Tejun Heo       2013-04-01  322  	/* hot fields used during command issue, aligned to cacheline */
2728fd2f098c3c Tejun Heo       2013-04-01  323  	unsigned int		flags ____cacheline_aligned; /* WQ: WQ_* flags */
636b927eba5bc6 Tejun Heo       2023-08-07 @324  	struct pool_workqueue __percpu __rcu **cpu_pwq; /* I: per-cpu pwqs */
^1da177e4c3f41 Linus Torvalds  2005-04-16  325  };
^1da177e4c3f41 Linus Torvalds  2005-04-16  326  

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