22  * pools for workqueues which are not bound to any specific CPU - the
287 	struct list_head	list;		/* PR: list of all workqueues */
318 	 * the workqueues list without grabbing wq_pool_mutex.
319 	 * This is used to dump all workqueues from sysrq.
331  * Each pod type describes how CPUs should be grouped for unbound workqueues.
372 static DEFINE_MUTEX(wq_pool_mutex);	/* protects pools and workqueues list */
378 static LIST_HEAD(workqueues);		/* PR: list of all workqueues */
1161  * workqueues as appropriate. To avoid flooding the console, each violating work
1900 	 * This current implementation is specific to unbound workqueues.  in queue_work_node()
2630 	 * workqueues), so hiding them isn't a problem.  in process_one_work()
2732  * exception is work items which belong to workqueues with a rescuer which
2825  * workqueues which have works queued on the pool and let them process
3403 	 * For single threaded workqueues the deadlock happens when the work  in start_flush_work()
3405 	 * workqueues the deadlock happens when the rescuer stalls, blocking  in start_flush_work()
4455 	/* only unbound workqueues can change attributes */  in apply_workqueue_attrs_locked()
4527  * may execute on any CPU. This is similar to how per-cpu workqueues behave on
4659  * Workqueues which may be used during memory reclaim should have a rescuer
4757 	 * wq_pool_mutex protects global freeze state and workqueues list.  in alloc_workqueue()
4758 	 * Grab it, adjust max_active and add the new @wq to workqueues  in alloc_workqueue()
4768 	list_add_tail_rcu(&wq->list, &workqueues);  in alloc_workqueue()
4905 	/* disallow meddling with max_active for ordered workqueues */  in workqueue_set_max_active()
4965  * With the exception of ordered workqueues, all workqueues have per-cpu
5324  * Called from a sysrq handler and prints out all busy workqueues and pools.
5334 	pr_info("Showing busy workqueues and worker pools:\n");  in show_all_workqueues()
5336 	list_for_each_entry_rcu(wq, &workqueues, list)  in show_all_workqueues()
5348  * Called from try_to_freeze_tasks() and prints out all freezable workqueues
5357 	pr_info("Showing freezable workqueues that are still busy:\n");  in show_freezable_workqueues()
5359 	list_for_each_entry_rcu(wq, &workqueues, list) {  in show_freezable_workqueues()
5588 	/* update pod affinity of unbound workqueues */  in workqueue_online_cpu()
5589 	list_for_each_entry(wq, &workqueues, list) {  in workqueue_online_cpu()
5615 	/* update pod affinity of unbound workqueues */  in workqueue_offline_cpu()
5617 	list_for_each_entry(wq, &workqueues, list) {  in workqueue_offline_cpu()
5701  * freeze_workqueues_begin - begin freezing workqueues
5703  * Start freezing workqueues.  After this function returns, all freezable
5704  * workqueues will queue new works to their inactive_works list instead of
5720 	list_for_each_entry(wq, &workqueues, list) {  in freeze_workqueues_begin()
5731  * freeze_workqueues_busy - are freezable workqueues still busy?
5740  * %true if some freezable workqueues are still busy.  %false if freezing
5753 	list_for_each_entry(wq, &workqueues, list) {  in freeze_workqueues_busy()
5777  * thaw_workqueues - thaw workqueues
5779  * Thaw workqueues.  Normal queueing is restored and all collected
5798 	list_for_each_entry(wq, &workqueues, list) {  in thaw_workqueues()
5819 	list_for_each_entry(wq, &workqueues, list) {  in workqueue_apply_unbound_cpumask()
5853  *  The low-level workqueues cpumask is a global cpumask that limits
5854  *  the affinity of all unbound workqueues.  This function check the @cpumask
5855  *  and apply it to all unbound workqueues and updates all pwqs of them.
5913 	list_for_each_entry(wq, &workqueues, list) {  in wq_affn_dfl_set()
5939  * Workqueues with WQ_SYSFS flag set is visible to userland via
5940  * /sys/bus/workqueue/devices/WQ_NAME.  All visible workqueues have the
5946  * Unbound workqueues have the following extra attributes.
6262 	 * workqueues.  in workqueue_sysfs_register()
6561  * up. It sets up all the data structures and system workqueues and allows early
6562  * boot code to create workqueues and queue/cancel work items. Actual work item
6699  * and invoked as soon as kthreads can be created and scheduled. Workqueues have
6716 	 * up. Also, create a rescuer for workqueues that requested it.  in workqueue_init()
6724 	list_for_each_entry(wq, &workqueues, list) {  in workqueue_init()
6810  * workqueue_init_topology - initialize CPU pods for unbound workqueues
6829 	 * Workqueues allocated earlier would have all CPUs sharing the default  in workqueue_init_topology()
6833 	list_for_each_entry(wq, &workqueues, list) {  in workqueue_init_topology()
6844 	pr_warn("WARNING: Flushing system-wide workqueues will be prohibited in near future.\n");  in __warn_flushing_systemwide_wq()