[CI 6/8] workqueue: Add ordered workqueue

[Matthew Brost <matthew.brost@intel.com>]

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 include/linux/workqueue.h | 1 +
 kernel/workqueue.c        | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index dabc351cc127..e03296bb1814 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -468,6 +468,7 @@ extern struct workqueue_struct *system_power_efficient_wq;
 extern struct workqueue_struct *system_freezable_power_efficient_wq;
 extern struct workqueue_struct *system_bh_wq;
 extern struct workqueue_struct *system_bh_highpri_wq;
+extern struct workqueue_struct *system_ordered_wq;
 
 void workqueue_softirq_action(bool highpri);
 void workqueue_softirq_dead(unsigned int cpu);
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 45320e27a16c..4d14d5e5fd38 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -527,6 +527,8 @@ struct workqueue_struct *system_bh_wq;
 EXPORT_SYMBOL_GPL(system_bh_wq);
 struct workqueue_struct *system_bh_highpri_wq;
 EXPORT_SYMBOL_GPL(system_bh_highpri_wq);
+struct workqueue_struct *system_ordered_wq __ro_after_init;
+EXPORT_SYMBOL(system_ordered_wq);
 
 static int worker_thread(void *__worker);
 static void workqueue_sysfs_unregister(struct workqueue_struct *wq);
@@ -7844,11 +7846,14 @@ void __init workqueue_init_early(void)
 	system_bh_wq = alloc_workqueue("events_bh", WQ_BH | WQ_PERCPU, 0);
 	system_bh_highpri_wq = alloc_workqueue("events_bh_highpri",
 					       WQ_BH | WQ_HIGHPRI | WQ_PERCPU, 0);
+	system_ordered_wq = alloc_ordered_workqueue("ordered_events",
+						    WQ_MEM_RECLAIM);
 	BUG_ON(!system_wq || !system_percpu_wq|| !system_highpri_wq || !system_long_wq ||
 	       !system_unbound_wq || !system_freezable_wq || !system_dfl_wq ||
 	       !system_power_efficient_wq ||
 	       !system_freezable_power_efficient_wq ||
-	       !system_bh_wq || !system_bh_highpri_wq);
+	       !system_bh_wq || !system_bh_highpri_wq ||
+	       !system_ordered_wq);
 }
 
 static void __init wq_cpu_intensive_thresh_init(void)
-- 
2.34.1