workqueue: add system_freezeable_wq

Add system wide freezeable workqueue.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>

1 files changed, 5 insertions, 1 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 11869faa6819..28f8bd08f0e7 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -249,10 +249,12 @@ struct workqueue_struct *system_wq __read_mostly;
 struct workqueue_struct *system_long_wq __read_mostly;
 struct workqueue_struct *system_nrt_wq __read_mostly;
 struct workqueue_struct *system_unbound_wq __read_mostly;
+struct workqueue_struct *system_freezeable_wq __read_mostly;
 EXPORT_SYMBOL_GPL(system_wq);
 EXPORT_SYMBOL_GPL(system_long_wq);
 EXPORT_SYMBOL_GPL(system_nrt_wq);
 EXPORT_SYMBOL_GPL(system_unbound_wq);
+EXPORT_SYMBOL_GPL(system_freezeable_wq);
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/workqueue.h>
@@ -3764,8 +3766,10 @@ static int __init init_workqueues(void)
         system_nrt_wq = alloc_workqueue("events_nrt", WQ_NON_REENTRANT, 0);
         system_unbound_wq = alloc_workqueue("events_unbound", WQ_UNBOUND,
                                             WQ_UNBOUND_MAX_ACTIVE);
+        system_freezeable_wq = alloc_workqueue("events_freezeable",
+                                               WQ_FREEZEABLE, 0);
         BUG_ON(!system_wq || !system_long_wq || !system_nrt_wq ||
-               !system_unbound_wq);
+               !system_unbound_wq || !system_freezeable_wq);
         return 0;
 }
 early_initcall(init_workqueues);