[PATCH 1/2] xen/events: replace use of system_wq with system_percpu_wq

[Marco Crivellari <marco.crivellari@xxxxxxxx>]

Currently if a user enqueues a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.

This lack of consistency cannot be addressed without refactoring the API.

This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue flag in:

commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

Switch to using system_percpu_wq because system_wq is going away as part of
a workqueue restructuring.

Suggested-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Marco Crivellari <marco.crivellari@xxxxxxxx>
---
 drivers/xen/events/events_base.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 9478fae014e5..663df17776fd 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -581,7 +581,7 @@ static void lateeoi_list_add(struct irq_info *info)
                                        eoi_list);
        if (!elem || info->eoi_time < elem->eoi_time) {
                list_add(&info->eoi_list, &eoi->eoi_list);
-               mod_delayed_work_on(info->eoi_cpu, system_wq,
+               mod_delayed_work_on(info->eoi_cpu, system_percpu_wq,
                                    &eoi->delayed, delay);
        } else {
                list_for_each_entry_reverse(elem, &eoi->eoi_list, eoi_list) {
@@ -666,7 +666,7 @@ static void xen_irq_lateeoi_worker(struct work_struct *work)
                        break;
 
                if (now < info->eoi_time) {
-                       mod_delayed_work_on(info->eoi_cpu, system_wq,
+                       mod_delayed_work_on(info->eoi_cpu, system_percpu_wq,
                                            &eoi->delayed,
                                            info->eoi_time - now);
                        break;
@@ -782,7 +782,7 @@ static void xen_free_irq(struct irq_info *info)
 
        WARN_ON(info->refcnt > 0);
 
-       queue_rcu_work(system_wq, &info->rwork);
+       queue_rcu_work(system_percpu_wq, &info->rwork);
 }
 
 /* Not called for lateeoi events. */
-- 
2.51.1