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xen/events: replace use of system_wq with system_percpu_wq

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@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <20251106155831.306248-2-marco.crivellari@suse.com>

authored by

Marco Crivellari and committed by
Juergen Gross 842df741 0f61b186

+3 -3
+3 -3
drivers/xen/events/events_base.c
··· 581 581 eoi_list); 582 582 if (!elem || info->eoi_time < elem->eoi_time) { 583 583 list_add(&info->eoi_list, &eoi->eoi_list); 584 - mod_delayed_work_on(info->eoi_cpu, system_wq, 584 + mod_delayed_work_on(info->eoi_cpu, system_percpu_wq, 585 585 &eoi->delayed, delay); 586 586 } else { 587 587 list_for_each_entry_reverse(elem, &eoi->eoi_list, eoi_list) { ··· 666 666 break; 667 667 668 668 if (now < info->eoi_time) { 669 - mod_delayed_work_on(info->eoi_cpu, system_wq, 669 + mod_delayed_work_on(info->eoi_cpu, system_percpu_wq, 670 670 &eoi->delayed, 671 671 info->eoi_time - now); 672 672 break; ··· 782 782 783 783 WARN_ON(info->refcnt > 0); 784 784 785 - queue_rcu_work(system_wq, &info->rwork); 785 + queue_rcu_work(system_percpu_wq, &info->rwork); 786 786 } 787 787 788 788 /* Not called for lateeoi events. */