diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 98921258d768..13eee4855fc0 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6158,6 +6158,7 @@ static int init_rootdomain(struct root_domain *rd)
        rd->rto_cpu = -1;
        raw_spin_lock_init(&rd->rto_lock);
        init_irq_work(&rd->rto_push_work, rto_push_irq_work_func);
+       rd->rto_push_work.flags |= IRQ_WORK_HARD_IRQ;
 #endif

        init_dl_bw(&rd->dl_bw);