diff --git a/kernel/cgroup/cpuset-internal.h b/kernel/cgroup/cpuset-internal.h
index f7aaf01f7cd5..140700e5e236 100644
--- a/kernel/cgroup/cpuset-internal.h
+++ b/kernel/cgroup/cpuset-internal.h
@@ -165,7 +165,7 @@ struct cpuset {
 	 * number of SCHED_DEADLINE tasks attached to this cpuset, so that we
 	 * know when to rebuild associated root domain bandwidth information.
 	 */
-	int nr_deadline_tasks;
+	atomic_t nr_deadline_tasks;
 	int nr_migrate_dl_tasks;
 	/* DL bandwidth that needs destination reservation for this attach. */
 	u64 sum_migrate_dl_bw;
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index e53f35e2726f..7c54289edf40 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -222,14 +222,14 @@ void inc_dl_tasks_cs(struct task_struct *p)
 {
 	struct cpuset *cs = task_cs(p);
 
-	cs->nr_deadline_tasks++;
+	atomic_inc(&cs->nr_deadline_tasks);
 }
 
 void dec_dl_tasks_cs(struct task_struct *p)
 {
 	struct cpuset *cs = task_cs(p);
 
-	cs->nr_deadline_tasks--;
+	atomic_dec(&cs->nr_deadline_tasks);
 }
 
 static inline bool is_partition_valid(const struct cpuset *cs)
@@ -918,7 +918,7 @@ static void dl_update_tasks_root_domain(struct cpuset *cs)
 	struct css_task_iter it;
 	struct task_struct *task;
 
-	if (cs->nr_deadline_tasks == 0)
+	if (atomic_read(&cs->nr_deadline_tasks) == 0)
 		return;
 
 	css_task_iter_start(&cs->css, 0, &it);
@@ -3215,8 +3215,8 @@ static void cpuset_attach(struct cgroup_taskset *tset)
 	cs->old_mems_allowed = cpuset_attach_nodemask_to;
 
 	if (cs->nr_migrate_dl_tasks) {
-		cs->nr_deadline_tasks += cs->nr_migrate_dl_tasks;
-		oldcs->nr_deadline_tasks -= cs->nr_migrate_dl_tasks;
+		atomic_add(cs->nr_migrate_dl_tasks, &cs->nr_deadline_tasks);
+		atomic_sub(cs->nr_migrate_dl_tasks, &oldcs->nr_deadline_tasks);
 		reset_migrate_dl_data(cs);
 	}