1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 36c951b7eef8..81343d6bd9cb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4324,7 +4324,9 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
                 goto out_unlock;
 
         rq = task_rq_lock(p, &flags);
-        time_slice = p->sched_class->get_rr_interval(rq, p);
+        time_slice = 0;
+        if (p->sched_class->get_rr_interval)
+                time_slice = p->sched_class->get_rr_interval(rq, p);
         task_rq_unlock(rq, p, &flags);
 
         rcu_read_unlock();