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-rw-r--r--kernel/sched/core.c4
-rw-r--r--kernel/sched/deadline.c3
2 files changed, 5 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7fea865a810..656cd70eb57 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4347,7 +4347,9 @@ 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();
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 0de24820287..0dd5e0971a0 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -351,7 +351,8 @@ static void replenish_dl_entity(struct sched_dl_entity *dl_se,
* disrupting the schedulability of the system. Otherwise, we should
* refill the runtime and set the deadline a period in the future,
* because keeping the current (absolute) deadline of the task would
- * result in breaking guarantees promised to other tasks.
+ * result in breaking guarantees promised to other tasks (refer to
+ * Documentation/scheduler/sched-deadline.txt for more informations).
*
* This function returns true if:
*