3 files changed, 20 insertions, 4 deletions

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a2841904f2d5..09bde2ab2a0a 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1809,6 +1809,20 @@ int wake_up_state(struct task_struct *p, unsigned int state)
 }
 
 /*
+ * This function clears the sched_dl_entity static params.
+ */
+void __dl_clear_params(struct task_struct *p)
+{
+        struct sched_dl_entity *dl_se = &p->dl;
+
+        dl_se->dl_runtime = 0;
+        dl_se->dl_deadline = 0;
+        dl_se->dl_period = 0;
+        dl_se->flags = 0;
+        dl_se->dl_bw = 0;
+}
+
+/*
  * Perform scheduler related setup for a newly forked process p.
  * p is forked by current.
  *
@@ -1832,10 +1846,7 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
 
         RB_CLEAR_NODE(&p->dl.rb_node);
         hrtimer_init(&p->dl.dl_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-        p->dl.dl_runtime = p->dl.runtime = 0;
-        p->dl.dl_deadline = p->dl.deadline = 0;
-        p->dl.dl_period = 0;
-        p->dl.flags = 0;
+        __dl_clear_params(p);
 
         INIT_LIST_HEAD(&p->rt.run_list);
 
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index aaa5abbff2f1..efb94124420d 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1565,6 +1565,8 @@ static void switched_from_dl(struct rq *rq, struct task_struct *p)
         if (hrtimer_active(&p->dl.dl_timer) && !dl_policy(p->policy))
                 hrtimer_try_to_cancel(&p->dl.dl_timer);
 
+        __dl_clear_params(p);
+
 #ifdef CONFIG_SMP
         /*
          * Since this might be the only -deadline task on the rq,
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 1bc6aad1391a..76f3a38a401c 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -130,6 +130,9 @@ struct rt_bandwidth {
         u64                     rt_runtime;
         struct hrtimer          rt_period_timer;
 };
+
+void __dl_clear_params(struct task_struct *p);
+
 /*
  * To keep the bandwidth of -deadline tasks and groups under control
  * we need some place where: