1 files changed, 14 insertions, 11 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 8b718b59b09f..78fa75394011 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2057,14 +2057,14 @@ inline int task_curr(const struct task_struct *p)
 
 static inline void check_class_changed(struct rq *rq, struct task_struct *p,
                                        const struct sched_class *prev_class,
-                                       int oldprio, int running)
+                                       int oldprio)
 {
         if (prev_class != p->sched_class) {
                 if (prev_class->switched_from)
-                        prev_class->switched_from(rq, p, running);
-                p->sched_class->switched_to(rq, p, running);
-        } else
-                p->sched_class->prio_changed(rq, p, oldprio, running);
+                        prev_class->switched_from(rq, p);
+                p->sched_class->switched_to(rq, p);
+        } else if (oldprio != p->prio)
+                p->sched_class->prio_changed(rq, p, oldprio);
 }
 
 static void check_preempt_curr(struct rq *rq, struct task_struct *p, int flags)
@@ -2598,6 +2598,7 @@ static void __sched_fork(struct task_struct *p)
         p->se.sum_exec_runtime          = 0;
         p->se.prev_sum_exec_runtime     = 0;
         p->se.nr_migrations             = 0;
+        p->se.vruntime                  = 0;
 
 #ifdef CONFIG_SCHEDSTATS
         memset(&p->se.statistics, 0, sizeof(p->se.statistics));
@@ -4696,11 +4697,10 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
 
         if (running)
                 p->sched_class->set_curr_task(rq);
-        if (on_rq) {
+        if (on_rq)
                 enqueue_task(rq, p, oldprio < prio ? ENQUEUE_HEAD : 0);
 
-                check_class_changed(rq, p, prev_class, oldprio, running);
-        }
+        check_class_changed(rq, p, prev_class, oldprio);
         task_rq_unlock(rq, &flags);
 }
 
@@ -5028,11 +5028,10 @@ recheck:
 
         if (running)
                 p->sched_class->set_curr_task(rq);
-        if (on_rq) {
+        if (on_rq)
                 activate_task(rq, p, 0);
 
-                check_class_changed(rq, p, prev_class, oldprio, running);
-        }
+        check_class_changed(rq, p, prev_class, oldprio);
         __task_rq_unlock(rq);
         raw_spin_unlock_irqrestore(&p->pi_lock, flags);
 
@@ -8237,6 +8236,8 @@ EXPORT_SYMBOL(__might_sleep);
 #ifdef CONFIG_MAGIC_SYSRQ
 static void normalize_task(struct rq *rq, struct task_struct *p)
 {
+        const struct sched_class *prev_class = p->sched_class;
+        int old_prio = p->prio;
         int on_rq;
 
         on_rq = p->se.on_rq;
@@ -8247,6 +8248,8 @@ static void normalize_task(struct rq *rq, struct task_struct *p)
                 activate_task(rq, p, 0);
                 resched_task(rq->curr);
         }
+
+        check_class_changed(rq, p, prev_class, old_prio);
 }
 
 void normalize_rt_tasks(void)