sched: Adjust sched_reset_on_fork when nothing else changes

If the policy and priority remain unchanged a possible modification of
sched_reset_on_fork gets lost in the early exit path.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Cc: stable-rt@vger.kernel.org

1 files changed, 4 insertions, 1 deletions

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 35afc7a..048edc7 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3391,10 +3391,13 @@ recheck:
 	}
 
 	/*
-	 * If not changing anything there's no need to proceed further:
+	 * If not changing anything there's no need to proceed
+	 * further, but store a possible modification of
+	 * reset_on_fork.
 	 */
 	if (unlikely(policy == p->policy && (!rt_policy(policy) ||
 			param->sched_priority == p->rt_priority))) {
+		p->sched_reset_on_fork = reset_on_fork;
 		task_rq_unlock(rq, p, &flags);
 		return 0;
 	}