sched: don't reschedule a thread if its status is THREAD_STOPPED

sched/core.c

@@ -123,8 +123,16 @@ void __schedule(enum sched_mode mode)
 
 	enum thread_state prev_state = READ_ONCE(prev->tr_state);
 
-	if ((mode == SCHED_IRQ || prev_state == THREAD_READY)
-	    && prev != rq->rq_idle) {
+	bool reschedule = false;
+	if (prev_state == THREAD_READY || mode == SCHED_IRQ) {
+		reschedule = true;
+	}
+
+	if (prev == rq->rq_idle || prev_state == THREAD_STOPPED) {
+		reschedule = false;
+	}
+
+	if (reschedule) {
 		rq_enqueue(rq, prev);
 	}