sched: core: Disable double lock/unlock balance in move_queued_task()

CONFIG_LOCK_STAT shows warnings in move_queued_task() for releasing a
pinned lock. The warnings are due to the calls to
double_unlock_balance() added to snapshot WALT. Lets disable them if
not building with SCHED_WALT.

Bug: 123720375
Change-Id: I8bff8550c4f79ca535556f6ec626f17ff5fce637
Signed-off-by: Miguel de Dios <migueldedios@google.com>
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>

kernel/sched/core.c

@@ -987,9 +987,14 @@ static struct rq *move_queued_task(struct rq *rq, struct rq_flags *rf,
 
 	p->on_rq = TASK_ON_RQ_MIGRATING;
 	dequeue_task(rq, p, DEQUEUE_NOCLOCK);
+#ifdef CONFIG_SCHED_WALT
 	double_lock_balance(rq, cpu_rq(new_cpu));
 	set_task_cpu(p, new_cpu);
 	double_rq_unlock(cpu_rq(new_cpu), rq);
+#else
+	set_task_cpu(p, new_cpu);
+	rq_unlock(rq, rf);
+#endif
 
 	rq = cpu_rq(new_cpu);