Revert "ANDROID: sched/fair: update_max_interval() active_mask dependant"

This reverts commit 75d6951cf8.

CPU Pause causes major merge conflicts with the 5.11 scheduler changes
(migrate-disable specifically), so lets revert Pause temporarily as it
is not needed urgently in android-mainline.

Signed-off-by: Quentin Perret <qperret@google.com>
Change-Id: I05b0288ae67b72f9a4151f41fad1546e4f7ba1f7

kernel/sched/core.c

@@ -6974,8 +6974,6 @@ int sched_cpu_activate(unsigned int cpu)
 	}
 	rq_unlock_irqrestore(rq, &rf);
 
-	update_max_interval();
-
 	return 0;
 }
 
@@ -7010,9 +7008,6 @@ int sched_cpu_deactivate(unsigned int cpu)
 		return ret;
 	}
 	sched_domains_numa_masks_clear(cpu);
-
-	update_max_interval();
-
 	return 0;
 }
 
@@ -7021,6 +7016,7 @@ static void sched_rq_cpu_starting(unsigned int cpu)
 	struct rq *rq = cpu_rq(cpu);
 
 	rq->calc_load_update = calc_load_update;
+	update_max_interval();
 }
 
 int sched_cpu_starting(unsigned int cpu)
@@ -7052,6 +7048,7 @@ int sched_cpu_dying(unsigned int cpu)
 	trace_android_rvh_sched_cpu_dying(cpu);
 
 	calc_load_migrate(rq);
+	update_max_interval();
 	nohz_balance_exit_idle(rq);
 	hrtick_clear(rq);
 	return 0;

kernel/sched/fair.c

@@ -10033,7 +10033,7 @@ static DEFINE_SPINLOCK(balancing);
  */
 void update_max_interval(void)
 {
-	max_load_balance_interval = HZ*num_active_cpus()/10;
+	max_load_balance_interval = HZ*num_online_cpus()/10;
 }
 
 /*