Merge "sched: Remove synchronize rcu/sched calls from _cpu_down"

1 files changed, 0 insertions, 15 deletions

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 37731292f8a1..1cfd381642da 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -365,21 +365,6 @@ static int _cpu_down(unsigned int cpu, int tasks_frozen)
 		goto out_release;
 	}
 
-	/*
-	 * By now we've cleared cpu_active_mask, wait for all preempt-disabled
-	 * and RCU users of this state to go away such that all new such users
-	 * will observe it.
-	 *
-	 * For CONFIG_PREEMPT we have preemptible RCU and its sync_rcu() might
-	 * not imply sync_sched(), so wait for both.
-	 *
-	 * Do sync before park smpboot threads to take care the rcu boost case.
-	 */
-	if (IS_ENABLED(CONFIG_PREEMPT))
-		synchronize_rcu_mult(call_rcu, call_rcu_sched);
-	else
-		synchronize_rcu();
-
 	smpboot_park_threads(cpu);
 
 	/*