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[09/14] rcu/sync: Use call_rcu_flush() instead of call_rcu

Message ID 20221019225144.2500095-9-paulmck@kernel.org (mailing list archive)
State Superseded
Commit 438855f961dd8f7b1350a5d533ff7dc7adc79fb5
Headers show
Series Lazy call_rcu() updates for v6.2 | expand

Commit Message

Paul E. McKenney Oct. 19, 2022, 10:51 p.m. UTC 
From: "Joel Fernandes (Google)" <joel@joelfernandes.org>

call_rcu() changes to save power will slow down rcu sync. Use the
call_rcu_flush() API instead which reverts to the old behavior.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 kernel/rcu/sync.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/kernel/rcu/sync.c b/kernel/rcu/sync.c
index 5cefc702158fe..bdce3b5d7f714 100644
--- a/kernel/rcu/sync.c
+++ b/kernel/rcu/sync.c
@@ -44,7 +44,7 @@  static void rcu_sync_func(struct rcu_head *rhp);
 
 static void rcu_sync_call(struct rcu_sync *rsp)
 {
-	call_rcu(&rsp->cb_head, rcu_sync_func);
+	call_rcu_flush(&rsp->cb_head, rcu_sync_func);
 }
 
 /**