linux-kernel - [PATCH] rcu: Remove reduplicate check of cpu

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Message-ID: <1424855386-8280-1-git-send-email-yaodongdong@huawei.com>
Date:	Wed, 25 Feb 2015 17:09:46 +0800
From:	Yao Dongdong <yaodongdong@...wei.com>
To:	<paulmck@...ux.vnet.ibm.com>, <josh@...htriplett.org>,
	<rostedt@...dmis.org>, <mathieu.desnoyers@...icios.com>,
	<laijs@...fujitsu.com>
CC:	<linux-kernel@...r.kernel.org>, <lizefan@...wei.com>
Subject: [PATCH] rcu: Remove reduplicate check of cpu_online

The calling function invoke_rcu_core will check it.

Signed-off-by: Yao Dongdong <yaodongdong@...wei.com>
---
 kernel/rcu/tree.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 48d640c..e5f9b7e 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2741,7 +2741,7 @@ static void __call_rcu_core(struct rcu_state *rsp, struct rcu_data *rdp,
 	 * If called from an extended quiescent state, invoke the RCU
 	 * core in order to force a re-evaluation of RCU's idleness.
 	 */
-	if (!rcu_is_watching() && cpu_online(smp_processor_id()))
+	if (!rcu_is_watching())
 		invoke_rcu_core();
 
 	/* If interrupts were disabled or CPU offline, don't invoke RCU core. */
-- 
1.7.9.5

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