linux-kernel - [PATCH] rcu/tree_exp: cleanup initialized but not used rdp

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Date:   Tue, 23 Apr 2019 09:21:55 +0800
From:   Jiang Biao <benbjiang@...cent.com>
To:     <paulmck@...ux.ibm.com>, <josh@...htriplett.org>
CC:     <linux-kernel@...r.kernel.org>, <benbjiang@...cent.com>
Subject: [PATCH] rcu/tree_exp: cleanup initialized but not used rdp

rdp is initialized but never used in synchronize_rcu_expedited(),
just remove it.

Signed-off-by: Jiang Biao <benbjiang@...cent.com>
---
 kernel/rcu/tree_exp.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index 4c2a0189e748..5772612379e4 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -733,7 +733,6 @@ static void sync_sched_exp_online_cleanup(int cpu)
  */
 void synchronize_rcu_expedited(void)
 {
-	struct rcu_data *rdp;
 	struct rcu_exp_work rew;
 	struct rcu_node *rnp;
 	unsigned long s;
@@ -770,7 +769,6 @@ void synchronize_rcu_expedited(void)
 	}
 
 	/* Wait for expedited grace period to complete. */
-	rdp = per_cpu_ptr(&rcu_data, raw_smp_processor_id());
 	rnp = rcu_get_root();
 	wait_event(rnp->exp_wq[rcu_seq_ctr(s) & 0x3],
 		   sync_exp_work_done(s));
-- 
2.17.2 (Apple Git-113)