linux-kernel - [PATCH rcu 03/10] rcu: Remove unused rcu

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Message-Id: <20220204232406.814-3-paulmck@kernel.org>
Date:   Fri,  4 Feb 2022 15:23:59 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com,
        rostedt@...dmis.org, Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH rcu 03/10] rcu: Remove unused rcu_state.boost

From: Neeraj Upadhyay <quic_neeraju@...cinc.com>

Signed-off-by: Neeraj Upadhyay <quic_neeraju@...cinc.com>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/rcu/tree.h        | 5 ++---
 kernel/rcu/tree_plugin.h | 2 --
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 24dd4b0d805f1..e9990945483f1 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -304,9 +304,8 @@ struct rcu_state {
 
 	/* The following fields are guarded by the root rcu_node's lock. */
 
-	u8	boost ____cacheline_internodealigned_in_smp;
-						/* Subject to priority boost. */
-	unsigned long gp_seq;			/* Grace-period sequence #. */
+	unsigned long gp_seq ____cacheline_internodealigned_in_smp;
+						/* Grace-period sequence #. */
 	unsigned long gp_max;			/* Maximum GP duration in */
 						/*  jiffies. */
 	struct task_struct *gp_kthread;		/* Task for grace periods. */
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index c5b45c2f68a15..109429e70a642 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1175,8 +1175,6 @@ static void rcu_spawn_one_boost_kthread(struct rcu_node *rnp)
 	if (rnp->boost_kthread_task || !rcu_scheduler_fully_active)
 		return;
 
-	rcu_state.boost = 1;
-
 	t = kthread_create(rcu_boost_kthread, (void *)rnp,
 			   "rcub/%d", rnp_index);
 	if (WARN_ON_ONCE(IS_ERR(t)))
-- 
2.31.1.189.g2e36527f23