linux-kernel - [PATCH tip/core/rcu 11/18] rcu/nocb: Remove obsolete nocb_head and nocb

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Message-Id: <20190801230810.21570-11-paulmck@linux.ibm.com>
Date:   Thu,  1 Aug 2019 16:08:03 -0700
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, mingo@...nel.org,
        jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        "Paul E. McKenney" <paulmck@...ux.ibm.com>
Subject: [PATCH tip/core/rcu 11/18] rcu/nocb: Remove obsolete nocb_head and nocb_tail fields

Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
---
 kernel/rcu/tree.h        | 3 ---
 kernel/rcu/tree_plugin.h | 1 -
 2 files changed, 4 deletions(-)

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 529eec2aa74d..74e3a4ab8095 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -194,8 +194,6 @@ struct rcu_data {
 
 	/* 5) Callback offloading. */
 #ifdef CONFIG_RCU_NOCB_CPU
-	struct rcu_head *nocb_head;	/* CBs waiting for kthread. */
-	struct rcu_head **nocb_tail;
 	atomic_long_t nocb_q_count;	/* # CBs waiting for nocb */
 	atomic_long_t nocb_q_count_lazy; /*  invocation (all stages). */
 	struct rcu_head *nocb_cb_head;	/* CBs ready to invoke. */
@@ -211,7 +209,6 @@ struct rcu_data {
 					/* CBs waiting for GP. */
 	struct rcu_head **nocb_gp_tail;
 	bool nocb_gp_sleep;		/* Is the nocb GP thread asleep? */
-	bool nocb_gp_forced;		/* Forced nocb GP thread wakeup? */
 	struct swait_queue_head nocb_gp_wq; /* For nocb kthreads to sleep on. */
 	bool nocb_cb_sleep;		/* Is the nocb CB thread asleep? */
 	struct task_struct *nocb_cb_kthread;
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index feffc46cccb0..838e0caaf53a 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1911,7 +1911,6 @@ void __init rcu_init_nohz(void)
 /* Initialize per-rcu_data variables for no-CBs CPUs. */
 static void __init rcu_boot_init_nocb_percpu_data(struct rcu_data *rdp)
 {
-	rdp->nocb_tail = &rdp->nocb_head;
 	init_swait_queue_head(&rdp->nocb_cb_wq);
 	init_swait_queue_head(&rdp->nocb_gp_wq);
 	rdp->nocb_cb_tail = &rdp->nocb_cb_head;
-- 
2.17.1