[tip:core/rcu] rcu: Remove unused rcu_cpu_kthread_cpu per-CPU variable

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Commit-ID:  b2c1955b88495c1531b2080ba4fad119c0a03cc1
Gitweb:     https://git.kernel.org/tip/b2c1955b88495c1531b2080ba4fad119c0a03cc1
Author:     Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
AuthorDate: Fri, 30 Nov 2018 19:12:04 -0800
Committer:  Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
CommitDate: Fri, 25 Jan 2019 15:29:56 -0800

rcu: Remove unused rcu_cpu_kthread_cpu per-CPU variable

The rcu_cpu_kthread_cpu used to provide debugfs information, but is no
longer used.  This commit therefore removes it.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
---
 kernel/rcu/tree.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 7ae6774a920e..008c356c7033 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -408,10 +408,6 @@ static const char *tp_rcu_varname __used __tracepoint_string = rcu_name;
 
 int rcu_dynticks_snap(struct rcu_data *rdp);
 
-#ifdef CONFIG_RCU_BOOST
-DECLARE_PER_CPU(int, rcu_cpu_kthread_cpu);
-#endif /* #ifdef CONFIG_RCU_BOOST */
-
 /* Forward declarations for rcutree_plugin.h */
 static void rcu_bootup_announce(void);
 static void rcu_qs(void);



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