[PATCH tip/core/rcu 06/12] rcu: Remove unused rcu_cpu_kthread_cpu per-CPU variable

[Paul E. McKenney]

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);
-- 
2.17.1