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Commit 1914aab5 authored Dec 26, 2015 by Chen Gang Committed by Paul E. McKenney Feb 23, 2016

rcu: Remove useless rcu_data_p when !PREEMPT_RCU



The related warning from gcc 6.0:

  In file included from kernel/rcu/tree.c:4630:0:
  kernel/rcu/tree_plugin.h:810:40: warning: ‘rcu_data_p’ defined but not used [-Wunused-const-variable]
   static struct rcu_data __percpu *const rcu_data_p = &rcu_sched_data;
                                          ^~~~~~~~~~

Also remove always redundant rcu_data_p in tree.c.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

parent aa5a8988

kernel/rcu/tree.c

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -108,7 +108,6 @@ RCU_STATE_INITIALIZER(rcu_sched, 's', call_rcu_sched);
	RCU_STATE_INITIALIZER(rcu_bh, 'b', call_rcu_bh);		RCU_STATE_INITIALIZER(rcu_bh, 'b', call_rcu_bh);

	static struct rcu_state *const rcu_state_p;		static struct rcu_state *const rcu_state_p;
	static struct rcu_data __percpu *const rcu_data_p;
	LIST_HEAD(rcu_struct_flavors);		LIST_HEAD(rcu_struct_flavors);

	/* Dump rcu_node combining tree at boot to verify correct setup. */		/* Dump rcu_node combining tree at boot to verify correct setup. */

kernel/rcu/tree_plugin.h

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -807,7 +807,6 @@ void exit_rcu(void)
	#else /* #ifdef CONFIG_PREEMPT_RCU */		#else /* #ifdef CONFIG_PREEMPT_RCU */

	static struct rcu_state *const rcu_state_p = &rcu_sched_state;		static struct rcu_state *const rcu_state_p = &rcu_sched_state;
	static struct rcu_data __percpu *const rcu_data_p = &rcu_sched_data;

	/*		/*
	* Tell them what RCU they are running.		* Tell them what RCU they are running.