linux-kernel - Re: [PATCH tip/core/rcu 09/18] rcu: Switch synchronize_sched

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Message-ID: <20151007141807.GD3604@twins.programming.kicks-ass.net>
Date:	Wed, 7 Oct 2015 16:18:07 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
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, rostedt@...dmis.org,
	dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com,
	fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com
Subject: Re: [PATCH tip/core/rcu 09/18] rcu: Switch
 synchronize_sched_expedited() to IPI

On Tue, Oct 06, 2015 at 09:29:28AM -0700, Paul E. McKenney wrote:

> @@ -161,6 +161,8 @@ static void rcu_cleanup_dead_rnp(struct rcu_node *rnp_leaf);
>  static void rcu_boost_kthread_setaffinity(struct rcu_node *rnp, int outgoingcpu);
>  static void invoke_rcu_core(void);
>  static void invoke_rcu_callbacks(struct rcu_state *rsp, struct rcu_data *rdp);
> +static void __maybe_unused rcu_report_exp_rdp(struct rcu_state *rsp,
> +					      struct rcu_data *rdp, bool wake);
>  

Do we really need that on a declaration? I though only unused
definitions required it.
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