linux-kernel - [PATCH 05/16] rcu: Add noreturn attribute to boost kthread

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Date:	Wed, 23 Jul 2014 01:09:42 -0400
From:	Pranith Kumar <bobby.prani@...il.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Josh Triplett <josh@...htriplett.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	linux-kernel@...r.kernel.org (open list:READ-COPY UPDATE...)
Subject: [PATCH 05/16] rcu: Add noreturn attribute to boost kthread

rcu_boost_kthread() runs in an infinite loop and does not return. This commit
adds the __noreturn attribute to the function.

Signed-off-by: Pranith Kumar <bobby.prani@...il.com>
---
 kernel/rcu/tree_plugin.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index bac9797..dd53247 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1222,7 +1222,7 @@ static int rcu_boost(struct rcu_node *rnp)
  * Priority-boosting kthread.  One per leaf rcu_node and one for the
  * root rcu_node.
  */
-static int rcu_boost_kthread(void *arg)
+static __noreturn int rcu_boost_kthread(void *arg)
 {
 	struct rcu_node *rnp = (struct rcu_node *)arg;
 	int spincnt = 0;
@@ -1250,7 +1250,6 @@ static int rcu_boost_kthread(void *arg)
 	}
 	/* NOTREACHED */
 	trace_rcu_utilization(TPS("End boost kthread@...reached"));
-	return 0;
 }
 
 /*
-- 
2.0.0.rc2

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