linux-kernel - [PATCH] rcu: remove "select IRQ_WORK" from config TREE

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Date:	Wed, 24 Dec 2014 17:55:28 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	<linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
CC:	Lai Jiangshan <laijs@...fujitsu.com>,
	Josh Triplett <josh@...htriplett.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	蔡正龙 <zhenglong.cai@...c.com.cn>,
	Bertrand Jacquin <beber@...eeweb.net>,
	"Luis R. Rodriguez" <mcgrof@...e.com>,
	Fabian Frederick <fabf@...net.be>,
	Andy Lutomirski <luto@...capital.net>,
	Pranith Kumar <bobby.prani@...il.com>,
	Peter Foley <pefoley2@...oley.com>,
	Mel Gorman <mgorman@...e.de>,
	Clark Williams <clark.williams@...il.com>
Subject: [PATCH] rcu: remove "select IRQ_WORK" from config TREE_RCU

The 48a7639ce80c ("rcu: Make callers awaken grace-period kthread")
removed the irq_work_queue(), so the TREE_RCU doesn't need
irq work any more.

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
 init/Kconfig      |    2 --
 kernel/rcu/tree.h |    1 -
 2 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 9afb971..39b4313 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -470,7 +470,6 @@ choice
 config TREE_RCU
 	bool "Tree-based hierarchical RCU"
 	depends on !PREEMPT && SMP
-	select IRQ_WORK
 	help
 	  This option selects the RCU implementation that is
 	  designed for very large SMP system with hundreds or
@@ -480,7 +479,6 @@ config TREE_RCU
 config PREEMPT_RCU
 	bool "Preemptible tree-based hierarchical RCU"
 	depends on PREEMPT
-	select IRQ_WORK
 	help
 	  This option selects the RCU implementation that is
 	  designed for very large SMP systems with hundreds or
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 8e7b184..a47a13c 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -27,7 +27,6 @@
 #include <linux/threads.h>
 #include <linux/cpumask.h>
 #include <linux/seqlock.h>
-#include <linux/irq_work.h>
 
 /*
  * Define shape of hierarchy based on NR_CPUS, CONFIG_RCU_FANOUT, and
-- 
1.7.4.4

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