Commit 5a43b88e authored Dec 24, 2014 by Lai Jiangshan Committed by Paul E. McKenney Jan 06, 2015

rcu: Remove "select IRQ_WORK" from config TREE_RCU



The 48a7639c ("rcu: Make callers awaken grace-period kthread")
removed the irq_work_queue(), so the TREE_RCU doesn't need
irq work any more.  This commit therefore updates RCU's Kconfig and

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

parent 41050a00

init/Kconfig

+0 −2

Original line number	Original line	Diff line number	Diff line
	@@ -470,7 +470,6 @@ choice
	config TREE_RCU		config TREE_RCU
	bool "Tree-based hierarchical RCU"		bool "Tree-based hierarchical RCU"
	depends on !PREEMPT && SMP		depends on !PREEMPT && SMP
	select IRQ_WORK
	help		help
	This option selects the RCU implementation that is		This option selects the RCU implementation that is
	designed for very large SMP system with hundreds or		designed for very large SMP system with hundreds or
	@@ -480,7 +479,6 @@ config TREE_RCU
	config PREEMPT_RCU		config PREEMPT_RCU
	bool "Preemptible tree-based hierarchical RCU"		bool "Preemptible tree-based hierarchical RCU"
	depends on PREEMPT		depends on PREEMPT
	select IRQ_WORK
	help		help
	This option selects the RCU implementation that is		This option selects the RCU implementation that is
	designed for very large SMP systems with hundreds or		designed for very large SMP systems with hundreds or

kernel/rcu/tree.h

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -27,7 +27,6 @@
	#include <linux/threads.h>		#include <linux/threads.h>
	#include <linux/cpumask.h>		#include <linux/cpumask.h>
	#include <linux/seqlock.h>		#include <linux/seqlock.h>
	#include <linux/irq_work.h>

	/*		/*
	* Define shape of hierarchy based on NR_CPUS, CONFIG_RCU_FANOUT, and		* Define shape of hierarchy based on NR_CPUS, CONFIG_RCU_FANOUT, and