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rcu: Remove "select IRQ_WORK" from config TREE_RCU 

The 48a7639ce8 ("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>
This commit is contained in:
Lai Jiangshan 2014-12-24 17:55:28 +08:00 committed by Paul E. McKenney
parent 41050a0096
commit 5a43b88e98
2 changed files with 0 additions and 3 deletions
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2
init/Kconfig
View File

@ -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

1
kernel/rcu/tree.h
View File

@ -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