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rcu: Remove "select IRQ_WORK" from config TREE_RCU

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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
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@ -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

1
kernel/rcu/tree.h
View file

@ -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