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rcu: Select IRQ_WORK from TREE_PREEMPT_RCU

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TREE_RCU and TREE_PREEMPT_RCU both cause kernel/rcutree.c to be built,
but only TREE_RCU selects IRQ_WORK, which can result in an undefined
reference to irq_work_queue for some (random) configs:

kernel/built-in.o In function `rcu_start_gp_advanced':
kernel/rcutree.c:1564: undefined reference to `irq_work_queue'

Select IRQ_WORK from TREE_PREEMPT_RCU too to fix this.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
James Hogan 2013-07-25 15:34:25 +01:00 committed by Paul E. McKenney
parent c34ac00cae
commit 5361471437
1 changed files with 1 additions and 0 deletions
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init/Kconfig
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@ -470,6 +470,7 @@ config TREE_RCU
config TREE_PREEMPT_RCU config TREE_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