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authorPaul E. McKenney <paul.mckenney@linaro.org>2011-02-23 11:10:52 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-05-05 23:16:57 -0700
commitf0a07aeaf8935b7e9ef8032ce6546169f143951c (patch)
tree31c6ee98ebb7e3040ad036415702eb23ff929e01 /kernel/rcutree.c
parent108aae22339f445c134aeb48eca25df1014ab08d (diff)
rcu: Switch to this_cpu() primitives
This removes a couple of lines from invoke_rcu_cpu_kthread(), improving readability. Reported-by: Christoph Lameter <cl@linux.com> Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 575d6414763e..27304bc15eca 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1480,18 +1480,14 @@ static void rcu_process_callbacks(void)
static void invoke_rcu_cpu_kthread(void)
{
unsigned long flags;
- wait_queue_head_t *q;
- int cpu;
local_irq_save(flags);
- cpu = smp_processor_id();
- per_cpu(rcu_cpu_has_work, cpu) = 1;
- if (per_cpu(rcu_cpu_kthread_task, cpu) == NULL) {
+ __this_cpu_write(rcu_cpu_has_work, 1);
+ if (__this_cpu_read(rcu_cpu_kthread_task) == NULL) {
local_irq_restore(flags);
return;
}
- q = &per_cpu(rcu_cpu_wq, cpu);
- wake_up(q);
+ wake_up(&__get_cpu_var(rcu_cpu_wq));
local_irq_restore(flags);
}