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>
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 575d641..27304bc 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1480,18 +1480,14 @@
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);
}
