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rcu: Switch to this_cpu() primitives

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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>
This commit is contained in:
Paul E. McKenney 2011-02-23 11:10:52 -08:00 • committed by Paul E. McKenney
parent 108aae2233
commit f0a07aeaf8
1 changed files with 3 additions and 7 deletions
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10
kernel/rcutree.c
View file

@ -1480,18 +1480,14 @@ static void rcu_process_callbacks(void)
static void invoke_rcu_cpu_kthread(void) static void invoke_rcu_cpu_kthread(void)
{ {
unsigned long flags; unsigned long flags;
wait_queue_head_t *q;
int cpu;
local_irq_save(flags); local_irq_save(flags);
cpu = smp_processor_id(); __this_cpu_write(rcu_cpu_has_work, 1);
per_cpu(rcu_cpu_has_work, cpu) = 1; if (__this_cpu_read(rcu_cpu_kthread_task) == NULL) {
if (per_cpu(rcu_cpu_kthread_task, cpu) == NULL) {
local_irq_restore(flags); local_irq_restore(flags);
return; return;
} }
q = &per_cpu(rcu_cpu_wq, cpu); wake_up(&__get_cpu_var(rcu_cpu_wq));
wake_up(q);
local_irq_restore(flags); local_irq_restore(flags);
} }