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path: root/drivers/clocksource/dummy_timer.c
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Diffstat (limited to 'drivers/clocksource/dummy_timer.c')
-rw-r--r--drivers/clocksource/dummy_timer.c36
1 files changed, 6 insertions, 30 deletions
diff --git a/drivers/clocksource/dummy_timer.c b/drivers/clocksource/dummy_timer.c
index 776b6c86d..89f1c2edb 100644
--- a/drivers/clocksource/dummy_timer.c
+++ b/drivers/clocksource/dummy_timer.c
@@ -16,10 +16,9 @@
static DEFINE_PER_CPU(struct clock_event_device, dummy_timer_evt);
-static void dummy_timer_setup(void)
+static int dummy_timer_starting_cpu(unsigned int cpu)
{
- int cpu = smp_processor_id();
- struct clock_event_device *evt = raw_cpu_ptr(&dummy_timer_evt);
+ struct clock_event_device *evt = per_cpu_ptr(&dummy_timer_evt, cpu);
evt->name = "dummy_timer";
evt->features = CLOCK_EVT_FEAT_PERIODIC |
@@ -29,36 +28,13 @@ static void dummy_timer_setup(void)
evt->cpumask = cpumask_of(cpu);
clockevents_register_device(evt);
+ return 0;
}
-static int dummy_timer_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
-{
- if ((action & ~CPU_TASKS_FROZEN) == CPU_STARTING)
- dummy_timer_setup();
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block dummy_timer_cpu_nb = {
- .notifier_call = dummy_timer_cpu_notify,
-};
-
static int __init dummy_timer_register(void)
{
- int err = 0;
-
- cpu_notifier_register_begin();
- err = __register_cpu_notifier(&dummy_timer_cpu_nb);
- if (err)
- goto out;
-
- /* We won't get a call on the boot CPU, so register immediately */
- if (num_possible_cpus() > 1)
- dummy_timer_setup();
-
-out:
- cpu_notifier_register_done();
- return err;
+ return cpuhp_setup_state(CPUHP_AP_DUMMY_TIMER_STARTING,
+ "AP_DUMMY_TIMER_STARTING",
+ dummy_timer_starting_cpu, NULL);
}
early_initcall(dummy_timer_register);