static void xen_vcpu_notify_restore(void *data)
{
/* Boot processor notified via generic timekeeping_resume() */
if (smp_processor_id() == 0)
return;
tick_resume_local();
}
/**
* tick_unfreeze - Resume the local tick and (possibly) timekeeping.
*
* Check if this is the first CPU executing the function and if so, resume
* timekeeping. Otherwise resume the local tick.
*
* Call with interrupts disabled. Must be balanced with %tick_freeze().
* Interrupts must not be enabled after the preceding %tick_freeze().
*/
void tick_unfreeze(void)
{
raw_spin_lock(&tick_freeze_lock);
if (tick_freeze_depth == num_online_cpus()) {
timekeeping_resume();
trace_suspend_resume(TPS("timekeeping_freeze"),
smp_processor_id(), false);
} else {
tick_resume_local();
}
tick_freeze_depth--;
raw_spin_unlock(&tick_freeze_lock);
}
/**
* tick_resume - Resume the tick and the broadcast device
*
* Called from syscore_resume() via timekeeping_resume with only one
* CPU online and interrupts disabled.
*
* No locks required. Nothing can change the per cpu device.
*/
void tick_resume(void)
{
tick_resume_broadcast();
tick_resume_local();
}