> > +#ifdef CONFIG_DEBUG_HOTPLUG_CPU0 > + case PM_RESTORE_PREPARE: > > + /* > > + * When system resumes from hibernation, online CPU0 > because > > + * 1. it's required for resume and > > + * 2. the CPU was online before hibernation > > + */ > > + if (!cpu_online(0)) > > + _debug_hotplug_cpu(0, 1); > > This won't work. CPU hotplug is disabled by cpu_hotplug_pm_callback() > during > PM_HIBERNATION_PREPARE and is enabled back only during > PM_POST_HIBERNATION. > > So calls to cpu_up() or cpu_down() will fail in the meantime.
The code works just fine. You are talking about hibernation/suspend phase. This piece of code is all about restore phase. Of course you can call cpu_up() and cpu_down() during restore phase. So there is no problem here. Thanks. -Fenghua -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
