On Fri, May 16, 2014 at 12:15:05PM +0200, Peter Zijlstra wrote:
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -5126,7 +5126,6 @@ static int sched_cpu_active(struct notif
>  				      unsigned long action, void *hcpu)
>  {
>  	switch (action & ~CPU_TASKS_FROZEN) {
> -	case CPU_STARTING:
>  	case CPU_DOWN_FAILED:
>  		set_cpu_active((long)hcpu, true);
>  		return NOTIFY_OK;

In fact, I dropped this part as it conflicts with another patch I have,
and setting it again isn't a big problem.

  http://lkml.kernel.org/r/1399574859-11714-1-git-send-email-minyard@acm.org