CPU hotplug hits oops in select_idle_sibling()

[Anton Blanchard]

Hi Peter,

> > I updated to mainline as of today and tried CPU hotplug via the
> > ppc64_cpu tool:  
> 
> http://lkml.kernel.org/r/1475922278-3306-1-git-send-email-wanpeng.li@hotmail.com

Thanks, this fixes the issue for me.

Anton