[PATCH 0/2 v2] cpu/hotplug: Allow the CPU in CPU_UP_PREPARE state to be brought up again.

[Sebastian Andrzej Siewior]

This is a repost of the previous patch (#2) and adding Boris
(Ostrovsky)'s suggestion regarding the XEN bits.
The previous post can be found at
   https://lore.kernel.org/all/20211122154714.xaoxok3fpk5bg...@linutronix.de/

Sebastian