[PATCH v5] pseries: prevent free CPU ids to be reused on another node

[Nathan Lynch]

Laurent Dufour <ldufour at linux.ibm.com> writes:
> V5:
>  - Rework code structure
>  - Reintroduce the capability to reuse other node's ids.

OK. While I preferred v4, where we would fail an add rather than allow
CPU IDs to appear to "travel" between nodes, this change is a net
improvement.

Reviewed-by: Nathan Lynch <nathanl at linux.ibm.com>