[PATCH v2] powerpc: don't enable cpu hotplug on mpic-based pseries

[Paul Mackerras]

Olof Johansson writes:

> Don't allow cpu hotplug on systems lacking XICS interrupt controller,
> since current code is hardcoded for it.
...
> +	for (np = NULL; (np = of_find_node_by_name(np,
> +						   "interrupt-controller"));) {

Looks like for_each_node_by_name would be nicer here.

If you agree, I'll hand-edit your patch to do that and apply it.  Of
course, ultimately we should implement the necessary mpic bits to
support cpu hotplug.

Paul.