[PATCH v6] numa: make node_to_cpumask_map() NUMA_NO_NODE aware

[Peter Zijlstra]

On Fri, Oct 11, 2019 at 11:27:54AM +0800, Yunsheng Lin wrote:
> But I failed to see why the above is related to making node_to_cpumask_map()
> NUMA_NO_NODE aware?

Your initial bug is for hns3, which is a PCI device, which really _MUST_
have a node assigned.

It not having one, is a straight up bug. We must not silently accept
NO_NODE there, ever.