Re: [PATCH] mm/sparsemem: Cleanup 'section number' data types

[Matthew Wilcox]

On Thu, Jun 20, 2019 at 05:06:46PM -0700, Dan Williams wrote:
> David points out that there is a mixture of 'int' and 'unsigned long'
> usage for section number data types. Update the memory hotplug path to
> use 'unsigned long' consistently for section numbers.

... because we're seriously considering the possibility that we'll need
more than 4 billion sections?