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

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Message-ID: <20190621145805.GN32656@bombadil.infradead.org>
Date:   Fri, 21 Jun 2019 07:58:06 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     akpm@...ux-foundation.org, Michal Hocko <mhocko@...e.com>,
        Oscar Salvador <osalvador@...e.de>,
        David Hildenbrand <david@...hat.com>, linux-mm@...ck.org,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/sparsemem: Cleanup 'section number' data types

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?