linux-kernel - Re: [PATCH v1 1/4] mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn

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Message-ID: <CAMZfGtVtUZphhNiKEZ2Xj7gTbkG0YaV5oxPRy-Kiw+J_NO9=ag@mail.gmail.com>
Date:   Thu, 15 Jul 2021 17:34:44 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
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        Yoshinori Sato <ysato@...rs.sourceforge.jp>
Subject: Re: [PATCH v1 1/4] mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn_range()

On Mon, Jul 12, 2021 at 8:42 PM David Hildenbrand <david@...hat.com> wrote:
>
> Checkpatch complained on a follow-up patch that we are using "unsigned"
> here, which defaults to "unsigned int" and checkpatch is correct.
>
> Use "unsigned long" instead, just as we do in other places when handling
> PFNs. This can bite us once we have physical addresses in the range of
> multiple TB.
>
> Fixes: e5e689302633 ("mm, memory_hotplug: display allowed zones in the preferred ordering")
> Signed-off-by: David Hildenbrand <david@...hat.com>

Reviewed-by: Muchun Song <songmuchun@...edance.com>