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Date:   Tue, 7 May 2019 17:30:15 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     Linux MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-ia64@...r.kernel.org,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        Linux-sh <linux-sh@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 8/8] mm/memory_hotplug: Remove "zone" parameter from sparse_remove_one_section

On Tue, May 7, 2019 at 11:39 AM David Hildenbrand <david@...hat.com> wrote:
>
> Unused, and memory unplug path should never care about zones. This is
> the job of memory offlining. ZONE_DEVICE might require special care -
> the caller of arch_remove_memory() should handle this.

The ZONE_DEVICE usage does not require special care so you can drop
that comment. The only place it's used in the subsection patches is to
lookup the node-id, but it turns out that the resulting node-id is
then never used.

With the ZONE_DEVICE mention dropped out of changelog you can add:

Reviewed-by: Dan Williams <dan.j.williams@...el.com>

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