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References: <20181109203921.178363-1-brho@google.com> <20181114215155.259978-1-brho@google.com>
 <20181114215155.259978-2-brho@google.com>
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From:   Dan Williams <dan.j.williams@intel.com>
Date:   Mon, 26 Nov 2018 10:32:04 -0800
Message-ID: <CAPcyv4gY0qn-y6=EgmkhdHCozp4cLcutg26WC0vFyasv-etb-A@mail.gmail.com>
Subject: Re: [PATCH v2 1/3] mm: make dev_pagemap_mapping_shift() externally visible
To:     Barret Rhoden <brho@google.com>
Cc:     Dave Jiang <dave.jiang@intel.com>, zwisler@kernel.org,
        Vishal L Verma <vishal.l.verma@intel.com>,
        Paolo Bonzini <pbonzini@redhat.com>, rkrcmar@redhat.com,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
        linux-nvdimm <linux-nvdimm@lists.01.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>, X86 ML <x86@kernel.org>,
        KVM list <kvm@vger.kernel.org>,
        "Zhang, Yu C" <yu.c.zhang@intel.com>,
        "Zhang, Yi Z" <yi.z.zhang@intel.com>,
        Linux MM <linux-mm@kvack.org>,
        David Hildenbrand <david@redhat.com>
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On Wed, Nov 14, 2018 at 1:53 PM Barret Rhoden <brho@google.com> wrote:
>
> KVM has a use case for determining the size of a dax mapping.  The KVM
> code has easy access to the address and the mm; hence the change in
> parameters.
>
> Signed-off-by: Barret Rhoden <brho@google.com>
> Reviewed-by: David Hildenbrand <david@redhat.com>

Acked-by: Dan Williams <dan.j.williams@intel.com>