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From:   Paul Burton <paul.burton@mips.com>
To:     Steven Price <steven.price@arm.com>
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        Andy Lutomirski <luto@kernel.org>,
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        Ralf Baechle <ralf@linux-mips.org>,
        James Hogan <jhogan@kernel.org>,
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Subject: Re: [PATCH v4 03/19] mips: mm: Add p?d_large() definitions
Thread-Topic: [PATCH v4 03/19] mips: mm: Add p?d_large() definitions
Thread-Index: AQHU1DRlehjTtbAKgEapDADsPcSi/KX+10aA
Date:   Wed, 6 Mar 2019 17:12:58 +0000
Message-ID: <20190306171257.5eii6aqpfp6kvszb@pburton-laptop>
References: <20190306155031.4291-1-steven.price@arm.com>
 <20190306155031.4291-4-steven.price@arm.com>
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Hi Steven,

On Wed, Mar 06, 2019 at 03:50:15PM +0000, Steven Price wrote:
> walk_page_range() is going to be allowed to walk page tables other than
> those of user space. For this it needs to know when it has reached a
> 'leaf' entry in the page tables. This information is provided by the
> p?d_large() functions/macros.
>=20
> For mips, we only support large pages on 64 bit.
>=20
> For 64 bit if _PAGE_HUGE is defined we can simply look for it. When not
> defined we can be confident that there are no large pages in existence
> and fall back on the generic implementation (added in a later patch)
> which returns 0.
>=20
> CC: Ralf Baechle <ralf@linux-mips.org>
> CC: Paul Burton <paul.burton@mips.com>
> CC: James Hogan <jhogan@kernel.org>
> CC: linux-mips@vger.kernel.org
> Signed-off-by: Steven Price <steven.price@arm.com>

Acked-by: Paul Burton <paul.burton@mips.com>

Thanks,
    Paul