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Date:   Sat, 2 Mar 2019 00:48:51 +0300
From:   "Kirill A. Shutemov" <kirill@shutemov.name>
To:     Steven Price <steven.price@arm.com>
Cc:     linux-mm@kvack.org, Andy Lutomirski <luto@kernel.org>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
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        Dave Hansen <dave.hansen@linux.intel.com>,
        Ingo Molnar <mingo@redhat.com>,
        James Morse <james.morse@arm.com>,
        =?utf-8?B?SsOpcsO0bWU=?= Glisse <jglisse@redhat.com>,
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        Thomas Gleixner <tglx@linutronix.de>,
        Will Deacon <will.deacon@arm.com>, x86@kernel.org,
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        Mark Rutland <Mark.Rutland@arm.com>,
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        Mark Salter <msalter@redhat.com>,
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        linux-c6x-dev@linux-c6x.org
Subject: Re: [PATCH v3 05/34] c6x: mm: Add p?d_large() definitions
Message-ID: <20190301214851.ucems2icwt64iabx@kshutemo-mobl1>
References: <20190227170608.27963-1-steven.price@arm.com>
 <20190227170608.27963-6-steven.price@arm.com>
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On Wed, Feb 27, 2019 at 05:05:39PM +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.
> 
> For c6x there's no MMU so there's never a large page, so just add stubs.

Other option would be to provide the stubs via generic headers form !MMU.

-- 
 Kirill A. Shutemov