linux-kernel - Re: [PATCH v11 02/22] arc: mm: Add p?d

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Message-ID: <6c09d4df-ed4a-21ed-6f39-74b745650430@gmail.com>
Date:   Tue, 8 Oct 2019 13:19:28 -0700
From:   Vineet Gupta <vineetg76@...il.com>
To:     Steven Price <steven.price@....com>, linux-mm@...ck.org
Cc:     Andy Lutomirski <luto@...nel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        James Morse <james.morse@....com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mark Rutland <Mark.Rutland@....com>,
        "Liang, Kan" <kan.liang@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v11 02/22] arc: mm: Add p?d_leaf() definitions

On 10/7/19 8:38 AM, 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 will be provided by the
> p?d_leaf() functions/macros.
> 
> For arc, we only have two levels, so only pmd_leaf() is needed.
> 
> CC: Vineet Gupta <vgupta@...opsys.com>
> CC: linux-snps-arc@...ts.infradead.org
> Signed-off-by: Steven Price <steven.price@....com>

Acked-by: Vineet Gupta <vgupta@...opsys.com>

-Vineet