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Date:   Mon, 22 Apr 2019 21:54:14 +0200
From:   Christoph Hellwig <>
To:     Alexandre Ghiti <>
Cc:     Andrew Morton <>,
        Christoph Hellwig <>,
        Russell King <>,
        Catalin Marinas <>,
        Will Deacon <>,
        Ralf Baechle <>,
        Paul Burton <>,
        James Hogan <>,
        Palmer Dabbelt <>,
        Albert Ou <>,
        Alexander Viro <>,
        Luis Chamberlain <>,
        Kees Cook <>,,,,,,,
        Christoph Hellwig <>
Subject: Re: [PATCH v3 04/11] arm64, mm: Move generic mmap layout functions
 to mm

On Wed, Apr 17, 2019 at 01:22:40AM -0400, Alexandre Ghiti wrote:
> arm64 handles top-down mmap layout in a way that can be easily reused
> by other architectures, so make it available in mm.
> It then introduces a new config ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
> that can be set by other architectures to benefit from those functions.
> Note that this new config depends on MMU being enabled, if selected
> without MMU support, a warning will be thrown.
> Suggested-by: Christoph Hellwig <>
> Signed-off-by: Alexandre Ghiti <>

Looks good,

Reviewed-by: Christoph Hellwig <>

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