linux-kernel - Re: [PATCH v3 04/11] arm64, mm: Move generic mmap layout functions to mm

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Date:   Mon, 22 Apr 2019 21:54:14 +0200
From:   Christoph Hellwig <hch@....de>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mips@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        Christoph Hellwig <hch@...radead.org>
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 <hch@...radead.org>
> Signed-off-by: Alexandre Ghiti <alex@...ti.fr>

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>