linux-kernel - Re: [PATCH v2 1/2] mm: Introduce common STRUCT_PAGE_MAX

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Message-ID: <20181108180432.GH144107@arrakis.emea.arm.com>
Date:   Thu, 8 Nov 2018 18:04:33 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-arch@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-sh@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Arnd Bergmann <arnd@...db.de>,
        Palmer Dabbelt <palmer@...ive.com>,
        Stephen Bates <sbates@...thlin.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2 1/2] mm: Introduce common STRUCT_PAGE_MAX_SHIFT define

On Wed, Nov 07, 2018 at 01:54:32PM -0700, Logan Gunthorpe wrote:
> This define is used by arm64 to calculate the size of the vmemmap
> region. It is defined as the log2 of the upper bound on the size
> of a struct page.
> 
> We move it into mm_types.h so it can be defined properly instead of
> set and checked with a build bug. This also allows us to use the same
> define for riscv.
> 
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
> Acked-by: Will Deacon <will.deacon@....com>
> Acked-by: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Christoph Hellwig <hch@....de>

Acked-by: Catalin Marinas <catalin.marinas@....com>