linux-kernel - Re: [PATCH v2 1/5] ARC: mm: remove __ARCH_USE_5LEVEL

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Message-ID: <CAHk-=wi3QC7tj3rmTPg5RmK_ugVKYs-jKqX=TaASWfd73Owaig@mail.gmail.com>
Date:   Tue, 15 Oct 2019 14:48:42 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Will Deacon <will@...nel.org>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nick Piggin <npiggin@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linux-MM <linux-mm@...ck.org>,
        linux-snps-arc@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH v2 1/5] ARC: mm: remove __ARCH_USE_5LEVEL_HACK

On Tue, Oct 15, 2019 at 12:19 PM Vineet Gupta
<Vineet.Gupta1@...opsys.com> wrote:
>
> This is a non-functional change anyways since ARC has software page walker
> with 2 lookup levels (pgd -> pte)

Could we encourage other architectures to do the same, and get rid of
all uses of __ARCH_USE_5LEVEL_HACK?

            Linus