Re: [PATCH 2/3] mm: replace __HAVE_ARCH_PTE_SPECIAL

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To: Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH 2/3] mm: replace __HAVE_ARCH_PTE_SPECIAL
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 9 Apr 2018 10:57:57 -0700
Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-snps-arc@xxxxxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, Jerome Glisse <jglisse@xxxxxxxxxx>, mhocko@xxxxxxxxxx, aneesh.kumar@xxxxxxxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, mpe@xxxxxxxxxxxxxx, benh@xxxxxxxxxxxxxxxxxxx, paulus@xxxxxxxxx, Jonathan Corbet <corbet@xxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>, Rich Felker <dalias@xxxxxxxx>, "David S . Miller" <davem@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Vineet Gupta <vgupta@xxxxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxx>, Albert Ou <albert@xxxxxxxxxx>, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>
In-reply-to: <1523282229-20731-3-git-send-email-ldufour@linux.vnet.ibm.com>
User-agent: Mutt/1.9.2 (2017-12-15)

> -#ifdef __HAVE_ARCH_PTE_SPECIAL
> +#ifdef CONFIG_ARCH_HAS_PTE_SPECIAL
>  # define HAVE_PTE_SPECIAL 1
>  #else
>  # define HAVE_PTE_SPECIAL 0

I'd say kill this odd indirection and just use the
CONFIG_ARCH_HAS_PTE_SPECIAL symbol directly.

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References:
- [PATCH 0/3] move __HAVE_ARCH_PTE_SPECIAL in Kconfig
  - From: Laurent Dufour
- [PATCH 2/3] mm: replace __HAVE_ARCH_PTE_SPECIAL
  - From: Laurent Dufour

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