Re: [PATCH 17/21] lib: provide a simple generic ioremap implementation

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To: Christoph Hellwig <hch@xxxxxx>
Subject: Re: [PATCH 17/21] lib: provide a simple generic ioremap implementation
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Mon, 11 Nov 2019 11:10:59 +0100
Cc: Guo Ren <guoren@xxxxxxxxxx>, Michal Simek <monstr@xxxxxxxxx>, Greentime Hu <green.hu@xxxxxxxxx>, Vincent Chen <deanbo422@xxxxxxxxx>, Guan Xuetao <gxt@xxxxxxxxxx>, "the arch/x86 maintainers" <x86@xxxxxxxxxx>, alpha <linux-alpha@xxxxxxxxxxxxxxx>, "open list:SYNOPSYS ARC ARCHITECTURE" <linux-snps-arc@xxxxxxxxxxxxxxxxxxx>, Linux ARM <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, "open list:QUALCOMM HEXAGON..." <linux-hexagon@xxxxxxxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, linux-m68k <linux-m68k@xxxxxxxxxxxxxxx>, linux-mips@xxxxxxxxxxxxxxx, "moderated list:NIOS2 ARCHITECTURE" <nios2-dev@xxxxxxxxxxxxxxxxxxxxxx>, openrisc@xxxxxxxxxxxxxxxxxxxx, Parisc List <linux-parisc@xxxxxxxxxxxxxxx>, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390 <linux-s390@xxxxxxxxxxxxxxx>, Linux-sh list <linux-sh@xxxxxxxxxxxxxxx>, sparclinux <sparclinux@xxxxxxxxxxxxxxx>, linux-xtensa@xxxxxxxxxxxxxxxx, linux-mtd <linux-mtd@xxxxxxxxxxxxxxxxxxx>, linux-arch <linux-arch@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>
In-reply-to: <20191029064834.23438-18-hch@lst.de>
References: <20191029064834.23438-1-hch@lst.de> <20191029064834.23438-18-hch@lst.de>

On Tue, Oct 29, 2019 at 7:49 AM Christoph Hellwig <hch@xxxxxx> wrote:
>
> A lot of architectures reuse the same simple ioremap implementation, so
> start lifting the most simple variant to lib/ioremap.c.  It provides
> ioremap_prot and iounmap, plus a default ioremap that uses prot_noncached,
> although that can be overridden by asm/io.h.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>

References:
- generic ioremap (and lots of cleanups) v3
  - From: Christoph Hellwig
- [PATCH 17/21] lib: provide a simple generic ioremap implementation
  - From: Christoph Hellwig

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