linux-kernel - Re: [PATCH v2 0/2] arch/*/io.h: remove ioremap

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Date:   Wed, 1 Mar 2023 21:37:16 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-arch@...r.kernel.org, linux-mm@...ck.org, arnd@...db.de,
        geert@...ux-m68k.org, hch@...radead.org, mcgrof@...nel.org
Subject: Re: [PATCH v2 0/2] arch/*/io.h: remove ioremap_uc in some
 architectures

On 03/01/23 at 06:22pm, Baoquan He wrote:
> This patchset tries to remove ioremap_uc() in the current architectures
> except of x86 and ia64. They will use the default ioremap_uc definition
> in <asm-generic/io.h> which returns NULL.
> 
> If any arch sees a breakage caused by the default ioremap_uc(), it can
> provide a sepcific one for its own usage.

Forgot mentioning this patchset is based on below patchset.

[PATCH v5 00/17] mm: ioremap:  Convert architectures to take GENERIC_IOREMAP way
https://lore.kernel.org/all/20230301034247.136007-1-bhe@redhat.com/T/#u

> 
> v1->v2:
>   - Update log of patch 2, and document related to ioremap_uc()
>     according to Geert's comment.
>   - Add Geert's Acked-by.
> 
> Baoquan He (2):
>   mips: add <asm-generic/io.h> including
>   arch/*/io.h: remove ioremap_uc in some architectures
> 
>  Documentation/driver-api/device-io.rst | 11 ++++--
>  arch/alpha/include/asm/io.h            |  1 -
>  arch/hexagon/include/asm/io.h          |  3 --
>  arch/m68k/include/asm/kmap.h           |  1 -
>  arch/mips/include/asm/io.h             | 47 +++++++++++++++++++++++++-
>  arch/mips/include/asm/mmiowb.h         |  2 --
>  arch/parisc/include/asm/io.h           |  2 --
>  arch/powerpc/include/asm/io.h          |  1 -
>  arch/sh/include/asm/io.h               |  2 --
>  arch/sparc/include/asm/io_64.h         |  1 -
>  10 files changed, 55 insertions(+), 16 deletions(-)
> 
> -- 
> 2.34.1
>