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

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Message-Id: <20230221060723.26291-1-bhe@redhat.com>
Date:   Tue, 21 Feb 2023 14:07:21 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, arnd@...db.de, hch@...radead.org,
        mcgrof@...nel.org, Baoquan He <bhe@...hat.com>
Subject: [RFC PATCH 0/2] arch/*/io.h: remove ioremap_uc in some architectures

In a patchset reviewing, Arnd suggested removing arch specific ioremap_uc()
and using default one defined in asm-generic/io.h instead, other than
x86 and ia64. Please see below link for more details:

https://lore.kernel.org/all/056cc71f-7fb9-4d38-a442-a05de6f7d437@app.fastmail.com/T/#u

And Arnd also provided an old link where people earlier discussed this.

https://lore.kernel.org/all/20191111192258.2234502-1-arnd@arndb.de/

So in this patchset, I firstly add including asm-generic/io.h for mips,
then remove all arch specific ioremap_uc() definitions, except of x86
ans ia64. With the removing, those ARCH-es will have default
ioremap_uc() defined in asm-generic/io.h.

Baoquan He (2):
  mips: add <asm-generic/io.h> including
  arch/*/io.h: remove ioremap_uc in some architectures

 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 -
 9 files changed, 46 insertions(+), 14 deletions(-)

-- 
2.34.1