linux-kernel - Re: [PATCH 1/2] asm-generic: io: remove {read,write} string functions

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Date:	Sat, 28 Apr 2012 10:46:04 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Will Deacon <will.deacon@....com>
Cc:	Mike Frysinger <vapier@...too.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"uclinux-dist-devel@...ckfin.uclinux.org" 
	<uclinux-dist-devel@...ckfin.uclinux.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 1/2] asm-generic: io: remove {read,write} string functions

On Fri, Apr 27, 2012 at 18:53, Will Deacon <will.deacon@....com> wrote:
> On Fri, Apr 27, 2012 at 05:17:47PM +0100, Mike Frysinger wrote:
>> On Friday 27 April 2012 06:42:55 Will Deacon wrote:
>> > The {read,write}s{b,w,l} functions are not defined across all
>> > architectures and therefore shouldn't be used by portable drivers. We
>> > should encourage driver writers to use the io{read,write}{8,16,32}_rep
>> > functions instead.
>>
>> well, that isn't true today as a grep of the drivers/ tree shows.  perhaps we
>> should fix that first ?  quite a number of architectures do implement these.
>
> Sure, and architectures can continue to implement these if they're using
> drivers that require them (I'll reintroduce them for blackfin). They
> shouldn't be used for new architectures though, so any drivers that are
> required by folks using asm-generic/io.h will need converting.

Doh, I'm just about to introduce them for m68k for 3.5...
https://lkml.org/lkml/2012/4/21/161

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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