linux-kernel - Re: [PATCH] include/asm-generic/io.h: add 'UML' case just like 'no-MMU'

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Date:	Wed, 26 Jun 2013 09:38:48 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Richard Weinberger <richard@....at>
Cc:	Chen Gang <gang.chen@...anux.com>, Jeff Dike <jdike@...toit.com>,
	Arnd Bergmann <arnd@...db.de>,
	David Sharp <dhsharp@...gle.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>,
	uml-user <user-mode-linux-user@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH] include/asm-generic/io.h: add 'UML' case just like 'no-MMU'

On Wed, Jun 26, 2013 at 8:54 AM, Richard Weinberger <richard@....at> wrote:
>> -#ifndef CONFIG_MMU
>> +#if !CONFIG_MMU || CONFIG_UML

FWIW, the above syntax is not correct, it should be

#if !defined(CONFIG_MMU) || defined(CONFIG_UML)

> UML has no io memory but a MMU, so I'd argue that you better fix drivers/ptp/ptp_pch.c dependencies.
> _If_ ptp_pch.c really works without real io memory, you can look what I did in my GENERIC_IO series[1]
> to make nandsim work on UML. Maybe this helps.

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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