linux-kernel - Re: [PATCH 1/2] asm-generic: add MMU variants of io.h functions

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Message-ID: <CAMjpGUfZwZu-ZCJj2cmq1w6B71-gQ8G27FpYdhseyq3hoZRL+Q@mail.gmail.com>
Date:	Sat, 2 Jul 2011 12:38:48 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	Jonas Bonn <jonas@...thpole.se>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	liqin.chen@...plusct.com, gxt@...c.pku.edu.cn
Subject: Re: [PATCH 1/2] asm-generic: add MMU variants of io.h functions

On Sat, Jul 2, 2011 at 11:53, Jonas Bonn wrote:
> Some of the implementations, in particular the ioremap variants, in
> asm-generic/io.h are for systems with an MMU.

do you mean "without an MMU" ?

> +#ifdef CONFIG_MMU
> +#define xlate_dev_mem_ptr(p)   __va(p)
> +#else
>  #define xlate_dev_mem_ptr(p)   ((void *) (p))
> +#endif

i wonder if we could do:
#ifndef __va
#define __va(p) ((void *)(p))
#endif
#define xlate_dev_mem_ptr(p)   __va(p)
-mike
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