linux-kernel - Re: Page protection flags in linux on an x86 platform

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Message-Id: <200902262054.53412.arnd@arndb.de>
Date:	Thu, 26 Feb 2009 20:54:53 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Vinay Venkataraghavan <raghavanvinay@...oo.com>
Cc:	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: Page protection flags in linux on an x86 platform

On Thursday 26 February 2009, Vinay Venkataraghavan wrote:
> I am trying to port some PPC code to x86 based linux. My question is that I am need to create some page mappings using remap_pfn_range. In the code for the PPC,
> the protection flags being specified are:
> 
> __pgprot(_PAGE_NO_CACHE | _PAGE_GUARDED);

To make your code portable, use pgprot_noncached(), which works on all
architectures.

	Arnd <><
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