linux-kernel - Re: [PATCH 2/5] lguest guest feedback tidyups

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Message-ID: <20070513184339.GZ4095@ftp.linux.org.uk>
Date:	Sun, 13 May 2007 19:43:39 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>,
	virtualization <virtualization@...ts.linux-foundation.org>,
	Jeff Garzik <jeff@...zik.org>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 2/5] lguest guest feedback tidyups

On Fri, May 11, 2007 at 11:21:30AM +1000, Rusty Russell wrote:
>  	/* Devices are in page above top of "normal" mem. */
> -	lguest_devices = ioremap(max_pfn << PAGE_SHIFT, PAGE_SIZE);
> +	lguest_devices = (__force void*)ioremap(max_pfn<<PAGE_SHIFT,PAGE_SIZE);

Er...  What's being done here?  What are we mapping and what's going to
be accessed when we dereference that sucker?
-
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