From: Markus Armbruster <armbru@redhat.com>
Subject: Re: [PATCH] xc_map_foreign_pages(),
	a convenient alternative to xc_map_foreign_batch()
Date: Thu, 06 Sep 2007 13:24:26 +0200
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	(Kevin Tian's message of "Thu\, 6 Sep 2007 15\:44\:21 +0800")
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To: "Tian, Kevin" <kevin.tian@intel.com>
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"Tian, Kevin" <kevin.tian@intel.com> writes:

[...]
> Also why do you need an extra allocation and copy to arr?

To avoid clobbering the arr argument, which I feel would be a rather
bad API.

[...]