From: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Date: Wed, 2 Jan 2013 22:57:12 +0000 (+0000)
Subject: xen/gntdev: correctly unmap unlinked maps in mmu notifier
X-Git-Tag: v3.8-rc5~41^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16a1d0225e22e4e273e6b60a21db95decde666c2;p=pandora-kernel.git

xen/gntdev: correctly unmap unlinked maps in mmu notifier

If gntdev_ioctl_unmap_grant_ref is called on a range before unmapping
it, the entry is removed from priv->maps and the later call to
mn_invl_range_start won't find it to do the unmapping. Fix this by
creating another list of freeable maps that the mmu notifier can search
and use to unmap grants.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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