From 0cc678f850f2cba0cedbd133fcbbf175554cd6c6 Mon Sep 17 00:00:00 2001
From: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Date: Thu, 27 Oct 2011 17:58:49 -0400
Subject: [PATCH] xen/gnt{dev,alloc}: reserve event channels for notify

When using the unmap notify ioctl, the event channel used for
notification needs to be reserved to avoid it being deallocated prior to
sending the notification.

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