From f0aac63b873b354c1a16bef03563cbc3941ce7ad Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Tue, 8 Jul 2014 15:15:07 +0200
Subject: [PATCH] iommu/amd: Don't hold a reference to mm_struct

With mmu_notifiers we don't need to hold a reference to the
mm_struct during the time the pasid is bound to a device. We
can rely on the .mn_release call back to inform us when the
mm_struct goes away.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
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