From: Jay Cornwall <jay.cornwall@amd.com>
Date: Mon, 28 Apr 2014 22:27:46 +0000 (-0500)
Subject: iommu/amd: Take mmap_sem when calling get_user_pages
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~158^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4378d99295fae5fd42b0ed1a3eeef2a1684e0c17;p=pandora-kernel.git

iommu/amd: Take mmap_sem when calling get_user_pages

get_user_pages requires caller to hold a read lock on mmap_sem.

Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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