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This is to weed out accesses to the GPU while it is gated. Otherwise the accesses are silently dropped or cause a HW hang (on older chips). Bug 1514949 Change-Id: Ice4cdb9f1f736978ebb3db847f39c7439bf98134 Signed-off-by: Alex Waterman <alexw@nvidia.com> Reviewed-on: http://git-master/r/416339 Reviewed-by: Mitch Luban <mluban@nvidia.com>