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[ Upstream commit0514f63cff] This reverts commit71a7974ac7. These helper functions are needed for KFD to export and import DMABufs the right way without duplicating the tracking of DMABufs associated with GEM objects while ensuring that move notifier callbacks are working as intended. CC: Christian König <christian.koenig@amd.com> CC: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>