ttm_tt_unpopulate
.ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
void (*ttm_tt_unpopulate)(struct ttm_tt *ttm);
void ttm_tt_unpopulate(struct ttm_tt *ttm);
.ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
ttm_tt_unpopulate(ttm);
ttm_tt_unpopulate(ttm);
if (ttm->bdev->driver->ttm_tt_unpopulate)
ttm->bdev->driver->ttm_tt_unpopulate(ttm);