ttm_tt_bind
r = ttm_tt_bind(bo->ttm, &tmp_mem, ctx);
int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem,
r = ttm_tt_bind(bo->ttm, &tmp_mem, &ctx);
ret = ttm_tt_bind(bo->ttm, mem, ctx);
ret = ttm_tt_bind(ttm, new_mem, ctx);
EXPORT_SYMBOL(ttm_tt_bind);