ttm_bo_reserve
r = ttm_bo_reserve(&bo->tbo, !no_intr, false, NULL);
r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
r = ttm_bo_reserve(&bo->tbo, !no_intr, false, NULL);
ret = ttm_bo_reserve(bo, true, no_wait, NULL);
err = ttm_bo_reserve(bo, true, true, NULL);
ret = ttm_bo_reserve(bo, true, false, NULL);
ret = ttm_bo_reserve(bo, true, true, NULL);