diff --git a/drivers/infiniband/core/uverbs_ioctl_merge.c b/drivers/infiniband/core/uverbs_ioctl_merge.c
index f81aa888ce5c..16b575929915 100644
--- a/drivers/infiniband/core/uverbs_ioctl_merge.c
+++ b/drivers/infiniband/core/uverbs_ioctl_merge.c
@@ -556,7 +556,6 @@ void uverbs_free_spec_tree(struct uverbs_root_spec *root)
 
 	kfree(root);
 }
-EXPORT_SYMBOL(uverbs_free_spec_tree);
 
 struct uverbs_root_spec *uverbs_alloc_spec_tree(unsigned int num_trees,
 						const struct uverbs_object_tree_def **trees)
@@ -661,4 +660,3 @@ struct uverbs_root_spec *uverbs_alloc_spec_tree(unsigned int num_trees,
 	uverbs_free_spec_tree(root_spec);
 	return ERR_PTR(res);
 }
-EXPORT_SYMBOL(uverbs_alloc_spec_tree);
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 6f62146e9738..20003594b5d6 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -994,6 +994,36 @@ static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
 static CLASS_ATTR_STRING(abi_version, S_IRUGO,
 			 __stringify(IB_USER_VERBS_ABI_VERSION));
 
+static int ib_uverbs_create_uapi(struct ib_device *device,
+				 struct ib_uverbs_device *uverbs_dev)
+{
+	const struct uverbs_object_tree_def **specs;
+	struct uverbs_root_spec *specs_root;
+	unsigned int num_specs = 1;
+	unsigned int i;
+
+	if (device->driver_specs)
+		for (i = 0; device->driver_specs[i]; i++)
+			num_specs++;
+
+	specs = kmalloc_array(num_specs, sizeof(*specs), GFP_KERNEL);
+	if (!specs)
+		return -ENOMEM;
+
+	specs[0] = uverbs_default_get_objects();
+	if (device->driver_specs)
+		for (i = 0; device->driver_specs[i]; i++)
+			specs[i+1] = device->driver_specs[i];
+
+	specs_root = uverbs_alloc_spec_tree(num_specs, specs);
+	kfree(specs);
+	if (IS_ERR(specs_root))
+		return PTR_ERR(specs_root);
+
+	uverbs_dev->specs_root = specs_root;
+	return 0;
+}
+
 static void ib_uverbs_add_one(struct ib_device *device)
 {
 	int devnum;
@@ -1036,6 +1066,9 @@ static void ib_uverbs_add_one(struct ib_device *device)
 	rcu_assign_pointer(uverbs_dev->ib_dev, device);
 	uverbs_dev->num_comp_vectors = device->num_comp_vectors;
 
+	if (ib_uverbs_create_uapi(device, uverbs_dev))
+		goto err;
+
 	cdev_init(&uverbs_dev->cdev, NULL);
 	uverbs_dev->cdev.owner = THIS_MODULE;
 	uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
@@ -1055,23 +1088,6 @@ static void ib_uverbs_add_one(struct ib_device *device)
 	if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
 		goto err_class;
 
-	if (!device->driver_specs_root) {
-		const struct uverbs_object_tree_def *default_root[] = {
-			uverbs_default_get_objects()};
-
-		uverbs_dev->specs_root = uverbs_alloc_spec_tree(1,
-								default_root);
-		if (IS_ERR(uverbs_dev->specs_root))
-			goto err_class;
-	} else {
-		uverbs_dev->specs_root = device->driver_specs_root;
-		/*
-		 * Take responsibility to free the specs allocated by the
-		 * driver.
-		 */
-		device->driver_specs_root = NULL;
-	}
-
 	ib_set_client_data(device, &uverbs_client, uverbs_dev);
 
 	return;
diff --git a/drivers/infiniband/core/uverbs_std_types.c b/drivers/infiniband/core/uverbs_std_types.c
index 3aa7c7deac74..7f22b820a21b 100644
--- a/drivers/infiniband/core/uverbs_std_types.c
+++ b/drivers/infiniband/core/uverbs_std_types.c
@@ -316,4 +316,3 @@ const struct uverbs_object_tree_def *uverbs_default_get_objects(void)
 {
 	return &uverbs_default_objects;
 }
-EXPORT_SYMBOL_GPL(uverbs_default_get_objects);
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 13744b4631b4..f86d831ee27c 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -5523,37 +5523,29 @@ ADD_UVERBS_ATTRIBUTES_SIMPLE(
 	UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_CREATE_FLOW_ACTION_FLAGS,
 			     enum mlx5_ib_uapi_flow_action_flags));
 
-#define NUM_TREES	5
 static int populate_specs_root(struct mlx5_ib_dev *dev)
 {
-	const struct uverbs_object_tree_def *default_root[NUM_TREES + 1] = {
-		uverbs_default_get_objects()};
-	size_t num_trees = 1;
+	const struct uverbs_object_tree_def **trees = dev->driver_trees;
+	size_t num_trees = 0;
 
-	if (mlx5_accel_ipsec_device_caps(dev->mdev) & MLX5_ACCEL_IPSEC_CAP_DEVICE &&
-	    !WARN_ON(num_trees >= ARRAY_SIZE(default_root)))
-		default_root[num_trees++] = &mlx5_ib_flow_action;
+	if (mlx5_accel_ipsec_device_caps(dev->mdev) &
+	    MLX5_ACCEL_IPSEC_CAP_DEVICE)
+		trees[num_trees++] = &mlx5_ib_flow_action;
 
-	if (MLX5_CAP_DEV_MEM(dev->mdev, memic) &&
-	    !WARN_ON(num_trees >= ARRAY_SIZE(default_root)))
-		default_root[num_trees++] = &mlx5_ib_dm;
+	if (MLX5_CAP_DEV_MEM(dev->mdev, memic))
+		trees[num_trees++] = &mlx5_ib_dm;
 
 	if (MLX5_CAP_GEN_64(dev->mdev, general_obj_types) &
-			    MLX5_GENERAL_OBJ_TYPES_CAP_UCTX &&
-	    !WARN_ON(num_trees >= ARRAY_SIZE(default_root)))
-		default_root[num_trees++] = mlx5_ib_get_devx_tree();
+	    MLX5_GENERAL_OBJ_TYPES_CAP_UCTX)
+		trees[num_trees++] = mlx5_ib_get_devx_tree();
 
-	num_trees += mlx5_ib_get_flow_trees(default_root + num_trees);
+	num_trees += mlx5_ib_get_flow_trees(trees + num_trees);
 
-	dev->ib_dev.driver_specs_root =
-		uverbs_alloc_spec_tree(num_trees, default_root);
+	WARN_ON(num_trees >= ARRAY_SIZE(dev->driver_trees));
+	trees[num_trees] = NULL;
+	dev->ib_dev.driver_specs = trees;
 
-	return PTR_ERR_OR_ZERO(dev->ib_dev.driver_specs_root);
-}
-
-static void depopulate_specs_root(struct mlx5_ib_dev *dev)
-{
-	uverbs_free_spec_tree(dev->ib_dev.driver_specs_root);
+	return 0;
 }
 
 static int mlx5_ib_read_counters(struct ib_counters *counters,
@@ -6092,11 +6084,6 @@ int mlx5_ib_stage_ib_reg_init(struct mlx5_ib_dev *dev)
 	return ib_register_device(&dev->ib_dev, NULL);
 }
 
-static void mlx5_ib_stage_depopulate_specs(struct mlx5_ib_dev *dev)
-{
-	depopulate_specs_root(dev);
-}
-
 void mlx5_ib_stage_pre_ib_reg_umr_cleanup(struct mlx5_ib_dev *dev)
 {
 	destroy_umrc_res(dev);
@@ -6231,7 +6218,7 @@ static const struct mlx5_ib_profile pf_profile = {
 		     mlx5_ib_stage_pre_ib_reg_umr_cleanup),
 	STAGE_CREATE(MLX5_IB_STAGE_SPECS,
 		     mlx5_ib_stage_populate_specs,
-		     mlx5_ib_stage_depopulate_specs),
+		     NULL),
 	STAGE_CREATE(MLX5_IB_STAGE_IB_REG,
 		     mlx5_ib_stage_ib_reg_init,
 		     mlx5_ib_stage_ib_reg_cleanup),
@@ -6279,7 +6266,7 @@ static const struct mlx5_ib_profile nic_rep_profile = {
 		     mlx5_ib_stage_pre_ib_reg_umr_cleanup),
 	STAGE_CREATE(MLX5_IB_STAGE_SPECS,
 		     mlx5_ib_stage_populate_specs,
-		     mlx5_ib_stage_depopulate_specs),
+		     NULL),
 	STAGE_CREATE(MLX5_IB_STAGE_IB_REG,
 		     mlx5_ib_stage_ib_reg_init,
 		     mlx5_ib_stage_ib_reg_cleanup),
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index b75754efc663..320d4dfe8c2f 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -860,6 +860,7 @@ to_mcounters(struct ib_counters *ibcntrs)
 
 struct mlx5_ib_dev {
 	struct ib_device		ib_dev;
+	const struct uverbs_object_tree_def *driver_trees[6];
 	struct mlx5_core_dev		*mdev;
 	struct mlx5_roce		roce[MLX5_MAX_PORTS];
 	int				num_ports;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 4ffe3e11e8fb..3b07201b9a80 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2580,7 +2580,7 @@ struct ib_device {
 	const struct cpumask *(*get_vector_affinity)(struct ib_device *ibdev,
 						     int comp_vector);
 
-	struct uverbs_root_spec		*driver_specs_root;
+	const struct uverbs_object_tree_def *const *driver_specs;
 	enum rdma_driver_id		driver_id;
 };