+/**
+ * struct node_access_nodes - Access class device to hold user visible
+ * relationships to other nodes.
+ * @dev: Device for this memory access class
+ * @list_node: List element in the node's access list
+ * @access: The access class rank
+ */
+struct node_access_nodes {
+ struct device dev;
+ struct list_head list_node;
+ unsigned access;
+};
+#define to_access_nodes(dev) container_of(dev, struct node_access_nodes, dev)
+
+static struct attribute *node_init_access_node_attrs[] = {
+ NULL,
+};
+
+static struct attribute *node_targ_access_node_attrs[] = {
+ NULL,
+};
+
+static const struct attribute_group initiators = {
+ .name = "initiators",
+ .attrs = node_init_access_node_attrs,
+};
+
+static const struct attribute_group targets = {
+ .name = "targets",
+ .attrs = node_targ_access_node_attrs,
+};
+
+static const struct attribute_group *node_access_node_groups[] = {
+ &initiators,
+ &targets,
+ NULL,
+};
+
+static void node_remove_accesses(struct node *node)
+{
+ struct node_access_nodes *c, *cnext;
+
+ list_for_each_entry_safe(c, cnext, &node->access_list, list_node) {
+ list_del(&c->list_node);
+ device_unregister(&c->dev);
+ }
+}
+
+static void node_access_release(struct device *dev)
+{
+ kfree(to_access_nodes(dev));
+}
+
+static struct node_access_nodes *node_init_node_access(struct node *node,
+ unsigned access)
+{
+ struct node_access_nodes *access_node;
+ struct device *dev;
+
+ list_for_each_entry(access_node, &node->access_list, list_node)
+ if (access_node->access == access)
+ return access_node;
+
+ access_node = kzalloc(sizeof(*access_node), GFP_KERNEL);
+ if (!access_node)
+ return NULL;
+
+ access_node->access = access;
+ dev = &access_node->dev;
+ dev->parent = &node->dev;
+ dev->release = node_access_release;
+ dev->groups = node_access_node_groups;
+ if (dev_set_name(dev, "access%u", access))
+ goto free;
+
+ if (device_register(dev))
+ goto free_name;
+
+ pm_runtime_no_callbacks(dev);
+ list_add_tail(&access_node->list_node, &node->access_list);
+ return access_node;
+free_name:
+ kfree_const(dev->kobj.name);
+free:
+ kfree(access_node);
+ return NULL;
+}
+