};
-static struct config_item *simple_children_make_item(struct config_group *group, const char *name)
+struct simple_children {
+ struct config_group group;
+};
+
+static inline struct simple_children *to_simple_children(struct config_item *item)
+{
+ return item ? container_of(to_config_group(item), struct simple_children, group) : NULL;
+}
+
+static int simple_children_make_item(struct config_group *group, const char *name, struct config_item **new_item)
{
struct simple_child *simple_child;
- simple_child = kmalloc(sizeof(struct simple_child), GFP_KERNEL);
+ simple_child = kzalloc(sizeof(struct simple_child), GFP_KERNEL);
if (!simple_child)
- return NULL;
+ return -ENOMEM;
- memset(simple_child, 0, sizeof(struct simple_child));
config_item_init_type_name(&simple_child->item, name,
&simple_child_type);
simple_child->storeme = 0;
- return &simple_child->item;
+ *new_item = &simple_child->item;
+ return 0;
}
static struct configfs_attribute simple_children_attr_description = {
"items have only one attribute that is readable and writeable.\n");
}
+static void simple_children_release(struct config_item *item)
+{
+ kfree(to_simple_children(item));
+}
+
static struct configfs_item_operations simple_children_item_ops = {
+ .release = simple_children_release,
.show_attribute = simple_children_attr_show,
};
* children of its own.
*/
-struct simple_children {
- struct config_group group;
-};
-
-static struct config_group *group_children_make_group(struct config_group *group, const char *name)
+static int group_children_make_group(struct config_group *group, const char *name, struct config_group **new_group)
{
struct simple_children *simple_children;
- simple_children = kmalloc(sizeof(struct simple_children),
+ simple_children = kzalloc(sizeof(struct simple_children),
GFP_KERNEL);
if (!simple_children)
- return NULL;
+ return -ENOMEM;
- memset(simple_children, 0, sizeof(struct simple_children));
config_group_init_type_name(&simple_children->group, name,
&simple_children_type);
- return &simple_children->group;
+ *new_group = &simple_children->group;
+ return 0;
}
static struct configfs_attribute group_children_attr_description = {
subsys = example_subsys[i];
config_group_init(&subsys->su_group);
- init_MUTEX(&subsys->su_sem);
+ mutex_init(&subsys->su_mutex);
ret = configfs_register_subsystem(subsys);
if (ret) {
printk(KERN_ERR "Error %d while registering subsystem %s\n",