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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-28 16:41:41 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-29 21:12:12 +0100
commitced6473e7486702f530a49f886b73195e4977734 (patch)
treef4622f9caeccd1c86f340a86508287ff68670a1d
parentkernfs: Declare two local data structures static (diff)
downloadlinux-ced6473e7486702f530a49f886b73195e4977734.tar.xz
linux-ced6473e7486702f530a49f886b73195e4977734.zip
driver core: class: add class_groups support
struct class needs to have a set of default groups that are added, as adding individual attributes does not work well in the long run. So add support for that. Future patches will convert the existing usages of class_attrs to use class_groups and then class_attrs will go away. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/base/class.c15
-rw-r--r--include/linux/device.h2
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 71059e32bebc..a2b2896693d6 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -163,6 +163,18 @@ static void klist_class_dev_put(struct klist_node *n)
put_device(dev);
}
+static int class_add_groups(struct class *cls,
+ const struct attribute_group **groups)
+{
+ return sysfs_create_groups(&cls->p->subsys.kobj, groups);
+}
+
+static void class_remove_groups(struct class *cls,
+ const struct attribute_group **groups)
+{
+ return sysfs_remove_groups(&cls->p->subsys.kobj, groups);
+}
+
int __class_register(struct class *cls, struct lock_class_key *key)
{
struct subsys_private *cp;
@@ -203,6 +215,8 @@ int __class_register(struct class *cls, struct lock_class_key *key)
kfree(cp);
return error;
}
+ error = class_add_groups(class_get(cls), cls->class_groups);
+ class_put(cls);
error = add_class_attrs(class_get(cls));
class_put(cls);
return error;
@@ -213,6 +227,7 @@ void class_unregister(struct class *cls)
{
pr_debug("device class '%s': unregistering\n", cls->name);
remove_class_attrs(cls);
+ class_remove_groups(cls, cls->class_groups);
kset_unregister(&cls->p->subsys);
}
diff --git a/include/linux/device.h b/include/linux/device.h
index 4264caacebb9..4cd8e52033b0 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -362,6 +362,7 @@ int subsys_virtual_register(struct bus_type *subsys,
* @name: Name of the class.
* @owner: The module owner.
* @class_attrs: Default attributes of this class.
+ * @class_groups: Default attributes of this class.
* @dev_groups: Default attributes of the devices that belong to the class.
* @dev_kobj: The kobject that represents this class and links it into the hierarchy.
* @dev_uevent: Called when a device is added, removed from this class, or a
@@ -390,6 +391,7 @@ struct class {
struct module *owner;
struct class_attribute *class_attrs;
+ const struct attribute_group **class_groups;
const struct attribute_group **dev_groups;
struct kobject *dev_kobj;