dm_kobject_uevent
if (!dm_kobject_uevent(md, KOBJ_REMOVE, param->event_nr, false))
if (!dm_kobject_uevent(md, KOBJ_CHANGE, param->event_nr, need_resize_uevent))
if (!dm_kobject_uevent(hc->md, KOBJ_CHANGE, param->event_nr, false))
int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action,