diff --git a/kobject-example.c b/kobject-example.c
index 41c80d7..9e4c477 100644
--- a/kobject-example.c
+++ b/kobject-example.c
@@ -13,6 +13,13 @@ static void global_ref_release(struct percpu_ref *)
 	printk("%s %d\n", __func__, __LINE__);
 }
 
+static ssize_t atomic_show(struct kobject *kobj, struct kobj_attribute *attr,
+			char *buf)
+{
+	return sysfs_emit(buf, "%ld\n", atomic_long_read(&global_ref.data->count));
+}
+static struct kobj_attribute atomic_attribute = __ATTR_RO(atomic);
+
 static ssize_t is_percpu_show(struct kobject *kobj, struct kobj_attribute *attr,
 			char *buf)
 {
@@ -74,7 +81,24 @@ static ssize_t switch_to_percpu_store(struct kobject *kobj, struct kobj_attribut
 }
 static struct kobj_attribute switch_to_percpu_attribute = __ATTR_WO(switch_to_percpu);
 
+static ssize_t get_store(struct kobject *kobj, struct kobj_attribute *attr,
+                         const char *buf, size_t count)
+{
+	percpu_ref_get(&global_ref);
+        return count;
+}
+static struct kobj_attribute get_attribute = __ATTR_WO(get);
+
+static ssize_t put_store(struct kobject *kobj, struct kobj_attribute *attr,
+                         const char *buf, size_t count)
+{
+	percpu_ref_put(&global_ref);
+        return count;
+}
+static struct kobj_attribute put_attribute = __ATTR_WO(put);
+
 static struct attribute *attrs[] = {
+	&atomic_attribute.attr,
 	&is_dying_attribute.attr,
 	&is_zero_attribute.attr,
 	&is_percpu_attribute.attr,
@@ -83,6 +107,8 @@ static struct attribute *attrs[] = {
 	&kill_attribute.attr,
 	&resurrect_attribute.attr,
 	&switch_to_percpu_attribute.attr,
+	&get_attribute.attr,
+	&put_attribute.attr,
 	NULL,
 };
 static struct attribute_group attr_group = {