diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h
index b61bd6f..8146aa9 100644
--- a/include/linux/percpu-refcount.h
+++ b/include/linux/percpu-refcount.h
@@ -66,7 +66,8 @@
 	struct rcu_head		rcu;
 };
 
-int percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release);
+int __must_check percpu_ref_init(struct percpu_ref *ref,
+				 percpu_ref_func_t *release);
 void percpu_ref_kill(struct percpu_ref *ref);
 
 #define PCPU_STATUS_BITS	2