diff --git a/mm/mempool.c b/mm/mempool.c
index 44f5fa98c1e77f34ce3f56b715e3e38e9755af54..0ef8cc8d1602246a670d4e443ba7624bd2c99df0 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -213,6 +213,7 @@ EXPORT_SYMBOL(mempool_init_node);
 
 /**
  * mempool_init - initialize a memory pool
+ * @pool:      pointer to the memory pool that should be initialized
  * @min_nr:    the minimum number of elements guaranteed to be
  *             allocated for this pool.
  * @alloc_fn:  user-defined element-allocation function.