diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c
index 6f305fb18524..3a5bd1cd1e99 100644
--- a/net/ceph/crush/mapper.c
+++ b/net/ceph/crush/mapper.c
@@ -429,7 +429,10 @@ static int is_out(const struct crush_map *map,
 /**
  * crush_choose_firstn - choose numrep distinct items of given type
  * @map: the crush_map
+ * @work: working space initialized by crush_init_workspace()
  * @bucket: the bucket we are choose an item from
+ * @weight: weight vector (for map leaves)
+ * @weight_max: size of weight vector
  * @x: crush input value
  * @numrep: the number of items to choose
  * @type: the type of item to choose
@@ -445,6 +448,7 @@ static int is_out(const struct crush_map *map,
  * @vary_r: pass r to recursive calls
  * @out2: second output vector for leaf items (if @recurse_to_leaf)
  * @parent_r: r value passed from the parent
+ * @choose_args: weights and ids for each known bucket
  */
 static int crush_choose_firstn(const struct crush_map *map,
 			       struct crush_work *work,