return r;
        }
 
-       dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
+       dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid);
        if (dl.osd >= 0) {
                struct ceph_entity_addr *a =
                        ceph_osd_addr(osdc->osdmap, dl.osd);
 
                               const struct ceph_pg *raw_pgid,
                               struct ceph_osds *up,
                               struct ceph_osds *acting);
-extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
-                               struct ceph_pg pgid);
+int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
+                             const struct ceph_pg *raw_pgid);
 
 extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map,
                                                    u64 id);
 
 }
 
 /*
- * Return primary osd for given pgid, or -1 if none.
+ * Return acting primary for given PG, or -1 if none.
  */
-int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
+int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
+                             const struct ceph_pg *raw_pgid)
 {
        struct ceph_osds up, acting;
 
-       ceph_pg_to_up_acting_osds(osdmap, &pgid, &up, &acting);
+       ceph_pg_to_up_acting_osds(osdmap, raw_pgid, &up, &acting);
        return acting.primary;
 }
-EXPORT_SYMBOL(ceph_calc_pg_primary);
+EXPORT_SYMBOL(ceph_pg_to_acting_primary);