diff --git a/src/osd/PG.cc b/src/osd/PG.cc
index f21bb66f0e4..e962ff64627 100644
--- a/src/osd/PG.cc
+++ b/src/osd/PG.cc
@@ -1996,8 +1996,7 @@ void PG::upgrade(ObjectStore *store, const interval_set<snapid_t> &snapcolls)
       hobject_t cur;
       vector<hobject_t> objects;
       while (1) {
-	int r = store->collection_list_partial(
-	  cid,
+	int r = get_pgbackend()->objects_list_partial(
 	  cur,
 	  store->get_ideal_list_min(),
 	  store->get_ideal_list_max(),
@@ -2045,8 +2044,7 @@ void PG::upgrade(ObjectStore *store, const interval_set<snapid_t> &snapcolls)
   while (1) {
     dout(1) << "Updating snap_mapper from main collection, "
 	    << done << " objects done" << dendl;
-    int r = store->collection_list_partial(
-      cid,
+    int r = get_pgbackend()->objects_list_partial(
       cur,
       store->get_ideal_list_min(),
       store->get_ideal_list_max(),
@@ -3038,9 +3036,9 @@ int PG::build_scrub_map_chunk(
 
   // objects
   vector<hobject_t> ls;
-  int ret = osd->store->collection_list_range(coll, start, end, 0, &ls);
+  int ret = get_pgbackend()->objects_list_range(start, end, 0, &ls);
   if (ret < 0) {
-    dout(5) << "collection_list_range error: " << ret << dendl;
+    dout(5) << "objects_list_range error: " << ret << dendl;
     return ret;
   }
 
@@ -3560,11 +3558,13 @@ void PG::chunky_scrub(ThreadPool::TPHandle &handle)
           hobject_t start = scrubber.start;
           while (!boundary_found) {
             vector<hobject_t> objects;
-            ret = osd->store->collection_list_partial(coll, start,
-                                                      cct->_conf->osd_scrub_chunk_min,
-						      cct->_conf->osd_scrub_chunk_max,
-						      0,
-                                                      &objects, &scrubber.end);
+            ret = get_pgbackend()->objects_list_partial(
+	      start,
+	      cct->_conf->osd_scrub_chunk_min,
+	      cct->_conf->osd_scrub_chunk_max,
+	      0,
+	      &objects,
+	      &scrubber.end);
             assert(ret >= 0);
 
             // in case we don't find a boundary: start again at the end
diff --git a/src/osd/ReplicatedPG.cc b/src/osd/ReplicatedPG.cc
index cc156a16e97..646b01c47c7 100644
--- a/src/osd/ReplicatedPG.cc
+++ b/src/osd/ReplicatedPG.cc
@@ -639,12 +639,13 @@ void ReplicatedPG::do_pg_op(OpRequestRef op)
 	hobject_t next;
 	hobject_t current = response.handle;
 	osr->flush();
-	int r = osd->store->collection_list_partial(coll, current,
-						    list_size,
-						    list_size,
-						    snapid,
-						    &sentries,
-						    &next);
+	int r = pgbackend->objects_list_partial(
+	  current,
+	  list_size,
+	  list_size,
+	  snapid,
+	  &sentries,
+	  &next);
 	if (r != 0) {
 	  result = -EINVAL;
 	  break;
@@ -8209,8 +8210,7 @@ void ReplicatedPG::scan_range(
 
   vector<hobject_t> ls;
   ls.reserve(max);
-  int r = osd->store->collection_list_partial(coll, bi->begin, min, max,
-					      0, &ls, &bi->end);
+  int r = pgbackend->objects_list_partial(bi->begin, min, max, 0, &ls, &bi->end);
   assert(r >= 0);
   dout(10) << " got " << ls.size() << " items, next " << bi->end << dendl;
   dout(20) << ls << dendl;
@@ -8225,7 +8225,7 @@ void ReplicatedPG::scan_range(
       dout(20) << "  " << *p << " " << obc->obs.oi.version << dendl;
     } else {
       bufferlist bl;
-      int r = osd->store->getattr(coll, *p, OI_ATTR, bl);
+      int r = pgbackend->objects_get_attr(*p, OI_ATTR, &bl);
       assert(r >= 0);
       object_info_t oi(bl);
       bi->objects[*p] = oi.version;