crimson/os/seastore/FixedKVBtree: correct MAX_DEPTH

Signed-off-by: Zhang Song <[email protected]>
(cherry picked from commit fc8c8e6)

Author: zhscn

src/crimson/os/seastore/btree/btree_types.h

@@ -19,8 +19,6 @@ struct op_context_t {
   Transaction &trans;
 };
 
-constexpr uint16_t MAX_FIXEDKVBTREE_DEPTH = 8;
-
 template <typename bound_t>
 struct fixed_kv_node_meta_t {
   bound_t begin = min_max_t<bound_t>::min;

src/crimson/os/seastore/btree/fixed_kv_btree.h

@@ -40,7 +40,7 @@ template <
   typename cursor_t,
   size_t node_size>
 class FixedKVBtree {
-  static constexpr size_t MAX_DEPTH = 16;
+  static constexpr size_t MAX_DEPTH = 8;
   using self_type = FixedKVBtree<
     node_key_t,
     node_val_t,
@@ -1778,7 +1778,7 @@ class FixedKVBtree {
         c.trans, root_block)->template cast<RootBlock>();
       get_root().set_location(nroot->get_paddr());
       get_root().set_depth(iter.get_depth());
-      ceph_assert(get_root().get_depth() <= MAX_FIXEDKVBTREE_DEPTH);
+      ceph_assert(get_root().get_depth() <= MAX_DEPTH);
       set_root_node(nroot);
     }