crimson: fix unused variable warnings due to assert() and NDEBUG builds

Signed-off-by: Radoslaw Zarzynski <[email protected]>
(cherry picked from commit 1cb23c3)

Author: rzarzynski

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

@@ -1568,7 +1568,7 @@ class FixedKVBtree {
           *parent_entry.node,
           parent_entry.pos,
           *child);
-        auto &cnode = (typename internal_node_t::base_t &)*child;
+        [[maybe_unused]] auto &cnode = (typename internal_node_t::base_t &)*child;
         assert(cnode.get_node_meta().begin == node_iter.get_key());
         assert(cnode.get_node_meta().end > node_iter.get_key());
         return on_found(child->template cast<leaf_node_t>());

src/crimson/os/seastore/journal/circular_journal_space.h

@@ -148,7 +148,7 @@ class CircularJournalSpace : public JournalAllocator {
     return convert_paddr_to_abs_addr(seq.offset);
   }
   void set_written_to(journal_seq_t seq) {
-    rbm_abs_addr addr = convert_paddr_to_abs_addr(seq.offset);
+    [[maybe_unused]] rbm_abs_addr addr = convert_paddr_to_abs_addr(seq.offset);
     assert(addr >= get_records_start());
     assert(addr < get_journal_end());
     written_to = seq;

src/crimson/os/seastore/lba_manager/btree/btree_lba_manager.h

@@ -688,7 +688,7 @@ class BtreeLBAManager : public LBAManager {
 	auto ait = alloc_infos.begin();
 	for (; mit != mappings.end(); mit++, ait++) {
 	  auto mapping = static_cast<BtreeLBAMapping*>(mit->release());
-	  auto &alloc_info = *ait;
+	  [[maybe_unused]] auto &alloc_info = *ait;
 	  assert(mapping->get_key() == alloc_info.key);
 	  assert(mapping->get_raw_val().get_laddr() ==
 	    alloc_info.val.get_laddr());

src/crimson/os/seastore/linked_tree_node.h

@@ -417,7 +417,8 @@ class ParentNode {
 	iter, t.add_transactional_view<copy_dests_t>(t));
     }
     auto &copy_dests = static_cast<copy_dests_t&>(*iter);
-    auto [it, inserted] = copy_dests.dests_by_key.insert(dest);
+    [[maybe_unused]] auto [it, inserted] =
+      copy_dests.dests_by_key.insert(dest);
     assert(inserted || it->get() == dest.get());
   }
 

src/crimson/os/seastore/omap_manager/btree/omap_btree_node_impl.cc

@@ -293,7 +293,7 @@ OMapInnerNode::list(
 	      }
             }
             if (child_result.size() && last && iter == liter - 1) {
-	      auto biter = --(child_result.end());
+	      [[maybe_unused]] auto biter = --(child_result.end());
 	      if (config.last_inclusive) {
 		assert(biter->first <= *last);
 	      } else {

src/crimson/osd/pg_map.cc

@@ -73,7 +73,7 @@ seastar::future<core_id_t> PGShardMapping::get_or_create_pg_mapping(
         }
         ceph_assert_always(primary_mapping.core_to_num_pgs.end() != count_iter);
         ++(count_iter->second);
-        auto [insert_iter, inserted] =
+        [[maybe_unused]] auto [insert_iter, inserted] =
           primary_mapping.pg_to_core.emplace(pgid, core_to_update);
         assert(inserted);
         DEBUG("mapping pg {} to core {} (primary): num_pgs {}",
@@ -86,7 +86,7 @@ seastar::future<core_id_t> PGShardMapping::get_or_create_pg_mapping(
         if (find_iter == other_mapping.pg_to_core.end()) {
           DEBUG("mapping pg {} to core {} (others)",
                 pgid, core_to_update);
-          auto [insert_iter, inserted] =
+          [[maybe_unused]] auto [insert_iter, inserted] =
             other_mapping.pg_to_core.emplace(pgid, core_to_update);
           assert(inserted);
         } else {

src/crimson/osd/pg_recovery.cc

@@ -409,7 +409,7 @@ PGRecovery::on_local_recover(
     [soid, &recovery_info, is_delete, &t, this] {
     if (soid.is_snap()) {
       OSDriver::OSTransaction _t(pg->get_osdriver().get_transaction(&t));
-      int r = pg->get_snap_mapper().remove_oid(soid, &_t);
+      [[maybe_unused]] int r = pg->get_snap_mapper().remove_oid(soid, &_t);
       assert(r == 0 || r == -ENOENT);
 
       if (!is_delete) {