drivers/md/dm-vdo/packer.c add_data_vio_to_packer_bin() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/packer.c compressed_write_end_io() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/packer.c finish_compressed_write() -> (struct vdo_completion)->error_handler [8637004031277953024]

drivers/md/dm-vdo/packer.c handle_compressed_write_error() -> (struct vdo_completion)->error_handler [8637004031277953024]

drivers/md/dm-vdo/packer.c remove_from_bin() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/packer.c vdo_attempt_packing() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/packer.c write_all_non_empty_bins() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/packer.c write_bin() -> (struct vdo_completion)->error_handler [5439583924607545344]

drivers/md/dm-vdo/vdo.c continue_parent() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vdo.c finish_entering_read_only_mode() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vdo.c finish_reading_super_block() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vdo.c handle_write_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/vdo.c initialize_geometry_block() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/vdo.c initialize_super_block() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/vdo.c initialize_vdo() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vdo.c make_thread_read_only() -> (struct vdo_completion)->error_handler [195765591855538176,8632897492150095872]

drivers/md/dm-vdo/vdo.c notify_vdo_of_read_only_mode() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vdo.c perform_synchronous_action() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/vdo.c read_super_block_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/vdo.c vdo_destroy() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/vdo.c vdo_enable_read_only_entry() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/vdo.c vdo_make() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vdo.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c apply_journal_entries() -> (struct vdo_completion)->error_handler [629888963225763840]

drivers/md/dm-vdo/slab-depot.c apply_to_slabs() -> (struct vdo_completion)->error_handler [6100805549957750784]

drivers/md/dm-vdo/slab-depot.c complete_write() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/slab-depot.c copy_callback() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c do_drain_step() -> (struct vdo_completion)->error_handler [6100805549957750784]

drivers/md/dm-vdo/slab-depot.c do_resume_step() -> (struct vdo_completion)->error_handler [6100805549957750784]

drivers/md/dm-vdo/slab-depot.c finish_combining_zones() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c finish_reference_block_load() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/slab-depot.c finish_reference_block_write() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/slab-depot.c finish_scrubbing() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c flush_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c flush_for_reaping() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c handle_combining_error() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/slab-depot.c initialize_block_allocator() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c initialize_slab_scrubber() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/slab-depot.c initialize_slab_summary_block() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/slab-depot.c initiate_load() -> (struct vdo_completion)->error_handler [6100805549957750784]

drivers/md/dm-vdo/slab-depot.c load_reference_block_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c load_reference_block_group() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c load_summary_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c notify_block_allocator_of_read_only_mode() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c prepare_to_allocate() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/slab-depot.c read_slab_journal_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c read_slab_journal_tail() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c read_slab_journal_tail_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c scrub_next_slab() -> (struct vdo_completion)->error_handler [629888963225763840]

drivers/md/dm-vdo/slab-depot.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c vdo_prepare_completion_for_requeue() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c write_reference_block() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c write_reference_block_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c write_slab_journal_block() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/slab-depot.c write_slab_journal_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c write_slab_summary_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/slab-depot.c write_summary_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/dedupe.c drain_hash_zone() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dedupe.c finish_locking() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c finish_querying() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c finish_unlocking() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c finish_verifying() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c fork_hash_lock() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c get_thread_id_for_zone() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dedupe.c initialize_index() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/dedupe.c initialize_zone() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/dedupe.c launch_dedupe() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c resume_index() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dedupe.c suspend_index() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dedupe.c vdo_acquire_hash_lock() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c vdo_free_hash_zones() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/dedupe.c vdo_make_hash_zones() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dedupe.c verify_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/dump.c dump_data_vio() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c advance_tail() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c assign_entries() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c assign_entry() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c check_for_drain_complete() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c complete_reaping() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c complete_write() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c complete_write_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/recovery-journal.c continue_committed_waiter() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c enter_journal_read_only_mode() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c finish_reaping() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c flush_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/recovery-journal.c handle_flush_error() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c handle_write_error() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c initialize_lock_counter() -> (struct vdo_completion)->error_handler [0,6248657043790843904]

drivers/md/dm-vdo/recovery-journal.c initialize_recovery_block() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/recovery-journal.c notify_commit_waiters() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c notify_recovery_journal_of_read_only_mode() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c prepare_to_assign_entry() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c reap_recovery_journal_callback() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c set_journal_tail() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c vdo_add_recovery_journal_entry() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c vdo_decode_recovery_journal() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/recovery-journal.c vdo_free_recovery_journal() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c vdo_initialize_recovery_journal_post_repair() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/recovery-journal.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dm-vdo-target.c copy_callback() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dm-vdo-target.c decode_vdo() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/dm-vdo-target.c handle_load_error() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dm-vdo-target.c load_callback() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/dm-vdo-target.c perform_admin_operation() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dm-vdo-target.c pre_load_callback() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/dm-vdo-target.c prepare_admin_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/dm-vdo-target.c vdo_initialize() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/completion.c vdo_initialize_completion() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/action-manager.c launch_current_action() -> (struct vdo_completion)->error_handler [1582568524233981952]

drivers/md/dm-vdo/action-manager.c prepare_for_conclusion() -> (struct vdo_completion)->error_handler [1592404304487649280]

drivers/md/dm-vdo/action-manager.c prepare_for_next_zone() -> (struct vdo_completion)->error_handler [1592404304487649280]

drivers/md/dm-vdo/action-manager.c preserve_error() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/action-manager.c vdo_make_action_manager() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/action-manager.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/action-manager.c vdo_prepare_completion_for_requeue() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c allocate_block_map_page() -> (struct vdo_completion)->error_handler [61469454147137536]

drivers/md/dm-vdo/block-map.c fetch_mapping_page() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c finish_block_map_page_load() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c finish_lookup() -> (struct vdo_completion)->error_handler [8637004031277953024]

drivers/md/dm-vdo/block-map.c finish_page_write() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/block-map.c finish_processing_page() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c flush_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c get_mapping_from_fetched_page() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c handle_io_error() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c handle_write_error() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/block-map.c journal_block_map_allocation() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/block-map.c launch_cursor() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c load_cache_page_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c load_page() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c load_page_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c put_mapping_in_fetched_page() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c return_to_pool() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/block-map.c traversal_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c vdo_get_mapped_block() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/block-map.c vdo_get_page() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c vdo_put_mapped_block() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/block-map.c write_cache_page_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/block-map.c write_page() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/block-map.c write_page_callback() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c write_page_endio() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/block-map.c write_pages() -> (struct vdo_completion)->error_handler [4586270039321108480]

drivers/md/dm-vdo/flush.c allocate_flush() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/flush.c launch_flush() -> (struct vdo_completion)->error_handler [726147801820794880]

drivers/md/dm-vdo/flush.c vdo_complete_flush() -> (struct vdo_completion)->error_handler [2055635608618377216]

drivers/md/dm-vdo/flush.c vdo_free_flusher() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/flush.c vdo_make_flusher() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/flush.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/admin-state.c vdo_finish_operation() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/logical-zone.c initialize_zone() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/repair.c abort_repair() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/repair.c add_slab_journal_entries() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c block_map_page_loaded() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c fetch_block_map_page() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c fetch_page() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c finish_journal_load() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/repair.c finish_repair() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c free_repair_completion() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/repair.c handle_block_map_page_load_error() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/repair.c handle_journal_load_error() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/repair.c handle_page_load_error() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c page_loaded() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c read_journal_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/repair.c rebuild_from_leaves() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/repair.c recover_block_map() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/repair.c recover_ready_pages() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/repair.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/repair.c vdo_repair() -> (struct vdo_completion)->error_handler [0,4033240716803194880]

drivers/md/dm-vdo/data-vio.c allocate_block() -> (struct vdo_completion)->error_handler [8637004031277953024]

drivers/md/dm-vdo/data-vio.c assign_data_vio() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c assign_data_vio_to_waiter() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c complete_data_vio() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c continue_data_vio_with_block_map_slot() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/data-vio.c data_vio_allocate_data_block() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/data-vio.c decrement_reference_count() -> (struct vdo_completion)->error_handler [396225470290100224]

drivers/md/dm-vdo/data-vio.c free_data_vio_pool() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/data-vio.c handle_allocation_error() -> (struct vdo_completion)->error_handler [8637004031277953024]

drivers/md/dm-vdo/data-vio.c increment_reference_count() -> (struct vdo_completion)->error_handler [396225470290100224]

drivers/md/dm-vdo/data-vio.c initialize_data_vio() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c initialize_vio() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c journal_remapping() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/data-vio.c launch_bio() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c launch_data_vio() -> (struct vdo_completion)->error_handler [8637004031277953024]

drivers/md/dm-vdo/data-vio.c make_data_vio_pool() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/data-vio.c process_release_callback() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/data-vio.c read_endio() -> (struct vdo_completion)->error_handler [ignore]

drivers/md/dm-vdo/data-vio.c reuse_or_release_resources() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c update_block_map() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/data-vio.c vdo_launch_bio() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/data-vio.c vdo_prepare_completion() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/io-submitter.c __submit_metadata_vio() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vio.c acquire_vio_from_pool() -> (struct vdo_completion)->error_handler [min-max]

drivers/md/dm-vdo/vio.c allocate_vio_components() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/vio.c create_multi_block_metadata_vio() -> (struct vdo_completion)->error_handler [0-u64max]

drivers/md/dm-vdo/vio.c initialize_vio() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/vio.c make_vio_pool() -> (struct vdo_completion)->error_handler [0]

drivers/md/dm-vdo/vio.c return_vio_to_pool() -> (struct vdo_completion)->error_handler [0-u64max]