struct btrfs_async_delayed_work {
        struct btrfs_delayed_root *delayed_root;
        int nr;
-       struct btrfs_work work;
+       struct btrfs_work_struct work;
 };
 
-static void btrfs_async_run_delayed_root(struct btrfs_work *work)
+static void btrfs_async_run_delayed_root(struct btrfs_work_struct *work)
 {
        struct btrfs_async_delayed_work *async_work;
        struct btrfs_delayed_root *delayed_root;
                return -ENOMEM;
 
        async_work->delayed_root = delayed_root;
-       async_work->work.func = btrfs_async_run_delayed_root;
-       async_work->work.flags = 0;
+       btrfs_init_work(&async_work->work, btrfs_async_run_delayed_root,
+                       NULL, NULL);
        async_work->nr = nr;
 
-       btrfs_queue_worker(&root->fs_info->delayed_workers, &async_work->work);
+       btrfs_queue_work(root->fs_info->delayed_workers, &async_work->work);
        return 0;
 }
 
 
        btrfs_destroy_workqueue(fs_info->endio_write_workers);
        btrfs_destroy_workqueue(fs_info->endio_freespace_worker);
        btrfs_destroy_workqueue(fs_info->submit_workers);
-       btrfs_stop_workers(&fs_info->delayed_workers);
+       btrfs_destroy_workqueue(fs_info->delayed_workers);
        btrfs_destroy_workqueue(fs_info->caching_workers);
        btrfs_destroy_workqueue(fs_info->readahead_workers);
        btrfs_destroy_workqueue(fs_info->flush_workers);
                btrfs_alloc_workqueue("endio-write", flags, max_active, 2);
        fs_info->endio_freespace_worker =
                btrfs_alloc_workqueue("freespace-write", flags, max_active, 0);
-       btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta",
-                          fs_info->thread_pool_size,
-                          &fs_info->generic_worker);
+       fs_info->delayed_workers =
+               btrfs_alloc_workqueue("delayed-meta", flags, max_active, 0);
        fs_info->readahead_workers =
                btrfs_alloc_workqueue("readahead", flags, max_active, 2);
        btrfs_init_workers(&fs_info->qgroup_rescan_workers, "qgroup-rescan", 1,
         * return -ENOMEM if any of these fail.
         */
        ret = btrfs_start_workers(&fs_info->generic_worker);
-       ret |= btrfs_start_workers(&fs_info->delayed_workers);
        ret |= btrfs_start_workers(&fs_info->qgroup_rescan_workers);
        if (ret) {
                err = -ENOMEM;
              fs_info->endio_write_workers && fs_info->endio_raid56_workers &&
              fs_info->endio_freespace_worker && fs_info->rmw_workers &&
              fs_info->caching_workers && fs_info->readahead_workers &&
-             fs_info->fixup_workers)) {
+             fs_info->fixup_workers && fs_info->delayed_workers)) {
                err = -ENOMEM;
                goto fail_sb_buffer;
        }
 
                                new_pool_size);
        btrfs_workqueue_set_max(fs_info->endio_write_workers, new_pool_size);
        btrfs_workqueue_set_max(fs_info->endio_freespace_worker, new_pool_size);
-       btrfs_set_max_workers(&fs_info->delayed_workers, new_pool_size);
+       btrfs_workqueue_set_max(fs_info->delayed_workers, new_pool_size);
        btrfs_workqueue_set_max(fs_info->readahead_workers, new_pool_size);
        btrfs_set_max_workers(&fs_info->scrub_wr_completion_workers,
                              new_pool_size);