- req = nfs_find_and_lock_request(page, false);
- ret = PTR_ERR(req);
- if (IS_ERR(req))
- goto out;
-
- ret = migrate_page(mapping, newpage, page);
- if (!req)
- goto out;
- if (ret)
- goto out_unlock;
- page_cache_get(newpage);
- spin_lock(&mapping->host->i_lock);
- req->wb_page = newpage;
- SetPagePrivate(newpage);
- set_page_private(newpage, (unsigned long)req);
- ClearPagePrivate(page);
- set_page_private(page, 0);
- spin_unlock(&mapping->host->i_lock);
- page_cache_release(page);
-out_unlock:
- nfs_clear_page_tag_locked(req);
-out:
- return ret;