*                               characteristics
  *
  *     @size: required memory
- *     @class: lookup performance class
+ *     @lookup: lookup performance class
  */
 struct nft_set_estimate {
        unsigned int            size;
-       enum nft_set_class      class;
+       enum nft_set_class      lookup;
 };
 
 struct nft_set_ext;
 
                features &= NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_TIMEOUT;
        }
 
-       bops       = NULL;
-       best.size  = ~0;
-       best.class = ~0;
+       bops        = NULL;
+       best.size   = ~0;
+       best.lookup = ~0;
 
        list_for_each_entry(ops, &nf_tables_set_ops, list) {
                if ((ops->features & features) != features)
 
                switch (policy) {
                case NFT_SET_POL_PERFORMANCE:
-                       if (est.class < best.class)
+                       if (est.lookup < best.lookup)
                                break;
-                       if (est.class == best.class && est.size < best.size)
+                       if (est.lookup == best.lookup && est.size < best.size)
                                break;
                        continue;
                case NFT_SET_POL_MEMORY:
                        if (est.size < best.size)
                                break;
-                       if (est.size == best.size && est.class < best.class)
+                       if (est.size == best.size && est.lookup < best.lookup)
                                break;
                        continue;
                default: