TRACING_MAP_ELT
elt = *(TRACING_MAP_ELT(map->elts, idx));
tracing_map_elt_free(*(TRACING_MAP_ELT(map->elts, i)));
*(TRACING_MAP_ELT(map->elts, i)) = NULL;
*(TRACING_MAP_ELT(map->elts, i)) = tracing_map_elt_alloc(map);
if (IS_ERR(*(TRACING_MAP_ELT(map->elts, i)))) {
*(TRACING_MAP_ELT(map->elts, i)) = NULL;
tracing_map_elt_clear(*(TRACING_MAP_ELT(map->elts, i)));