use getattr function

modeling_xlm_roberta.py

@@ -66,7 +66,7 @@ logger = logging.getLogger(__name__)
 
 
 def get_use_flash_attn(config: XLMRobertaFlashConfig):
-    if not config.use_flash_attn:
+    if not getattr(config, "use_flash_attn", False):
         return False
     if not torch.cuda.is_available():
         return False