Use identifier API for PyObject_GetAttrString.
diff --git a/Python/_warnings.c b/Python/_warnings.c
index e563107..ebc9cb8 100644
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -247,10 +247,11 @@
PyObject *f_stderr;
PyObject *name;
char lineno_str[128];
+ _Py_identifier(__name__);
PyOS_snprintf(lineno_str, sizeof(lineno_str), ":%d: ", lineno);
- name = PyObject_GetAttrString(category, "__name__");
+ name = _PyObject_GetAttrId(category, &PyId___name__);
if (name == NULL) /* XXX Can an object lack a '__name__' attribute? */
return;