Use it in _multiprocessing and _sqlite.

Author: ZeroIntensity

Modules/_multiprocessing/semaphore.c

@@ -720,13 +720,6 @@ _multiprocessing_SemLock___exit___impl(SemLockObject *self,
     return _multiprocessing_SemLock_release_impl(self);
 }
 
-static int
-semlock_traverse(PyObject *s, visitproc visit, void *arg)
-{
-    Py_VISIT(Py_TYPE(s));
-    return 0;
-}
-
 /*
  * Semaphore methods
  */
@@ -773,7 +766,7 @@ static PyType_Slot _PyMp_SemLockType_slots[] = {
     {Py_tp_members, semlock_members},
     {Py_tp_alloc, PyType_GenericAlloc},
     {Py_tp_new, _multiprocessing_SemLock},
-    {Py_tp_traverse, semlock_traverse},
+    {Py_tp_traverse, _PyObject_VisitType},
     {Py_tp_free, PyObject_GC_Del},
     {Py_tp_doc, (void *)PyDoc_STR("Semaphore/Mutex type")},
     {0, 0},

Modules/_sqlite/prepare_protocol.c

@@ -29,13 +29,6 @@ pysqlite_prepare_protocol_init(PyObject *self, PyObject *args, PyObject *kwargs)
     return 0;
 }
 
-static int
-pysqlite_prepare_protocol_traverse(PyObject *self, visitproc visit, void *arg)
-{
-    Py_VISIT(Py_TYPE(self));
-    return 0;
-}
-
 static void
 pysqlite_prepare_protocol_dealloc(PyObject *self)
 {
@@ -50,7 +43,7 @@ PyDoc_STRVAR(doc, "PEP 246 style object adaption protocol type.");
 static PyType_Slot type_slots[] = {
     {Py_tp_dealloc, pysqlite_prepare_protocol_dealloc},
     {Py_tp_init, pysqlite_prepare_protocol_init},
-    {Py_tp_traverse, pysqlite_prepare_protocol_traverse},
+    {Py_tp_traverse, _PyObject_VisitType},
     {Py_tp_doc, (void *)doc},
     {0, NULL},
 };

Modules/_sqlite/statement.c

@@ -116,13 +116,6 @@ stmt_dealloc(PyObject *op)
     Py_DECREF(tp);
 }
 
-static int
-stmt_traverse(PyObject *self, visitproc visit, void *arg)
-{
-    Py_VISIT(Py_TYPE(self));
-    return 0;
-}
-
 /*
  * Strip leading whitespace and comments from incoming SQL (null terminated C
  * string) and return a pointer to the first non-whitespace, non-comment
@@ -183,7 +176,7 @@ lstrip_sql(const char *sql)
 
 static PyType_Slot stmt_slots[] = {
     {Py_tp_dealloc, stmt_dealloc},
-    {Py_tp_traverse, stmt_traverse},
+    {Py_tp_traverse, _PyObject_VisitType},
     {0, NULL},
 };