Address Benedikt's review

Author: vstinner

Modules/_io/bufferedio.c

@@ -454,7 +454,7 @@ _io__Buffered___sizeof___impl(buffered *self)
 static int
 buffered_traverse(PyObject *op, visitproc visit, void *arg)
 {
-    buffered *self = (buffered*)op;
+    buffered *self = buffered_CAST(op);
     Py_VISIT(Py_TYPE(self));
     Py_VISIT(self->raw);
     Py_VISIT(self->dict);

Modules/_pickle.c

@@ -7969,10 +7969,9 @@ pickle_clear(PyObject *m)
 }
 
 static void
-pickle_free(void *arg)
+pickle_free(void *m)
 {
-    PyObject *m = (PyObject*)arg;
-    _Pickle_ClearState(_Pickle_GetState(m));
+    _Pickle_ClearState(_Pickle_GetState((PyObject*)m));
 }
 
 static int

Python/import.c

@@ -1249,7 +1249,7 @@ _extensions_cache_init(void)
         hashtable_hash_str,
         hashtable_compare_str,
         hashtable_destroy_str,  // key
-        (_Py_hashtable_destroy_func)del_extensions_cache_value,  // value
+        del_extensions_cache_value,  // value
         &alloc
     );
     if (EXTENSIONS.hashtable == NULL) {