From 608192ee2f6c60aaae1c6f2f64ea45ad2667ff2d Mon Sep 17 00:00:00 2001
From: Sam Gross <colesbury@gmail.com>
Date: Fri, 3 May 2024 11:33:05 -0400
Subject: [PATCH] gh-118527: Use deferred reference counting for C functions on
 modules (#118529)

This addresses a scaling bottleneck in the free-threaded build when
calling functions like `math.floor()` concurrently from multiple
threads.
---
 Objects/moduleobject.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Objects/moduleobject.c b/Objects/moduleobject.c
index d877edaf545..a570b13e120 100644
--- a/Objects/moduleobject.c
+++ b/Objects/moduleobject.c
@@ -183,6 +183,7 @@ _add_methods_to_object(PyObject *module, PyObject *name, PyMethodDef *functions)
         if (func == NULL) {
             return -1;
         }
+        _PyObject_SetDeferredRefcount(func);
         if (PyObject_SetAttrString(module, fdef->ml_name, func) != 0) {
             Py_DECREF(func);
             return -1;