From 889851ecc355cad3d79f5692a6dbd3ae3127647b Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Sat, 22 Jul 2023 23:44:33 +0200
Subject: [PATCH] gh-106320: Remove _PyFunction_Vectorcall() API (#107071)

Move _PyFunction_Vectorcall() API to the internal C API.
No longer export the function.
---
 Include/cpython/funcobject.h       | 6 ------
 Include/internal/pycore_function.h | 6 ++++++
 Objects/call.c                     | 1 +
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/Include/cpython/funcobject.h b/Include/cpython/funcobject.h
index 6f78f5868d0..de2013323d2 100644
--- a/Include/cpython/funcobject.h
+++ b/Include/cpython/funcobject.h
@@ -79,12 +79,6 @@ PyAPI_FUNC(int) PyFunction_SetClosure(PyObject *, PyObject *);
 PyAPI_FUNC(PyObject *) PyFunction_GetAnnotations(PyObject *);
 PyAPI_FUNC(int) PyFunction_SetAnnotations(PyObject *, PyObject *);
 
-PyAPI_FUNC(PyObject *) _PyFunction_Vectorcall(
-    PyObject *func,
-    PyObject *const *stack,
-    size_t nargsf,
-    PyObject *kwnames);
-
 #define _PyFunction_CAST(func) \
     (assert(PyFunction_Check(func)), _Py_CAST(PyFunctionObject*, func))
 
diff --git a/Include/internal/pycore_function.h b/Include/internal/pycore_function.h
index ecbb7001e7d..e844d323ec7 100644
--- a/Include/internal/pycore_function.h
+++ b/Include/internal/pycore_function.h
@@ -8,6 +8,12 @@ extern "C" {
 #  error "this header requires Py_BUILD_CORE define"
 #endif
 
+extern PyObject* _PyFunction_Vectorcall(
+    PyObject *func,
+    PyObject *const *stack,
+    size_t nargsf,
+    PyObject *kwnames);
+
 #define FUNC_MAX_WATCHERS 8
 
 struct _py_func_state {
diff --git a/Objects/call.c b/Objects/call.c
index 396552d85cf..b1610dababd 100644
--- a/Objects/call.c
+++ b/Objects/call.c
@@ -2,6 +2,7 @@
 #include "pycore_call.h"          // _PyObject_CallNoArgsTstate()
 #include "pycore_ceval.h"         // _Py_EnterRecursiveCallTstate()
 #include "pycore_dict.h"          // _PyDict_FromItems()
+#include "pycore_function.h"      // _PyFunction_Vectorcall() definition
 #include "pycore_modsupport.h"    // _Py_VaBuildStack()
 #include "pycore_object.h"        // _PyCFunctionWithKeywords_TrampolineCall()
 #include "pycore_pyerrors.h"      // _PyErr_Occurred()