- make some internal symbols static

Modules/_collectionsmodule.c

@@ -264,7 +264,7 @@ PyDoc_STRVAR(popleft_doc, "Remove and return the leftmost element.");
 
 #define NEEDS_TRIM(deque, maxlen) ((size_t)(maxlen) < (size_t)(Py_SIZE(deque)))
 
-int
+static int
 deque_append_internal(dequeobject *deque, PyObject *item, Py_ssize_t maxlen)
 {
     if (deque->rightindex == BLOCKLEN - 1) {

Modules/_tracemalloc.c

@@ -262,7 +262,7 @@ hashtable_hash_pointer_t(_Py_hashtable_t *ht, const void *pkey)
 }
 
 
-int
+static int
 hashtable_compare_pointer_t(_Py_hashtable_t *ht, const void *pkey,
                             const _Py_hashtable_entry_t *entry)
 {

Modules/faulthandler.c

@@ -414,7 +414,7 @@ faulthandler_exc_handler(struct _EXCEPTION_POINTERS *exc_info)
 
 /* Install the handler for fatal signals, faulthandler_fatal_error(). */
 
-int
+static int
 faulthandler_enable(void)
 {
     size_t i;