Merge with 3.1.
diff --git a/Doc/c-api/init.rst b/Doc/c-api/init.rst
index 535bf12..9a78834 100644
--- a/Doc/c-api/init.rst
+++ b/Doc/c-api/init.rst
@@ -489,7 +489,7 @@
:ref:`lock-objects` in the child. When extending or embedding Python, there
is no way to inform Python of additional (non-Python) locks that need to be
acquired before or reset after a fork. OS facilities such as
-:c:func:`posix_atfork` would need to be used to accomplish the same thing.
+:c:func:`pthread_atfork` would need to be used to accomplish the same thing.
Additionally, when extending or embedding Python, calling :c:func:`fork`
directly rather than through :func:`os.fork` (and returning to or calling
into Python) may result in a deadlock by one of Python's internal locks