Issue #2396: backport the memoryview object.
diff --git a/Doc/c-api/objbuffer.rst b/Doc/c-api/objbuffer.rst
index 7d66db2..ba6e38f 100644
--- a/Doc/c-api/objbuffer.rst
+++ b/Doc/c-api/objbuffer.rst
@@ -2,8 +2,15 @@
.. _abstract-buffer:
-Buffer Protocol
-===============
+
+Old Buffer Protocol
+===================
+
+This section describes the legacy buffer protocol, which has been introduced
+in Python 1.6. It is still supported but deprecated in the Python 2.x series.
+Python 3.0 introduces a new buffer protocol which fixes weaknesses and
+shortcomings of the protocol, and has been backported to Python 2.6.
+See :ref:`bufferobjects` for more information.
.. cfunction:: int PyObject_AsCharBuffer(PyObject *obj, const char **buffer, Py_ssize_t *buffer_len)