whatsnew: os.open O_PATH and O_TMPFILE.

Doc/library/os.rst

@@ -940,8 +940,9 @@ or `the MSDN <http://msdn.microsoft.com/en-us/library/z0kc8e3z.aspx>`_ on Window
    the C library.
 
    .. versionchanged:: 3.4
-      Add :data:`O_TMPFILE` constant. It's only available on Linux Kernel 3.11
-      or newer.
+      Add :data:`O_PATH` on systems that support it.
+      Add :data:`O_TMPFILE`, only available on Linux Kernel 3.11
+        or newer.
 
 
 .. function:: openpty()

Doc/whatsnew/3.4.rst

@@ -1129,10 +1129,11 @@ Windows).  (Contributed by Brian Curtin in :issue:`11939`.)
 :func:`os.path.ismount` now recognizes volumes mounted below a drive
 root on Windows. (Contributed by Tim Golden in :issue:`9035`.)
 
-:func:`os.open` supports a new flag, :data:`~os.O_TMPFILE` (unnamed temporary
-file) on platforms that provide it (as of 3.4.0 release, that means Linux
-systems with a kernel version of 3.11 or newer that have uapi headers).
-(Contributed by Christian Heimes in :issue:`18673`.)
+:func:`os.open` supports two new flags on platforms that provide them,
+:data:`~os.O_TMPFILE` (unnamed temporary file, as of 3.4.0 release available
+only on Linux systems with a kernel version of 3.11 or newer that have uapi
+headers), and :data:`~os.O_PATH` (un-opened file descriptor).  (Contributed by
+Christian Heimes in :issue:`18673` and Benjamin Peterson, respectively.)
 
 
 pdb