diff -r 2e431fb98c6b -r 0e8b0b9a7acc mercurial/policy.py
--- a/mercurial/policy.py	Sun May 28 15:45:52 2017 +0900
+++ b/mercurial/policy.py	Tue May 02 21:15:31 2017 +0900
@@ -28,8 +28,8 @@
     # policy: (versioned package, pure package)
     b'c': (r'cext', None),
     b'allow': (r'cext', r'pure'),
-    b'cffi': (None, r'pure'),  # TODO: (r'cffi', None)
-    b'cffi-allow': (None, r'pure'),  # TODO: (r'cffi', r'pure')
+    b'cffi': (r'cffi', None),
+    b'cffi-allow': (r'cffi', r'pure'),
     b'py': (None, r'pure'),
 }