Issue #1717: rename tp_compare to tp_reserved.  I'll change the
type of tp_compare in a separate commit, for ease of reversion
should things go wrong.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 1c524c1..9e93dda 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -3182,7 +3182,7 @@
     0,                                  /* tp_print */
     0,                                  /* tp_getattr */
     0,                                  /* tp_setattr */
-    0,                                  /* tp_compare */
+    0,                                  /* tp_reserved */
     (reprfunc)bytes_repr,               /* tp_repr */
     0,                                  /* tp_as_number */
     &bytes_as_sequence,                 /* tp_as_sequence */
@@ -3291,7 +3291,7 @@
     0,                                 /* tp_print */
     0,                                 /* tp_getattr */
     0,                                 /* tp_setattr */
-    0,                                 /* tp_compare */
+    0,                                 /* tp_reserved */
     0,                                 /* tp_repr */
     0,                                 /* tp_as_number */
     0,                                 /* tp_as_sequence */