add note to random state API
@@ -85,6 +85,12 @@ Random number generator
cupy.random.set_random_state
cupy.random.RandomState
+.. note::
+
+ CuPy does not provide ``cupy.random.get_state`` nor ``cupy.random.set_state`` at this time.
+ Use :func:`cupy.random.get_random_state` and :func:`cupy.random.set_random_state` instead.
+ Note that these functions use :class:`cupy.random.RandomState` instance to represent the internal state, which cannot be serialized.
+
Permutations
------------
