+//! Networking.
+
+#[cfg(CONFIG_PHYLIB)]

I brought this up on the rust for linux list, but did not get a answer
which convinced me.

Have you tried building this with PHYLIB as a kernel module? 

My understanding is that at the moment, this binding code is always
built in. So you somehow need to force phylib core to also be builtin.
Or you don't build the binding, and also don't allow a module to use
the binding.

	Andrew