On Thu, Apr 25, 2019 at 11:17:17AM +0200, Ingo Molnar wrote: > It basically means that we silently won't do any patching and the kernel > will crash later on in mysterious ways, because paravirt patching is > usually relied on.
That's OK. The compiler emits an indirect CALL/JMP to the pv_ops structure contents. That _should_ stay valid and function correctly at all times. Not patching should at the very least cause a WARN with RETPOLINE kernels though, we hard rely on the patching actually working and writing at least a direct call.
