On 6/5/23 16:04, Huang, Kai wrote: > I've changed to -ENODEV which doesn't cause build error in my test. > > I agree it's better to include errno.h explicitly but IMHO it's a problem in the > existing upstream code (tdx_kvm_hypercall() returns -ENODEV when INTEL_TDX_GUEST > is off), thus should be addressed in a separate patch but not folded into this > one. > > Since now there's no build error, I hesitated to added such patch. I can do it > separately if it should be addressed. Yes, it should be addressed.