On Tue, Jul 28, 2020 at 08:10:48AM -0500, madvenka@xxxxxxxxxxxxxxxxxxx wrote: > +EXPORT_SYMBOL_GPL(trampfd_valid_regs); Why are all of these exported? I don't see a module user in this series, or did I miss it somehow? EXPORT_SYMBOL* is only needed for symbols to be used by modules, not by code that is built into the kernel. thanks, greg k-h