IIUC, the kernel version is completely unrelated to the version magic, which is a system to ensure modules are compatible or don't load; it works by having each module have version/config info of all interfaces that it depends on. So you're not seeing any other issues with other modules that don't have code depending on the preempt option, but those four modules (and maybe others you haven't tried loading yet) do, and won't load. I think recompiling those four modules would be sufficient, but I'd rebuild them all if I was doing it, to save trouble later with any modules you haven't tested yet.

BTW, does plugging it into USB and using it as a card reader still work? I think that'll be gone too.