That is restricted to the US, involved whether a compatible implementation could be made using them and offered the possibility that all such implementations we

That is restricted to the US, involved whether a compatible implementation could be made using them and offered the possibility that all such implementations were actually fair use. It really is not relevant unless you are discussing making a Linux kernel replacement under a different license using the Linux kernel headers. As far as I last heard from lawyers on this, it is not considered to affect anyone until the legal battle finishes and as far as I can tell, if a oracle manages to say this is not okay, they will be in far deeper trouble over their DTrace module that circumvents GPL symbol exports than ZFSOnLinux that restricts itself to an interface intended to allow proprietary modules.