As you may know, I have been working on adding more lkm support to NetBSD.
Well, I have many filesystems and even compat_freebsd loadable now.

The biggest problem is loading things which require both, for example,
a syscall and a vfs layer.  It can't be done using the lkm interface.

Does anyone have any suggestions on how to extend the lkm interface
to make things work better for this sort of thing, without hacks?

btw, if anyone is interested in the lkm stuff I have I can make a tarball
and put it somewhere ftpable.

--Michael