user_exp_rcv_invalid is only used together with the mmu cache
(its purpose is the delayed freeing of tids that were invalidated in cache)
Since we do not use that cache, the function can go
This implements a skeleton setup function and call it on ioctl
Many missing points:
- missing pci mapping to make setup work
- no clear (passed to linux, so will likely bug out)
- missing locks/safe-guards
Conflicts:
kernel/Makefile.build.in
