What do y'all think about renaming "restrictedmem" to "guardedmem"?
I want to start referring to the code/patches by its syscall/implementation name
instead of "UPM", as "UPM" is (a) very KVM centric, (b) refers to the broader effort
and not just the non-KVM code, and (c) will likely be confusing for future reviewers
since there's nothing in the code that mentions "UPM" in any way.
But typing out restrictedmem is quite tedious, and git grep shows that "rmem" is
already used to refer to "reserved memory".
Renaming the syscall to "guardedmem"...