Comment by ajross

No, that's too far down the pedantry rabbit hole. "mmap()" is quite literally a C function in the 4.2BSD libc. It happens to wrap a system call of the same name, but to claim that they are different when they arrived in the same software and were written by the same author at the same time is straining the argument past the breaking point. You now have a "C Erasure Polemic" and not a clarifying comment.

If you take a kernel written in C and implement a VM system for it in C and expose a new API for it to be used by userspace processes written in C, it doesn't magically become "not C" just because there's a hardware trap in the middle somewhere.

mmap() is a C API. I mean, duh.