Do you have a reference expanding on that? I was just reading up on BPF/eBPF the other day (https://lwn.net/Articles/740157/) and (https://qmonnet.github.io/whirl-offload/2016/09/01/dive-into...).

From both of those I gathered that, with reference to Linux, BPF == eBPF, with the older implementation (cBPF) being deprecated.

So as the linked article is about Linux, I thought that in this case BPF == eBPF

And? Nobody is talking about BPF, only you. And lwn is confused about this, not me.

Where is the difference between BSD pf and Linux BPF implementation? eBPF aside