On Mon, Feb 25, 2019 at 07:54:13AM -0800, Kris Van Hees wrote:

The goal is to further extend the BPF_PROG_TYPE_GTRACE implementation to
support what tracers commonly need, and I am also looking at ways to further
extend this model to allow more tracer-specific features as well without the
need for adding a BPF program types for every tracer.

It seems by themselves the patches don't provide any new functionality,
but instead look like plumbing to call external code.
This is no-go.
There were several attempts to do so in the past, so we documented it here:
Documentation/bpf/bpf_design_QA.rst
Q: New functionality via kernel modules?
----------------------------------------
Q: Can BPF functionality such as new program or map types, new
helpers, etc be added out of kernel module code?

A: NO.

The answer is still the same.