Last week Meltdown/Spectrum patch wrangler Thomas Gleixner sent in various code clean-ups for Retpolines and KPTI with Linux 4.16 while today more feature work has been submitted. This initial initial mitigation work for Spectre v1 as well as IBPB support…

Source: Phoronix – Spectre V1 Mitigation, IBPB Support Sent In For Linux 4.16