Yu-cheng Yu [off-list ref] writes:

Insert endbr64 to assembly code of sysret_rip.

This changelog explains what the patch does, but not the WHY. It also
lacks any information why this is harmless for !CET enabled systems.

Signed-off-by: Yu-cheng Yu <redacted>
---

Please consult Dave Hansen about the void between your Signed-off-by
and the '---' line.

Thanks,

        tglx