Ampere back ported kernel patches for longterm 5.4 kernel.
Kernel patch is on linux-5.4.y branch: https://github.com/AmpereComputing/ampere-lts-kernel/tree/linux-5.4.y
Details please refer to wiki: https://github.com/AmpereComputing/ampere-lts-kernel/wiki/5.4-kernel-patches-(WIP)
tests cases for ampere-lts-kernel: https://github.com/AmpereComputing/ampere-lts-kernel/tree/main/tests