Released earlier this year in January, the Linux 5.5 kernel series introduced some interesting new features, such as full support for the latest Raspberry Pi 4 models, better Wi-Fi connectivity, SMB multichannel support, and support for using CIFS as root file system. It also brought improvements to the Berkeley Packet Filter (BPF), cross device offloaded copy for NFS clients, the ability to add alternative names to network interfaces, as well as KUnit, a new unit testing framework for the Linux kernel.