linux-kselftest-5.4-rc1 This Kselftest update for Linux 5.4-rc1 consists of several fixes to existing tests and adds KUnit, a lightweight unit testing and mocking framework for the Linux kernel from Brendan Higgins. KUnit is not an end-to-end testing framework. It is currently supported on UML and sub-systems can write unit tests and run them in UML env. KUnit documentation is included in this update. In the future KUnit will be linked to Kselftest framework to provide a way to trigger KUnit tests from user-space.