让kselftest支持nommu平台 · v3

The kselftest runner currently uses cd - to restore its working directory after running a test. This is not supported by the minimal BusyBox hush shell used by some NOMMU targets. Store the origina

Architectures lacks MMU doesn’t support fork(2) syscall and only vfork(2) is available with limitations. Thus, we cannot run kselftest on nommu architecture as is. This commit addresses this issue w

Introduce a kselftest utility to validate memory mapping capabilities under nommu kernels, aligned with Documentation/admin-guide/mm/nommu-mmap.rst. The test implements basic checks into a generic ar