Cynthia worked on the geerlingguy/linux repository to address cross-architecture compatibility issues in futex selftests, focusing on 32-bit systems using 64-bit time_t. She implemented a patch in C that conditionally defines SYS_futex as SYS_futex_time64 when the former is unavailable, ensuring that selftests compile successfully on architectures lacking SYS_futex. This targeted bug fix improved build reliability and continuous integration coverage for legacy environments. Cynthia applied her skills in kernel development, system programming, and testing to reduce manual debugging for downstream users. Her work demonstrated a deep understanding of low-level system interfaces and contributed to more robust kernel selftest infrastructure.