Worked on the geerlingguy/linux repository to address a concurrency issue in the DRM Xe subsystem, focusing on kernel development and device driver reliability. Delivered a targeted fix for a race condition in the xe_sync driver by reordering ufence signaling, ensuring the fence is marked signalled before the memory write occurs. This approach prevented -EBUSY errors during map and unmap operations, allowing userspace to safely reuse ufences without synchronization issues. The solution demonstrated proficiency in C and deep understanding of kernel-level concurrency, contributing to improved subsystem stability and safer memory management within the Linux graphics stack during the development period.