Joe Wang focused on stabilizing GFX12 memory management in the linux-riscv/linux repository by repairing the GPU Page Table Entry flag logic. He restored the AMDGPU_PTE_PRT_GFX12 flag in the PTE generation path after a rework, ensuring correct PTE handling for GFX12 hardware. Using C programming and kernel development skills, Joe implemented and verified a targeted patch in the drm/amdgpu subsystem. This work improved memory management and GPU performance for graphics workloads. Although the contribution was limited to a single bug fix over one month, the patch addressed a nuanced kernel driver issue and contributed to overall system stability and performance.