reproduce (this is a W=1 build):
        git checkout 22f20375f5b71f30c0d6896583b93b6e4bba7279
        b4 shazam https://lore.kernel.org/r/20250922-i2c-mux-v1-3-28c94a610930@gmail.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/i2c/