reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git/commit/?id=69cad6a5b5543737a73e8a9dcd366cbf2fbef9ff
        git remote add gustavoars https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git
        git fetch --no-tags gustavoars testing/wfamnae-next20251210
        git checkout 69cad6a5b5543737a73e8a9dcd366cbf2fbef9ff

        # 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 kernel/bpf/