reproduce (this is a W=1 build):
        git checkout 7fd2df204f342fc17d1a0bfcd474b24232fb0f32
        b4 shazam https://lore.kernel.org/r/20260505-mathieu-nvmem-fixed-layout-v1-1-7f6ecbce108d@bootlin.com
        # apt-get install llvm-dev

        # save the config file
        make W=1 ARCH=i386 olddefconfig
        make W=1 ARCH=i386 
        make W=1 headers_install
        make W=1 -C tools/testing/selftests