reproduce (this is a W=1 build):
        git checkout c75962170e49f24399141276ae119e6a879f36dc
        b4 shazam https://lore.kernel.org/r/20240517-a2b-v1-4-b8647554c67b@bang-olufsen.dk
        # 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/a2b/