reproduce (this is a W=1 build):
        git remote add hid https://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git
        git fetch hid for-next
        git checkout hid/for-next
        b4 shazam https://lore.kernel.org/r/ZnB9X1Jj6c04ufC0@sirena.org.uk
        # 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/hid/bpf/