reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add zohar-integrity https://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git
        git fetch zohar-integrity next-integrity
        git checkout zohar-integrity/next-integrity
        b4 shazam https://lore.kernel.org/r/20241127210234.121546-1-zohar@linux.ibm.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash