reproduce (this is a W=1 build): git clone https://github.com/intel/lkp-tests.git ~/lkp-tests git remote add herbert-cryptodev-2.6 https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git git fetch herbert-cryptodev-2.6 master git checkout herbert-cryptodev-2.6/master b4 shazam https://lore.kernel.org/r/20240515150213.32491-1-jarkko@kernel.org # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash crypto/