reproduce (this is a W=1 build): git clone https://github.com/intel/lkp-tests.git ~/lkp-tests # https://github.com/ambarus/linux-0day/commit/e92862fb09390e4aae4e76ef2e5528c0340e31d0 git remote add ambarus https://github.com/ambarus/linux-0day git fetch --no-tags ambarus gs101-peric0-usi-uart-i2c-v3 git checkout e92862fb09390e4aae4e76ef2e5528c0340e31d0 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/tty/serial/