reproduce (this is a W=1 build): git remote add openeuler https://gitee.com/openeuler/kernel.git git fetch --no-tags openeuler openEuler-1.0-LTS git checkout 1c30433d9fa5c5b48039990ba214c0e8e199a22d # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/tty/serial/