reproduce (this is a W=1 build): # https://github.com/norov/linux/commit/2dc86881c56e6ed3f0b9640c3a402631aaeca482 git remote add norov https://github.com/norov/linux git fetch --no-tags norov compat_get_cpumask git checkout 2dc86881c56e6ed3f0b9640c3a402631aaeca482 # 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 io_uring/ lib/