reproduce: git clone https://github.com/intel/lkp-tests.git ~/lkp-tests # apt-get install sparse # sparse version: v0.6.4-66-g0196afe1 # https://github.com/intel-lab-lkp/linux/commit/c34a0f1db55d1d4129776ae5b77eaed7b8d19c2d git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Yunhui-Cui/RISC-V-Enable-cbo-clean-flush-in-usermode/20250115-104456 git checkout c34a0f1db55d1d4129776ae5b77eaed7b8d19c2d # save the config file mkdir build_dir && cp config build_dir/.config ~/lkp-tests/kbuild/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__ -fmax-errors=unlimited -fmax-warnings=unlimited' O=build_dir ARCH=riscv olddefconfig ~/lkp-tests/kbuild/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__ -fmax-errors=unlimited -fmax-warnings=unlimited' O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/