Hi Tong, Thank you for the patch! Yet something to improve: [auto build test ERROR on next-20210818] url: https://github.com/0day-ci/linux/commits/Tong-Tiangen/riscv-Fix-two-vdso-... base: f26c3abc432a2026ba9ee7767061a1f88aead6ec config: riscv-randconfig-r042-20210819 (attached as .config) compiler: riscv32-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/f2561fc9ba0ac1f90464a354588b26c5f... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tong-Tiangen/riscv-Fix-two-vdso-issue/20210819-105917 git checkout f2561fc9ba0ac1f90464a354588b26c5f99b2992 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=riscv SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org