tree: https://github.com/c-sky/csky-linux linux-next head: 8d1733b612c9576ec3ff96491cffcb40ad756c1c commit: 8d1733b612c9576ec3ff96491cffcb40ad756c1c [27/27] csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO config: csky-defconfig (attached as .config) compiler: csky-linux-gcc (GCC) 9.3.0 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/c-sky/csky-linux/commit/8d1733b612c9576ec3ff96491cffcb... git remote add csky-linux https://github.com/c-sky/csky-linux git fetch --no-tags csky-linux linux-next git checkout 8d1733b612c9576ec3ff96491cffcb40ad756c1c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 6 | int __vdso_clock_gettime(clockid_t clock, | ^~~~~~~~~~~~~~~~~~~~ 12 | int __vdso_clock_gettime64(clockid_t clock, | ^~~~~~~~~~~~~~~~~~~~~~ 18 | int __vdso_gettimeofday(struct __kernel_old_timeval *tv, | ^~~~~~~~~~~~~~~~~~~ 24 | int __vdso_clock_getres(clockid_t clock_id, | ^~~~~~~~~~~~~~~~~~~ vim +/__vdso_clock_gettime +6 arch/csky/kernel/vdso/vgettimeofday.c 5 7 struct old_timespec32 *ts) 8 { 9 return __cvdso_clock_gettime32(clock, ts); 10 } 11 13 struct __kernel_timespec *ts) 14 { 15 return __cvdso_clock_gettime(clock, ts); 16 } 17 19 struct timezone *tz) 20 { 21 return __cvdso_gettimeofday(tv, tz); 22 } 23 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org