TO: Vincent Chen <vincent.chen(a)sifive.com&gt; CC: Palmer Dabbelt <palmerdabbelt(a)google.com&gt; CC: Atish Patra <atish.patra(a)wdc.com&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next head: 5cc38fa6fc7448d40ff214d5c087f508355e8446 commit: 6e3cfcf6ea031fe2a0068fa7c380c4cf7bcd8936 [2/11] riscv: use vDSO common flow to reduce the latency of the time-related functions config: riscv-randconfig-r011-20200612 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3b43f006294971b8049d4807110032169780e5b8) 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 # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu git checkout 6e3cfcf6ea031fe2a0068fa7c380c4cf7bcd8936 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ^ arch/riscv/kernel/vdso/vgettimeofday.c:12:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ^ static int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) ^ arch/riscv/kernel/vdso/vgettimeofday.c:17:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) ^ static int __vdso_clock_getres(clockid_t clock_id, struct __kernel_timespec *res) ^ arch/riscv/kernel/vdso/vgettimeofday.c:22:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __vdso_clock_getres(clockid_t clock_id, struct __kernel_timespec *res) ^ static 3 warnings generated. -- clang-11: warning: argument unused during compilation: '-pg' [-Wunused-command-line-argument] clang-11: warning: argument unused during compilation: '-no-pie' [-Wunused-command-line-argument] /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vgettimeofday.o: relocation R_RISCV_HI20 against `a local symbol' can not be used when making a shared object; recompile with -fPIC /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vdso.so.dbg.tmp: section .text lma 0x800 adjusted to 0x824 /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vdso.so.dbg.tmp: section .rodata lma 0x840 adjusted to 0x1d74 /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vdso.so.dbg.tmp: section .data lma 0x1d50 adjusted to 0x20b4 /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vdso.so.dbg.tmp: section _ftrace_annotated_branch lma 0x1f60 adjusted to 0x22c4 /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vdso.so.dbg.tmp: section _ftrace_branch lma 0x21a0 adjusted to 0x2504 /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vdso.so.dbg.tmp: section .init_array.1 lma 0x2288 adjusted to 0x25ec /usr/bin/riscv64-linux-gnu-ld: arch/riscv/kernel/vdso/vdso.so.dbg.tmp: section .fini_array.1 lma 0x2290 adjusted to 0x25f4 vim +/__vdso_clock_gettime +12 arch/riscv/kernel/vdso/vgettimeofday.c 11 13 { 14 return __cvdso_clock_gettime(clock, ts); 15 } 16 18 { 19 return __cvdso_gettimeofday(tv, tz); 20 } 21 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org