tree: https://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux.git for-next head: fde9c59aebafb91caeed816cc510b56f14aa63ae commit: fde9c59aebafb91caeed816cc510b56f14aa63ae [18/18] riscv: explicitly use symbol offsets for VDSO config: riscv-randconfig-r034-20210825 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project ea08c4cd1c0869ec5024a8bb3f5cdf06ab03ae83) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux.git/commit/?id=fde9c59aebafb91caeed816cc510b56f14aa63ae git remote add palmer https://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux.git git fetch --no-tags palmer for-next git checkout fde9c59aebafb91caeed816cc510b56f14aa63ae # 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 All errors (new ones prefixed by >>): >> arch/riscv/kernel/vdso/vgettimeofday.c:16:9: error: implicit declaration of function '__cvdso_clock_gettime' [-Werror,-Wimplicit-function-declaration] return __cvdso_clock_gettime(clock, ts); ^ arch/riscv/kernel/vdso/vgettimeofday.c:16:9: note: did you mean '__vdso_clock_gettime'? arch/riscv/kernel/vdso/vgettimeofday.c:14:5: note: '__vdso_clock_gettime' declared here int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ^ >> arch/riscv/kernel/vdso/vgettimeofday.c:23:9: error: implicit declaration of function '__cvdso_gettimeofday' [-Werror,-Wimplicit-function-declaration] return __cvdso_gettimeofday(tv, tz); ^ arch/riscv/kernel/vdso/vgettimeofday.c:23:9: note: did you mean '__vdso_gettimeofday'? arch/riscv/kernel/vdso/vgettimeofday.c:21:5: note: '__vdso_gettimeofday' declared here int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) ^ >> arch/riscv/kernel/vdso/vgettimeofday.c:30:9: error: implicit declaration of function '__cvdso_clock_getres' [-Werror,-Wimplicit-function-declaration] return __cvdso_clock_getres(clock_id, res); ^ arch/riscv/kernel/vdso/vgettimeofday.c:30:9: note: did you mean '__vdso_clock_getres'? arch/riscv/kernel/vdso/vgettimeofday.c:28:5: note: '__vdso_clock_getres' declared here int __vdso_clock_getres(clockid_t clock_id, struct __kernel_timespec *res) ^ 3 errors generated. -- >> arch/riscv/kernel/vdso/vgettimeofday.c:16:9: error: implicit declaration of function '__cvdso_clock_gettime' [-Werror,-Wimplicit-function-declaration] return __cvdso_clock_gettime(clock, ts); ^ arch/riscv/kernel/vdso/vgettimeofday.c:16:9: note: did you mean '__vdso_clock_gettime'? arch/riscv/kernel/vdso/vgettimeofday.c:14:5: note: '__vdso_clock_gettime' declared here int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ^ >> arch/riscv/kernel/vdso/vgettimeofday.c:23:9: error: implicit declaration of function '__cvdso_gettimeofday' [-Werror,-Wimplicit-function-declaration] return __cvdso_gettimeofday(tv, tz); ^ arch/riscv/kernel/vdso/vgettimeofday.c:23:9: note: did you mean '__vdso_gettimeofday'? arch/riscv/kernel/vdso/vgettimeofday.c:21:5: note: '__vdso_gettimeofday' declared here int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) ^ >> arch/riscv/kernel/vdso/vgettimeofday.c:30:9: error: implicit declaration of function '__cvdso_clock_getres' [-Werror,-Wimplicit-function-declaration] return __cvdso_clock_getres(clock_id, res); ^ arch/riscv/kernel/vdso/vgettimeofday.c:30:9: note: did you mean '__vdso_clock_getres'? arch/riscv/kernel/vdso/vgettimeofday.c:28:5: note: '__vdso_clock_getres' declared here int __vdso_clock_getres(clockid_t clock_id, struct __kernel_timespec *res) ^ 3 errors generated. make[2]: *** [scripts/Makefile.build:271: arch/riscv/kernel/vdso/vgettimeofday.o] Error 1 make[2]: Target 'include/generated/vdso-offsets.h' not remade because of errors. make[1]: *** [arch/riscv/Makefile:113: vdso_prepare] Error 2 make[1]: Target 'modules_prepare' not remade because of errors. make: *** [Makefile:220: __sub-make] Error 2 make: Target 'modules_prepare' not remade because of errors. -- >> arch/riscv/kernel/vdso/vgettimeofday.c:16:9: error: implicit declaration of function '__cvdso_clock_gettime' [-Werror,-Wimplicit-function-declaration] return __cvdso_clock_gettime(clock, ts); ^ arch/riscv/kernel/vdso/vgettimeofday.c:16:9: note: did you mean '__vdso_clock_gettime'? arch/riscv/kernel/vdso/vgettimeofday.c:14:5: note: '__vdso_clock_gettime' declared here int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ^ >> arch/riscv/kernel/vdso/vgettimeofday.c:23:9: error: implicit declaration of function '__cvdso_gettimeofday' [-Werror,-Wimplicit-function-declaration] return __cvdso_gettimeofday(tv, tz); ^ arch/riscv/kernel/vdso/vgettimeofday.c:23:9: note: did you mean '__vdso_gettimeofday'? arch/riscv/kernel/vdso/vgettimeofday.c:21:5: note: '__vdso_gettimeofday' declared here int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) ^ >> arch/riscv/kernel/vdso/vgettimeofday.c:30:9: error: implicit declaration of function '__cvdso_clock_getres' [-Werror,-Wimplicit-function-declaration] return __cvdso_clock_getres(clock_id, res); ^ arch/riscv/kernel/vdso/vgettimeofday.c:30:9: note: did you mean '__vdso_clock_getres'? arch/riscv/kernel/vdso/vgettimeofday.c:28:5: note: '__vdso_clock_getres' declared here int __vdso_clock_getres(clockid_t clock_id, struct __kernel_timespec *res) ^ 3 errors generated. make[2]: *** [scripts/Makefile.build:271: arch/riscv/kernel/vdso/vgettimeofday.o] Error 1 make[2]: Target 'include/generated/vdso-offsets.h' not remade because of errors. make[1]: *** [arch/riscv/Makefile:113: vdso_prepare] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:220: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/__cvdso_clock_gettime +16 arch/riscv/kernel/vdso/vgettimeofday.c ad5d1122b82fbd6 Vincent Chen 2020-06-09 11 e93b327dbf3d37f Vincent Chen 2020-06-23 12 extern e93b327dbf3d37f Vincent Chen 2020-06-23 13 int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts); ad5d1122b82fbd6 Vincent Chen 2020-06-09 14 int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ad5d1122b82fbd6 Vincent Chen 2020-06-09 15 { ad5d1122b82fbd6 Vincent Chen 2020-06-09 @16 return __cvdso_clock_gettime(clock, ts); ad5d1122b82fbd6 Vincent Chen 2020-06-09 17 } ad5d1122b82fbd6 Vincent Chen 2020-06-09 18 e93b327dbf3d37f Vincent Chen 2020-06-23 19 extern e93b327dbf3d37f Vincent Chen 2020-06-23 20 int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz); ad5d1122b82fbd6 Vincent Chen 2020-06-09 21 int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) ad5d1122b82fbd6 Vincent Chen 2020-06-09 22 { ad5d1122b82fbd6 Vincent Chen 2020-06-09 @23 return __cvdso_gettimeofday(tv, tz); ad5d1122b82fbd6 Vincent Chen 2020-06-09 24 } ad5d1122b82fbd6 Vincent Chen 2020-06-09 25 e93b327dbf3d37f Vincent Chen 2020-06-23 26 extern e93b327dbf3d37f Vincent Chen 2020-06-23 27 int __vdso_clock_getres(clockid_t clock_id, struct __kernel_timespec *res); ad5d1122b82fbd6 Vincent Chen 2020-06-09 28 int __vdso_clock_getres(clockid_t clock_id, struct __kernel_timespec *res) ad5d1122b82fbd6 Vincent Chen 2020-06-09 29 { ad5d1122b82fbd6 Vincent Chen 2020-06-09 @30 return __cvdso_clock_getres(clock_id, res); :::::: The code at line 16 was first introduced by commit :::::: ad5d1122b82fbd6a816d1b9d26ee01a6dbc2d757 riscv: use vDSO common flow to reduce the latency of the time-related functions :::::: TO: Vincent Chen :::::: CC: Palmer Dabbelt --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org