tree: https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features head: 4bff8cb5450287e246d365b719148b2d9364c292 commit: 4bff8cb5450287e246d365b719148b2d9364c292 [6/6] s390: convert to GENERIC_VDSO config: s390-randconfig-r005-20200902 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1284dc34abd11ce4275ad21c0470ad8c679b59b7) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu git checkout 4bff8cb5450287e246d365b719148b2d9364c292 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/s390/kernel/vdso64/vdso64_generic.c:4:5: warning: no previous prototype for function '__s390_vdso_gettimeofday' [-Wmissing-prototypes] int __s390_vdso_gettimeofday(struct __kernel_old_timeval *tv, ^ arch/s390/kernel/vdso64/vdso64_generic.c:4:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __s390_vdso_gettimeofday(struct __kernel_old_timeval *tv, ^ static >> arch/s390/kernel/vdso64/vdso64_generic.c:10:5: warning: no previous prototype for function '__s390_vdso_clock_gettime' [-Wmissing-prototypes] int __s390_vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ^ arch/s390/kernel/vdso64/vdso64_generic.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __s390_vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) ^ static >> arch/s390/kernel/vdso64/vdso64_generic.c:15:5: warning: no previous prototype for function '__s390_vdso_clock_getres' [-Wmissing-prototypes] int __s390_vdso_clock_getres(clockid_t clock, struct __kernel_timespec *ts) ^ arch/s390/kernel/vdso64/vdso64_generic.c:15:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __s390_vdso_clock_getres(clockid_t clock, struct __kernel_timespec *ts) ^ static 3 warnings generated. # https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?id=4bff8cb5450287e246d365b719148b2d9364c292 git remote add s390 https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git git fetch --no-tags s390 features git checkout 4bff8cb5450287e246d365b719148b2d9364c292 vim +/__s390_vdso_gettimeofday +4 arch/s390/kernel/vdso64/vdso64_generic.c 3 > 4 int __s390_vdso_gettimeofday(struct __kernel_old_timeval *tv, 5 struct timezone *tz) 6 { 7 return __cvdso_gettimeofday(tv, tz); 8 } 9 > 10 int __s390_vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts) 11 { 12 return __cvdso_clock_gettime(clock, ts); 13 } 14 > 15 int __s390_vdso_clock_getres(clockid_t clock, struct __kernel_timespec *ts) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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