[s390:features 6/6] arch/s390/kernel/vdso64/vdso64_generic.c:4:5: warning: no previous prototype for '__s390_vdso_gettimeofday'

[kernel test robot <lkp@xxxxxxxxx>]

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-allyesconfig (attached as .config)
compiler: s390-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
        git checkout 4bff8cb5450287e246d365b719148b2d9364c292
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 '__s390_vdso_gettimeofday' [-Wmissing-prototypes]
       4 | int __s390_vdso_gettimeofday(struct __kernel_old_timeval *tv,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~
>> arch/s390/kernel/vdso64/vdso64_generic.c:10:5: warning: no previous prototype for '__s390_vdso_clock_gettime' [-Wmissing-prototypes]
      10 | int __s390_vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/s390/kernel/vdso64/vdso64_generic.c:15:5: warning: no previous prototype for '__s390_vdso_clock_getres' [-Wmissing-prototypes]
      15 | int __s390_vdso_clock_getres(clockid_t clock, struct __kernel_timespec *ts)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~

# 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

Attachment: .config.gz
Description: application/gzip