[broonie-misc:arm64-vdso 4/5] arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu'

[broonie-misc:arm64-vdso 4/5] arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git arm64-vdso
head:   6b510319fdb2cc4136a47319f6c5e88195b4bcf0
commit: fdf2f42836c8f11889209ddd41450f6d7d0944e3 [4/5] arm64: vdso: Add getcpu() implementation
config: arm64-randconfig-r006-20200819 (attached as .config)
compiler: aarch64-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 fdf2f42836c8f11889209ddd41450f6d7d0944e3
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu' [-Wmissing-prototypes]
      33 | int __kernel_getcpu(unsigned int *cpu, unsigned int *node,
         |     ^~~~~~~~~~~~~~~
--
   arch/arm64/kernel/vdso/vgettimeofday.c:9:5: warning: no previous prototype for '__kernel_clock_gettime' [-Wmissing-prototypes]
       9 | int __kernel_clock_gettime(clockid_t clock,
         |     ^~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kernel/vdso/vgettimeofday.c:15:5: warning: no previous prototype for '__kernel_gettimeofday' [-Wmissing-prototypes]
      15 | int __kernel_gettimeofday(struct __kernel_old_timeval *tv,
         |     ^~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kernel/vdso/vgettimeofday.c:21:5: warning: no previous prototype for '__kernel_clock_getres' [-Wmissing-prototypes]
      21 | int __kernel_clock_getres(clockid_t clock_id,
         |     ^~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu' [-Wmissing-prototypes]
      33 | int __kernel_getcpu(unsigned int *cpu, unsigned int *node,
         |     ^~~~~~~~~~~~~~~

# https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git/commit/?id=fdf2f42836c8f11889209ddd41450f6d7d0944e3
git remote add broonie-misc https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git
git fetch --no-tags broonie-misc arm64-vdso
git checkout fdf2f42836c8f11889209ddd41450f6d7d0944e3
vim +/__kernel_getcpu +33 arch/arm64/kernel/vdso/vgetcpu.c

    32	
  > 33	int __kernel_getcpu(unsigned int *cpu, unsigned int *node,

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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Re: [broonie-misc:arm64-vdso 4/5] arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu'

[Mark Brown]

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On Thu, Aug 20, 2020 at 02:22:28AM +0800, kernel test robot wrote:

> >> arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu' [-Wmissing-prototypes]
>       33 | int __kernel_getcpu(unsigned int *cpu, unsigned int *node,
>          |     ^~~~~~~~~~~~~~~
> --
>    arch/arm64/kernel/vdso/vgettimeofday.c:9:5: warning: no previous prototype for '__kernel_clock_gettime' [-Wmissing-prototypes]

Again this looks like a false positive with the new code matching the
existing code.

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Re: [broonie-misc:arm64-vdso 4/5] arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu'

[Chen, Rong A]

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On 8/20/2020 2:26 AM, Mark Brown wrote:
> On Thu, Aug 20, 2020 at 02:22:28AM +0800, kernel test robot wrote:
>
>>>> arch/arm64/kernel/vdso/vgetcpu.c:33:5: warning: no previous prototype for '__kernel_getcpu' [-Wmissing-prototypes]
>>        33 | int __kernel_getcpu(unsigned int *cpu, unsigned int *node,
>>           |     ^~~~~~~~~~~~~~~
>> --
>>     arch/arm64/kernel/vdso/vgettimeofday.c:9:5: warning: no previous prototype for '__kernel_clock_gettime' [-Wmissing-prototypes]
> Again this looks like a false positive with the new code matching the
> existing code.

Hi Mark,

Sorry for the inconvenience, we'll take a look at what happened on this 
case.

Best Regards,
Rong Chen