[chenhuacai-loongson:loongarch-next 7/8] arch/loongarch/vdso/vgetcpu.c:27:5: warning: no previous prototype for '__vdso_getcpu'

[chenhuacai-loongson:loongarch-next 7/8] arch/loongarch/vdso/vgetcpu.c:27:5: warning: no previous prototype for '__vdso_getcpu'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git loongarch-next
head:   2c25940dedb153b88fdd06c41bcfa78040383fbf
commit: b25f1337fbb7fa52c5da21c7a829c0f9a488026c [7/8] LoongArch: Add vDSO syscall __vdso_getcpu()
config: loongarch-randconfig-r015-20220805 (https://download.01.org/0day-ci/archive/20220806/202208061729.Fvk2QdaS-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git/commit/?id=b25f1337fbb7fa52c5da21c7a829c0f9a488026c
        git remote add chenhuacai-loongson https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git
        git fetch --no-tags chenhuacai-loongson loongarch-next
        git checkout b25f1337fbb7fa52c5da21c7a829c0f9a488026c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch prepare

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

All warnings (new ones prefixed by >>):

>> arch/loongarch/vdso/vgetcpu.c:27:5: warning: no previous prototype for '__vdso_getcpu' [-Wmissing-prototypes]
      27 | int __vdso_getcpu(unsigned int *cpu, unsigned int *node, struct getcpu_cache *unused)
         |     ^~~~~~~~~~~~~
--
   arch/loongarch/kernel/asm-offsets.c:16:6: warning: no previous prototype for 'output_ptreg_defines' [-Wmissing-prototypes]
      16 | void output_ptreg_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:63:6: warning: no previous prototype for 'output_task_defines' [-Wmissing-prototypes]
      63 | void output_task_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:75:6: warning: no previous prototype for 'output_thread_info_defines' [-Wmissing-prototypes]
      75 | void output_thread_info_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:91:6: warning: no previous prototype for 'output_thread_defines' [-Wmissing-prototypes]
      91 | void output_thread_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:132:6: warning: no previous prototype for 'output_thread_fpu_defines' [-Wmissing-prototypes]
     132 | void output_thread_fpu_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:172:6: warning: no previous prototype for 'output_mm_defines' [-Wmissing-prototypes]
     172 | void output_mm_defines(void)
         |      ^~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:210:6: warning: no previous prototype for 'output_sc_defines' [-Wmissing-prototypes]
     210 | void output_sc_defines(void)
         |      ^~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:218:6: warning: no previous prototype for 'output_signal_defines' [-Wmissing-prototypes]
     218 | void output_signal_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~~
   arch/loongarch/kernel/asm-offsets.c:256:6: warning: no previous prototype for 'output_smpboot_defines' [-Wmissing-prototypes]
     256 | void output_smpboot_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~
   <stdin>:569:2: warning: #warning syscall fstat not implemented [-Wcpp]
   arch/loongarch/vdso/vgettimeofday.c:9:5: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
       9 | int __vdso_clock_gettime(clockid_t clock,
         |     ^~~~~~~~~~~~~~~~~~~~
   arch/loongarch/vdso/vgettimeofday.c:15:5: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
      15 | int __vdso_gettimeofday(struct __kernel_old_timeval *tv,
         |     ^~~~~~~~~~~~~~~~~~~
   arch/loongarch/vdso/vgettimeofday.c:21:5: warning: no previous prototype for '__vdso_clock_getres' [-Wmissing-prototypes]
      21 | int __vdso_clock_getres(clockid_t clock_id,
         |     ^~~~~~~~~~~~~~~~~~~
>> arch/loongarch/vdso/vgetcpu.c:27:5: warning: no previous prototype for '__vdso_getcpu' [-Wmissing-prototypes]
      27 | int __vdso_getcpu(unsigned int *cpu, unsigned int *node, struct getcpu_cache *unused)
         |     ^~~~~~~~~~~~~


vim +/__vdso_getcpu +27 arch/loongarch/vdso/vgetcpu.c

    26	
  > 27	int __vdso_getcpu(unsigned int *cpu, unsigned int *node, struct getcpu_cache *unused)

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