[arm-platforms:hack/arm64-early-cpufeature 12/18] arch/arm64/kernel/idreg-override.c:97:13: warning: no previous prototype for 'init_shadow_regs'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git hack/arm64-early-cpufeature
head:   c78a06f2038a2d430effe8507a9da0477558954b
commit: 7947fab3bb9e4a186581a142fc1c1a550bc3f08e [12/18] arm64: cpufeature: Add an early command-line cpufeature override facility
config: arm64-randconfig-r015-20201228 (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
        # https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/commit/?id=7947fab3bb9e4a186581a142fc1c1a550bc3f08e
        git remote add arm-platforms https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git
        git fetch --no-tags arm-platforms hack/arm64-early-cpufeature
        git checkout 7947fab3bb9e4a186581a142fc1c1a550bc3f08e
        # 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 at intel.com>

All warnings (new ones prefixed by >>):

>> arch/arm64/kernel/idreg-override.c:97:13: warning: no previous prototype for 'init_shadow_regs' [-Wmissing-prototypes]
      97 | void __init init_shadow_regs(void)
         |             ^~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for SND_SOC_MT6359
   Depends on SOUND && !UML && SND && SND_SOC && MTK_PMIC_WRAP
   Selected by
   - SND_SOC_MT8192_MT6359_RT1015_RT5682 && SOUND && !UML && SND && SND_SOC && I2C && SND_SOC_MT8192


vim +/init_shadow_regs +97 arch/arm64/kernel/idreg-override.c

    96	
  > 97	void __init init_shadow_regs(void)

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