[renesas-drivers:topic/renesas-debug 12/20] drivers/soc/renesas/r8a77990-mstp.c:544:13: warning: no previous prototype for function 'r8a77990_disable_mstp_clocks'

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git topic/renesas-debug
head:   19a13e050f789ac7d98a4b3320a376f5052e84a0
commit: cff4ebb63f314f3c191a893b8bfce4877b5b1572 [12/20] [DEBUG] soc: renesas: r8a77990: MSTP debug handling
config: arm64-randconfig-r034-20210112 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?id=cff4ebb63f314f3c191a893b8bfce4877b5b1572
        git remote add renesas-drivers https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git
        git fetch --no-tags renesas-drivers topic/renesas-debug
        git checkout cff4ebb63f314f3c191a893b8bfce4877b5b1572
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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 >>):

>> drivers/soc/renesas/r8a77990-mstp.c:544:13: warning: no previous prototype for function 'r8a77990_disable_mstp_clocks' [-Wmissing-prototypes]
   void __init r8a77990_disable_mstp_clocks(void)
               ^
   drivers/soc/renesas/r8a77990-mstp.c:544:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init r8a77990_disable_mstp_clocks(void)
   ^
   static 
   1 warning generated.
   /usr/bin/as: unrecognized option '-EB'
   clang-12: error: assembler command failed with exit code 1 (use -v to see invocation)


vim +/r8a77990_disable_mstp_clocks +544 drivers/soc/renesas/r8a77990-mstp.c

   543	
 > 544	void __init r8a77990_disable_mstp_clocks(void)

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

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