[linux-stable-rc:linux-4.9.y 1180/2185] arch/powerpc/kernel/setup_64.c:739:6: error: no previous prototype for function 'entry_flush_enable'

[linux-stable-rc:linux-4.9.y 1180/2185] arch/powerpc/kernel/setup_64.c:739:6: error: no previous prototype for function 'entry_flush_enable'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y
head:   073633cdd92bb5dd4ff42f8f0f4b5959fde050e7
commit: fa4bf9f38184ed7ca4916eb64f8c767d1e279c1f [1180/2185] powerpc/64s: flush L1D on kernel entry
config: powerpc64-randconfig-r032-20210407 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c060945b23a1c54d4b2a053ff4b093a2277b303d)
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 powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=fa4bf9f38184ed7ca4916eb64f8c767d1e279c1f
        git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
        git fetch --no-tags linux-stable-rc linux-4.9.y
        git checkout fa4bf9f38184ed7ca4916eb64f8c767d1e279c1f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 

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

Note: the linux-stable-rc/linux-4.9.y HEAD 073633cdd92bb5dd4ff42f8f0f4b5959fde050e7 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/setup_64.c:281:13: error: no previous prototype for function 'early_setup' [-Werror,-Wmissing-prototypes]
   void __init early_setup(unsigned long dt_ptr)
               ^
   arch/powerpc/kernel/setup_64.c:281:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init early_setup(unsigned long dt_ptr)
   ^
   static 
   arch/powerpc/kernel/setup_64.c:421:13: error: no previous prototype for function 'initialize_cache_info' [-Werror,-Wmissing-prototypes]
   void __init initialize_cache_info(void)
               ^
   arch/powerpc/kernel/setup_64.c:421:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init initialize_cache_info(void)
   ^
   static 
   arch/powerpc/kernel/setup_64.c:514:13: error: no previous prototype for function 'irqstack_early_init' [-Werror,-Wmissing-prototypes]
   void __init irqstack_early_init(void)
               ^
   arch/powerpc/kernel/setup_64.c:514:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init irqstack_early_init(void)
   ^
   static 
   arch/powerpc/kernel/setup_64.c:563:13: error: no previous prototype for function 'emergency_stack_init' [-Werror,-Wmissing-prototypes]
   void __init emergency_stack_init(void)
               ^
   arch/powerpc/kernel/setup_64.c:563:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init emergency_stack_init(void)
   ^
   static 
>> arch/powerpc/kernel/setup_64.c:739:6: error: no previous prototype for function 'entry_flush_enable' [-Werror,-Wmissing-prototypes]
   void entry_flush_enable(bool enable)
        ^
   arch/powerpc/kernel/setup_64.c:739:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void entry_flush_enable(bool enable)
   ^
   static 
   5 errors generated.


vim +/entry_flush_enable +739 arch/powerpc/kernel/setup_64.c

   738	
 > 739	void entry_flush_enable(bool enable)
   740	{
   741		if (enable) {
   742			do_entry_flush_fixups(enabled_flush_types);
   743			on_each_cpu(do_nothing, NULL, 1);
   744		} else {
   745			do_entry_flush_fixups(L1D_FLUSH_NONE);
   746		}
   747	
   748		entry_flush = enable;
   749	}
   750	

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

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