[cxl:preview 38/49] include/linux/memregion.h:19:6: warning: no previous prototype for function 'memregion_free'

[cxl:preview 38/49] include/linux/memregion.h:19:6: warning: no previous prototype for function 'memregion_free'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git preview
head:   b2d4fd5c97b59f622e6c45ac51020cdcd66bb022
commit: e4b2a6ac46c3288f73b88e0aa69afd2a815930d7 [38/49] cxl/region: Add region creation support
config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220623/202206231541.NNhh1JGy-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 46be5faaf03466c3751f8a2882bef5a217e15926)
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/cxl/cxl.git/commit/?id=e4b2a6ac46c3288f73b88e0aa69afd2a815930d7
        git remote add cxl https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git
        git fetch --no-tags cxl preview
        git checkout e4b2a6ac46c3288f73b88e0aa69afd2a815930d7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/cxl/core/

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 >>):

   In file included from drivers/cxl/core/port.c:4:
>> include/linux/memregion.h:19:6: warning: no previous prototype for function 'memregion_free' [-Wmissing-prototypes]
   void memregion_free(int id)
        ^
   include/linux/memregion.h:19:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void memregion_free(int id)
   ^
   static 
   1 warning generated.


vim +/memregion_free +19 include/linux/memregion.h

a6c7f4c6aea5f4 Dan Williams 2019-11-06  10  
33dd70752cd76f Dan Williams 2019-11-06  11  #ifdef CONFIG_MEMREGION
33dd70752cd76f Dan Williams 2019-11-06  12  int memregion_alloc(gfp_t gfp);
33dd70752cd76f Dan Williams 2019-11-06  13  void memregion_free(int id);
33dd70752cd76f Dan Williams 2019-11-06  14  #else
33dd70752cd76f Dan Williams 2019-11-06  15  static inline int memregion_alloc(gfp_t gfp)
33dd70752cd76f Dan Williams 2019-11-06  16  {
33dd70752cd76f Dan Williams 2019-11-06  17  	return -ENOMEM;
33dd70752cd76f Dan Williams 2019-11-06  18  }
33dd70752cd76f Dan Williams 2019-11-06 @19  void memregion_free(int id)

:::::: The code at line 19 was first introduced by commit
:::::: 33dd70752cd76f4d883a165a674f13121a4155ed lib: Uplevel the pmem "region" ida to a global allocator

:::::: TO: Dan Williams <dan.j.williams@intel.com>
:::::: CC: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

-- 
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https://01.org/lkp