[linux-next:master 10881/13550] include/soc/microchip/mpfs.h:49:29: warning: no previous prototype for function 'mpfs_sys_controller_get'

[kernel test robot <lkp@xxxxxxxxx>]

Hi Conor,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   8702f95941c215501826ea8743a8b64b83479209
commit: de5473936808627fa98c3d2e8e3fa3076338f601 [10881/13550] mbox: add polarfire soc system controller mailbox
config: x86_64-randconfig-r015-20210625 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9ca0171a9ffdef5fdb1511d197a3fd72490362de)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=de5473936808627fa98c3d2e8e3fa3076338f601
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout de5473936808627fa98c3d2e8e3fa3076338f601
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

   In file included from drivers/mailbox/mailbox-mpfs.c:19:
>> include/soc/microchip/mpfs.h:49:29: warning: no previous prototype for function 'mpfs_sys_controller_get' [-Wmissing-prototypes]
   struct mpfs_sys_controller *mpfs_sys_controller_get(struct device_node *mailbox_node)
                               ^
   include/soc/microchip/mpfs.h:49:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct mpfs_sys_controller *mpfs_sys_controller_get(struct device_node *mailbox_node)
   ^
   static 
   include/soc/microchip/mpfs.h:43:12: warning: unused function 'mpfs_blocking_transaction' [-Wunused-function]
   static int mpfs_blocking_transaction(struct mpfs_sys_controller *mpfs_client, void *msg,
              ^
   2 warnings generated.


vim +/mpfs_sys_controller_get +49 include/soc/microchip/mpfs.h

    48	
  > 49	struct mpfs_sys_controller *mpfs_sys_controller_get(struct device_node *mailbox_node)
    50	{
    51		return NULL;
    52	}
    53	

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

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