[amir73il:mnt_idmap_prot 29/29] fs/mnt_idmapping.c:20:19: warning: no previous prototype for 'fsnotify_conn_mnt_idmap'

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

tree:   https://github.com/amir73il/linux mnt_idmap_prot
head:   8e70eb8a651b98677105e34ded526227e7afb4a8
commit: 8f4005a5f79055586a56c4bd677e49a6876ac7f6 [29/29] fs: add support for "protected" attribute on a mount
config: m68k-randconfig-r001-20230607 (https://download.01.org/0day-ci/archive/20230608/202306080249.RdiRafZr-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/amir73il/linux/commit/8f4005a5f79055586a56c4bd677e49a6876ac7f6
        git remote add amir73il https://github.com/amir73il/linux
        git fetch --no-tags amir73il mnt_idmap_prot
        git checkout 8f4005a5f79055586a56c4bd677e49a6876ac7f6
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306080249.RdiRafZr-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/mnt_idmapping.c:20:19: warning: no previous prototype for 'fsnotify_conn_mnt_idmap' [-Wmissing-prototypes]
      20 | struct mnt_idmap *fsnotify_conn_mnt_idmap(struct fsnotify_mark_connector *conn)
         |                   ^~~~~~~~~~~~~~~~~~~~~~~


vim +/fsnotify_conn_mnt_idmap +20 fs/mnt_idmapping.c

    19	
  > 20	struct mnt_idmap *fsnotify_conn_mnt_idmap(struct fsnotify_mark_connector *conn)
    21	{
    22		return container_of(conn->obj, struct mnt_idmap, fsnotify_marks);
    23	}
    24	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki