[akpm-mm:mm-unstable 73/80] lib/maple_tree.c:6251:7: warning: no previous prototype for 'mas_find_range_rev'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   f96b65aa15baec616fffdb8f1d4fa3222aa56467
commit: 93bb3be05691973459b9e23f7b9667137528df0f [73/80] maple_tree: add mas_prev_range() and mas_find_range_rev interface
config: arc-randconfig-r043-20230502 (https://download.01.org/0day-ci/archive/20230506/202305062247.va92Dm6P-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 12.1.0
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/akpm/mm.git/commit/?id=93bb3be05691973459b9e23f7b9667137528df0f
        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
        git fetch --no-tags akpm-mm mm-unstable
        git checkout 93bb3be05691973459b9e23f7b9667137528df0f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305062247.va92Dm6P-lkp@intel.com/

All warnings (new ones prefixed by >>):

   lib/maple_tree.c:4606:7: warning: no previous prototype for 'mas_prev_slot' [-Wmissing-prototypes]
    4606 | void *mas_prev_slot(struct ma_state *mas, unsigned long min, bool empty)
         |       ^~~~~~~~~~~~~
   lib/maple_tree.c:4758:7: warning: no previous prototype for 'mas_next_slot' [-Wmissing-prototypes]
    4758 | void *mas_next_slot(struct ma_state *mas, unsigned long max, bool empty)
         |       ^~~~~~~~~~~~~
>> lib/maple_tree.c:6251:7: warning: no previous prototype for 'mas_find_range_rev' [-Wmissing-prototypes]
    6251 | void *mas_find_range_rev(struct ma_state *mas, unsigned long min)
         |       ^~~~~~~~~~~~~~~~~~


vim +/mas_find_range_rev +6251 lib/maple_tree.c

  6237	
  6238	/**
  6239	 * mas_find_range_rev: On the first call, find the first non-null entry at or
  6240	 * below mas->index down to %min.  Otherwise advance to the previous slot after
  6241	 * mas->index down to %min.
  6242	 * @mas: The maple state
  6243	 * @min: The minimum value to check.
  6244	 *
  6245	 * Must hold rcu_read_lock or the write lock.
  6246	 * If an entry exists, last and index are updated accordingly.
  6247	 * May set @mas->node to MAS_NONE.
  6248	 *
  6249	 * Return: The entry or %NULL.
  6250	 */
> 6251	void *mas_find_range_rev(struct ma_state *mas, unsigned long min)
  6252	{
  6253		void *entry;
  6254	
  6255		if (mas_find_rev_setup(mas, min, &entry))
  6256			return entry;
  6257	
  6258		/* Retries on dead nodes handled by mas_prev_slot */
  6259		return mas_prev_slot(mas, min, true);
  6260	}
  6261	EXPORT_SYMBOL_GPL(mas_find_range_rev);
  6262	

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