[android-common:android12-5.10 16/22] mm/swapfile.c:102:26: warning: no previous prototype for function 'swap_type_to_swap_info'

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

tree:   https://android.googlesource.com/kernel/common android12-5.10
head:   422887ef073ab9748ddbdf4ffe3009e040f93c4c
commit: 4506bcbba5ec78d8d694fbb43e964cfefe900887 [16/22] ANDROID: mm: export swap_type_to_swap_info
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20231104/202311040403.Vs8dXP6G-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231104/202311040403.Vs8dXP6G-lkp@intel.com/reproduce)

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/202311040403.Vs8dXP6G-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/swapfile.c:102:26: warning: no previous prototype for function 'swap_type_to_swap_info' [-Wmissing-prototypes]
   struct swap_info_struct *swap_type_to_swap_info(int type)
                            ^
   mm/swapfile.c:102:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct swap_info_struct *swap_type_to_swap_info(int type)
   ^
   static 
   1 warning generated.


vim +/swap_type_to_swap_info +102 mm/swapfile.c

   101	
 > 102	struct swap_info_struct *swap_type_to_swap_info(int type)
   103	{
   104		if (type >= READ_ONCE(nr_swapfiles))
   105			return NULL;
   106	
   107		smp_rmb();	/* Pairs with smp_wmb in alloc_swap_info. */
   108		return READ_ONCE(swap_info[type]);
   109	}
   110	EXPORT_SYMBOL_GPL(swap_type_to_swap_info);
   111	

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