Re: [RFC PATCH v2 2/3] mm/memory-tiers: Introduce sysfs for tier interleave weights

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

Hi Gregory,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on cxl/next cxl/pending v6.6-rc5]
[cannot apply to akpm-mm/mm-everything next-20231012]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Gregory-Price/mm-memory-tiers-change-mutex-to-rw-semaphore/20231012-044511
base:   linus/master
patch link:    https://lore.kernel.org/r/20231009204259.875232-3-gregory.price%40memverge.com
patch subject: [RFC PATCH v2 2/3] mm/memory-tiers: Introduce sysfs for tier interleave weights
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20231013/202310131212.2B2Hfkid-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231013/202310131212.2B2Hfkid-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/202310131212.2B2Hfkid-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from mm/vmscan.c:46:0:
>> include/linux/memory-tiers.h:106:15: warning: no previous declaration for 'memtier_get_node_weight' [-Wmissing-declarations]
    unsigned char memtier_get_node_weight(int from_node, int target_node,
                  ^~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/memory-tiers.h:112:14: warning: no previous declaration for 'memtier_get_total_weight' [-Wmissing-declarations]
    unsigned int memtier_get_total_weight(int from_node, nodemask_t *pol_nodes)
                 ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/memtier_get_node_weight +106 include/linux/memory-tiers.h

   105	
 > 106	unsigned char memtier_get_node_weight(int from_node, int target_node,
   107					      nodemask_t *pol_nodes)
   108	{
   109		return 0;
   110	}
   111	
 > 112	unsigned int memtier_get_total_weight(int from_node, nodemask_t *pol_nodes)

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