[rgushchin:memcontrol_v1.1 5/5] mm/memcontrol-v1.c:1875:48: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list')

[rgushchin:memcontrol_v1.1 5/5] mm/memcontrol-v1.c:1875:48: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list')

[kernel test robot]

TO: Roman Gushchin <roman.gushchin@linux.dev>

tree:   https://github.com/rgushchin/linux.git memcontrol_v1.1
head:   9b269ef160d984dc9ed844151a21384b4ad60fdc
commit: 9b269ef160d984dc9ed844151a21384b4ad60fdc [5/5] mm: memcg: move cgroup v1 interface files to memcontrol-v1.c
config: s390-defconfig (https://download.01.org/0day-ci/archive/20240507/202405071035.tUhz0N6s-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 37ae4ad0eef338776c7e2cffb3896153d43dcd90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240507/202405071035.tUhz0N6s-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/202405071035.tUhz0N6s-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from mm/memcontrol-v1.c:3:
   In file included from include/linux/memcontrol.h:21:
   In file included from include/linux/mm.h:2253:
   include/linux/vmstat.h:500:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     500 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     501 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:507:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     507 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     508 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:519:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     519 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     520 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:528:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     528 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     529 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   In file included from mm/memcontrol-v1.c:10:
   include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
         |                                    ~~~~~~~~~~~ ^ ~~~
   include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
         |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
>> mm/memcontrol-v1.c:1875:48: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    1875 |                         nr += lruvec_page_state(lruvec, NR_LRU_BASE + lru);
         |                                                         ~~~~~~~~~~~ ^ ~~~
   mm/memcontrol-v1.c:1877:54: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    1877 |                         nr += lruvec_page_state_local(lruvec, NR_LRU_BASE + lru);
         |                                                               ~~~~~~~~~~~ ^ ~~~
   mm/memcontrol-v1.c:1893:46: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    1893 |                         nr += memcg_page_state(memcg, NR_LRU_BASE + lru);
         |                                                       ~~~~~~~~~~~ ^ ~~~
   mm/memcontrol-v1.c:1895:52: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    1895 |                         nr += memcg_page_state_local(memcg, NR_LRU_BASE + lru);
         |                                                             ~~~~~~~~~~~ ^ ~~~
   11 warnings generated.


vim +1875 mm/memcontrol-v1.c

  1861	
  1862	static unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg,
  1863					int nid, unsigned int lru_mask, bool tree)
  1864	{
  1865		struct lruvec *lruvec = mem_cgroup_lruvec(memcg, NODE_DATA(nid));
  1866		unsigned long nr = 0;
  1867		enum lru_list lru;
  1868	
  1869		VM_BUG_ON((unsigned)nid >= nr_node_ids);
  1870	
  1871		for_each_lru(lru) {
  1872			if (!(BIT(lru) & lru_mask))
  1873				continue;
  1874			if (tree)
> 1875				nr += lruvec_page_state(lruvec, NR_LRU_BASE + lru);
  1876			else
  1877				nr += lruvec_page_state_local(lruvec, NR_LRU_BASE + lru);
  1878		}
  1879		return nr;
  1880	}
  1881	

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