[android-common:chromeos-6.6-9dc491310679 14/66] mm/vmscan.c:1565:13: error: call to undeclared function 'lru_raw_gen_from_flags'; ISO C99 and later do not support implicit function declarations

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

tree:   https://android.googlesource.com/kernel/common chromeos-6.6-9dc491310679
head:   85b769c103dd3276826ee519cc574181563acb08
commit: 29749af3cb36ba2c31106d631bffa86aa7f7e3de [14/66] CHROMIUM: mm/mglru: Improve isolated page access bit harvesting
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20241116/202411162345.DOyJHTij-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241116/202411162345.DOyJHTij-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/202411162345.DOyJHTij-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from mm/vmscan.c:15:
   In file included from include/linux/mm.h:2253:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from mm/vmscan.c:30:
   include/linux/mm_inline.h:49:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      49 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
         |                                    ~~~~~~~~~~~ ^ ~~~
   include/linux/mm_inline.h:51:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      51 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
         |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
   mm/vmscan.c:678:51: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     678 |                         size += zone_page_state(zone, NR_ZONE_LRU_BASE + lru);
         |                                                       ~~~~~~~~~~~~~~~~ ^ ~~~
   mm/vmscan.c:1043:15: warning: no previous prototype for function 'shrink_slab' [-Wmissing-prototypes]
    1043 | unsigned long shrink_slab(gfp_t gfp_mask, int nid,
         |               ^
   mm/vmscan.c:1043:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1043 | unsigned long shrink_slab(gfp_t gfp_mask, int nid,
         | ^
         | static 
>> mm/vmscan.c:1565:13: error: call to undeclared function 'lru_raw_gen_from_flags'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1565 |                 int gen = lru_raw_gen_from_flags(READ_ONCE(folio->flags));
         |                           ^
>> mm/vmscan.c:1567:31: error: use of undeclared identifier 'ISOLATED_FOLIO_MIN'
    1567 |                 VM_WARN_ON_ONCE_FOLIO(gen < ISOLATED_FOLIO_MIN, folio);
         |                                             ^
   mm/vmscan.c:1569:13: error: use of undeclared identifier 'ISOLATED_FOLIO_MIN'
    1569 |                 if (gen > ISOLATED_FOLIO_MIN)
         |                           ^
   mm/vmscan.c:1570:29: error: use of undeclared identifier 'ISOLATED_FOLIO_MIN'
    1570 |                         referenced_ptes += gen - ISOLATED_FOLIO_MIN;
         |                                                  ^
   mm/vmscan.c:2446:4: warning: arithmetic between different enumeration types ('enum vm_event_item' and 'enum zone_type') [-Wenum-enum-conversion]
    2446 |                         __count_zid_vm_events(PGSCAN_SKIP, zid, nr_skipped[zid]);
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:135:34: note: expanded from macro '__count_zid_vm_events'
     135 |         __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
         |                           ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   mm/vmscan.c:2974:51: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    2974 |         inactive = lruvec_page_state(lruvec, NR_LRU_BASE + inactive_lru);
         |                                              ~~~~~~~~~~~ ^ ~~~~~~~~~~~~
   mm/vmscan.c:2975:49: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    2975 |         active = lruvec_page_state(lruvec, NR_LRU_BASE + active_lru);
         |                                            ~~~~~~~~~~~ ^ ~~~~~~~~~~
   mm/vmscan.c:7353:3: warning: arithmetic between different enumeration types ('enum vm_event_item' and 'enum zone_type') [-Wenum-enum-conversion]
    7353 |                 __count_zid_vm_events(ALLOCSTALL, sc->reclaim_idx, 1);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:135:34: note: expanded from macro '__count_zid_vm_events'
     135 |         __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
         |                           ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   9 warnings and 4 errors generated.


vim +/lru_raw_gen_from_flags +1565 mm/vmscan.c

  1539	
  1540	static enum folio_references folio_check_references(struct folio *folio,
  1541							  struct scan_control *sc)
  1542	{
  1543		int referenced_ptes, referenced_folio;
  1544		unsigned long vm_flags;
  1545		int ret = 0;
  1546		bool trylock_failed = false;
  1547	
  1548	#ifdef CONFIG_ANDROID_VENDOR_OEM_DATA
  1549		trace_android_vh_page_should_be_protected(folio, sc->nr_scanned,
  1550			sc->priority, &sc->android_vendor_data1, &ret);
  1551	#endif
  1552		trace_android_vh_check_folio_look_around_ref(folio, &ret);
  1553		if (ret)
  1554			return ret;
  1555	
  1556		trace_android_vh_folio_trylock_set(folio);
  1557		referenced_ptes = folio_referenced(folio, 1, sc->target_mem_cgroup,
  1558						   &vm_flags);
  1559		referenced_folio = folio_test_clear_referenced(folio);
  1560		trace_android_vh_get_folio_trylock_result(folio, &trylock_failed);
  1561		if (trylock_failed)
  1562			return FOLIOREF_KEEP;
  1563	
  1564		if (lru_gen_enabled()) {
> 1565			int gen = lru_raw_gen_from_flags(READ_ONCE(folio->flags));
  1566	
> 1567			VM_WARN_ON_ONCE_FOLIO(gen < ISOLATED_FOLIO_MIN, folio);
  1568	
  1569			if (gen > ISOLATED_FOLIO_MIN)
  1570				referenced_ptes += gen - ISOLATED_FOLIO_MIN;
  1571		}
  1572	
  1573		/*
  1574		 * The supposedly reclaimable folio was found to be in a VM_LOCKED vma.
  1575		 * Let the folio, now marked Mlocked, be moved to the unevictable list.
  1576		 */
  1577		if (vm_flags & VM_LOCKED)
  1578			return FOLIOREF_ACTIVATE;
  1579	
  1580		/*
  1581		 * There are two cases to consider.
  1582		 * 1) Rmap lock contention: rotate.
  1583		 * 2) Skip the non-shared swapbacked folio mapped solely by
  1584		 *    the exiting or OOM-reaped process.
  1585		 */
  1586		if (referenced_ptes == -1)
  1587			return FOLIOREF_KEEP;
  1588	
  1589		if (referenced_ptes) {
  1590			/*
  1591			 * All mapped folios start out with page table
  1592			 * references from the instantiating fault, so we need
  1593			 * to look twice if a mapped file/anon folio is used more
  1594			 * than once.
  1595			 *
  1596			 * Mark it and spare it for another trip around the
  1597			 * inactive list.  Another page table reference will
  1598			 * lead to its activation.
  1599			 *
  1600			 * Note: the mark is set for activated folios as well
  1601			 * so that recently deactivated but used folios are
  1602			 * quickly recovered.
  1603			 */
  1604			folio_set_referenced(folio);
  1605	
  1606			if (referenced_folio || referenced_ptes > 1)
  1607				return FOLIOREF_ACTIVATE;
  1608	
  1609			/*
  1610			 * Activate file-backed executable folios after first usage.
  1611			 */
  1612			if ((vm_flags & VM_EXEC) && folio_is_file_lru(folio))
  1613				return FOLIOREF_ACTIVATE;
  1614	
  1615			return FOLIOREF_KEEP;
  1616		}
  1617	
  1618		/* Reclaim if clean, defer dirty folios to writeback */
  1619		if (referenced_folio && folio_is_file_lru(folio))
  1620			return FOLIOREF_RECLAIM_CLEAN;
  1621	
  1622		return FOLIOREF_RECLAIM;
  1623	}
  1624	

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