[rgushchin:bpfoom.1.2 5/17] mm/bpf_memcontrol.c:45:27: sparse: sparse: symbol 'bpf_mem_cgroup_events' was not declared. Should it be static?

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

tree:   https://github.com/rgushchin/linux.git bpfoom.1.2
head:   e3a569772f1fbe667574cb12da7cf500a0c91475
commit: 91f1156004c1e4ba4636fb952d8c076579962d05 [5/17] mm: introduce bpf kfuncs to deal with memcg pointers
config: hexagon-randconfig-r133-20250605 (https://download.01.org/0day-ci/archive/20250605/202506051752.uj7dbLuJ-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce: (https://download.01.org/0day-ci/archive/20250605/202506051752.uj7dbLuJ-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/202506051752.uj7dbLuJ-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> mm/bpf_memcontrol.c:45:27: sparse: sparse: symbol 'bpf_mem_cgroup_events' was not declared. Should it be static?
>> mm/bpf_memcontrol.c:67:18: sparse: sparse: symbol 'bpf_mem_cgroup_flush_stats' was not declared. Should it be static?
   mm/bpf_memcontrol.c:37:9: sparse: sparse: context imbalance in 'bpf_get_mem_cgroup' - different lock contexts for basic block

vim +/bpf_mem_cgroup_events +45 mm/bpf_memcontrol.c

    44	
  > 45	__bpf_kfunc unsigned long bpf_mem_cgroup_events(struct mem_cgroup *memcg, int event)
    46	{
    47	
    48		if (event < 0 || event >= NR_VM_EVENT_ITEMS)
    49			return (unsigned long)-1;
    50	
    51		return memcg_events(memcg, event);
    52	}
    53	
    54	__bpf_kfunc unsigned long bpf_mem_cgroup_usage(struct mem_cgroup *memcg, bool swap)
    55	{
    56		return mem_cgroup_usage(memcg, swap);
    57	}
    58	
    59	__bpf_kfunc unsigned long bpf_mem_cgroup_page_state(struct mem_cgroup *memcg, int idx)
    60	{
    61		if (idx < 0 || idx >= MEMCG_NR_STAT)
    62			return (unsigned long)-1;
    63	
    64		return memcg_page_state(memcg, idx);
    65	}
    66	
  > 67	__bpf_kfunc void bpf_mem_cgroup_flush_stats(struct mem_cgroup *memcg)
    68	{
    69		mem_cgroup_flush_stats(memcg);
    70	}
    71	

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