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memcg: use proper type for mod_memcg_state
The memcg stats update functions can take arbitrary integer but the only input which make sense is enum memcg_stat_item and we don't want these functions to be called with arbitrary integer, so replace the parameter type with enum memcg_stat_item and compiler will be able to warn if memcg stat update functions are called with incorrect index value. Link: https://lkml.kernel.org/r/20240501172617.678560-9-shakeel.butt@linux.dev Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev> Reviewed-by: T.J. Mercier <tjmercier@google.com> Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Yosry Ahmed <yosryahmed@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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