mm/sharepool: Change data type of members in sp_spa_stat to atomic64.
hulk inclusion category: other bugzilla: https://gitee.com/openeuler/kernel/issues/I6GI0X ---------------------------------------------- Member of sp_spa_stat is changed to atomic64_t to solve the concurrency problem.Spa_stat no longer needs sp_area_lock protection. Signed-off-by: NXu Qiang <xuqiang36@huawei.com>
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