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f2fs: avoid casted negative value as shrink count
This patch makes sure it returns a positive value instead of a probable casted negative value as shrink count. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -21,14 +21,16 @@ static unsigned int shrinker_run_no;
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static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi)
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{
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return NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt;
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long count = NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt;
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return count > 0 ? count : 0;
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}
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static unsigned long __count_free_nids(struct f2fs_sb_info *sbi)
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{
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if (NM_I(sbi)->nid_cnt[FREE_NID_LIST] > MAX_FREE_NIDS)
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return NM_I(sbi)->nid_cnt[FREE_NID_LIST] - MAX_FREE_NIDS;
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return 0;
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long count = NM_I(sbi)->nid_cnt[FREE_NID_LIST] - MAX_FREE_NIDS;
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return count > 0 ? count : 0;
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}
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static unsigned long __count_extent_cache(struct f2fs_sb_info *sbi)
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