diff options
| author | Chao Yu <yuchao0@huawei.com> | 2016-10-11 22:31:36 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-12-01 10:38:24 -0800 |
| commit | 518a2cf9a065fe11df9382dfb089c745c6ebca69 (patch) | |
| tree | 47ade5eec77707e2962f1f55b8e64fb179f2537c | |
| parent | b1b14da24aab69fbb84159fe5c57035dafc50276 (diff) | |
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>
| -rw-r--r-- | fs/f2fs/shrinker.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c index ec539f407cc4..5c60fc28ec75 100644 --- a/fs/f2fs/shrinker.c +++ b/fs/f2fs/shrinker.c @@ -21,14 +21,16 @@ static unsigned int shrinker_run_no; static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi) { - return NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt; + long count = NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt; + + return count > 0 ? count : 0; } static unsigned long __count_free_nids(struct f2fs_sb_info *sbi) { - if (NM_I(sbi)->nid_cnt[FREE_NID_LIST] > MAX_FREE_NIDS) - return NM_I(sbi)->nid_cnt[FREE_NID_LIST] - MAX_FREE_NIDS; - return 0; + long count = NM_I(sbi)->nid_cnt[FREE_NID_LIST] - MAX_FREE_NIDS; + + return count > 0 ? count : 0; } static unsigned long __count_extent_cache(struct f2fs_sb_info *sbi) |