diff options
| author | Chao Yu <yuchao0@huawei.com> | 2016-10-11 22:31:36 +0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:34:19 +0200 |
| commit | 2c44c19f3b56fd5f8007d7e31beae71b6373b6c4 (patch) | |
| tree | d4f84f619fd4ef535428e83b79d9e5524a48031c | |
| parent | f3ab5fdb8d463662c44827f714be2aaeef850c60 (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 618dc65e2..cb303f9ed 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) |