diff options
| author | Chao Yu <yuchao0@huawei.com> | 2016-09-20 10:29:47 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-09-30 10:05:50 -0700 |
| commit | fadb2fb8af5348c1bc59cab17c6f8bf515e50d55 (patch) | |
| tree | 437503e890baf0603218fa20d36cbc1ecf3102ec | |
| parent | 9e1e6df412a28cdbbd2909de5c6189eda4a3383d (diff) | |
f2fs: fix to avoid race condition when updating sbi flag
Making updating of sbi flag atomic by using {test,set,clear}_bit,
otherwise in concurrency scenario, the flag could be updated incorrectly.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/f2fs.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index cda8e6f96618..04e96181e928 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -777,7 +777,7 @@ struct f2fs_sb_info { struct proc_dir_entry *s_proc; /* proc entry */ struct f2fs_super_block *raw_super; /* raw super block pointer */ int valid_super_block; /* valid super block no */ - int s_flag; /* flags for sbi */ + unsigned long s_flag; /* flags for sbi */ #ifdef CONFIG_F2FS_FS_ENCRYPTION u8 key_prefix[F2FS_KEY_DESC_PREFIX_SIZE]; @@ -1046,17 +1046,17 @@ static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi) static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type) { - return sbi->s_flag & (0x01 << type); + return test_bit(type, &sbi->s_flag); } static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type) { - sbi->s_flag |= (0x01 << type); + set_bit(type, &sbi->s_flag); } static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type) { - sbi->s_flag &= ~(0x01 << type); + clear_bit(type, &sbi->s_flag); } static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) |