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authorChao Yu <yuchao0@huawei.com>2016-09-20 05:29:47 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2016-09-30 20:05:50 +0300
commitfadb2fb8af5348c1bc59cab17c6f8bf515e50d55 (patch)
tree437503e890baf0603218fa20d36cbc1ecf3102ec /fs/f2fs
parent9e1e6df412a28cdbbd2909de5c6189eda4a3383d (diff)
downloadlinux-fadb2fb8af5348c1bc59cab17c6f8bf515e50d55.tar.xz
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>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h8
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)