diff options
Diffstat (limited to 'fs/dcache.c')
| -rw-r--r-- | fs/dcache.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 60046ae23d51..65cc11939654 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -2509,8 +2509,8 @@ static inline unsigned start_dir_add(struct inode *dir) { preempt_disable_nested(); for (;;) { - unsigned n = dir->i_dir_seq; - if (!(n & 1) && cmpxchg(&dir->i_dir_seq, n, n + 1) == n) + unsigned n = READ_ONCE(dir->i_dir_seq); + if (!(n & 1) && try_cmpxchg(&dir->i_dir_seq, &n, n + 1)) return n; cpu_relax(); } @@ -2922,6 +2922,7 @@ void d_exchange(struct dentry *dentry1, struct dentry *dentry2) write_sequnlock(&rename_lock); } +EXPORT_SYMBOL(d_exchange); /** * d_ancestor - search for an ancestor |