diff options
| -rw-r--r-- | fs/btrfs/sysfs.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 3d14618ce54b..4879656bda3c 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -367,7 +367,13 @@ static ssize_t btrfs_label_show(struct kobject *kobj, { struct btrfs_fs_info *fs_info = to_fs_info(kobj); char *label = fs_info->super_copy->label; - return snprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label); + ssize_t ret; + + spin_lock(&fs_info->super_lock); + ret = snprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label); + spin_unlock(&fs_info->super_lock); + + return ret; } static ssize_t btrfs_label_store(struct kobject *kobj, |