diff options
| -rw-r--r-- | fs/nilfs2/ioctl.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c index 8e5cad020c30..313d0a21da48 100644 --- a/fs/nilfs2/ioctl.c +++ b/fs/nilfs2/ioctl.c @@ -601,13 +601,17 @@ static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, { __u64 cno; int ret; + struct the_nilfs *nilfs; ret = nilfs_construct_segment(inode->i_sb); if (ret < 0) return ret; if (argp != NULL) { - cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1; + nilfs = NILFS_SB(inode->i_sb)->s_nilfs; + down_read(&nilfs->ns_segctor_sem); + cno = nilfs->ns_cno - 1; + up_read(&nilfs->ns_segctor_sem); if (copy_to_user(argp, &cno, sizeof(cno))) return -EFAULT; } |