extern const struct address_space_operations ntfs_mst_aops;
extern const struct file_operations ntfs_file_ops;
-extern struct inode_operations ntfs_file_inode_ops;
+extern const struct inode_operations ntfs_file_inode_ops;
extern const struct file_operations ntfs_dir_ops;
-extern struct inode_operations ntfs_dir_inode_ops;
+extern const struct inode_operations ntfs_dir_inode_ops;
extern const struct file_operations ntfs_empty_file_ops;
-extern struct inode_operations ntfs_empty_inode_ops;
+extern const struct inode_operations ntfs_empty_inode_ops;
extern struct export_operations ntfs_export_ops;