NTFS: Add ifdef NTFS_RW arround ntfs_truncate and ntfs_setattr.

fs/ntfs/file.c

@@ -64,8 +64,10 @@ struct file_operations ntfs_file_ops = {
 };
 
 struct inode_operations ntfs_file_inode_ops = {
+#ifdef NTFS_RW
 	.truncate	= ntfs_truncate,
 	.setattr	= ntfs_setattr,
+#endif
 };
 
 struct file_operations ntfs_empty_file_ops = {};

fs/ntfs/inode.c

@@ -1928,6 +1928,8 @@ int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt)
 	return 0;
 }
 
+#ifdef NTFS_RW
+
 /**
  * ntfs_truncate - called when the i_size of an ntfs inode is changed
  * @vi:		inode for which the i_size was changed
@@ -2017,3 +2019,5 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
 	return err;
 }
 
+#endif
+

fs/ntfs/inode.h

@@ -245,9 +245,13 @@ extern void ntfs_put_inode(struct inode *vi);
 
 extern int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt);
 
+#ifdef NTFS_RW
+
 extern void ntfs_truncate(struct inode *vi);
 
 extern int ntfs_setattr(struct dentry *dentry, struct iattr *attr);
 
+#endif
+
 #endif /* _LINUX_NTFS_FS_INODE_H */