orangefs: constify inode_operations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
index 2281882..db78ddd 100644
--- a/fs/orangefs/orangefs-kernel.h
+++ b/fs/orangefs/orangefs-kernel.h
@@ -570,10 +570,10 @@
 
 extern const struct address_space_operations orangefs_address_operations;
 extern struct backing_dev_info orangefs_backing_dev_info;
-extern struct inode_operations orangefs_file_inode_operations;
+extern const struct inode_operations orangefs_file_inode_operations;
 extern const struct file_operations orangefs_file_operations;
-extern struct inode_operations orangefs_symlink_inode_operations;
-extern struct inode_operations orangefs_dir_inode_operations;
+extern const struct inode_operations orangefs_symlink_inode_operations;
+extern const struct inode_operations orangefs_dir_inode_operations;
 extern const struct file_operations orangefs_dir_operations;
 extern const struct dentry_operations orangefs_dentry_operations;
 extern const struct file_operations orangefs_devreq_file_operations;