--- zzzz-none-000/linux-3.10.107/fs/filesystems.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/filesystems.c	2021-02-04 17:41:59.000000000 +0000
@@ -121,6 +121,7 @@
 
 EXPORT_SYMBOL(unregister_filesystem);
 
+#ifdef CONFIG_SYSFS_SYSCALL
 static int fs_index(const char __user * __name)
 {
 	struct file_system_type * tmp;
@@ -199,6 +200,7 @@
 	}
 	return retval;
 }
+#endif
 
 int __init get_filesystem_list(char *buf)
 {