--- linux-2.6.13.4/fs/filesystems.c	2005-10-10 13:54:29.000000000 -0500
+++ linux-2.6.13.4-edit/fs/filesystems.c	2005-11-02 02:33:30.685600000 -0600
@@ -76,7 +76,7 @@
 	write_lock(&file_systems_lock);
 	p = find_filesystem(fs->name);
 	if (*p)
-		res = -EBUSY;
+		res = -EEXIST;
 	else
 		*p = fs;
 	write_unlock(&file_systems_lock);