All the other arquitectures have sizeofUreg and it is quite convenient.

Reference: /n/sources/patch/applied/armuregsz
Date: Mon Jul 11 11:42:18 CES 2011
Signed-off-by: paurea@gmail.com

--- /sys/lib/acid/arm	Mon Jul 11 11:42:06 2011
+++ /sys/lib/acid/arm	Mon Jul 11 11:42:03 2011
@@ -68,6 +68,7 @@
 	}
 }
 
+sizeofUreg=72;
 aggr Ureg
 {
 	'U' 0 r0;