Revert "xfrm: For 32/64 compatability wrt. xfrm_usersa_info"

This reverts commit fc8c7dc1b29560c016a67a34ccff32a712b5aa86.

As indicated by Jiri Klimes, this won't work.  These numbers are
not only used the size validation, they are also used to locate
attributes sitting after the message.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/xfrm/xfrm_user.c

@@ -1914,17 +1914,10 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
 }
 #endif
 
-/* For the xfrm_usersa_info cases we have to work around some 32-bit vs.
- * 64-bit compatability issues.  On 32-bit the structure is 220 bytes, but
- * for 64-bit it gets padded out to 224 bytes.  Those bytes are just
- * padding and don't have any content we care about.  Therefore as long
- * as we have enough bytes for the content we can make both cases work.
- */
-
 #define XMSGSIZE(type) sizeof(struct type)
 
 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
-	[XFRM_MSG_NEWSA       - XFRM_MSG_BASE] = 220, /* see above */
+	[XFRM_MSG_NEWSA       - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
 	[XFRM_MSG_DELSA       - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
 	[XFRM_MSG_GETSA       - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
 	[XFRM_MSG_NEWPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
@@ -1934,7 +1927,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
 	[XFRM_MSG_ACQUIRE     - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
 	[XFRM_MSG_EXPIRE      - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
 	[XFRM_MSG_UPDPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
-	[XFRM_MSG_UPDSA       - XFRM_MSG_BASE] = 220, /* see above */
+	[XFRM_MSG_UPDSA       - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
 	[XFRM_MSG_POLEXPIRE   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
 	[XFRM_MSG_FLUSHSA     - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
 	[XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,