[SELINUX]: Fix 2.6.20-rc6 build when no xfrm

This patch is an incremental fix to the flow_cache_genid
patch for selinux that breaks the build of 2.6.20-rc6 when
xfrm is not configured.
Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

security/selinux/include/xfrm.h

@@ -37,6 +37,11 @@ int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
 int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
 			struct avc_audit_data *ad, u8 proto);
 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
+
+static inline void selinux_xfrm_notify_policyload(void)
+{
+	atomic_inc(&flow_cache_genid);
+}
 #else
 static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
 			struct avc_audit_data *ad)
@@ -55,6 +60,10 @@ static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int
 	*sid = SECSID_NULL;
 	return 0;
 }
+
+static inline void selinux_xfrm_notify_policyload(void)
+{
+}
 #endif
 
 static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)

security/selinux/ss/services.c

@@ -1299,7 +1299,7 @@ int security_load_policy(void *data, size_t len)
 		avc_ss_reset(seqno);
 		selnl_notify_policyload(seqno);
 		selinux_netlbl_cache_invalidate();
-		atomic_inc(&flow_cache_genid);
+		selinux_xfrm_notify_policyload();
 		return 0;
 	}
 
@@ -1355,7 +1355,7 @@ int security_load_policy(void *data, size_t len)
 	avc_ss_reset(seqno);
 	selnl_notify_policyload(seqno);
 	selinux_netlbl_cache_invalidate();
-	atomic_inc(&flow_cache_genid);
+	selinux_xfrm_notify_policyload();
 
 	return 0;
 
@@ -1855,7 +1855,7 @@ out:
 	if (!rc) {
 		avc_ss_reset(seqno);
 		selnl_notify_policyload(seqno);
-		atomic_inc(&flow_cache_genid);
+		selinux_xfrm_notify_policyload();
 	}
 	return rc;
 }