--- linux-2.6.19-rc2/include/net/request_sock.h	2006-10-13 18:25:04.000000000 +0200
+++ linux-2.6.19-rc2-ed/include/net/request_sock.h	2006-10-16 19:34:19.000000000 +0200
@@ -254,9 +254,13 @@
 	req->sk = NULL;
 	req->dl_next = lopt->syn_table[hash];
 
-	write_lock(&queue->syn_wait_lock);
+	/*
+	 * We want previous writes being commited before doing this change,
+	 * so that readers of the chain are not confused.
+	 */
+	smp_mb();
+
 	lopt->syn_table[hash] = req;
-	write_unlock(&queue->syn_wait_lock);
 }
 
 #endif /* _REQUEST_SOCK_H */