[DCCP]: Fix sparse warnings

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/options.c b/net/dccp/options.c
index fc363aa..d87d6be 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -499,7 +499,8 @@
 	}
 }
 
-struct dccp_ackpkts *dccp_ackpkts_alloc(unsigned int len, int priority)
+struct dccp_ackpkts *dccp_ackpkts_alloc(const unsigned int len,
+				        const unsigned int __nocast priority)
 {
 	struct dccp_ackpkts *ap = kmalloc(sizeof(*ap) + len, priority);