From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 20 Jan 2011 07:37:53 +0000 (+0000)
Subject: ipv6: raw: rcu annotations
X-Git-Tag: v2.6.39-rc1~468^2~495
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=f2eda47df46f9953fc8a4fec820f34d539a8efbb;p=~shefty%2Frdma-dev.git

ipv6: raw: rcu annotations

Remove sparse warnings, using a function typedef to be able to use __rcu
annotation on mh_filter pointer.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 86c39526ba5..2bc6cd7bb8e 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -123,18 +123,18 @@ static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 }
 
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
-static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
+typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
 
-int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
-					   struct sk_buff *skb))
+static mh_filter_t __rcu *mh_filter __read_mostly;
+
+int rawv6_mh_filter_register(mh_filter_t filter)
 {
 	rcu_assign_pointer(mh_filter, filter);
 	return 0;
 }
 EXPORT_SYMBOL(rawv6_mh_filter_register);
 
-int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
-					     struct sk_buff *skb))
+int rawv6_mh_filter_unregister(mh_filter_t filter)
 {
 	rcu_assign_pointer(mh_filter, NULL);
 	synchronize_rcu();
@@ -192,10 +192,10 @@ static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 			 * policy is placed in rawv6_rcv() because it is
 			 * required for each socket.
 			 */
-			int (*filter)(struct sock *sock, struct sk_buff *skb);
+			mh_filter_t *filter;
 
 			filter = rcu_dereference(mh_filter);
-			filtered = filter ? filter(sk, skb) : 0;
+			filtered = filter ? (*filter)(sk, skb) : 0;
 			break;
 		}
 #endif