[NET]: Annotate callers of the reset of checksum.h stuff.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/icmp.c

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 4ab8acf..3dcc4b7 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -262,7 +262,7 @@
 {
 	struct icmpv6_msg *msg = (struct icmpv6_msg *) from;
 	struct sk_buff *org_skb = msg->skb;
-	__u32 csum = 0;
+	__wsum csum = 0;
 
 	csum = skb_copy_and_csum_bits(org_skb, msg->offset + offset,
 				      to, len, csum);