[NET]: Annotate callers of csum_fold() in net/*

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index a7be106..1a36b17 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1169,7 +1169,7 @@
  */
 int skb_checksum_help(struct sk_buff *skb)
 {
-	unsigned int csum;
+	__wsum csum;
 	int ret = 0, offset = skb->h.raw - skb->data;
 
 	if (skb->ip_summed == CHECKSUM_COMPLETE)
@@ -1193,7 +1193,7 @@
 	BUG_ON(offset <= 0);
 	BUG_ON(skb->csum + 2 > offset);
 
-	*(u16*)(skb->h.raw + skb->csum) = csum_fold(csum);
+	*(__sum16*)(skb->h.raw + skb->csum) = csum_fold(csum);
 
 out_set_summed:
 	skb->ip_summed = CHECKSUM_NONE;