[SK_BUFF]: unions of just one member don't get anything done, kill them

Renaming skb->h to skb->transport_header, skb->nh to skb->network_header and
skb->mac to skb->mac_header, to match the names of the associated helpers
(skb[_[re]set]_{transport,network,mac}_header).

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 02988fb..875da38 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -582,7 +582,7 @@
 		skb_reserve(skb2, ll_rs);
 		skb_put(skb2, len + hlen);
 		skb_reset_network_header(skb2);
-		skb2->h.raw = skb2->nh.raw + hlen;
+		skb2->transport_header = skb2->network_header + hlen;
 
 		/*
 		 *	Charge the memory for the fragment to any owner
@@ -713,7 +713,7 @@
 		skb_reset_network_header(skb);
 
 		/* initialize protocol header pointer */
-		skb->h.raw = skb->nh.raw + fragheaderlen;
+		skb->transport_header = skb->network_header + fragheaderlen;
 
 		skb->ip_summed = CHECKSUM_PARTIAL;
 		skb->csum = 0;
@@ -918,7 +918,8 @@
 			 */
 			data = skb_put(skb, fraglen);
 			skb_set_network_header(skb, exthdrlen);
-			skb->h.raw = skb->nh.raw + fragheaderlen;
+			skb->transport_header = (skb->network_header +
+						 fragheaderlen);
 			data += fragheaderlen;
 
 			if (fraggap) {
@@ -1112,8 +1113,8 @@
 			 */
 			skb_put(skb, fragheaderlen + fraggap);
 			skb_reset_network_header(skb);
-			skb->h.raw = skb->nh.raw + fragheaderlen;
-
+			skb->transport_header = (skb->network_header +
+						 fragheaderlen);
 			if (fraggap) {
 				skb->csum = skb_copy_and_csum_bits(skb_prev,
 								   maxfraglen,