[NET]: Remove HIPPI private from skbuff.h

This removes the private element from skbuff, that is only used by
HIPPI. Instead it uses skb->cb[] to hold the additional data that is
needed in the output path from hard_header to device driver.

PS: The only qdisc that might potentially corrupt this cb[] is if
netem was used over HIPPI. I will take care of that by fixing netem
to use skb->stamp. I don't expect many users of netem over HIPPI

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 10 insertions, 11 deletions

diff --git a/drivers/net/rrunner.c b/drivers/net/rrunner.c
index 12a86f96d973..ec1a18d189a1 100644
--- a/drivers/net/rrunner.c
+++ b/drivers/net/rrunner.c
@@ -1429,6 +1429,7 @@ static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
         struct rr_private *rrpriv = netdev_priv(dev);
         struct rr_regs __iomem *regs = rrpriv->regs;
+        struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
         struct ring_ctrl *txctrl;
         unsigned long flags;
         u32 index, len = skb->len;
@@ -1460,7 +1461,7 @@ static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
         ifield = (u32 *)skb_push(skb, 8);
 
         ifield[0] = 0;
-        ifield[1] = skb->private.ifield;
+        ifield[1] = hcb->ifield;
 
         /*
          * We don't need the lock before we are actually going to start
diff --git a/include/linux/hippidevice.h b/include/linux/hippidevice.h
index 9debe6bbe5f0..9bc3b688d2ee 100644
--- a/include/linux/hippidevice.h
+++ b/include/linux/hippidevice.h
@@ -26,6 +26,11 @@
 #include <linux/if_hippi.h>
 
 #ifdef __KERNEL__
+
+struct hippi_cb {
+        __u32   ifield;
+};
+
 extern unsigned short hippi_type_trans(struct sk_buff *skb,
                                        struct net_device *dev);
 
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index f10a8b9628b0..4aeadb102589 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -193,7 +193,6 @@ struct skb_shared_info {
  *      @nfct: Associated connection, if any
  *      @nfctinfo: Relationship of this skb to the connection
  *      @nf_bridge: Saved data about a bridged frame - see br_netfilter.c
- *      @private: Data which is private to the HIPPI implementation
  *      @tc_index: Traffic control index
  *      @tc_verd: traffic control verdict
  */
@@ -265,11 +264,6 @@ struct sk_buff {
         struct nf_bridge_info   *nf_bridge;
 #endif
 #endif /* CONFIG_NETFILTER */
-#if defined(CONFIG_HIPPI)
-        union {
-                __u32           ifield;
-        } private;
-#endif
 #ifdef CONFIG_NET_SCHED
        __u32                    tc_index;        /* traffic control index */
 #ifdef CONFIG_NET_CLS_ACT
diff --git a/net/802/hippi.c b/net/802/hippi.c
index 051e8af56a77..cb45ae1310cb 100644
--- a/net/802/hippi.c
+++ b/net/802/hippi.c
@@ -51,6 +51,7 @@ static int hippi_header(struct sk_buff *skb, struct net_device *dev,
                         unsigned len)
 {
         struct hippi_hdr *hip = (struct hippi_hdr *)skb_push(skb, HIPPI_HLEN);
+        struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
 
         if (!len){
                 len = skb->len - HIPPI_HLEN;
@@ -84,9 +85,10 @@ static int hippi_header(struct sk_buff *skb, struct net_device *dev,
         if (daddr)
         {
                 memcpy(hip->le.dest_switch_addr, daddr + 3, 3);
-                memcpy(&skb->private.ifield, daddr + 2, 4);
+                memcpy(&hcb->ifield, daddr + 2, 4);
                 return HIPPI_HLEN;
         }
+        hcb->ifield = 0;
         return -((int)HIPPI_HLEN);
 }
 
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 8896e6f8aa42..16df7bd77e78 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -365,9 +365,6 @@ struct sk_buff *skb_clone(struct sk_buff *skb, unsigned int __nocast gfp_mask)
         nf_bridge_get(skb->nf_bridge);
 #endif
 #endif /*CONFIG_NETFILTER*/
-#if defined(CONFIG_HIPPI)
-        C(private);
-#endif
 #ifdef CONFIG_NET_SCHED
         C(tc_index);
 #ifdef CONFIG_NET_CLS_ACT