[NET]: Move hardware header operations out of netdevice.

Since hardware header operations are part of the protocol class
not the device instance, make them into a separate object and
save memory.

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

1 files changed, 18 insertions, 10 deletions

diff --git a/drivers/net/myri_sbus.c b/drivers/net/myri_sbus.c
index d68ee51c095f..8d29319cc5cb 100644
--- a/drivers/net/myri_sbus.c
+++ b/drivers/net/myri_sbus.c
@@ -676,8 +676,9 @@ static int myri_start_xmit(struct sk_buff *skb, struct net_device *dev)
  * saddr=NULL   means use device source address
  * daddr=NULL   means leave destination address (eg unresolved arp)
  */
-static int myri_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
-                       void *daddr, void *saddr, unsigned len)
+static int myri_header(struct sk_buff *skb, struct net_device *dev,
+                       unsigned short type, const void *daddr,
+                       const void *saddr, unsigned len)
 {
         struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
         unsigned char *pad = (unsigned char *) skb_push(skb, MYRI_PAD_LEN);
@@ -759,18 +760,18 @@ static int myri_rebuild_header(struct sk_buff *skb)
         return 0;
 }
 
-int myri_header_cache(struct neighbour *neigh, struct hh_cache *hh)
+static int myri_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
 {
         unsigned short type = hh->hh_type;
         unsigned char *pad;
         struct ethhdr *eth;
-        struct net_device *dev = neigh->dev;
+        const struct net_device *dev = neigh->dev;
 
         pad = ((unsigned char *) hh->hh_data) +
                 HH_DATA_OFF(sizeof(*eth) + MYRI_PAD_LEN);
         eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
 
-        if (type == __constant_htons(ETH_P_802_3))
+        if (type == htons(ETH_P_802_3))
                 return -1;
 
         /* Refill MyriNet padding identifiers, this is just being anal. */
@@ -786,7 +787,9 @@ int myri_header_cache(struct neighbour *neigh, struct hh_cache *hh)
 
 
 /* Called by Address Resolution module to notify changes in address. */
-void myri_header_cache_update(struct hh_cache *hh, struct net_device *dev, unsigned char * haddr)
+void myri_header_cache_update(struct hh_cache *hh,
+                              const struct net_device *dev,
+                              const unsigned char * haddr)
 {
         memcpy(((u8*)hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
                haddr, dev->addr_len);
@@ -881,6 +884,13 @@ static void dump_eeprom(struct myri_eth *mp)
 }
 #endif
 
+static const struct header_ops myri_header_ops = {
+        .create         = myri_header,
+        .rebuild        = myri_rebuild_header,
+        .cache          = myri_header_cache,
+        .cache_update   = myri_header_cache_update,
+};
+
 static int __devinit myri_ether_init(struct sbus_dev *sdev)
 {
         static int num;
@@ -1065,11 +1075,9 @@ static int __devinit myri_ether_init(struct sbus_dev *sdev)
 
         dev->mtu                = MYRINET_MTU;
         dev->change_mtu         = myri_change_mtu;
-        dev->hard_header        = myri_header;
-        dev->rebuild_header     = myri_rebuild_header;
+        dev->header_ops         = &myri_header_ops;
+
         dev->hard_header_len    = (ETH_HLEN + MYRI_PAD_LEN);
-        dev->hard_header_cache  = myri_header_cache;
-        dev->header_cache_update= myri_header_cache_update;
 
         /* Load code onto the LANai. */
         DET(("Loading LANAI firmware\n"));