[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, 10 insertions, 4 deletions

diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index d08fbc396648..9e43c47691ca 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -578,8 +578,9 @@ static int ax_open_dev(struct net_device *dev)
 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
 
 /* Return the frame type ID */
-static int ax_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
-          void *daddr, void *saddr, unsigned len)
+static int ax_header(struct sk_buff *skb, struct net_device *dev,
+                     unsigned short type, const void *daddr,
+                     const void *saddr, unsigned len)
 {
 #ifdef CONFIG_INET
         if (type != htons(ETH_P_AX25))
@@ -670,6 +671,11 @@ static struct net_device_stats *ax_get_stats(struct net_device *dev)
         return &ax->stats;
 }
 
+static const struct header_ops ax_header_ops = {
+        .create    = ax_header,
+        .rebuild   = ax_rebuild_header,
+};
+
 static void ax_setup(struct net_device *dev)
 {
         /* Finish setting up the DEVICE info. */
@@ -683,8 +689,8 @@ static void ax_setup(struct net_device *dev)
         dev->addr_len        = 0;
         dev->type            = ARPHRD_AX25;
         dev->tx_queue_len    = 10;
-        dev->hard_header     = ax_header;
-        dev->rebuild_header  = ax_rebuild_header;
+        dev->header_ops      = &ax_header_ops;
+
 
         memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
         memcpy(dev->dev_addr,  &ax25_defaddr,  AX25_ADDR_LEN);