[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/net/netrom/nr_dev.c b/net/netrom/nr_dev.c
index c7b5d930e732..8c68da5ef0a1 100644
--- a/net/netrom/nr_dev.c
+++ b/net/netrom/nr_dev.c
@@ -95,8 +95,9 @@ static int nr_rebuild_header(struct sk_buff *skb)
 
 #endif
 
-static int nr_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
-        void *daddr, void *saddr, unsigned len)
+static int nr_header(struct sk_buff *skb, struct net_device *dev,
+                     unsigned short type,
+                     const void *daddr, const void *saddr, unsigned len)
 {
         unsigned char *buff = skb_push(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
 
@@ -193,6 +194,12 @@ static struct net_device_stats *nr_get_stats(struct net_device *dev)
         return &nr->stats;
 }
 
+static const struct header_ops nr_header_ops = {
+        .create = nr_header,
+        .rebuild= nr_rebuild_header,
+};
+
+
 void nr_setup(struct net_device *dev)
 {
         dev->mtu                = NR_MAX_PACKET_SIZE;
@@ -200,11 +207,10 @@ void nr_setup(struct net_device *dev)
         dev->open               = nr_open;
         dev->stop               = nr_close;
 
-        dev->hard_header        = nr_header;
+        dev->header_ops         = &nr_header_ops;
         dev->hard_header_len    = NR_NETWORK_LEN + NR_TRANSPORT_LEN;
         dev->addr_len           = AX25_ADDR_LEN;
         dev->type               = ARPHRD_NETROM;
-        dev->rebuild_header     = nr_rebuild_header;
         dev->set_mac_address    = nr_set_mac_address;
 
         /* New-style flags. */