[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, 9 insertions, 4 deletions

diff --git a/net/rose/rose_dev.c b/net/rose/rose_dev.c
index 8d88795dc663..1b6741f1d746 100644
--- a/net/rose/rose_dev.c
+++ b/net/rose/rose_dev.c
@@ -35,8 +35,9 @@
 #include <net/ax25.h>
 #include <net/rose.h>
 
-static int rose_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
-        void *daddr, void *saddr, unsigned len)
+static int rose_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, ROSE_MIN_LEN + 2);
 
@@ -148,6 +149,11 @@ static struct net_device_stats *rose_get_stats(struct net_device *dev)
         return netdev_priv(dev);
 }
 
+static const struct header_ops rose_header_ops = {
+        .create = rose_header,
+        .rebuild= rose_rebuild_header,
+};
+
 void rose_setup(struct net_device *dev)
 {
         dev->mtu                = ROSE_MAX_PACKET_SIZE - 2;
@@ -155,11 +161,10 @@ void rose_setup(struct net_device *dev)
         dev->open               = rose_open;
         dev->stop               = rose_close;
 
-        dev->hard_header        = rose_header;
+        dev->header_ops         = &rose_header_ops;
         dev->hard_header_len    = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
         dev->addr_len           = ROSE_ADDR_LEN;
         dev->type               = ARPHRD_ROSE;
-        dev->rebuild_header     = rose_rebuild_header;
         dev->set_mac_address    = rose_set_mac_address;
 
         /* New-style flags. */