[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, 6 insertions, 4 deletions

diff --git a/drivers/net/wan/hdlc_cisco.c b/drivers/net/wan/hdlc_cisco.c
index 9ec6cf2e510e..038a6e748bbf 100644
--- a/drivers/net/wan/hdlc_cisco.c
+++ b/drivers/net/wan/hdlc_cisco.c
@@ -74,7 +74,7 @@ static inline struct cisco_state * state(hdlc_device *hdlc)
 
 
 static int cisco_hard_header(struct sk_buff *skb, struct net_device *dev,
-                             u16 type, void *daddr, void *saddr,
+                             u16 type, const void *daddr, const void *saddr,
                              unsigned int len)
 {
         struct hdlc_header *data;
@@ -309,7 +309,6 @@ static void cisco_stop(struct net_device *dev)
 }
 
 
-
 static struct hdlc_proto proto = {
         .start          = cisco_start,
         .stop           = cisco_stop,
@@ -317,7 +316,10 @@ static struct hdlc_proto proto = {
         .ioctl          = cisco_ioctl,
         .module         = THIS_MODULE,
 };
- 
+
+static const struct header_ops cisco_header_ops = {
+        .create = cisco_hard_header,
+};
  
 static int cisco_ioctl(struct net_device *dev, struct ifreq *ifr)
 {
@@ -365,7 +367,7 @@ static int cisco_ioctl(struct net_device *dev, struct ifreq *ifr)
 
                 memcpy(&state(hdlc)->settings, &new_settings, size);
                 dev->hard_start_xmit = hdlc->xmit;
-                dev->hard_header = cisco_hard_header;
+                dev->header_ops = &cisco_header_ops;
                 dev->type = ARPHRD_CISCO;
                 netif_dormant_on(dev);
                 return 0;