[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, 13 insertions, 2 deletions

diff --git a/net/ax25/ax25_ip.c b/net/ax25/ax25_ip.c
index 930e4918037f..f047a57aa95c 100644
--- a/net/ax25/ax25_ip.c
+++ b/net/ax25/ax25_ip.c
@@ -46,7 +46,9 @@
 
 #ifdef CONFIG_INET
 
-int ax25_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, void *daddr, void *saddr, unsigned len)
+int ax25_hard_header(struct sk_buff *skb, struct net_device *dev,
+                     unsigned short type, const void *daddr,
+                     const void *saddr, unsigned len)
 {
         unsigned char *buff;
 
@@ -215,7 +217,9 @@ put:
 
 #else   /* INET */
 
-int ax25_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, void *daddr, void *saddr, unsigned len)
+int ax25_hard_header(struct sk_buff *skb, struct net_device *dev,
+                     unsigned short type, const void *daddr,
+                     const void *saddr, unsigned len)
 {
         return -AX25_HEADER_LEN;
 }
@@ -227,5 +231,12 @@ int ax25_rebuild_header(struct sk_buff *skb)
 
 #endif
 
+const struct header_ops ax25_header_ops = {
+        .create = ax25_hard_header,
+        .rebuild = ax25_rebuild_header,
+};
+
 EXPORT_SYMBOL(ax25_hard_header);
 EXPORT_SYMBOL(ax25_rebuild_header);
+EXPORT_SYMBOL(ax25_header_ops);
+