[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, 4 insertions, 1 deletions

diff --git a/include/net/ax25.h b/include/net/ax25.h
index 99a4e364c74a..4e3cd93f81fc 100644
--- a/include/net/ax25.h
+++ b/include/net/ax25.h
@@ -363,8 +363,11 @@ extern int  ax25_rx_iframe(ax25_cb *, struct sk_buff *);
 extern int  ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
 
 /* ax25_ip.c */
-extern int  ax25_hard_header(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int);
+extern int ax25_hard_header(struct sk_buff *, struct net_device *,
+                            unsigned short, const void *,
+                            const void *, unsigned int);
 extern int  ax25_rebuild_header(struct sk_buff *);
+extern const struct header_ops ax25_header_ops;
 
 /* ax25_out.c */
 extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *);