[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>
diff --git a/drivers/net/wan/hdlc.c b/drivers/net/wan/hdlc.c
index ee23b91..d553e6f 100644
--- a/drivers/net/wan/hdlc.c
+++ b/drivers/net/wan/hdlc.c
@@ -232,6 +232,8 @@
return -EINVAL;
}
+static const struct header_ops hdlc_null_ops;
+
static void hdlc_setup_dev(struct net_device *dev)
{
/* Re-init all variables changed by HDLC protocol drivers,
@@ -243,13 +245,9 @@
dev->type = ARPHRD_RAWHDLC;
dev->hard_header_len = 16;
dev->addr_len = 0;
- dev->hard_header = NULL;
- dev->rebuild_header = NULL;
- dev->set_mac_address = NULL;
- dev->hard_header_cache = NULL;
- dev->header_cache_update = NULL;
+ dev->header_ops = &hdlc_null_ops;
+
dev->change_mtu = hdlc_change_mtu;
- dev->hard_header_parse = NULL;
}
static void hdlc_setup(struct net_device *dev)