[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, 10 insertions, 2 deletions

diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index 0cdcf0d0c6ca..57ec8880bb1a 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -228,7 +228,6 @@ void ieee80211_if_mgmt_setup(struct net_device *dev)
         dev->open = ieee80211_mgmt_open;
         dev->stop = ieee80211_mgmt_stop;
         dev->type = ARPHRD_IEEE80211_PRISM;
-        dev->hard_header_parse = header_parse_80211;
         dev->uninit = ieee80211_if_reinit;
         dev->destructor = ieee80211_if_free;
 }
@@ -546,10 +545,19 @@ static void ieee80211_set_multicast_list(struct net_device *dev)
         netif_tx_unlock(local->mdev);
 }
 
+static const struct header_ops ieee80211_header_ops = {
+        .create         = eth_header,
+        .parse          = header_parse_80211,
+        .rebuild        = eth_rebuild_header,
+        .cache          = eth_header_cache,
+        .cache_update   = eth_header_cache_update,
+};
+
 /* Must not be called for mdev and apdev */
 void ieee80211_if_setup(struct net_device *dev)
 {
         ether_setup(dev);
+        dev->header_ops = &ieee80211_header_ops;
         dev->hard_start_xmit = ieee80211_subif_start_xmit;
         dev->wireless_handlers = &ieee80211_iw_handler_def;
         dev->set_multicast_list = ieee80211_set_multicast_list;
@@ -1197,7 +1205,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
         mdev->open = ieee80211_master_open;
         mdev->stop = ieee80211_master_stop;
         mdev->type = ARPHRD_IEEE80211;
-        mdev->hard_header_parse = header_parse_80211;
+        mdev->header_ops = &ieee80211_header_ops;
 
         sdata->type = IEEE80211_IF_TYPE_AP;
         sdata->dev = mdev;