mac80211: move TX info into skb->cb

This patch converts mac80211 and all drivers to have transmit
information and status in skb->cb rather than allocating extra
memory for it and copying all the data around. To make it fit,
a union is used where only data that is necessary for all steps
is kept outside of the union.

A number of fixes were done by Ivo, as well as the rt2x00 part
of this patch.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 0 insertions, 16 deletions

diff --git a/drivers/net/wireless/zd1211rw/zd_mac.h b/drivers/net/wireless/zd1211rw/zd_mac.h
index 71170244d2c9..18c1d56d3dd7 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.h
+++ b/drivers/net/wireless/zd1211rw/zd_mac.h
@@ -149,22 +149,6 @@ struct housekeeping {
         struct delayed_work link_led_work;
 };
 
-/**
- * struct zd_tx_skb_control_block - control block for tx skbuffs
- * @control: &struct ieee80211_tx_control pointer
- * @context: context pointer
- *
- * This structure is used to fill the cb field in an &sk_buff to transmit.
- * The control field is NULL, if there is no requirement from the mac80211
- * stack to report about the packet ACK. This is the case if the flag
- * IEEE80211_TXCTL_NO_ACK is not set in &struct ieee80211_tx_control.
- */
-struct zd_tx_skb_control_block {
-        struct ieee80211_tx_control *control;
-        struct ieee80211_hw *hw;
-        void *context;
-};
-
 #define ZD_MAC_STATS_BUFFER_SIZE 16
 
 #define ZD_MAC_MAX_ACK_WAITERS 10