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authorGertjan van Wingerde <gwingerde@gmail.com>2009-12-04 23:46:54 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-12-14 14:22:31 -0500
commitd24deb2580823ab0b8425790c6f5d18e2ff749d8 (patch)
treee19fa93ccf306ea54508492a141721a1e4cc3a30 /include/net
parentb2ec153a637409bd87952d44409905b7d98418b8 (diff)
mac80211: Add define for TX headroom reserved by mac80211 itself.
Add a definition of the amount of TX headroom reserved by mac80211 itself for its own purposes. Also add BUILD_BUG_ON to validate the value. This define can then be used by drivers to request additional TX headroom in the most efficient manner. Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/mac80211.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 2aff4906b2a..538d6b76188 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1737,6 +1737,12 @@ static inline void ieee80211_rx_ni(struct ieee80211_hw *hw,
local_bh_enable();
}
+/*
+ * The TX headroom reserved by mac80211 for its own tx_status functions.
+ * This is enough for the radiotap header.
+ */
+#define IEEE80211_TX_STATUS_HEADROOM 13
+
/**
* ieee80211_tx_status - transmit status callback
*