diff options
Diffstat (limited to 'net/mac80211/sta_info.h')
| -rw-r--r-- | net/mac80211/sta_info.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 0602363ff63b..c821fe47c2d1 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -241,6 +241,8 @@ struct sta_ampdu_mlme { /* Value to indicate no TID reservation */ #define IEEE80211_TID_UNRESERVED 0xff +#define IEEE80211_FAST_XMIT_MAX_IV 18 + /** * struct ieee80211_fast_tx - TX fastpath information * @key: key to use for hw crypto @@ -252,15 +254,17 @@ struct sta_ampdu_mlme { * @band: band this will be transmitted on, for tx_info * @rcu_head: RCU head to free this struct * - * Try to keep this struct small so it fits into a single cacheline. + * This struct is small enough so that the common case (maximum crypto + * header length of 8 like for CCMP/GCMP) fits into a single 64-byte + * cache line. */ struct ieee80211_fast_tx { struct ieee80211_key *key; - u8 hdr[30 + 2 + IEEE80211_CCMP_HDR_LEN + - sizeof(rfc1042_header)]; u8 hdr_len; u8 sa_offs, da_offs, pn_offs; u8 band; + u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + + sizeof(rfc1042_header)]; struct rcu_head rcu_head; }; |