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authorJohannes Berg <johannes@sipsolutions.net>2009-08-10 16:02:40 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-08-14 09:13:57 -0400
commitd0b69609dc50b6bf2637cf74e6f97c251adc65ed (patch)
treeb834227a9d1e9fe1083164cff5891547139e8139
parentfeff1f2fea3fc7ee055e46d0fbdb2d25ad2b14c4 (diff)
mac80211: sequence number micro-optimisation
There's no need to mask the variable with 0xFFF0 since we ever only use it as a u16 and the lowest four bits can't ever be non-zero. The compiler cannot infer the latter, and therefore has to emit code to do the masking. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--net/mac80211/tx.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 588c18a60de..0c24a4b1450 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -700,7 +700,6 @@ ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
/* for pure STA mode without beacons, we can do it */
hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
tx->sdata->sequence_number += 0x10;
- tx->sdata->sequence_number &= IEEE80211_SCTL_SEQ;
return TX_CONTINUE;
}