From d0b69609dc50b6bf2637cf74e6f97c251adc65ed Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 10 Aug 2009 16:02:40 +0200 Subject: [PATCH] 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 Signed-off-by: John W. Linville --- net/mac80211/tx.c | 1 - 1 file changed, 1 deletion(-) 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; }