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| author | Johannes Berg <johannes@sipsolutions.net> | 2009-08-10 16:02:40 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-08-14 09:13:57 -0400 |
| commit | d0b69609dc50b6bf2637cf74e6f97c251adc65ed (patch) | |
| tree | b834227a9d1e9fe1083164cff5891547139e8139 /net/mac80211/tx.c | |
| parent | feff1f2fea3fc7ee055e46d0fbdb2d25ad2b14c4 (diff) | |
| download | lwn-d0b69609dc50b6bf2637cf74e6f97c251adc65ed.tar.gz lwn-d0b69609dc50b6bf2637cf74e6f97c251adc65ed.zip | |
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>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 588c18a60de4..0c24a4b14505 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; } |