Commit d0b69609 authored Aug 10, 2009 by Johannes Berg Committed by John W. Linville Aug 14, 2009

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>

parent feff1f2f

net/mac80211/tx.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}