ath9k: make private driver rate tables const

On x86 this allows us to do the following small savings:
shave off 23 % off of the module's data, and
shave off 6  % off of the module's text.

We save 456 bytes, for those counting.

$ size ath9k.ko
   text    data     bss     dec     hex filename
 250794    3628    1600  256022   3e816 ath9k.ko
$ size ath9k-old.ko
   text    data     bss     dec     hex filename
 239114   15308    1600  256022   3e816 ath9k-old.ko

$ du -b ath9k.ko
4034244 ath9k.ko
$ du -b ath9k-old.ko
4033788 ath9k-old.ko

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 501493ffc3a7..41c42824a5ca 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -434,7 +434,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
                            struct ath_atx_tid *tid)
 {
-        struct ath_rate_table *rate_table = sc->cur_rate_table;
+        const struct ath_rate_table *rate_table = sc->cur_rate_table;
         struct sk_buff *skb;
         struct ieee80211_tx_info *tx_info;
         struct ieee80211_tx_rate *rates;
@@ -497,7 +497,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
 static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
                                   struct ath_buf *bf, u16 frmlen)
 {
-        struct ath_rate_table *rt = sc->cur_rate_table;
+        const struct ath_rate_table *rt = sc->cur_rate_table;
         struct sk_buff *skb = bf->bf_mpdu;
         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
         u32 nsymbits, nsymbols, mpdudensity;
@@ -1407,7 +1407,7 @@ static int setup_tx_flags(struct ath_softc *sc, struct sk_buff *skb,
 static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
                             int width, int half_gi, bool shortPreamble)
 {
-        struct ath_rate_table *rate_table = sc->cur_rate_table;
+        const struct ath_rate_table *rate_table = sc->cur_rate_table;
         u32 nbits, nsymbits, duration, nsymbols;
         u8 rc;
         int streams, pktlen;
@@ -1439,7 +1439,7 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
 
 static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
 {
-        struct ath_rate_table *rt = sc->cur_rate_table;
+        const struct ath_rate_table *rt = sc->cur_rate_table;
         struct ath9k_11n_rate_series series[4];
         struct sk_buff *skb;
         struct ieee80211_tx_info *tx_info;