iwlwifi: suppress unused variable warning when compiling w/o IWLWIFI_DEBUG

This patch adds __maybe_unused attribute to priv variables used in
functions that used it solely for debug printouts

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Cc: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-3945-rs.c

@@ -183,7 +183,7 @@ static int iwl3945_rate_scale_flush_windows(struct iwl3945_rs_sta *rs_sta)
 	int unflushed = 0;
 	int i;
 	unsigned long flags;
-	struct iwl_priv *priv = rs_sta->priv;
+	struct iwl_priv *priv __maybe_unused = rs_sta->priv;
 
 	/*
 	 * For each rate, if we have collected data on that rate
@@ -216,7 +216,7 @@ static int iwl3945_rate_scale_flush_windows(struct iwl3945_rs_sta *rs_sta)
 static void iwl3945_bg_rate_scale_flush(unsigned long data)
 {
 	struct iwl3945_rs_sta *rs_sta = (void *)data;
-	struct iwl_priv *priv = rs_sta->priv;
+	struct iwl_priv *priv __maybe_unused = rs_sta->priv;
 	int unflushed = 0;
 	unsigned long flags;
 	u32 packet_count, duration, pps;
@@ -290,7 +290,7 @@ static void iwl3945_collect_tx_data(struct iwl3945_rs_sta *rs_sta,
 {
 	unsigned long flags;
 	s32 fail_count;
-	struct iwl_priv *priv = rs_sta->priv;
+	struct iwl_priv *priv __maybe_unused = rs_sta->priv;
 
 	if (!retries) {
 		IWL_DEBUG_RATE("leave: retries == 0 -- should be at least 1\n");
@@ -438,7 +438,7 @@ static void rs_free_sta(void *iwl_priv, struct ieee80211_sta *sta,
 {
 	struct iwl3945_sta_priv *psta = (void *) sta->drv_priv;
 	struct iwl3945_rs_sta *rs_sta = priv_sta;
-	struct iwl_priv *priv = rs_sta->priv;
+	struct iwl_priv *priv __maybe_unused = rs_sta->priv;
 
 	psta->rs_sta = NULL;
 
@@ -556,7 +556,7 @@ static u16 iwl3945_get_adjacent_rate(struct iwl3945_rs_sta *rs_sta,
 {
 	u8 high = IWL_RATE_INVALID;
 	u8 low = IWL_RATE_INVALID;
-	struct iwl_priv *priv = rs_sta->priv;
+	struct iwl_priv *priv __maybe_unused = rs_sta->priv;
 
 	/* 802.11A walks to the next literal adjacent rate in
 	 * the rate table */

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -5270,8 +5270,8 @@ static ssize_t store_antenna(struct device *d,
 			     struct device_attribute *attr,
 			     const char *buf, size_t count)
 {
+	struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
 	int ant;
-	struct iwl_priv *priv = dev_get_drvdata(d);
 
 	if (count == 0)
 		return 0;