trxcon/scheduler: constify Downlink burst bits where possible

Change-Id: Ib3e3a0a5b4551126b1a9439000d4438c58a6a90a

src/host/trxcon/sched_lchan_desc.c

@@ -31,35 +31,35 @@
 /* Forward declaration of handlers */
 int rx_data_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas);
+	const sbit_t *bits, const struct trx_meas_set *meas);
 
 int tx_data_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid);
 
 int rx_sch_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas);
+	const sbit_t *bits, const struct trx_meas_set *meas);
 
 int tx_rach_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid);
 
 int rx_tchf_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas);
+	const sbit_t *bits, const struct trx_meas_set *meas);
 
 int tx_tchf_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid);
 
 int rx_tchh_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas);
+	const sbit_t *bits, const struct trx_meas_set *meas);
 
 int tx_tchh_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid);
 
 int rx_pdtch_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas);
+	const sbit_t *bits, const struct trx_meas_set *meas);
 
 int tx_pdtch_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid);

src/host/trxcon/sched_lchan_pdtch.c

@@ -42,7 +42,7 @@
 
 int rx_pdtch_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas)
+	const sbit_t *bits, const struct trx_meas_set *meas)
 {
 	const struct trx_lchan_desc *lchan_desc;
 	uint8_t l2[GPRS_L2_MAX_LEN], *mask;

src/host/trxcon/sched_lchan_sch.c

@@ -70,7 +70,7 @@ static void decode_sb(struct gsm_time *time, uint8_t *bsic, uint8_t *sb_info)
 
 int rx_sch_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas)
+	const sbit_t *bits, const struct trx_meas_set *meas)
 {
 	sbit_t payload[2 * 39];
 	struct gsm_time time;

src/host/trxcon/sched_lchan_tchf.c

@@ -44,7 +44,7 @@
 
 int rx_tchf_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas)
+	const sbit_t *bits, const struct trx_meas_set *meas)
 {
 	const struct trx_lchan_desc *lchan_desc;
 	int n_errors = -1, n_bits_total, rc;

src/host/trxcon/sched_lchan_tchh.c

@@ -200,7 +200,7 @@ uint32_t sched_tchh_block_dl_first_fn(enum trx_lchan_type chan,
 
 int rx_tchh_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas)
+	const sbit_t *bits, const struct trx_meas_set *meas)
 {
 	const struct trx_lchan_desc *lchan_desc;
 	int n_errors = -1, n_bits_total, rc;

src/host/trxcon/sched_lchan_xcch.c

@@ -42,7 +42,7 @@
 
 int rx_data_fn(struct trx_instance *trx, struct trx_ts *ts,
 	struct trx_lchan_state *lchan, uint32_t fn, uint8_t bid,
-	sbit_t *bits, const struct trx_meas_set *meas)
+	const sbit_t *bits, const struct trx_meas_set *meas)
 {
 	const struct trx_lchan_desc *lchan_desc;
 	uint8_t l2[GSM_MACBLOCK_LEN], *mask;

src/host/trxcon/sched_trx.c

@@ -637,8 +637,7 @@ static int subst_frame_loss(struct trx_lchan_state *lchan,
 		return -EIO;
 	}
 
-	/* TODO: make bits constant */
+	static const sbit_t bits[148] = { 0 };
-	static sbit_t bits[148] = { 0 };
 	struct trx_meas_set fake_meas = {
 		.fn = lchan->tdma.last_proc,
 		.rssi = -120,

src/host/trxcon/sched_trx.h

@@ -99,7 +99,7 @@ enum trx_lchan_type {
 
 typedef int trx_lchan_rx_func(struct trx_instance *trx,
 	struct trx_ts *ts, struct trx_lchan_state *lchan,
-	uint32_t fn, uint8_t bid, sbit_t *bits,
+	uint32_t fn, uint8_t bid, const sbit_t *bits,
 	const struct trx_meas_set *meas);
 
 typedef int trx_lchan_tx_func(struct trx_instance *trx,