diff --git a/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c b/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c
--- a/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c
+++ b/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c
@@ -6070,7 +6070,6 @@
 	struct bwn_softc *sc = mac->mac_sc;
 	struct bwn_ppr *ppr = &nphy->tx_pwr_max_ppr;
 	uint8_t max; /* qdBm */
-	bool tx_pwr_state;
 
 	if (nphy->tx_pwr_last_recalc_freq == bwn_get_centre_freq(mac) &&
 	    nphy->tx_pwr_last_recalc_limit == phy->txpower)
@@ -6108,7 +6107,6 @@
 	bwn_ppr_apply_min(mac, ppr, INT_TO_Q52(8));
 
 	/* Apply */
-	tx_pwr_state = nphy->txpwrctrl;
 	bwn_mac_suspend(mac);
 	bwn_nphy_tx_power_ctl_setup(mac);
 	if (bhnd_get_hwrev(sc->sc_dev) == 11 || bhnd_get_hwrev(sc->sc_dev) == 12) {
@@ -6214,7 +6212,6 @@
 	struct bwn_nphy_txgains target;
 	int error;
 	uint16_t tmp;
-	bwn_band_t tmp2;
 	bool do_rssi_cal;
 
 	uint16_t clip[2];
@@ -6308,7 +6305,6 @@
 		BWN_PHY_WRITE(mac, BWN_NPHY_DUP40_BL, 0x9A4);
 	}
 
-	tmp2 = bwn_current_band(mac);
 	if (bwn_nphy_ipa(mac)) {
 		BWN_PHY_SET(mac, BWN_NPHY_PAPD_EN0, 0x1);
 		BWN_PHY_SETMASK(mac, BWN_NPHY_EPS_TABLE_ADJ0, 0x007F,
diff --git a/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_tables.c b/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_tables.c
--- a/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_tables.c
+++ b/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_tables.c
@@ -3454,10 +3454,15 @@
 
 void bwn_ntab_write(struct bwn_mac *mac, uint32_t offset, uint32_t value)
 {
-	uint32_t type, orig;
+	uint32_t type;
+#ifdef INVARIANTS
+	uint32_t orig;
+#endif
 
 	type = offset & BWN_NTAB_TYPEMASK;
+#ifdef INVARIANTS
 	orig = offset;
+#endif
 	offset &= 0xFFFF;
 
 	switch (type) {
@@ -3494,12 +3499,16 @@
 {
 	struct bwn_softc *sc = mac->mac_sc;
 	uint32_t type, value;
+#ifdef INVARIANTS
 	uint32_t orig;
+#endif
 	const uint8_t *data = _data;
 	unsigned int i;
 
 	type = offset & BWN_NTAB_TYPEMASK;
+#ifdef INVARIANTS
 	orig = offset;
+#endif
 	offset &= ~BWN_NTAB_TYPEMASK;
 	KASSERT(offset <= 0xFFFF, ("%s: invalid offset (%d)\n",
 	    __func__, offset));