diff --git a/drivers/dahdi/dahdi-base.c b/drivers/dahdi/dahdi-base.c
index bcd6147..d05eff9 100644
--- a/drivers/dahdi/dahdi-base.c
+++ b/drivers/dahdi/dahdi-base.c
@@ -7943,7 +7943,7 @@ static inline void __dahdi_process_getaudio_chunk(struct dahdi_chan *ss, unsigne
 			memset(getlin, 0, DAHDI_CHUNKSIZE * sizeof(short));
 			txb[0] = DAHDI_LIN2X(0, ms);
 			memset(txb + 1, txb[0], DAHDI_CHUNKSIZE - 1);
-			/* fall through to normal conf mode */
+			/* fallthrough */
 		case DAHDI_CONF_CONF:	/* Normal conference mode */
 			if (is_pseudo_chan(ms)) /* if pseudo-channel */
 			   {
@@ -8506,7 +8506,7 @@ static void __dahdi_hooksig_pvt(struct dahdi_chan *chan, enum dahdi_rxsig rxsig)
 			break;
 		}
 #endif
-		/* fall through intentionally */
+		/* fallthrough */
 	   case DAHDI_SIG_FXSGS:  /* FXS Groundstart */
 		if (rxsig == DAHDI_RXSIG_ONHOOK) {
 			chan->ringdebtimer = RING_DEBOUNCE_TIME;
@@ -8525,7 +8525,7 @@ static void __dahdi_hooksig_pvt(struct dahdi_chan *chan, enum dahdi_rxsig rxsig)
 				chan->gotgs = 1;
 			}
 		}
-		/* fall through intentionally */
+		/* fallthrough */
 	   case DAHDI_SIG_FXOLS: /* FXO Loopstart */
 	   case DAHDI_SIG_FXOKS: /* FXO Kewlstart */
 		switch(rxsig) {
diff --git a/drivers/dahdi/wcaxx-base.c b/drivers/dahdi/wcaxx-base.c
index 8903e5d..04b23a9 100644
--- a/drivers/dahdi/wcaxx-base.c
+++ b/drivers/dahdi/wcaxx-base.c
@@ -1452,11 +1452,13 @@ wcaxx_check_battery_lost(struct wcaxx *wc, struct wcaxx_module *const mod)
 		break;
 	case BATTERY_UNKNOWN:
 		mod_hooksig(wc, mod, DAHDI_RXSIG_ONHOOK);
+		/* fallthrough */
 	case BATTERY_PRESENT:
 		fxo->battery_state = BATTERY_DEBOUNCING_LOST;
 		fxo->battdebounce_timer = wc->framecount + battdebounce;
 		break;
 	case BATTERY_DEBOUNCING_LOST_FROM_PRESENT_ALARM:
+		/* fallthrough */
 	case BATTERY_DEBOUNCING_LOST: /* Intentional drop through */
 		if (time_after(wc->framecount, fxo->battdebounce_timer)) {
 			if (debug) {
@@ -1507,7 +1509,8 @@ wcaxx_check_battery_present(struct wcaxx *wc, struct wcaxx_module *const mod)
 
 	switch (fxo->battery_state) {
 	case BATTERY_DEBOUNCING_PRESENT_FROM_LOST_ALARM:
-	case BATTERY_DEBOUNCING_PRESENT: /* intentional drop through */
+		/* fallthrough */
+	case BATTERY_DEBOUNCING_PRESENT: 
 		if (time_after(wc->framecount, fxo->battdebounce_timer)) {
 			if (debug) {
 				dev_info(&wc->xb.pdev->dev,
@@ -1560,7 +1563,8 @@ wcaxx_check_battery_present(struct wcaxx *wc, struct wcaxx_module *const mod)
 		break;
 	case BATTERY_UNKNOWN:
 		mod_hooksig(wc, mod, DAHDI_RXSIG_OFFHOOK);
-	case BATTERY_LOST: /* intentional drop through */
+		/* fallthrough */
+	case BATTERY_LOST:
 		fxo->battery_state = BATTERY_DEBOUNCING_PRESENT;
 		fxo->battdebounce_timer = wc->framecount + battdebounce;
 		break;
diff --git a/drivers/dahdi/wctdm24xxp/base.c b/drivers/dahdi/wctdm24xxp/base.c
index 16bf384..f106a19 100644
--- a/drivers/dahdi/wctdm24xxp/base.c
+++ b/drivers/dahdi/wctdm24xxp/base.c
@@ -1955,12 +1955,14 @@ wctdm_check_battery_lost(struct wctdm *wc, struct wctdm_module *const mod)
 		break;
 	case BATTERY_UNKNOWN:
 		mod_hooksig(wc, mod, DAHDI_RXSIG_ONHOOK);
+		/* fallthrough */
 	case BATTERY_PRESENT:
 		fxo->battery_state = BATTERY_DEBOUNCING_LOST;
 		fxo->battdebounce_timer = wc->framecount + battdebounce;
 		break;
 	case BATTERY_DEBOUNCING_LOST_FROM_PRESENT_ALARM:
-	case BATTERY_DEBOUNCING_LOST: /* Intentional drop through */
+		/* fallthrough */
+	case BATTERY_DEBOUNCING_LOST:
 		if (time_after(wc->framecount, fxo->battdebounce_timer)) {
 			if (debug) {
 				dev_info(&wc->vb.pdev->dev,
@@ -2063,7 +2065,8 @@ wctdm_check_battery_present(struct wctdm *wc, struct wctdm_module *const mod)
 		break;
 	case BATTERY_UNKNOWN:
 		mod_hooksig(wc, mod, DAHDI_RXSIG_OFFHOOK);
-	case BATTERY_LOST: /* intentional drop through */
+		/* fallthrough */
+	case BATTERY_LOST:
 		fxo->battery_state = BATTERY_DEBOUNCING_PRESENT;
 		fxo->battdebounce_timer = wc->framecount + battdebounce;
 		break;