Replace various spelling with FALLTHROUGH which is lint()able

55 files changed, 103 insertions, 105 deletions

diff --git a/sys/alpha/alpha/db_disasm.c b/sys/alpha/alpha/db_disasm.c
index 5cdfc18..507a73e 100644
--- a/sys/alpha/alpha/db_disasm.c
+++ b/sys/alpha/alpha/db_disasm.c
@@ -1012,7 +1012,7 @@ foperate:
 	case op_sts:
 	case op_stt:
 		fstore = TRUE;
-		/* fall through */
+		/* FALLTHROUGH */
 	case op_ldl:
 	case op_ldq:
 	case op_ldl_l:
diff --git a/sys/alpha/alpha/trap.c b/sys/alpha/alpha/trap.c
index 1bac257..3d132cc 100644
--- a/sys/alpha/alpha/trap.c
+++ b/sys/alpha/alpha/trap.c
@@ -404,7 +404,7 @@ trap(a0, a1, a2, entry, framep)
 				ucode =  a0;	/* exception summary */
 				break;
 			}
-			/* FALLTHROUTH */
+			/* FALLTHROUGH */
 		case ALPHA_IF_CODE_BPT:
 		case ALPHA_IF_CODE_BUGCHK:
 			if (td->td_md.md_flags & (MDTD_STEP1|MDTD_STEP2)) {
diff --git a/sys/amd64/amd64/trap.c b/sys/amd64/amd64/trap.c
index 8077d1f..102d54b 100644
--- a/sys/amd64/amd64/trap.c
+++ b/sys/amd64/amd64/trap.c
@@ -318,7 +318,7 @@ trap(frame)
 					goto user;
 				break;
 			}
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 
 		case T_SEGNPFLT:	/* segment not present fault */
 		case T_TSSFLT:		/* invalid TSS fault */
@@ -593,7 +593,7 @@ trap(frame)
 				goto out;
 			}
 			/*
-			 * Fall through (TRCTRAP kernel mode, kernel address)
+			 * FALLTHROUGH (TRCTRAP kernel mode, kernel address)
 			 */
 		case T_BPTFLT:
 			/*
@@ -635,7 +635,7 @@ trap(frame)
 				goto out;
 			} else if (panic_on_nmi == 0)
 				goto out;
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 #endif /* POWERFAIL_NMI */
 #endif /* DEV_ISA */
 		}
diff --git a/sys/cam/cam_xpt.c b/sys/cam/cam_xpt.c
index 81b8031..9118aa9 100644
--- a/sys/cam/cam_xpt.c
+++ b/sys/cam/cam_xpt.c
@@ -6456,7 +6456,7 @@ xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
 			  || (inq_data->flags & SID_WBus32) != 0)
 			 && (cpi.hba_inquiry & PI_WIDE_32) != 0)
 				break;
-			/* Fall Through to 16-bit */
+			/* FALLTHROUGH to 16-bit */
 		case MSG_EXT_WDTR_BUS_16_BIT:
 			if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
 			  || (inq_data->flags & SID_WBus16) != 0)
@@ -6464,7 +6464,7 @@ xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
 				cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 				break;
 			}
-			/* Fall Through to 8-bit */
+			/* FALLTHROUGH to 8-bit */
 		default: /* New bus width?? */
 		case MSG_EXT_WDTR_BUS_8_BIT:
 			/* All targets can do this */
diff --git a/sys/dev/atkbdc/atkbd.c b/sys/dev/atkbdc/atkbd.c
index d9d7b4a..dcc6ae8 100644
--- a/sys/dev/atkbdc/atkbd.c
+++ b/sys/dev/atkbdc/atkbd.c
@@ -831,7 +831,7 @@ atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 				state->ks_state &= ~LOCK_MASK;
 				state->ks_state |= KBD_LED_VAL(kbd);
 			}
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 		case K_RAW:
 		case K_CODE:
 			if (state->ks_mode != *(int *)arg) {
@@ -915,7 +915,7 @@ atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
 		state->ks_accents = 0;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	default:
 		splx(s);
 		return genkbd_commonioctl(kbd, cmd, arg);
diff --git a/sys/dev/atkbdc/psm.c b/sys/dev/atkbdc/psm.c
index 9afb9f3..5e95cb5 100644
--- a/sys/dev/atkbdc/psm.c
+++ b/sys/dev/atkbdc/psm.c
@@ -645,7 +645,7 @@ doinitialize(struct psm_softc *sc, mousemode_t *mode)
 	if (verbose)
 	    log(LOG_DEBUG, "psm%d: strange result for test aux port (%d).\n",
 	        sc->unit, i);
-	/* fall though */
+	/* FALLTHROUGH */
     case 0:	/* no error */
     	break;
     case -1: 	/* time out */
@@ -1031,7 +1031,7 @@ psmprobe(device_t dev)
         if (verbose)
 	    printf("psm%d: strange result for test aux port (%d).\n",
 	        unit, i);
-	/* fall though */
+	/* FALLTHROUGH */
     case 0:        /* no error */
         break;
     case -1:        /* time out */
@@ -2174,7 +2174,7 @@ psmintr(void *arg)
 		    break;
 		case 0:
 		    /* device type packet - shouldn't happen */
-		    /* FALL THROUGH */
+		    /* FALLTHROUGH */
 		default:
 		    x = y = 0;
 		    ms.button = ms.obutton;
diff --git a/sys/dev/de/if_de.c b/sys/dev/de/if_de.c
index a48d93c..dc10916 100644
--- a/sys/dev/de/if_de.c
+++ b/sys/dev/de/if_de.c
@@ -1336,7 +1336,7 @@ tulip_mii_autonegotiate(
 	    sc->tulip_probe_timeout = 3000;
 	    sc->tulip_intrmask |= TULIP_STS_ABNRMLINTR|TULIP_STS_NORMALINTR;
 	    sc->tulip_probe_state = TULIP_PROBE_PHYRESET;
-	    /* FALL THROUGH */
+	    /* FALLTHROUGH */
 	}
         case TULIP_PROBE_PHYRESET: {
 	    u_int32_t status;
@@ -1378,7 +1378,7 @@ tulip_mii_autonegotiate(
 #endif
 	    sc->tulip_probe_state = TULIP_PROBE_PHYAUTONEG;
 	    sc->tulip_probe_timeout = 3000;
-	    /* FALL THROUGH */
+	    /* FALLTHROUGH */
 	}
         case TULIP_PROBE_PHYAUTONEG: {
 	    u_int32_t status = tulip_mii_readreg(sc, phyaddr, PHYREG_STATUS);
diff --git a/sys/dev/fb/vga.c b/sys/dev/fb/vga.c
index 8fc1fd2..ba876fc 100644
--- a/sys/dev/fb/vga.c
+++ b/sys/dev/fb/vga.c
@@ -1537,7 +1537,7 @@ vga_set_mode(video_adapter_t *adp, int mode)
 #ifdef VGA_WIDTH90
     case M_VGA_C90x60: case M_VGA_M90x60:
 	set_width90(&params);
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 #endif
     case M_VGA_C80x60: case M_VGA_M80x60:
 	params.regs[2]  = 0x08;
@@ -1547,7 +1547,7 @@ vga_set_mode(video_adapter_t *adp, int mode)
 #ifdef VGA_WIDTH90
     case M_VGA_C90x30: case M_VGA_M90x30:
 	set_width90(&params);
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 #endif
     case M_VGA_C80x30: case M_VGA_M80x30:
 	params.regs[19] = 0x4f;
@@ -1564,7 +1564,7 @@ special_480l:
 #ifdef VGA_WIDTH90
     case M_VGA_C90x43: case M_VGA_M90x43:
 	set_width90(&params);
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 #endif
     case M_ENH_C80x43: case M_ENH_B80x43:
 	params.regs[28] = 87;
@@ -1573,7 +1573,7 @@ special_480l:
 #ifdef VGA_WIDTH90
     case M_VGA_C90x50: case M_VGA_M90x50:
 	set_width90(&params);
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 #endif
     case M_VGA_C80x50: case M_VGA_M80x50:
 special_80x50:
@@ -1584,7 +1584,7 @@ special_80x50:
 #ifdef VGA_WIDTH90
     case M_VGA_C90x25: case M_VGA_M90x25:
 	set_width90(&params);
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 #endif
     case M_VGA_C40x25: case M_VGA_C80x25:
     case M_VGA_M80x25:
diff --git a/sys/dev/kbd/atkbd.c b/sys/dev/kbd/atkbd.c
index d9d7b4a..dcc6ae8 100644
--- a/sys/dev/kbd/atkbd.c
+++ b/sys/dev/kbd/atkbd.c
@@ -831,7 +831,7 @@ atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 				state->ks_state &= ~LOCK_MASK;
 				state->ks_state |= KBD_LED_VAL(kbd);
 			}
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 		case K_RAW:
 		case K_CODE:
 			if (state->ks_mode != *(int *)arg) {
@@ -915,7 +915,7 @@ atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
 		state->ks_accents = 0;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	default:
 		splx(s);
 		return genkbd_commonioctl(kbd, cmd, arg);
diff --git a/sys/dev/pdq/pdq.c b/sys/dev/pdq/pdq.c
index fd9aa00..2cebf0a 100644
--- a/sys/dev/pdq/pdq.c
+++ b/sys/dev/pdq/pdq.c
@@ -1149,7 +1149,7 @@ pdq_stop(
 	    pdq_do_port_control(csrs, PDQ_PCTL_SUB_CMD);
 	    state = PDQ_PSTS_ADAPTER_STATE(PDQ_CSR_READ(csrs, csr_port_status));
 	    PDQ_ASSERT(state == PDQS_DMA_AVAILABLE);
-	    /* FALL THROUGH */
+	    /* FALLTHROUGH */
 	}
 	case PDQS_DMA_AVAILABLE: {
 	    PDQ_CSR_WRITE(csrs, csr_port_data_a, 0);
@@ -1157,7 +1157,7 @@ pdq_stop(
 	    pdq_do_port_control(csrs, PDQ_PCTL_DMA_UNINIT);
 	    state = PDQ_PSTS_ADAPTER_STATE(PDQ_CSR_READ(csrs, csr_port_status));
 	    PDQ_ASSERT(state == PDQS_DMA_UNAVAILABLE);
-	    /* FALL THROUGH */
+	    /* FALLTHROUGH */
 	}
 	case PDQS_DMA_UNAVAILABLE: {
 	    break;
diff --git a/sys/dev/ppbus/ppi.c b/sys/dev/ppbus/ppi.c
index 19b5494..d2cf4fd 100644
--- a/sys/dev/ppbus/ppi.c
+++ b/sys/dev/ppbus/ppi.c
@@ -342,7 +342,7 @@ ppiread(dev_t dev, struct uio *uio, int ioflag)
 	switch (ppb_1284_get_state(ppbus)) {
 	case PPB_PERIPHERAL_IDLE:
 		ppb_peripheral_terminate(ppbus, 0);
-		/* fall throught */
+		/* FALLTHROUGH */
 
 	case PPB_FORWARD_IDLE:
 		/* if can't negociate NIBBLE mode then try BYTE mode,
diff --git a/sys/dev/scd/scd.c b/sys/dev/scd/scd.c
index 4a003d2..e26d279 100644
--- a/sys/dev/scd/scd.c
+++ b/sys/dev/scd/scd.c
@@ -1357,7 +1357,7 @@ send_cmd(u_int unit, u_char cmd, u_int nargs, ...)
 	switch ((rc = inb(reg)) & 0xf0) {
 	case 0x20:
 		rc = inb(reg);
-		/* FALL TROUGH */
+		/* FALLTHROUGH */
 	case 0x50:
 		XDEBUG(1, ("scd%d: DEBUG: send_cmd: drive_error=0x%x\n", unit, rc));
 		return -rc;
diff --git a/sys/dev/syscons/scvidctl.c b/sys/dev/syscons/scvidctl.c
index 9e142d0..8a7656b 100644
--- a/sys/dev/syscons/scvidctl.c
+++ b/sys/dev/syscons/scvidctl.c
@@ -608,7 +608,7 @@ sc_vid_ioctl(struct tty *tp, u_long cmd, caddr_t data, int flag, struct thread *
     case SW_TEXT_80x25:	case SW_TEXT_80x30:
     case SW_TEXT_80x43: case SW_TEXT_80x50:
     case SW_TEXT_80x60:
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 
     /* VGA TEXT MODES */
     case SW_VGA_C40x25:
@@ -690,7 +690,7 @@ sc_vid_ioctl(struct tty *tp, u_long cmd, caddr_t data, int flag, struct thread *
 	    (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
 #endif
 
-	    /* FALL THROUGH */
+	    /* FALLTHROUGH */
 
 	case KD_TEXT1:  	/* switch to TEXT (known) mode */
 	    /*
diff --git a/sys/dev/usb/ukbd.c b/sys/dev/usb/ukbd.c
index e2fc59e..775a04d 100644
--- a/sys/dev/usb/ukbd.c
+++ b/sys/dev/usb/ukbd.c
@@ -1171,7 +1171,7 @@ ukbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 				state->ks_state &= ~LOCK_MASK;
 				state->ks_state |= KBD_LED_VAL(kbd);
 			}
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 		case K_RAW:
 		case K_CODE:
 			if (state->ks_mode != *(int *)arg) {
@@ -1246,7 +1246,7 @@ ukbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
 		state->ks_accents = 0;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	default:
 		splx(s);
 		return genkbd_commonioctl(kbd, cmd, arg);
diff --git a/sys/fs/cd9660/cd9660_rrip.c b/sys/fs/cd9660/cd9660_rrip.c
index fdcb4f6..88f47fa 100644
--- a/sys/fs/cd9660/cd9660_rrip.c
+++ b/sys/fs/cd9660/cd9660_rrip.c
@@ -181,7 +181,7 @@ cd9660_rrip_slink(p,ana)
 
 		case ISO_SUSP_CFLAG_CONTINUE:
 			cont = 1;
-			/* fall thru */
+			/* FALLTHROUGH */
 		case 0:
 			/* Inserting component */
 			wlen = isonum_711(pcomp->clen);
@@ -253,7 +253,7 @@ cd9660_rrip_altname(p,ana)
 
 	case ISO_SUSP_CFLAG_CONTINUE:
 		cont = 1;
-		/* fall thru */
+		/* FALLTHROUGH */
 	case 0:
 		/* Inserting component */
 		wlen = isonum_711(p->h.length) - 5;
@@ -297,7 +297,7 @@ cd9660_rrip_defname(isodir,ana)
 		break;
 	case 1:
 		*ana->outlen = 2;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	case 0:
 		/* outlen is 1 already */
 		strcpy(ana->outbuf,"..");
diff --git a/sys/i386/i386/trap.c b/sys/i386/i386/trap.c
index 8077d1f..102d54b 100644
--- a/sys/i386/i386/trap.c
+++ b/sys/i386/i386/trap.c
@@ -318,7 +318,7 @@ trap(frame)
 					goto user;
 				break;
 			}
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 
 		case T_SEGNPFLT:	/* segment not present fault */
 		case T_TSSFLT:		/* invalid TSS fault */
@@ -593,7 +593,7 @@ trap(frame)
 				goto out;
 			}
 			/*
-			 * Fall through (TRCTRAP kernel mode, kernel address)
+			 * FALLTHROUGH (TRCTRAP kernel mode, kernel address)
 			 */
 		case T_BPTFLT:
 			/*
@@ -635,7 +635,7 @@ trap(frame)
 				goto out;
 			} else if (panic_on_nmi == 0)
 				goto out;
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 #endif /* POWERFAIL_NMI */
 #endif /* DEV_ISA */
 		}
diff --git a/sys/i386/ibcs2/ibcs2_signal.c b/sys/i386/ibcs2/ibcs2_signal.c
index 12bd038..0084cbe 100644
--- a/sys/i386/ibcs2/ibcs2_signal.c
+++ b/sys/i386/ibcs2/ibcs2_signal.c
@@ -264,7 +264,7 @@ ibcs2_sigsys(td, uap)
 			sa.sa_flags = 0;
 			goto ibcs2_sigset;
 		}
-		/* else fallthrough to sighold */
+		/* else FALLTHROUGH to sighold */
 
 	case IBCS2_SIGHOLD_MASK:
 		{
diff --git a/sys/i386/isa/scd.c b/sys/i386/isa/scd.c
index 4a003d2..e26d279 100644
--- a/sys/i386/isa/scd.c
+++ b/sys/i386/isa/scd.c
@@ -1357,7 +1357,7 @@ send_cmd(u_int unit, u_char cmd, u_int nargs, ...)
 	switch ((rc = inb(reg)) & 0xf0) {
 	case 0x20:
 		rc = inb(reg);
-		/* FALL TROUGH */
+		/* FALLTHROUGH */
 	case 0x50:
 		XDEBUG(1, ("scd%d: DEBUG: send_cmd: drive_error=0x%x\n", unit, rc));
 		return -rc;
diff --git a/sys/i386/isa/stallion.c b/sys/i386/isa/stallion.c
index ca766c4..77db37f 100644
--- a/sys/i386/isa/stallion.c
+++ b/sys/i386/isa/stallion.c
@@ -2676,7 +2676,7 @@ static int stl_initeio(stlbrd_t *brdp)
 	switch (status & EIO_IDBITMASK) {
 	case EIO_8PORTM:
 		brdp->clk = EIO_CLK8M;
-		/* fall thru */
+		/* FALLTHROUGH */
 	case EIO_8PORTRS:
 	case EIO_8PORTDI:
 		brdp->nrports = 8;
diff --git a/sys/i4b/driver/i4b_rbch.c b/sys/i4b/driver/i4b_rbch.c
index e948925..ae5ed80 100644
--- a/sys/i4b/driver/i4b_rbch.c
+++ b/sys/i4b/driver/i4b_rbch.c
@@ -507,7 +507,7 @@ i4brbchioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
 				i4b_l4_dialoutnumber(BDRV_RBCH, unit, l, (char *)data);
 				break;
 			}
-			/* fall through to SDTR */
+			/* FALLTHROUGH to SDTR */
 		}
 
 		case TIOCSDTR:	/* Set DTR */
diff --git a/sys/isa/psm.c b/sys/isa/psm.c
index 9afb9f3..5e95cb5 100644
--- a/sys/isa/psm.c
+++ b/sys/isa/psm.c
@@ -645,7 +645,7 @@ doinitialize(struct psm_softc *sc, mousemode_t *mode)
 	if (verbose)
 	    log(LOG_DEBUG, "psm%d: strange result for test aux port (%d).\n",
 	        sc->unit, i);
-	/* fall though */
+	/* FALLTHROUGH */
     case 0:	/* no error */
     	break;
     case -1: 	/* time out */
@@ -1031,7 +1031,7 @@ psmprobe(device_t dev)
         if (verbose)
 	    printf("psm%d: strange result for test aux port (%d).\n",
 	        unit, i);
-	/* fall though */
+	/* FALLTHROUGH */
     case 0:        /* no error */
         break;
     case -1:        /* time out */
@@ -2174,7 +2174,7 @@ psmintr(void *arg)
 		    break;
 		case 0:
 		    /* device type packet - shouldn't happen */
-		    /* FALL THROUGH */
+		    /* FALLTHROUGH */
 		default:
 		    x = y = 0;
 		    ms.button = ms.obutton;
diff --git a/sys/isofs/cd9660/cd9660_rrip.c b/sys/isofs/cd9660/cd9660_rrip.c
index fdcb4f6..88f47fa 100644
--- a/sys/isofs/cd9660/cd9660_rrip.c
+++ b/sys/isofs/cd9660/cd9660_rrip.c
@@ -181,7 +181,7 @@ cd9660_rrip_slink(p,ana)
 
 		case ISO_SUSP_CFLAG_CONTINUE:
 			cont = 1;
-			/* fall thru */
+			/* FALLTHROUGH */
 		case 0:
 			/* Inserting component */
 			wlen = isonum_711(pcomp->clen);
@@ -253,7 +253,7 @@ cd9660_rrip_altname(p,ana)
 
 	case ISO_SUSP_CFLAG_CONTINUE:
 		cont = 1;
-		/* fall thru */
+		/* FALLTHROUGH */
 	case 0:
 		/* Inserting component */
 		wlen = isonum_711(p->h.length) - 5;
@@ -297,7 +297,7 @@ cd9660_rrip_defname(isodir,ana)
 		break;
 	case 1:
 		*ana->outlen = 2;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	case 0:
 		/* outlen is 1 already */
 		strcpy(ana->outbuf,"..");
diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c
index 37dc894..db4e4d4 100644
--- a/sys/kern/kern_descrip.c
+++ b/sys/kern/kern_descrip.c
@@ -349,7 +349,7 @@ fcntl(td, uap)
 
 	case F_SETLKW:
 		flg |= F_WAIT;
-		/* Fall into F_SETLK */
+		/* FALLTHROUGH F_SETLK */
 
 	case F_SETLK:
 		if (fp->f_type != DTYPE_VNODE) {
diff --git a/sys/kern/kern_lock.c b/sys/kern/kern_lock.c
index 5189bb7..5705f83 100644
--- a/sys/kern/kern_lock.c
+++ b/sys/kern/kern_lock.c
@@ -272,7 +272,7 @@ debuglockmgr(lkp, flags, interlkp, td, name, file, line)
 		 * An alternative would be to fail with EDEADLK.
 		 */
 		sharelock(lkp, 1);
-		/* fall into downgrade */
+		/* FALLTHROUGH downgrade */
 
 	case LK_DOWNGRADE:
 		KASSERT(lkp->lk_lockholder == pid && lkp->lk_exclusivecount != 0,
@@ -298,7 +298,7 @@ debuglockmgr(lkp, flags, interlkp, td, name, file, line)
 			error = EBUSY;
 			break;
 		}
-		/* fall into normal upgrade */
+		/* FALLTHROUGH normal upgrade */
 
 	case LK_UPGRADE:
 		/*
@@ -353,7 +353,7 @@ debuglockmgr(lkp, flags, interlkp, td, name, file, line)
 		if ( (lkp->lk_flags & (LK_SHARE_NONZERO|LK_WAIT_NONZERO)) ==
 			LK_WAIT_NONZERO)
 			wakeup((void *)lkp);
-		/* fall into exclusive request */
+		/* FALLTHROUGH exclusive request */
 
 	case LK_EXCLUSIVE:
 		if (lkp->lk_lockholder == pid && pid != LK_KERNPROC) {
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c
index 54b2423..0ed7c08 100644
--- a/sys/kern/sys_process.c
+++ b/sys/kern/sys_process.c
@@ -584,7 +584,7 @@ ptrace(struct thread *td, struct ptrace_args *uap)
 	case PT_WRITE_I:
 	case PT_WRITE_D:
 		write = 1;
-		/* fallthrough */
+		/* FALLTHROUGH */
 	case PT_READ_I:
 	case PT_READ_D:
 		PROC_UNLOCK(p);
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
index e0d623c..7a7317a 100644
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -1740,12 +1740,12 @@ restart:
 				nqindex = QUEUE_EMPTYKVA;
 				if ((nbp = TAILQ_FIRST(&bufqueues[QUEUE_EMPTYKVA])))
 					break;
-				/* fall through */
+				/* FALLTHROUGH */
 			case QUEUE_EMPTYKVA:
 				nqindex = QUEUE_CLEAN;
 				if ((nbp = TAILQ_FIRST(&bufqueues[QUEUE_CLEAN])))
 					break;
-				/* fall through */
+				/* FALLTHROUGH */
 			case QUEUE_CLEAN:
 				/*
 				 * nbp is NULL. 
diff --git a/sys/kern/vfs_cluster.c b/sys/kern/vfs_cluster.c
index 70d2e4e..5c5f0f0 100644
--- a/sys/kern/vfs_cluster.c
+++ b/sys/kern/vfs_cluster.c
@@ -597,12 +597,12 @@ cluster_wbuild_wb(struct vnode *vp, long size, daddr_t start_lbn, int len)
 		if (start_lbn < len)
 			break;
 		start_lbn -= len;
-		/* fall through */
+		/* FALLTHROUGH */
 	case 1:
 		r = cluster_wbuild(vp, size, start_lbn, len);
-		/* fall through */
+		/* FALLTHROUGH */
 	default:
-		/* fall through */
+		/* FALLTHROUGH */
 		break;
 	}
 	return(r);
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index d74c12c..300f051 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -1761,7 +1761,7 @@ reassignbuf(bp, newvp)
 					delay = metadelay;
 					break;
 				}
-				/* fall through */
+				/* FALLTHROUGH */
 			default:
 				delay = filedelay;
 			}
diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
index 0c106be..8288b85 100644
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -757,7 +757,7 @@ vn_ioctl(fp, com, data, active_cred, td)
 		}
 		if (com == FIONBIO || com == FIOASYNC)	/* XXX */
 			return (0);			/* XXX */
-		/* fall into ... */
+		/* FALLTHROUGH */
 
 	default:
 #if 0
diff --git a/sys/net/if_spppsubr.c b/sys/net/if_spppsubr.c
index ec52eaa..5a9184b 100644
--- a/sys/net/if_spppsubr.c
+++ b/sys/net/if_spppsubr.c
@@ -1165,7 +1165,7 @@ sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
 	case SIOCSIFADDR:
 		/* set the interface "up" when assigning an IP address */
 		ifp->if_flags |= IFF_UP;
-		/* fall through... */
+		/* FALLTHROUGH */
 
 	case SIOCSIFFLAGS:
 		going_up = ifp->if_flags & IFF_UP &&
@@ -1496,7 +1496,7 @@ sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
 		case STATE_OPENED:
 			(cp->tld)(sp);
 			(cp->scr)(sp);
-			/* fall through... */
+			/* FALLTHROUGH */
 		case STATE_ACK_SENT:
 		case STATE_REQ_SENT:
 			/*
@@ -1560,7 +1560,7 @@ sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
 			break;
 		case STATE_OPENED:
 			(cp->tld)(sp);
-			/* fall through */
+			/* FALLTHROUGH */
 		case STATE_ACK_RCVD:
 			(cp->scr)(sp);
 			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
@@ -1615,7 +1615,7 @@ sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
 			break;
 		case STATE_OPENED:
 			(cp->tld)(sp);
-			/* fall through */
+			/* FALLTHROUGH */
 		case STATE_ACK_RCVD:
 			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
 			(cp->scr)(sp);
@@ -1637,7 +1637,7 @@ sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
 		case STATE_ACK_RCVD:
 		case STATE_ACK_SENT:
 			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
-			/* fall through */
+			/* FALLTHROUGH */
 		case STATE_CLOSED:
 		case STATE_STOPPED:
 		case STATE_CLOSING:
@@ -2002,7 +2002,7 @@ sppp_close_event(const struct cp *cp, struct sppp *sp)
 		break;
 	case STATE_OPENED:
 		(cp->tld)(sp);
-		/* fall through */
+		/* FALLTHROUGH */
 	case STATE_REQ_SENT:
 	case STATE_ACK_RCVD:
 	case STATE_ACK_SENT:
@@ -4158,7 +4158,7 @@ sppp_chap_TO(void *cookie)
 		case STATE_OPENED:
 			/* TO* event */
 			sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
-			/* fall through */
+			/* FALLTHROUGH */
 		case STATE_REQ_SENT:
 			chap.scr(sp);
 			/* sppp_cp_change_state() will restart the timer */
diff --git a/sys/net/rtsock.c b/sys/net/rtsock.c
index 98a042c..37d351b 100644
--- a/sys/net/rtsock.c
+++ b/sys/net/rtsock.c
@@ -443,9 +443,7 @@ route_output(m, so)
 			       rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
 			if (genmask)
 				rt->rt_genmask = genmask;
-			/*
-			 * Fall into
-			 */
+			/* FALLTHROUGH */
 		case RTM_LOCK:
 			rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
 			rt->rt_rmx.rmx_locks |=
diff --git a/sys/net/slcompress.c b/sys/net/slcompress.c
index d72d02d..f1d2557 100644
--- a/sys/net/slcompress.c
+++ b/sys/net/slcompress.c
@@ -333,7 +333,7 @@ sl_compress_tcp(m, ip, comp, compress_cid)
 		    ntohs(cs->cs_ip.ip_len) == hlen)
 			break;
 
-		/* (fall through) */
+		/* FALLTHROUGH */
 
 	case SPECIAL_I:
 	case SPECIAL_D:
diff --git a/sys/netatm/atm_cm.c b/sys/netatm/atm_cm.c
index d684637..f17ae2a 100644
--- a/sys/netatm/atm_cm.c
+++ b/sys/netatm/atm_cm.c
@@ -2956,7 +2956,7 @@ atm_cm_cpcs_upper(cmd, tok, arg1, arg2)
 	case CPCS_UABORT_SIG:
 	case CPCS_PABORT_SIG:
 		/*
-		 * We don't support these (yet), so just fall thru...
+		 * We don't support these (yet), so just FALLTHROUGH
 		 */
 
 	default:
diff --git a/sys/netinet/ip_mroute.c b/sys/netinet/ip_mroute.c
index 668038e..8da8339 100644
--- a/sys/netinet/ip_mroute.c
+++ b/sys/netinet/ip_mroute.c
@@ -331,7 +331,7 @@ static int pim_assert;
 	       switch (xxs) { \
 		      case 2: \
 			  delta += 1000000; \
-			      /* fall through */ \
+			      /* FALLTHROUGH */ \
 		      case 1: \
 			  delta += 1000000; \
 			  break; \
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
index 07c2340..d8e77b6 100644
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -1629,7 +1629,7 @@ trimthenstep6:
 			(void) tcp_reass(tp, (struct tcphdr *)0, 0,
 			    (struct mbuf *)0);
 		tp->snd_wl1 = th->th_seq - 1;
-		/* fall into ... */
+		/* FALLTHROUGH */
 
 	/*
 	 * In ESTABLISHED state: drop duplicate ACKs; ACK out of range
diff --git a/sys/netinet/tcp_reass.c b/sys/netinet/tcp_reass.c
index 07c2340..d8e77b6 100644
--- a/sys/netinet/tcp_reass.c
+++ b/sys/netinet/tcp_reass.c
@@ -1629,7 +1629,7 @@ trimthenstep6:
 			(void) tcp_reass(tp, (struct tcphdr *)0, 0,
 			    (struct mbuf *)0);
 		tp->snd_wl1 = th->th_seq - 1;
-		/* fall into ... */
+		/* FALLTHROUGH */
 
 	/*
 	 * In ESTABLISHED state: drop duplicate ACKs; ACK out of range
diff --git a/sys/netipx/ipx_ip.c b/sys/netipx/ipx_ip.c
index 4dea458..0fb03f9 100644
--- a/sys/netipx/ipx_ip.c
+++ b/sys/netipx/ipx_ip.c
@@ -137,7 +137,7 @@ ipxipioctl(ifp, cmd, data)
 
 	case SIOCSIFADDR:
 		ifp->if_flags |= IFF_UP;
-		/* fall into: */
+		/* FALLTHROUGH */
 
 	case SIOCSIFDSTADDR:
 		/*
diff --git a/sys/netns/ns_ip.c b/sys/netns/ns_ip.c
index 45e9b8e..55d1a9f 100644
--- a/sys/netns/ns_ip.c
+++ b/sys/netns/ns_ip.c
@@ -131,7 +131,7 @@ nsipioctl(ifp, cmd, data)
 
 	case SIOCSIFADDR:
 		ifp->if_flags |= IFF_UP;
-		/* fall into: */
+		/* FALLTHROUGH */
 
 	case SIOCSIFDSTADDR:
 		/*
diff --git a/sys/netns/spp_usrreq.c b/sys/netns/spp_usrreq.c
index a28a272..6efe381 100644
--- a/sys/netns/spp_usrreq.c
+++ b/sys/netns/spp_usrreq.c
@@ -1458,7 +1458,7 @@ spp_usrreq(so, req, m, nam, controlp)
 			break;
 		}
 		cb->s_oobflags |= SF_SOOB;
-		/* fall into */
+		/* FALLTHROUGH */
 	case PRU_SEND:
 		if (controlp) {
 			u_short *p = mtod(controlp, u_short *);
diff --git a/sys/pc98/cbus/gdc.c b/sys/pc98/cbus/gdc.c
index e55d50d..b3a5b42 100644
--- a/sys/pc98/cbus/gdc.c
+++ b/sys/pc98/cbus/gdc.c
@@ -1306,7 +1306,7 @@ gdc_blank_display(video_adapter_t *adp, int mode)
 	outb(0x09a2, 0x80 | 0x40);		/* V/H-SYNC mask */
 	if (inb(0x09a2) == (0x80 | 0x40))
 	    standby = 1;
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 
     case V_DISPLAY_BLANK:
 	if (epson_machine_id == 0x20) {
diff --git a/sys/pc98/cbus/pckbd.c b/sys/pc98/cbus/pckbd.c
index 0237da3..60e01a4 100644
--- a/sys/pc98/cbus/pckbd.c
+++ b/sys/pc98/cbus/pckbd.c
@@ -722,7 +722,7 @@ pckbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 				state->ks_state &= ~LOCK_MASK;
 				state->ks_state |= KBD_LED_VAL(kbd);
 			}
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 		case K_RAW:
 		case K_CODE:
 			if (state->ks_mode != *(int *)arg) {
@@ -779,7 +779,7 @@ pckbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
 		state->ks_accents = 0;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	default:
 		splx(s);
 		return genkbd_commonioctl(kbd, cmd, arg);
diff --git a/sys/pc98/pc98/pc98gdc.c b/sys/pc98/pc98/pc98gdc.c
index e55d50d..b3a5b42 100644
--- a/sys/pc98/pc98/pc98gdc.c
+++ b/sys/pc98/pc98/pc98gdc.c
@@ -1306,7 +1306,7 @@ gdc_blank_display(video_adapter_t *adp, int mode)
 	outb(0x09a2, 0x80 | 0x40);		/* V/H-SYNC mask */
 	if (inb(0x09a2) == (0x80 | 0x40))
 	    standby = 1;
-	/* FALL THROUGH */
+	/* FALLTHROUGH */
 
     case V_DISPLAY_BLANK:
 	if (epson_machine_id == 0x20) {
diff --git a/sys/pc98/pc98/pc98kbd.c b/sys/pc98/pc98/pc98kbd.c
index 0237da3..60e01a4 100644
--- a/sys/pc98/pc98/pc98kbd.c
+++ b/sys/pc98/pc98/pc98kbd.c
@@ -722,7 +722,7 @@ pckbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 				state->ks_state &= ~LOCK_MASK;
 				state->ks_state |= KBD_LED_VAL(kbd);
 			}
-			/* FALL THROUGH */
+			/* FALLTHROUGH */
 		case K_RAW:
 		case K_CODE:
 			if (state->ks_mode != *(int *)arg) {
@@ -779,7 +779,7 @@ pckbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
 		state->ks_accents = 0;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	default:
 		splx(s);
 		return genkbd_commonioctl(kbd, cmd, arg);
diff --git a/sys/pci/if_de.c b/sys/pci/if_de.c
index a48d93c..dc10916 100644
--- a/sys/pci/if_de.c
+++ b/sys/pci/if_de.c
@@ -1336,7 +1336,7 @@ tulip_mii_autonegotiate(
 	    sc->tulip_probe_timeout = 3000;
 	    sc->tulip_intrmask |= TULIP_STS_ABNRMLINTR|TULIP_STS_NORMALINTR;
 	    sc->tulip_probe_state = TULIP_PROBE_PHYRESET;
-	    /* FALL THROUGH */
+	    /* FALLTHROUGH */
 	}
         case TULIP_PROBE_PHYRESET: {
 	    u_int32_t status;
@@ -1378,7 +1378,7 @@ tulip_mii_autonegotiate(
 #endif
 	    sc->tulip_probe_state = TULIP_PROBE_PHYAUTONEG;
 	    sc->tulip_probe_timeout = 3000;
-	    /* FALL THROUGH */
+	    /* FALLTHROUGH */
 	}
         case TULIP_PROBE_PHYAUTONEG: {
 	    u_int32_t status = tulip_mii_readreg(sc, phyaddr, PHYREG_STATUS);
diff --git a/sys/pci/ncr.c b/sys/pci/ncr.c
index 8d6fb90..49154fe 100644
--- a/sys/pci/ncr.c
+++ b/sys/pci/ncr.c
@@ -3128,7 +3128,7 @@ static void ncr_script_copy_and_bind (ncb_p np, ncrcmd *src, ncrcmd *dst, int le
 						new = old;
 						break;
 					}
-					/* fall through */
+					/* FALLTHROUGH */
 				default:
 					panic("ncr_script_copy_and_bind: weird relocation %x @ %d\n", old, (int)(src - start));
 					break;
@@ -4611,14 +4611,14 @@ ncr_wakeup (ncb_p np, u_long code)
 
 		case HS_DISCONNECT:
 			if(DEBUG_FLAGS & DEBUG_TINY) printf ("D");
-			/* fall through */
+			/* FALLTHROUGH */
 
 		case HS_BUSY:
 		case HS_NEGOTIATE:
 			if (!code) break;
 			cp->host_status = code;
 
-			/* fall through */
+			/* FALLTHROUGH */
 
 		default:
 			ncr_complete (np, cp);
@@ -5163,7 +5163,7 @@ ncr_timeout (void *arg)
 
 			case HS_BUSY:
 			case HS_NEGOTIATE:
-				/* fall through */
+				/* FALLTHROUGH */
 			case HS_DISCONNECT:
 				cp->host_status=HS_TIMEOUT;
 			};
@@ -6027,7 +6027,7 @@ void ncr_int_sir (ncb_p np)
 		*/
 		OUTB (HS_PRT, HS_BUSY);
 
-		/* fall through */
+		/* FALLTHROUGH */
 
 	case SIR_NEGO_PROTO:
 		/*-------------------------------------------------------
@@ -6353,7 +6353,7 @@ void ncr_int_sir (ncb_p np)
 		ncr_freeze_devq(np, cp->ccb->ccb_h.path);
 		ncr_complete(np, cp);
 
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 
 	case SIR_STALL_RESTART:
 		/*-----------------------------------------------
diff --git a/sys/ufs/ufs/ufs_vfsops.c b/sys/ufs/ufs/ufs_vfsops.c
index 442d823..aecfedd 100644
--- a/sys/ufs/ufs/ufs_vfsops.c
+++ b/sys/ufs/ufs/ufs_vfsops.c
@@ -122,7 +122,7 @@ ufs_quotactl(mp, cmds, uid, arg, td)
 	case Q_GETQUOTA:
 		if (uid == td->td_ucred->cr_ruid)
 			break;
-		/* fall through */
+		/* FALLTHROUGH */
 	default:
 		if ((error = suser_cred(td->td_ucred, PRISON_ROOT)) != 0)
 			return (error);
diff --git a/usr.bin/chat/chat.c b/usr.bin/chat/chat.c
index 2be228a..270249e 100644
--- a/usr.bin/chat/chat.c
+++ b/usr.bin/chat/chat.c
@@ -1221,7 +1221,7 @@ int n;
     case -1:
 	if (need_lf == 0)
 	    break;
-	/* fall through */
+	/* FALLTHROUGH */
     case '\n':
 	write(STDERR_FILENO, "\n", 1);
 	need_lf = 0;
diff --git a/usr.bin/doscmd/trap.c b/usr.bin/doscmd/trap.c
index dbf3960..02e9437 100644
--- a/usr.bin/doscmd/trap.c
+++ b/usr.bin/doscmd/trap.c
@@ -505,7 +505,7 @@ sigbus(struct sigframe *sf)
                 tty_pause();
                 goto out;
 /*            } */
-            /* FALLTHRU */
+            /* FALLTHROUGH */
 
 	default:
 	    dump_regs(REGS);
diff --git a/usr.bin/lex/initscan.c b/usr.bin/lex/initscan.c
index b81d43b..a7316ba 100644
--- a/usr.bin/lex/initscan.c
+++ b/usr.bin/lex/initscan.c
@@ -3176,7 +3176,7 @@ static int input()
 					/* Reset buffer status. */
 					yyrestart( yyin );
 
-					/* fall through */
+					/* FALLTHROUGH */
 
 				case EOB_ACT_END_OF_FILE:
 					{
diff --git a/usr.bin/mail/aux.c b/usr.bin/mail/aux.c
index 82ad0dd..fa820b4 100644
--- a/usr.bin/mail/aux.c
+++ b/usr.bin/mail/aux.c
@@ -488,7 +488,7 @@ skin(name)
 				lastsp = 0;
 				break;
 			}
-			/* Fall into . . . */
+			/* FALLTHROUGH */
 
 		default:
 			if (lastsp) {
diff --git a/usr.bin/telnet/telnet.c b/usr.bin/telnet/telnet.c
index a570a86..27aeaa9 100644
--- a/usr.bin/telnet/telnet.c
+++ b/usr.bin/telnet/telnet.c
@@ -272,7 +272,7 @@ willoption(int option)
 	    case TELOPT_BINARY:
 	    case TELOPT_SGA:
 		settimer(modenegotiated);
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	    case TELOPT_STATUS:
 		new_state_ok = 1;
 		break;
@@ -322,7 +322,7 @@ wontoption(int option)
 	    case TELOPT_SGA:
 		if (!kludgelinemode)
 		    break;
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 #endif
 	    case TELOPT_ECHO:
 		settimer(modenegotiated);
@@ -1293,7 +1293,7 @@ env_opt(unsigned char *buf, int len)
 					old_env_var = OLD_ENV_VAR;
 					old_env_value = OLD_ENV_VALUE;
 				}
-				/* FALL THROUGH */
+				/* FALLTHROUGH */
 # endif
 			case OLD_ENV_VALUE:
 				/*
@@ -1301,7 +1301,7 @@ env_opt(unsigned char *buf, int len)
 				 * still recognize it, just in case it is an
 				 * old server that has VAR & VALUE mixed up...
 				 */
-				/* FALL THROUGH */
+				/* FALLTHROUGH */
 #else
 			case NEW_ENV_VAR:
 #endif
@@ -1314,7 +1314,7 @@ env_opt(unsigned char *buf, int len)
 				break;
 			case ENV_ESC:
 				i++;
-				/*FALL THROUGH*/
+				/*FALLTHROUGH*/
 			default:
 				if (epc)
 					*epc++ = buf[i];
@@ -1519,7 +1519,7 @@ telrcv(void)
 		TTYADD(c);
 		break;
 	    }
-	    /* Else, fall through */
+	    /* FALLTHROUGH */
 
 	case TS_DATA:
 	    if (c == IAC) {
diff --git a/usr.bin/top/machine.c b/usr.bin/top/machine.c
index da60ebc..c507925f 100644
--- a/usr.bin/top/machine.c
+++ b/usr.bin/top/machine.c
@@ -544,7 +544,7 @@ char *(*get_userid)();
 		sprintf(status, "%.6s", pp->ki_wmesg);
 		break;
 	    }
-	    /* fall through */
+	    /* FALLTHROUGH */
 	default:
 
 	    if (state >= 0 &&
diff --git a/usr.bin/touch/touch.c b/usr.bin/touch/touch.c
index 7482674..26ccf0e 100644
--- a/usr.bin/touch/touch.c
+++ b/usr.bin/touch/touch.c
@@ -225,7 +225,7 @@ stime_arg1(arg, tvp)
 		t->tm_year = ATOI2(arg);
 		t->tm_year *= 100;
 		yearset = 1;
-		/* FALLTHOUGH */
+		/* FALLTHROUGH */
 	case 10:			/* YYMMDDhhmm */
 		if (yearset) {
 			yearset = ATOI2(arg);
diff --git a/usr.bin/ul/ul.c b/usr.bin/ul/ul.c
index 4426877..c4ffccf 100644
--- a/usr.bin/ul/ul.c
+++ b/usr.bin/ul/ul.c
@@ -134,7 +134,7 @@ main(argc, argv)
 
 	default:
 		warnx("trouble reading termcap");
-		/* fall through to ... */
+		/* FALLTHROUGH */
 
 	case 0:
 		/* No such terminal type - assume dumb */
diff --git a/usr.bin/yacc/reader.c b/usr.bin/yacc/reader.c
index 3e01e8f..7c1132d 100644
--- a/usr.bin/yacc/reader.c
+++ b/usr.bin/yacc/reader.c
@@ -283,7 +283,7 @@ nextc()
 		s = cptr;
 		break;
 	    }
-	    /* fall through */
+	    /* FALLTHROUGH */
 
 	default:
 	    cptr = s;
@@ -511,7 +511,7 @@ loop:
 	    FREE(t_line);
 	    return;
 	}
-	/* fall through */
+	/* FALLTHROUGH */
 
     default:
 	putc(c, f);