diff --git a/drivers/char/rio/daemon.h b/drivers/char/rio/daemon.h
index 5818a8a..6e63f8b 100644
--- a/drivers/char/rio/daemon.h
+++ b/drivers/char/rio/daemon.h
@@ -51,7 +51,7 @@
 };
 
 struct DownLoad {
-	char *DataP;
+	char __user *DataP;
 	unsigned int Count;
 	unsigned int ProductCode;
 };
@@ -83,18 +83,18 @@
 struct LpbReq {
 	unsigned int Host;
 	unsigned int Link;
-	struct LPB *LpbP;
+	struct LPB __user *LpbP;
 };
 
 struct RupReq {
 	unsigned int HostNum;
 	unsigned int RupNum;
-	struct RUP *RupP;
+	struct RUP __user *RupP;
 };
 
 struct PortReq {
 	unsigned int SysPort;
-	struct Port *PortP;
+	struct Port __user *PortP;
 };
 
 struct StreamInfo {
@@ -105,12 +105,12 @@
 
 struct HostReq {
 	unsigned int HostNum;
-	struct Host *HostP;
+	struct Host __user *HostP;
 };
 
 struct HostDpRam {
 	unsigned int HostNum;
-	struct DpRam *DpRamP;
+	struct DpRam __user *DpRamP;
 };
 
 struct DebugCtrl {
diff --git a/drivers/char/rio/func.h b/drivers/char/rio/func.h
index e64fe99..0707af3 100644
--- a/drivers/char/rio/func.h
+++ b/drivers/char/rio/func.h
@@ -46,7 +46,7 @@
 int RIOBootCodeHOST(struct rio_info *, struct DownLoad *);
 int RIOBootCodeUNKNOWN(struct rio_info *, struct DownLoad *);
 void msec_timeout(struct Host *);
-int RIOBootRup(struct rio_info *, unsigned int, struct Host *, struct PKT *);
+int RIOBootRup(struct rio_info *, unsigned int, struct Host *, struct PKT __iomem *);
 int RIOBootOk(struct rio_info *, struct Host *, unsigned long);
 int RIORtaBound(struct rio_info *, unsigned int);
 void rio_fill_host_slot(int, int, unsigned int, struct Host *);
@@ -55,8 +55,8 @@
 int RIOFoadRta(struct Host *, struct Map *);
 int RIOZombieRta(struct Host *, struct Map *);
 int RIOCommandRta(struct rio_info *, unsigned long, int (*func) (struct Host *, struct Map *));
-int RIOIdentifyRta(struct rio_info *, void *);
-int RIOKillNeighbour(struct rio_info *, void *);
+int RIOIdentifyRta(struct rio_info *, void __user *);
+int RIOKillNeighbour(struct rio_info *, void __user *);
 int RIOSuspendBootRta(struct Host *, int, int);
 int RIOFoadWakeup(struct rio_info *);
 struct CmdBlk *RIOGetCmdBlk(void);
@@ -68,7 +68,8 @@
 int RIOUnUse(unsigned long, struct CmdBlk *);
 
 /* rioctrl.c */
-int riocontrol(struct rio_info *, dev_t, int, caddr_t, int);
+int riocontrol(struct rio_info *, dev_t, int, unsigned long, int);
+
 int RIOPreemptiveCmd(struct rio_info *, struct Port *, unsigned char);
 
 /* rioinit.c */
@@ -77,13 +78,13 @@
 void RIOISAinit(struct rio_info *, int);
 int RIODoAT(struct rio_info *, int, int);
 caddr_t RIOCheckForATCard(int);
-int RIOAssignAT(struct rio_info *, int, caddr_t, int);
-int RIOBoardTest(unsigned long, caddr_t, unsigned char, int);
+int RIOAssignAT(struct rio_info *, int, void __iomem *, int);
+int RIOBoardTest(unsigned long, void __iomem *, unsigned char, int);
 void RIOAllocDataStructs(struct rio_info *);
 void RIOSetupDataStructs(struct rio_info *);
 int RIODefaultName(struct rio_info *, struct Host *, unsigned int);
 struct rioVersion *RIOVersid(void);
-void RIOHostReset(unsigned int, struct DpRam *, unsigned int);
+void RIOHostReset(unsigned int, struct DpRam __iomem *, unsigned int);
 
 /* riointr.c */
 void RIOTxEnable(char *);
@@ -95,14 +96,14 @@
 int RIODelay(struct Port *PortP, int);
 int RIODelay_ni(struct Port *PortP, int);
 void ms_timeout(struct Port *);
-int can_add_transmit(struct PKT **, struct Port *);
+int can_add_transmit(struct PKT __iomem **, struct Port *);
 void add_transmit(struct Port *);
-void put_free_end(struct Host *, struct PKT *);
-int can_remove_receive(struct PKT **, struct Port *);
+void put_free_end(struct Host *, struct PKT __iomem *);
+int can_remove_receive(struct PKT __iomem **, struct Port *);
 void remove_receive(struct Port *);
 
 /* rioroute.c */
-int RIORouteRup(struct rio_info *, unsigned int, struct Host *, struct PKT *);
+int RIORouteRup(struct rio_info *, unsigned int, struct Host *, struct PKT __iomem *);
 void RIOFixPhbs(struct rio_info *, struct Host *, unsigned int);
 unsigned int GetUnitType(unsigned int);
 int RIOSetChange(struct rio_info *);
@@ -139,7 +140,7 @@
 struct rio_info *rio_info_store(int cmd, struct rio_info *p);
 #endif
 
-extern void rio_copy_to_card(void *to, void *from, int len);
+extern void rio_copy_to_card(void __iomem *to, void *from, int len);
 extern int rio_minor(struct tty_struct *tty);
 extern int rio_ismodem(struct tty_struct *tty);
 
diff --git a/drivers/char/rio/host.h b/drivers/char/rio/host.h
index 179cdbe..ee2ddea 100644
--- a/drivers/char/rio/host.h
+++ b/drivers/char/rio/host.h
@@ -48,8 +48,8 @@
 	unsigned char Ivec;		/* POLLED or ivec number */
 	unsigned char Mode;		/* Control stuff */
 	unsigned char Slot;		/* Slot */
-	caddr_t Caddr;			/* KV address of DPRAM */
-	struct DpRam *CardP;		/* KV address of DPRAM, with overlay */
+	void  __iomem *Caddr;		/* KV address of DPRAM */
+	struct DpRam __iomem *CardP;	/* KV address of DPRAM, with overlay */
 	unsigned long PaddrP;		/* Phys. address of DPRAM */
 	char Name[MAX_NAME_LEN];	/* The name of the host */
 	unsigned int UniqueNum;		/* host unique number */
@@ -57,7 +57,7 @@
 	unsigned int WorkToBeDone;	/* set to true each interrupt */
 	unsigned int InIntr;		/* Being serviced? */
 	unsigned int IntSrvDone;	/* host's interrupt has been serviced */
-	void (*Copy) (void *, void *, int);	/* copy func */
+	void (*Copy) (void *, void __iomem *, int);	/* copy func */
 	struct timer_list timer;
 	/*
 	 **               I M P O R T A N T !
@@ -83,11 +83,11 @@
 
 	struct Top Topology[LINKS_PER_UNIT];	/* one per link */
 	struct Map Mapping[MAX_RUP];		/* Mappings for host */
-	struct PHB *PhbP;			/* Pointer to the PHB array */
-	unsigned short *PhbNumP;		/* Ptr to Number of PHB's */
-	struct LPB *LinkStrP;			/* Link Structure Array */
-	struct RUP *RupP;			/* Sixteen real rups here */
-	struct PARM_MAP *ParmMapP;		/* points to the parmmap */
+	struct PHB __iomem *PhbP;		/* Pointer to the PHB array */
+	unsigned short __iomem *PhbNumP;	/* Ptr to Number of PHB's */
+	struct LPB __iomem *LinkStrP;		/* Link Structure Array */
+	struct RUP __iomem *RupP;		/* Sixteen real rups here */
+	struct PARM_MAP __iomem *ParmMapP;	/* points to the parmmap */
 	unsigned int ExtraUnits[MAX_EXTRA_UNITS];	/* unknown things */
 	unsigned int NumExtraBooted;		/* how many of the above */
 	/*
diff --git a/drivers/char/rio/port.h b/drivers/char/rio/port.h
index 9b5fa3e..49cf6d1 100644
--- a/drivers/char/rio/port.h
+++ b/drivers/char/rio/port.h
@@ -40,7 +40,7 @@
 	struct gs_port gs;
 	int PortNum;			/* RIO port no., 0-511 */
 	struct Host *HostP;
-	caddr_t Caddr;
+	void __iomem *Caddr;
 	unsigned short HostPort;	/* Port number on host card */
 	unsigned char RupNum;		/* Number of RUP for port */
 	unsigned char ID2;		/* Second ID of RTA for port */
@@ -92,13 +92,13 @@
 #define RIO_RTSFLOW	0x0400		/* RIO's own RTSFLOW flag */
 
 
-	struct PHB *PhbP;		/* pointer to PHB for port */
-	u16 *TxAdd;			/* Add packets here */
-	u16 *TxStart;			/* Start of add array */
-	u16 *TxEnd;			/* End of add array */
-	u16 *RxRemove;			/* Remove packets here */
-	u16 *RxStart;			/* Start of remove array */
-	u16 *RxEnd;			/* End of remove array */
+	struct PHB __iomem *PhbP;	/* pointer to PHB for port */
+	u16 __iomem *TxAdd;		/* Add packets here */
+	u16 __iomem *TxStart;		/* Start of add array */
+	u16 __iomem *TxEnd;		/* End of add array */
+	u16 __iomem *RxRemove;		/* Remove packets here */
+	u16 __iomem *RxStart;		/* Start of remove array */
+	u16 __iomem *RxEnd;		/* End of remove array */
 	unsigned int RtaUniqueNum;	/* Unique number of RTA */
 	unsigned short PortState;	/* status of port */
 	unsigned short ModemState;	/* status of modem lines */
diff --git a/drivers/char/rio/rio.h b/drivers/char/rio/rio.h
index b4c9187..1bf3622 100644
--- a/drivers/char/rio/rio.h
+++ b/drivers/char/rio/rio.h
@@ -129,8 +129,8 @@
 **	RIO_OBJ takes hostp->Caddr and a UNIX pointer to an object and
 **	returns the offset into the DP RAM area.
 */
-#define	RIO_PTR(C,O) (((unsigned char *)(C))+(0xFFFF&(O)))
-#define	RIO_OFF(C,O) ((long)(O)-(long)(C))
+#define	RIO_PTR(C,O) (((unsigned char __iomem *)(C))+(0xFFFF&(O)))
+#define	RIO_OFF(C,O) ((unsigned char __iomem *)(O)-(unsigned char __iomem *)(C))
 
 /*
 **	How to convert from various different device number formats:
diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index 78dd856..39277e5 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -333,7 +333,7 @@
 	return !RIO_FAIL;
 }
 
-void rio_copy_to_card(void *to, void *from, int len)
+void rio_copy_to_card(void __iomem *to, void *from, int len)
 {
 	rio_memcpy_toio(NULL, to, from, len);
 }
@@ -573,7 +573,7 @@
 	func_enter();
 
 	/* The "dev" argument isn't used. */
-	rc = riocontrol(p, 0, cmd, (void *) arg, capable(CAP_SYS_ADMIN));
+	rc = riocontrol(p, 0, cmd, arg, capable(CAP_SYS_ADMIN));
 
 	func_exit();
 	return rc;
@@ -583,6 +583,7 @@
 
 static int rio_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, unsigned long arg)
 {
+	void __user *argp = (void __user *)arg;
 	int rc;
 	struct Port *PortP;
 	int ival;
@@ -594,14 +595,14 @@
 	rc = 0;
 	switch (cmd) {
 	case TIOCSSOFTCAR:
-		if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
+		if ((rc = get_user(ival, (unsigned __user *) argp)) == 0) {
 			tty->termios->c_cflag = (tty->termios->c_cflag & ~CLOCAL) | (ival ? CLOCAL : 0);
 		}
 		break;
 	case TIOCGSERIAL:
 		rc = -EFAULT;
-		if (access_ok(VERIFY_WRITE, (void *) arg, sizeof(struct serial_struct)))
-			rc = gs_getserial(&PortP->gs, (struct serial_struct *) arg);
+		if (access_ok(VERIFY_WRITE, argp, sizeof(struct serial_struct)))
+			rc = gs_getserial(&PortP->gs, argp);
 		break;
 	case TCSBRK:
 		if (PortP->State & RIO_DELETED) {
@@ -631,8 +632,8 @@
 		break;
 	case TIOCSSERIAL:
 		rc = -EFAULT;
-		if (access_ok(VERIFY_READ, (void *) arg, sizeof(struct serial_struct)))
-			rc = gs_setserial(&PortP->gs, (struct serial_struct *) arg);
+		if (access_ok(VERIFY_READ, argp, sizeof(struct serial_struct)))
+			rc = gs_setserial(&PortP->gs, argp);
 		break;
 	default:
 		rc = -ENOIOCTLCMD;
@@ -919,7 +920,7 @@
 static void fix_rio_pci(struct pci_dev *pdev)
 {
 	unsigned long hwbase;
-	unsigned char *rebase;
+	unsigned char __iomem *rebase;
 	unsigned int t;
 
 #define CNTRL_REG_OFFSET        0x50
@@ -999,7 +1000,7 @@
 		if (((1 << hp->Ivec) & rio_irqmask) == 0)
 			hp->Ivec = 0;
 		hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN);
-		hp->CardP = (struct DpRam *) hp->Caddr;
+		hp->CardP = (struct DpRam __iomem *) hp->Caddr;
 		hp->Type = RIO_PCI;
 		hp->Copy = rio_copy_to_card;
 		hp->Mode = RIO_PCI_BOOT_FROM_RAM;
@@ -1021,7 +1022,7 @@
 			p->RIONumHosts++;
 			found++;
 		} else {
-			iounmap((char *) (p->RIOHosts[p->RIONumHosts].Caddr));
+			iounmap(p->RIOHosts[p->RIONumHosts].Caddr);
 		}
 	}
 
@@ -1047,7 +1048,7 @@
 			hp->Ivec = 0;
 		hp->Ivec |= 0x8000;	/* Mark as non-sharable */
 		hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN);
-		hp->CardP = (struct DpRam *) hp->Caddr;
+		hp->CardP = (struct DpRam __iomem *) hp->Caddr;
 		hp->Type = RIO_PCI;
 		hp->Copy = rio_copy_to_card;
 		hp->Mode = RIO_PCI_BOOT_FROM_RAM;
@@ -1070,7 +1071,7 @@
 			p->RIONumHosts++;
 			found++;
 		} else {
-			iounmap((char *) (p->RIOHosts[p->RIONumHosts].Caddr));
+			iounmap(p->RIOHosts[p->RIONumHosts].Caddr);
 		}
 #else
 		printk(KERN_ERR "Found an older RIO PCI card, but the driver is not " "compiled to support it.\n");
@@ -1085,7 +1086,7 @@
 		/* There was something about the IRQs of these cards. 'Forget what.--REW */
 		hp->Ivec = 0;
 		hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN);
-		hp->CardP = (struct DpRam *) hp->Caddr;
+		hp->CardP = (struct DpRam __iomem *) hp->Caddr;
 		hp->Type = RIO_AT;
 		hp->Copy = rio_copy_to_card;	/* AT card PCI???? - PVDL
                                          * -- YES! this is now a normal copy. Only the
@@ -1111,7 +1112,7 @@
 			}
 
 			if (!okboard)
-				iounmap((char *) (hp->Caddr));
+				iounmap(hp->Caddr);
 		}
 	}
 
diff --git a/drivers/char/rio/rio_linux.h b/drivers/char/rio/rio_linux.h
index 4ce77fb..99c7447 100644
--- a/drivers/char/rio/rio_linux.h
+++ b/drivers/char/rio/rio_linux.h
@@ -131,24 +131,24 @@
 
 
 #ifdef CONFIG_RIO_OLDPCI
-static inline void *rio_memcpy_toio(void *dummy, void *dest, void *source, int n)
+static inline void __iomem *rio_memcpy_toio(void __iomem *dummy, void __iomem *dest, void *source, int n)
 {
-	char *dst = dest;
+	char __iomem *dst = dest;
 	char *src = source;
 
 	while (n--) {
 		writeb(*src++, dst++);
-		(void) readb(dummy);
+		(void) readb(dummy);	/* WTF? */
 	}
 
 	return dest;
 }
 
 
-static inline void *rio_memcpy_fromio(void *dest, void *source, int n)
+static inline void *rio_memcpy_fromio(void *dest, void __iomem *source, int n)
 {
 	char *dst = dest;
-	char *src = source;
+	char __iomem *src = source;
 
 	while (n--)
 		*dst++ = readb(src++);
diff --git a/drivers/char/rio/rioboot.c b/drivers/char/rio/rioboot.c
index 290143a..b9abbd0 100644
--- a/drivers/char/rio/rioboot.c
+++ b/drivers/char/rio/rioboot.c
@@ -71,7 +71,7 @@
 #include "cmdblk.h"
 #include "route.h"
 
-static int RIOBootComplete(struct rio_info *p, struct Host *HostP, unsigned int Rup, struct PktCmd *PktCmdP);
+static int RIOBootComplete(struct rio_info *p, struct Host *HostP, unsigned int Rup, struct PktCmd __iomem *PktCmdP);
 
 static const unsigned char RIOAtVec2Ctrl[] = {
 	/* 0 */ INTERRUPT_DISABLE,
@@ -204,13 +204,13 @@
 int RIOBootCodeHOST(struct rio_info *p, struct DownLoad *rbp)
 {
 	struct Host *HostP;
-	u8 *Cad;
-	PARM_MAP *ParmMapP;
+	u8 __iomem *Cad;
+	PARM_MAP __iomem *ParmMapP;
 	int RupN;
 	int PortN;
 	unsigned int host;
-	u8 *StartP;
-	u8 *DestP;
+	u8 __iomem *StartP;
+	u8 __iomem *DestP;
 	int wait_count;
 	u16 OldParmMap;
 	u16 offset;		/* It is very important that this is a u16 */
@@ -262,7 +262,7 @@
 		 ** Ensure that the host really is stopped.
 		 ** Disable it's external bus & twang its reset line.
 		 */
-		RIOHostReset(HostP->Type, (struct DpRam *) HostP->CardP, HostP->Slot);
+		RIOHostReset(HostP->Type, HostP->CardP, HostP->Slot);
 
 		/*
 		 ** Copy the data directly from user space to the SRAM.
@@ -366,7 +366,7 @@
 		 ** a short branch to 0x7FF8, where a long branch is coded.
 		 */
 
-		DestP = (u8 *) &Cad[0x7FF8];	/* <<<---- READ THE ABOVE COMMENTS */
+		DestP = &Cad[0x7FF8];	/* <<<---- READ THE ABOVE COMMENTS */
 
 #define	NFIX(N)	(0x60 | (N))	/* .O  = (~(.O + N))<<4 */
 #define	PFIX(N)	(0x20 | (N))	/* .O  =   (.O + N)<<4  */
@@ -438,7 +438,7 @@
 			rio_dprintk(RIO_DEBUG_BOOT, "RIO Mesg Run Fail\n");
 			HostP->Flags &= ~RUN_STATE;
 			HostP->Flags |= RC_STUFFED;
-			RIOHostReset( HostP->Type, (struct DpRam *)HostP->CardP, HostP->Slot );
+			RIOHostReset( HostP->Type, HostP->CardP, HostP->Slot );
 			continue;
 		}
 
@@ -453,9 +453,9 @@
 		/*
 		 ** Grab a 32 bit pointer to the parmmap structure
 		 */
-		ParmMapP = (PARM_MAP *) RIO_PTR(Cad, readw(&HostP->__ParmMapR));
+		ParmMapP = (PARM_MAP __iomem *) RIO_PTR(Cad, readw(&HostP->__ParmMapR));
 		rio_dprintk(RIO_DEBUG_BOOT, "ParmMapP : %p\n", ParmMapP);
-		ParmMapP = (PARM_MAP *) ((unsigned long) Cad + readw(&HostP->__ParmMapR));
+		ParmMapP = (PARM_MAP __iomem *)(Cad + readw(&HostP->__ParmMapR));
 		rio_dprintk(RIO_DEBUG_BOOT, "ParmMapP : %p\n", ParmMapP);
 
 		/*
@@ -468,7 +468,7 @@
 			rio_dprintk(RIO_DEBUG_BOOT, "Links = 0x%x\n", readw(&ParmMapP->links));
 			HostP->Flags &= ~RUN_STATE;
 			HostP->Flags |= RC_STUFFED;
-			RIOHostReset( HostP->Type, (struct DpRam *)HostP->CardP, HostP->Slot );
+			RIOHostReset( HostP->Type, HostP->CardP, HostP->Slot );
 			continue;
 		}
 
@@ -491,7 +491,7 @@
 			rio_dprintk(RIO_DEBUG_BOOT, "Timedout waiting for init_done\n");
 			HostP->Flags &= ~RUN_STATE;
 			HostP->Flags |= RC_STUFFED;
-			RIOHostReset( HostP->Type, (struct DpRam *)HostP->CardP, HostP->Slot );
+			RIOHostReset( HostP->Type, HostP->CardP, HostP->Slot );
 			continue;
 		}
 
@@ -512,10 +512,10 @@
 		 ** 32 bit pointers for the driver in ioremap space.
 		 */
 		HostP->ParmMapP = ParmMapP;
-		HostP->PhbP = (struct PHB *) RIO_PTR(Cad, readw(&ParmMapP->phb_ptr));
-		HostP->RupP = (struct RUP *) RIO_PTR(Cad, readw(&ParmMapP->rups));
-		HostP->PhbNumP = (unsigned short *) RIO_PTR(Cad, readw(&ParmMapP->phb_num_ptr));
-		HostP->LinkStrP = (struct LPB *) RIO_PTR(Cad, readw(&ParmMapP->link_str_ptr));
+		HostP->PhbP = (struct PHB __iomem *) RIO_PTR(Cad, readw(&ParmMapP->phb_ptr));
+		HostP->RupP = (struct RUP __iomem *) RIO_PTR(Cad, readw(&ParmMapP->rups));
+		HostP->PhbNumP = (unsigned short __iomem *) RIO_PTR(Cad, readw(&ParmMapP->phb_num_ptr));
+		HostP->LinkStrP = (struct LPB __iomem *) RIO_PTR(Cad, readw(&ParmMapP->link_str_ptr));
 
 		/*
 		 ** point the UnixRups at the real Rups
@@ -540,7 +540,7 @@
 		for (PortN = p->RIOFirstPortsMapped; PortN < p->RIOLastPortsMapped + PORTS_PER_RTA; PortN++) {
 			if (p->RIOPortp[PortN]->HostP == HostP) {
 				struct Port *PortP = p->RIOPortp[PortN];
-				struct PHB *PhbP;
+				struct PHB __iomem *PhbP;
 				/* int oldspl; */
 
 				if (!PortP->Mapped)
@@ -551,12 +551,12 @@
 
 				PortP->PhbP = PhbP;
 
-				PortP->TxAdd = (u16 *) RIO_PTR(Cad, readw(&PhbP->tx_add));
-				PortP->TxStart = (u16 *) RIO_PTR(Cad, readw(&PhbP->tx_start));
-				PortP->TxEnd = (u16 *) RIO_PTR(Cad, readw(&PhbP->tx_end));
-				PortP->RxRemove = (u16 *) RIO_PTR(Cad, readw(&PhbP->rx_remove));
-				PortP->RxStart = (u16 *) RIO_PTR(Cad, readw(&PhbP->rx_start));
-				PortP->RxEnd = (u16 *) RIO_PTR(Cad, readw(&PhbP->rx_end));
+				PortP->TxAdd = (u16 __iomem *) RIO_PTR(Cad, readw(&PhbP->tx_add));
+				PortP->TxStart = (u16 __iomem *) RIO_PTR(Cad, readw(&PhbP->tx_start));
+				PortP->TxEnd = (u16 __iomem *) RIO_PTR(Cad, readw(&PhbP->tx_end));
+				PortP->RxRemove = (u16 __iomem *) RIO_PTR(Cad, readw(&PhbP->rx_remove));
+				PortP->RxStart = (u16 __iomem *) RIO_PTR(Cad, readw(&PhbP->rx_start));
+				PortP->RxEnd = (u16 __iomem *) RIO_PTR(Cad, readw(&PhbP->rx_end));
 
 				rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 				/*
@@ -601,9 +601,9 @@
  *	return 1. If we havent, then return 0.
  */
 
-int RIOBootRup(struct rio_info *p, unsigned int Rup, struct Host *HostP, struct PKT *PacketP)
+int RIOBootRup(struct rio_info *p, unsigned int Rup, struct Host *HostP, struct PKT __iomem *PacketP)
 {
-	struct PktCmd *PktCmdP = (struct PktCmd *) PacketP->data;
+	struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *) PacketP->data;
 	struct PktCmd_M *PktReplyP;
 	struct CmdBlk *CmdBlkP;
 	unsigned int sequence;
@@ -722,7 +722,7 @@
  *	RtaUniq is the booted RTA.
  */
 
-static int RIOBootComplete(struct rio_info *p, struct Host *HostP, unsigned int Rup, struct PktCmd *PktCmdP)
+static int RIOBootComplete(struct rio_info *p, struct Host *HostP, unsigned int Rup, struct PktCmd __iomem *PktCmdP)
 {
 	struct Map *MapP = NULL;
 	struct Map *MapP2 = NULL;
diff --git a/drivers/char/rio/riocmd.c b/drivers/char/rio/riocmd.c
index e6d2b14b..595f7a9 100644
--- a/drivers/char/rio/riocmd.c
+++ b/drivers/char/rio/riocmd.c
@@ -180,7 +180,7 @@
 }
 
 
-int RIOIdentifyRta(struct rio_info *p, void * arg)
+int RIOIdentifyRta(struct rio_info *p, void __user * arg)
 {
 	unsigned int Host;
 
@@ -245,7 +245,7 @@
 }
 
 
-int RIOKillNeighbour(struct rio_info *p, void * arg)
+int RIOKillNeighbour(struct rio_info *p, void __user * arg)
 {
 	uint Host;
 	uint ID;
@@ -370,9 +370,9 @@
 /*
 ** Incoming command on the COMMAND_RUP to be processed.
 */
-static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, struct PKT * PacketP)
+static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, struct PKT __iomem *PacketP)
 {
-	struct PktCmd *PktCmdP = (struct PktCmd *) PacketP->data;
+	struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *)PacketP->data;
 	struct Port *PortP;
 	struct UnixRup *UnixRupP;
 	unsigned short SysPort;
@@ -601,7 +601,7 @@
 		/*
 		 ** Whammy! blat that pack!
 		 */
-		HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(struct PKT));
+		HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(struct PKT));
 
 		/*
 		 ** place command packet on the pending position.
@@ -655,7 +655,7 @@
 {
 	struct CmdBlk *CmdBlkP;
 	struct UnixRup *UnixRupP;
-	struct PKT *PacketP;
+	struct PKT __iomem *PacketP;
 	unsigned short Rup;
 	unsigned long flags;
 
@@ -676,7 +676,7 @@
 		if (readw(&UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) {
 			int FreeMe;
 
-			PacketP = (struct PKT *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt));
+			PacketP = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt));
 
 			switch (readb(&PacketP->dest_port)) {
 			case BOOT_RUP:
@@ -696,7 +696,7 @@
 				FreeMe = RIOCommandRup(p, Rup, HostP, PacketP);
 				if (PacketP->data[5] == MEMDUMP) {
 					rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", *(unsigned short *) & (PacketP->data[6]));
-					HostP->Copy((caddr_t) & (PacketP->data[8]), (caddr_t) p->RIOMemDump, 32);
+					HostP->Copy(&(PacketP->data[8]), p->RIOMemDump, 32);
 				}
 				rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
 				break;
@@ -782,7 +782,7 @@
 				/*
 				 ** Whammy! blat that pack!
 				 */
-				HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(struct PKT));
+				HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(struct PKT));
 
 				/*
 				 ** remove the command from the rup command queue...
@@ -824,7 +824,7 @@
 int RIORFlushEnable(unsigned long iPortP, struct CmdBlk *CmdBlkP)
 {
 	struct Port *PortP = (struct Port *) iPortP;
-	struct PKT *PacketP;
+	struct PKT __iomem *PacketP;
 	unsigned long flags;
 
 	rio_spin_lock_irqsave(&PortP->portSem, flags);
diff --git a/drivers/char/rio/rioctrl.c b/drivers/char/rio/rioctrl.c
index 75b2557..732e7db 100644
--- a/drivers/char/rio/rioctrl.c
+++ b/drivers/char/rio/rioctrl.c
@@ -80,7 +80,7 @@
 static struct LpbReq LpbReq;
 static struct RupReq RupReq;
 static struct PortReq PortReq;
-static struct HostReq HostReq;
+static struct HostReq HostReq;	/* oh really?  global?  and no locking? */
 static struct HostDpRam HostDpRam;
 static struct DebugCtrl DebugCtrl;
 static struct Map MapEnt;
@@ -126,12 +126,7 @@
 
 #define drv_makedev(maj, min) ((((uint) maj & 0xff) << 8) | ((uint) min & 0xff))
 
-int riocontrol(p, dev, cmd, arg, su)
-struct rio_info *p;
-dev_t dev;
-int cmd;
-caddr_t arg;
-int su;
+int riocontrol(struct rio_info *p, dev_t dev, int cmd, unsigned long arg, int su)
 {
 	uint Host;		/* leave me unsigned! */
 	uint port;		/* and me! */
@@ -139,9 +134,10 @@
 	ushort loop;
 	int Entry;
 	struct Port *PortP;
-	struct PKT *PacketP;
+	struct PKT __iomem *PacketP;
 	int retval = 0;
 	unsigned long flags;
+	void __user *argp = (void __user *)arg;
 
 	func_enter();
 
@@ -149,7 +145,7 @@
 	Host = 0;
 	PortP = NULL;
 
-	rio_dprintk(RIO_DEBUG_CTRL, "control ioctl cmd: 0x%x arg: %p\n", cmd, arg);
+	rio_dprintk(RIO_DEBUG_CTRL, "control ioctl cmd: 0x%x arg: %p\n", cmd, argp);
 
 	switch (cmd) {
 		/*
@@ -160,11 +156,11 @@
 		 ** otherwise just the specified host card will be changed.
 		 */
 	case RIO_SET_TIMER:
-		rio_dprintk(RIO_DEBUG_CTRL, "RIO_SET_TIMER to %ldms\n", (unsigned long)arg);
+		rio_dprintk(RIO_DEBUG_CTRL, "RIO_SET_TIMER to %ldms\n", arg);
 		{
 			int host, value;
-			host = ((unsigned long) arg >> 16) & 0x0000FFFF;
-			value = (unsigned long) arg & 0x0000ffff;
+			host = (arg >> 16) & 0x0000FFFF;
+			value = arg & 0x0000ffff;
 			if (host == -1) {
 				for (host = 0; host < p->RIONumHosts; host++) {
 					if (p->RIOHosts[host].Flags == RC_RUNNING) {
@@ -183,26 +179,26 @@
 
 	case RIO_FOAD_RTA:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_FOAD_RTA\n");
-		return RIOCommandRta(p, (unsigned long)arg, RIOFoadRta);
+		return RIOCommandRta(p, arg, RIOFoadRta);
 
 	case RIO_ZOMBIE_RTA:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_ZOMBIE_RTA\n");
-		return RIOCommandRta(p, (unsigned long)arg, RIOZombieRta);
+		return RIOCommandRta(p, arg, RIOZombieRta);
 
 	case RIO_IDENTIFY_RTA:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_IDENTIFY_RTA\n");
-		return RIOIdentifyRta(p, arg);
+		return RIOIdentifyRta(p, argp);
 
 	case RIO_KILL_NEIGHBOUR:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_KILL_NEIGHBOUR\n");
-		return RIOKillNeighbour(p, arg);
+		return RIOKillNeighbour(p, argp);
 
 	case SPECIAL_RUP_CMD:
 		{
 			struct CmdBlk *CmdBlkP;
 
 			rio_dprintk(RIO_DEBUG_CTRL, "SPECIAL_RUP_CMD\n");
-			if (copy_from_user(&SpecialRupCmd, arg, sizeof(SpecialRupCmd))) {
+			if (copy_from_user(&SpecialRupCmd, argp, sizeof(SpecialRupCmd))) {
 				rio_dprintk(RIO_DEBUG_CTRL, "SPECIAL_RUP_CMD copy failed\n");
 				p->RIOError.Error = COPYIN_FAILED;
 				return -EFAULT;
@@ -239,7 +235,7 @@
 		if ((retval = RIOApel(p)) != 0)
 			return retval;
 
-		if (copy_to_user(arg, p->RIOConnectTable, TOTAL_MAP_ENTRIES * sizeof(struct Map))) {
+		if (copy_to_user(argp, p->RIOConnectTable, TOTAL_MAP_ENTRIES * sizeof(struct Map))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_GET_TABLE copy failed\n");
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
@@ -284,7 +280,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_from_user(&p->RIOConnectTable[0], arg, TOTAL_MAP_ENTRIES * sizeof(struct Map))) {
+		if (copy_from_user(&p->RIOConnectTable[0], argp, TOTAL_MAP_ENTRIES * sizeof(struct Map))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_PUT_TABLE copy failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -330,7 +326,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_to_user(arg, p->RIOBindTab, (sizeof(ulong) * MAX_RTA_BINDINGS))) {
+		if (copy_to_user(argp, p->RIOBindTab, (sizeof(ulong) * MAX_RTA_BINDINGS))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_GET_BINDINGS copy failed\n");
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
@@ -349,7 +345,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_from_user(&p->RIOBindTab[0], arg, (sizeof(ulong) * MAX_RTA_BINDINGS))) {
+		if (copy_from_user(&p->RIOBindTab[0], argp, (sizeof(ulong) * MAX_RTA_BINDINGS))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_PUT_BINDINGS copy failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -373,12 +369,12 @@
 			for (Entry = 0; Entry < MAX_RTA_BINDINGS; Entry++) {
 				if ((EmptySlot == -1) && (p->RIOBindTab[Entry] == 0L))
 					EmptySlot = Entry;
-				else if (p->RIOBindTab[Entry] == (long)arg) {
+				else if (p->RIOBindTab[Entry] == arg) {
 					/*
 					 ** Already exists - delete
 					 */
 					p->RIOBindTab[Entry] = 0L;
-					rio_dprintk(RIO_DEBUG_CTRL, "Removing Rta %ld from p->RIOBindTab\n", (unsigned long)arg);
+					rio_dprintk(RIO_DEBUG_CTRL, "Removing Rta %ld from p->RIOBindTab\n", arg);
 					return 0;
 				}
 			}
@@ -386,10 +382,10 @@
 			 ** Dosen't exist - add
 			 */
 			if (EmptySlot != -1) {
-				p->RIOBindTab[EmptySlot] = (unsigned long)arg;
-				rio_dprintk(RIO_DEBUG_CTRL, "Adding Rta %lx to p->RIOBindTab\n", (unsigned long) arg);
+				p->RIOBindTab[EmptySlot] = arg;
+				rio_dprintk(RIO_DEBUG_CTRL, "Adding Rta %lx to p->RIOBindTab\n", arg);
 			} else {
-				rio_dprintk(RIO_DEBUG_CTRL, "p->RIOBindTab full! - Rta %lx not added\n", (unsigned long) arg);
+				rio_dprintk(RIO_DEBUG_CTRL, "p->RIOBindTab full! - Rta %lx not added\n", arg);
 				return -ENOMEM;
 			}
 			return 0;
@@ -397,7 +393,7 @@
 
 	case RIO_RESUME:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_RESUME\n");
-		port = (unsigned long) arg;
+		port = arg;
 		if ((port < 0) || (port > 511)) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_RESUME: Bad port number %d\n", port);
 			p->RIOError.Error = PORT_NUMBER_OUT_OF_RANGE;
@@ -433,7 +429,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_from_user(&MapEnt, arg, sizeof(MapEnt))) {
+		if (copy_from_user(&MapEnt, argp, sizeof(MapEnt))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "Copy from user space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -447,7 +443,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_from_user(&MapEnt, arg, sizeof(MapEnt))) {
+		if (copy_from_user(&MapEnt, argp, sizeof(MapEnt))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "Copy from user space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -461,7 +457,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_from_user(&MapEnt, arg, sizeof(MapEnt))) {
+		if (copy_from_user(&MapEnt, argp, sizeof(MapEnt))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "Copy from data space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -469,14 +465,14 @@
 		return RIODeleteRta(p, &MapEnt);
 
 	case RIO_QUICK_CHECK:
-		if (copy_to_user(arg, &p->RIORtaDisCons, sizeof(unsigned int))) {
+		if (copy_to_user(argp, &p->RIORtaDisCons, sizeof(unsigned int))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
 		return 0;
 
 	case RIO_LAST_ERROR:
-		if (copy_to_user(arg, &p->RIOError, sizeof(struct Error)))
+		if (copy_to_user(argp, &p->RIOError, sizeof(struct Error)))
 			return -EFAULT;
 		return 0;
 
@@ -485,7 +481,7 @@
 		return -EINVAL;
 
 	case RIO_GET_MODTYPE:
-		if (copy_from_user(&port, arg, sizeof(unsigned int))) {
+		if (copy_from_user(&port, argp, sizeof(unsigned int))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -505,7 +501,7 @@
 		 ** Return module type of port
 		 */
 		port = PortP->HostP->UnixRups[PortP->RupNum].ModTypes;
-		if (copy_to_user(arg, &port, sizeof(unsigned int))) {
+		if (copy_to_user(argp, &port, sizeof(unsigned int))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
@@ -521,7 +517,7 @@
 
 	case RIO_SETUP_PORTS:
 		rio_dprintk(RIO_DEBUG_CTRL, "Setup ports\n");
-		if (copy_from_user(&PortSetup, arg, sizeof(PortSetup))) {
+		if (copy_from_user(&PortSetup, argp, sizeof(PortSetup))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			rio_dprintk(RIO_DEBUG_CTRL, "EFAULT");
 			return -EFAULT;
@@ -551,7 +547,7 @@
 
 	case RIO_GET_PORT_SETUP:
 		rio_dprintk(RIO_DEBUG_CTRL, "Get port setup\n");
-		if (copy_from_user(&PortSetup, arg, sizeof(PortSetup))) {
+		if (copy_from_user(&PortSetup, argp, sizeof(PortSetup))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -572,7 +568,7 @@
 		PortSetup.XpOn[MAX_XP_CTRL_LEN - 1] = '\0';
 		PortSetup.XpOff[MAX_XP_CTRL_LEN - 1] = '\0';
 
-		if (copy_to_user(arg, &PortSetup, sizeof(PortSetup))) {
+		if (copy_to_user(argp, &PortSetup, sizeof(PortSetup))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
@@ -580,7 +576,7 @@
 
 	case RIO_GET_PORT_PARAMS:
 		rio_dprintk(RIO_DEBUG_CTRL, "Get port params\n");
-		if (copy_from_user(&PortParams, arg, sizeof(struct PortParams))) {
+		if (copy_from_user(&PortParams, argp, sizeof(struct PortParams))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -593,7 +589,7 @@
 		PortParams.State = PortP->State;
 		rio_dprintk(RIO_DEBUG_CTRL, "Port %d\n", PortParams.Port);
 
-		if (copy_to_user(arg, &PortParams, sizeof(struct PortParams))) {
+		if (copy_to_user(argp, &PortParams, sizeof(struct PortParams))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
@@ -601,7 +597,7 @@
 
 	case RIO_GET_PORT_TTY:
 		rio_dprintk(RIO_DEBUG_CTRL, "Get port tty\n");
-		if (copy_from_user(&PortTty, arg, sizeof(struct PortTty))) {
+		if (copy_from_user(&PortTty, argp, sizeof(struct PortTty))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -612,14 +608,14 @@
 
 		rio_dprintk(RIO_DEBUG_CTRL, "Port %d\n", PortTty.port);
 		PortP = (p->RIOPortp[PortTty.port]);
-		if (copy_to_user(arg, &PortTty, sizeof(struct PortTty))) {
+		if (copy_to_user(argp, &PortTty, sizeof(struct PortTty))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
 		return retval;
 
 	case RIO_SET_PORT_TTY:
-		if (copy_from_user(&PortTty, arg, sizeof(struct PortTty))) {
+		if (copy_from_user(&PortTty, argp, sizeof(struct PortTty))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -634,7 +630,7 @@
 
 	case RIO_SET_PORT_PARAMS:
 		rio_dprintk(RIO_DEBUG_CTRL, "Set port params\n");
-		if (copy_from_user(&PortParams, arg, sizeof(PortParams))) {
+		if (copy_from_user(&PortParams, argp, sizeof(PortParams))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -650,7 +646,7 @@
 
 	case RIO_GET_PORT_STATS:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_GET_PORT_STATS\n");
-		if (copy_from_user(&portStats, arg, sizeof(struct portStats))) {
+		if (copy_from_user(&portStats, argp, sizeof(struct portStats))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -665,14 +661,14 @@
 		portStats.opens = PortP->opens;
 		portStats.closes = PortP->closes;
 		portStats.ioctls = PortP->ioctls;
-		if (copy_to_user(arg, &portStats, sizeof(struct portStats))) {
+		if (copy_to_user(argp, &portStats, sizeof(struct portStats))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
 		return retval;
 
 	case RIO_RESET_PORT_STATS:
-		port = (unsigned long) arg;
+		port = arg;
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_RESET_PORT_STATS\n");
 		if (port >= RIO_PORTS) {
 			p->RIOError.Error = PORT_NUMBER_OUT_OF_RANGE;
@@ -690,7 +686,7 @@
 
 	case RIO_GATHER_PORT_STATS:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_GATHER_PORT_STATS\n");
-		if (copy_from_user(&portStats, arg, sizeof(struct portStats))) {
+		if (copy_from_user(&portStats, argp, sizeof(struct portStats))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -706,7 +702,7 @@
 
 	case RIO_READ_CONFIG:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_READ_CONFIG\n");
-		if (copy_to_user(arg, &p->RIOConf, sizeof(struct Conf))) {
+		if (copy_to_user(argp, &p->RIOConf, sizeof(struct Conf))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
@@ -718,7 +714,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_from_user(&p->RIOConf, arg, sizeof(struct Conf))) {
+		if (copy_from_user(&p->RIOConf, argp, sizeof(struct Conf))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -746,7 +742,7 @@
 	case RIO_SETDEBUG:
 	case RIO_GETDEBUG:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_SETDEBUG/RIO_GETDEBUG\n");
-		if (copy_from_user(&DebugCtrl, arg, sizeof(DebugCtrl))) {
+		if (copy_from_user(&DebugCtrl, argp, sizeof(DebugCtrl))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -763,7 +759,7 @@
 				rio_dprintk(RIO_DEBUG_CTRL, "Get global debug 0x%x wait 0x%x\n", p->rio_debug, p->RIODebugWait);
 				DebugCtrl.Debug = p->rio_debug;
 				DebugCtrl.Wait = p->RIODebugWait;
-				if (copy_to_user(arg, &DebugCtrl, sizeof(DebugCtrl))) {
+				if (copy_to_user(argp, &DebugCtrl, sizeof(DebugCtrl))) {
 					rio_dprintk(RIO_DEBUG_CTRL, "RIO_SET/GET DEBUG: bad port number %d\n", DebugCtrl.SysPort);
 					p->RIOError.Error = COPYOUT_FAILED;
 					return -EFAULT;
@@ -785,7 +781,7 @@
 		} else {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_GETDEBUG 0x%x\n", p->RIOPortp[DebugCtrl.SysPort]->Debug);
 			DebugCtrl.Debug = p->RIOPortp[DebugCtrl.SysPort]->Debug;
-			if (copy_to_user(arg, &DebugCtrl, sizeof(DebugCtrl))) {
+			if (copy_to_user(argp, &DebugCtrl, sizeof(DebugCtrl))) {
 				rio_dprintk(RIO_DEBUG_CTRL, "RIO_GETDEBUG: Bad copy to user space\n");
 				p->RIOError.Error = COPYOUT_FAILED;
 				return -EFAULT;
@@ -800,7 +796,7 @@
 		 ** textual null terminated string.
 		 */
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_VERSID\n");
-		if (copy_to_user(arg, RIOVersid(), sizeof(struct rioVersion))) {
+		if (copy_to_user(argp, RIOVersid(), sizeof(struct rioVersion))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_VERSID: Bad copy to user space (host=%d)\n", Host);
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
@@ -813,7 +809,7 @@
 		 ** at init time.
 		 */
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_NUM_HOSTS\n");
-		if (copy_to_user(arg, &p->RIONumHosts, sizeof(p->RIONumHosts))) {
+		if (copy_to_user(argp, &p->RIONumHosts, sizeof(p->RIONumHosts))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_NUM_HOSTS: Bad copy to user space\n");
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
@@ -824,7 +820,7 @@
 		/*
 		 ** Kill host. This may not be in the final version...
 		 */
-		rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_FOAD %ld\n", (unsigned long) arg);
+		rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_FOAD %ld\n", arg);
 		if (!su) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_FOAD: Not super user\n");
 			p->RIOError.Error = NOT_SUPER_USER;
@@ -858,7 +854,7 @@
 			p->RIOError.Error = NOT_SUPER_USER;
 			return -EPERM;
 		}
-		if (copy_from_user(&DownLoad, arg, sizeof(DownLoad))) {
+		if (copy_from_user(&DownLoad, argp, sizeof(DownLoad))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_DOWNLOAD: Copy in from user space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -888,7 +884,7 @@
 		{
 			unsigned int host;
 
-			if (copy_from_user(&host, arg, sizeof(host))) {
+			if (copy_from_user(&host, argp, sizeof(host))) {
 				rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_REQ: Copy in from user space failed\n");
 				p->RIOError.Error = COPYIN_FAILED;
 				return -EFAULT;
@@ -897,7 +893,7 @@
 			 ** Fetch the parmmap
 			 */
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_PARMS\n");
-			if (copy_to_user(arg, p->RIOHosts[host].ParmMapP, sizeof(PARM_MAP))) {
+			if (copy_to_user(argp, p->RIOHosts[host].ParmMapP, sizeof(PARM_MAP))) {
 				p->RIOError.Error = COPYOUT_FAILED;
 				rio_dprintk(RIO_DEBUG_CTRL, "RIO_PARMS: Copy out to user space failed\n");
 				return -EFAULT;
@@ -907,7 +903,7 @@
 
 	case RIO_HOST_REQ:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_REQ\n");
-		if (copy_from_user(&HostReq, arg, sizeof(HostReq))) {
+		if (copy_from_user(&HostReq, argp, sizeof(HostReq))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_REQ: Copy in from user space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -928,7 +924,7 @@
 
 	case RIO_HOST_DPRAM:
 		rio_dprintk(RIO_DEBUG_CTRL, "Request for DPRAM\n");
-		if (copy_from_user(&HostDpRam, arg, sizeof(HostDpRam))) {
+		if (copy_from_user(&HostDpRam, argp, sizeof(HostDpRam))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_DPRAM: Copy in from user space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -945,7 +941,7 @@
 			/* It's hardware like this that really gets on my tits. */
 			static unsigned char copy[sizeof(struct DpRam)];
 			for (off = 0; off < sizeof(struct DpRam); off++)
-				copy[off] = readb(&p->RIOHosts[HostDpRam.HostNum].Caddr[off]);
+				copy[off] = readb(p->RIOHosts[HostDpRam.HostNum].Caddr + off);
 			if (copy_to_user(HostDpRam.DpRamP, copy, sizeof(struct DpRam))) {
 				p->RIOError.Error = COPYOUT_FAILED;
 				rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_DPRAM: Bad copy to user space\n");
@@ -960,13 +956,13 @@
 
 	case RIO_SET_BUSY:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_SET_BUSY\n");
-		if ((unsigned long) arg > 511) {
-			rio_dprintk(RIO_DEBUG_CTRL, "RIO_SET_BUSY: Bad port number %ld\n", (unsigned long) arg);
+		if (arg > 511) {
+			rio_dprintk(RIO_DEBUG_CTRL, "RIO_SET_BUSY: Bad port number %ld\n", arg);
 			p->RIOError.Error = PORT_NUMBER_OUT_OF_RANGE;
 			return -EINVAL;
 		}
 		rio_spin_lock_irqsave(&PortP->portSem, flags);
-		p->RIOPortp[(unsigned long) arg]->State |= RIO_BUSY;
+		p->RIOPortp[arg]->State |= RIO_BUSY;
 		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 		return retval;
 
@@ -976,7 +972,7 @@
 		 ** (probably for debug reasons)
 		 */
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_PORT\n");
-		if (copy_from_user(&PortReq, arg, sizeof(PortReq))) {
+		if (copy_from_user(&PortReq, argp, sizeof(PortReq))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_PORT: Copy in from user space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -1001,7 +997,7 @@
 		 ** (probably for debug reasons)
 		 */
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_RUP\n");
-		if (copy_from_user(&RupReq, arg, sizeof(RupReq))) {
+		if (copy_from_user(&RupReq, argp, sizeof(RupReq))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_RUP: Copy in from user space failed\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -1038,7 +1034,7 @@
 		 ** (probably for debug reasons)
 		 */
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_LPB\n");
-		if (copy_from_user(&LpbReq, arg, sizeof(LpbReq))) {
+		if (copy_from_user(&LpbReq, argp, sizeof(LpbReq))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_HOST_LPB: Bad copy from user space\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -1136,7 +1132,7 @@
 	case RIO_MAP_B110_TO_110:
 	case RIO_MAP_B110_TO_115200:
 		rio_dprintk(RIO_DEBUG_CTRL, "Baud rate mapping\n");
-		port = (unsigned long) arg;
+		port = arg;
 		if (port < 0 || port > 511) {
 			rio_dprintk(RIO_DEBUG_CTRL, "Baud rate mapping: Bad port number %d\n", port);
 			p->RIOError.Error = PORT_NUMBER_OUT_OF_RANGE;
@@ -1166,7 +1162,7 @@
 
 	case RIO_SEND_PACKET:
 		rio_dprintk(RIO_DEBUG_CTRL, "RIO_SEND_PACKET\n");
-		if (copy_from_user(&SendPack, arg, sizeof(SendPack))) {
+		if (copy_from_user(&SendPack, argp, sizeof(SendPack))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_SEND_PACKET: Bad copy from user space\n");
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
@@ -1210,7 +1206,7 @@
 		return su ? 0 : -EPERM;
 
 	case RIO_WHAT_MESG:
-		if (copy_to_user(arg, &p->RIONoMessage, sizeof(p->RIONoMessage))) {
+		if (copy_to_user(argp, &p->RIONoMessage, sizeof(p->RIONoMessage))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_WHAT_MESG: Bad copy to user space\n");
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
@@ -1218,7 +1214,7 @@
 		return 0;
 
 	case RIO_MEM_DUMP:
-		if (copy_from_user(&SubCmd, arg, sizeof(struct SubCmdStruct))) {
+		if (copy_from_user(&SubCmd, argp, sizeof(struct SubCmdStruct))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -1248,7 +1244,7 @@
 			PortP->State |= RIO_BUSY;
 
 		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
-		if (copy_to_user(arg, p->RIOMemDump, MEMDUMP_SIZE)) {
+		if (copy_to_user(argp, p->RIOMemDump, MEMDUMP_SIZE)) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_MEM_DUMP copy failed\n");
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
@@ -1256,30 +1252,30 @@
 		return 0;
 
 	case RIO_TICK:
-		if ((unsigned long) arg >= p->RIONumHosts)
+		if (arg >= p->RIONumHosts)
 			return -EINVAL;
-		rio_dprintk(RIO_DEBUG_CTRL, "Set interrupt for host %ld\n", (unsigned long) arg);
-		writeb(0xFF, &p->RIOHosts[(unsigned long) arg].SetInt);
+		rio_dprintk(RIO_DEBUG_CTRL, "Set interrupt for host %ld\n", arg);
+		writeb(0xFF, &p->RIOHosts[arg].SetInt);
 		return 0;
 
 	case RIO_TOCK:
-		if ((unsigned long) arg >= p->RIONumHosts)
+		if (arg >= p->RIONumHosts)
 			return -EINVAL;
-		rio_dprintk(RIO_DEBUG_CTRL, "Clear interrupt for host %ld\n", (unsigned long) arg);
-		writeb(0xFF, &p->RIOHosts[(unsigned long) arg].ResetInt);
+		rio_dprintk(RIO_DEBUG_CTRL, "Clear interrupt for host %ld\n", arg);
+		writeb(0xFF, &p->RIOHosts[arg].ResetInt);
 		return 0;
 
 	case RIO_READ_CHECK:
 		/* Check reads for pkts with data[0] the same */
 		p->RIOReadCheck = !p->RIOReadCheck;
-		if (copy_to_user(arg, &p->RIOReadCheck, sizeof(unsigned int))) {
+		if (copy_to_user(argp, &p->RIOReadCheck, sizeof(unsigned int))) {
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
 		}
 		return 0;
 
 	case RIO_READ_REGISTER:
-		if (copy_from_user(&SubCmd, arg, sizeof(struct SubCmdStruct))) {
+		if (copy_from_user(&SubCmd, argp, sizeof(struct SubCmdStruct))) {
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
@@ -1314,7 +1310,7 @@
 			PortP->State |= RIO_BUSY;
 
 		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
-		if (copy_to_user(arg, &p->CdRegister, sizeof(unsigned int))) {
+		if (copy_to_user(argp, &p->CdRegister, sizeof(unsigned int))) {
 			rio_dprintk(RIO_DEBUG_CTRL, "RIO_READ_REGISTER copy failed\n");
 			p->RIOError.Error = COPYOUT_FAILED;
 			return -EFAULT;
@@ -1327,10 +1323,10 @@
 		 */
 	case RIO_MAKE_DEV:
 		{
-			unsigned int port = (unsigned long) arg & RIO_MODEM_MASK;
+			unsigned int port = arg & RIO_MODEM_MASK;
 			unsigned int ret;
 
-			switch ((unsigned long) arg & RIO_DEV_MASK) {
+			switch (arg & RIO_DEV_MASK) {
 			case RIO_DEV_DIRECT:
 				ret = drv_makedev(MAJOR(dev), port);
 				rio_dprintk(RIO_DEBUG_CTRL, "Makedev direct 0x%x is 0x%x\n", port, ret);
@@ -1358,7 +1354,7 @@
 			int mino;
 			unsigned long ret;
 
-			dv = (dev_t) ((unsigned long) arg);
+			dv = (dev_t) (arg);
 			mino = RIO_UNMODEM(dv);
 
 			if (RIO_ISMODEM(dv)) {
diff --git a/drivers/char/rio/rioinit.c b/drivers/char/rio/rioinit.c
index 24d2992..12e34bc 100644
--- a/drivers/char/rio/rioinit.c
+++ b/drivers/char/rio/rioinit.c
@@ -79,7 +79,7 @@
 
 int RIOPCIinit(struct rio_info *p, int Mode);
 
-static int RIOScrub(int, u8 *, int);
+static int RIOScrub(int, u8 __iomem *, int);
 
 
 /**
@@ -92,10 +92,10 @@
 ** bits > 0 indicates 16 bit operation.
 */
 
-int RIOAssignAT(struct rio_info *p, int	Base, caddr_t	virtAddr, int mode)
+int RIOAssignAT(struct rio_info *p, int	Base, void __iomem *virtAddr, int mode)
 {
 	int		bits;
-	struct DpRam *cardp = (struct DpRam *)virtAddr;
+	struct DpRam __iomem *cardp = (struct DpRam __iomem *)virtAddr;
 
 	if ((Base < ONE_MEG) || (mode & BYTE_ACCESS_MODE))
 		bits = BYTE_OPERATION;
@@ -107,7 +107,7 @@
 	** transient stuff.
 	*/
 	p->RIOHosts[p->RIONumHosts].Caddr	= virtAddr;
-	p->RIOHosts[p->RIONumHosts].CardP	= (struct DpRam *)virtAddr;
+	p->RIOHosts[p->RIONumHosts].CardP	= virtAddr;
 
 	/*
 	** Revision 01 AT host cards don't support WORD operations,
@@ -151,10 +151,10 @@
 ** RAM test a board. 
 ** Nothing too complicated, just enough to check it out.
 */
-int RIOBoardTest(unsigned long paddr, caddr_t	caddr, unsigned char type, int slot)
+int RIOBoardTest(unsigned long paddr, void __iomem *caddr, unsigned char type, int slot)
 {
-	struct DpRam *DpRam = (struct DpRam *)caddr;
-	char *ram[4];
+	struct DpRam __iomem *DpRam = caddr;
+	void __iomem *ram[4];
 	int  size[4];
 	int  op, bank;
 	int  nbanks;
@@ -179,12 +179,12 @@
 	size[2] = DP_SRAM3_SIZE;
 	size[3] = DP_SCRATCH_SIZE;
 
-	ram[0] = (char *)&DpRam->DpSram1[0];
-	ram[1] = (char *)&DpRam->DpSram2[0];
-	ram[2] = (char *)&DpRam->DpSram3[0];
+	ram[0] = DpRam->DpSram1;
+	ram[1] = DpRam->DpSram2;
+	ram[2] = DpRam->DpSram3;
 	nbanks = (type == RIO_PCI) ? 3 : 4;
 	if (nbanks == 4)
-		ram[3] = (char *)&DpRam->DpScratch[0];
+		ram[3] = DpRam->DpScratch;
 
 
 	if (nbanks == 3) {
@@ -202,7 +202,7 @@
 	*/
 	for (op=0; op<TEST_END; op++) {
 		for (bank=0; bank<nbanks; bank++) {
-			if (RIOScrub(op, (u8 *)ram[bank], size[bank]) == RIO_FAIL) {
+			if (RIOScrub(op, ram[bank], size[bank]) == RIO_FAIL) {
 				rio_dprintk (RIO_DEBUG_INIT, "RIO-init: RIOScrub band %d, op %d failed\n", 
 							bank, op);
 				return RIO_FAIL;
@@ -227,7 +227,7 @@
 ** to check that the data from the previous phase was retained.
 */
 
-static int RIOScrub(int op, u8 *ram, int size)
+static int RIOScrub(int op, u8 __iomem *ram, int size)
 {
 	int off;
 	unsigned char	oldbyte;
@@ -393,7 +393,7 @@
     return &stVersion;
 }
 
-void RIOHostReset(unsigned int Type, struct DpRam *DpRamP, unsigned int Slot)
+void RIOHostReset(unsigned int Type, struct DpRam __iomem *DpRamP, unsigned int Slot)
 {
 	/*
 	** Reset the Tpu
diff --git a/drivers/char/rio/riointr.c b/drivers/char/rio/riointr.c
index 97f0fa5..c05e84c 100644
--- a/drivers/char/rio/riointr.c
+++ b/drivers/char/rio/riointr.c
@@ -102,7 +102,7 @@
 	struct rio_info *p;
 	struct tty_struct *tty;
 	int c;
-	struct PKT *PacketP;
+	struct PKT __iomem *PacketP;
 	unsigned long flags;
 
 	PortP = (struct Port *) en;
@@ -144,7 +144,7 @@
 		if (c == 0)
 			break;
 
-		rio_memcpy_toio(PortP->HostP->Caddr, (caddr_t) PacketP->data, PortP->gs.xmit_buf + PortP->gs.xmit_tail, c);
+		rio_memcpy_toio(PortP->HostP->Caddr, PacketP->data, PortP->gs.xmit_buf + PortP->gs.xmit_tail, c);
 		/*    udelay (1); */
 
 		writeb(c, &(PacketP->len));
@@ -219,7 +219,7 @@
 		for (port = p->RIOFirstPortsBooted; port < p->RIOLastPortsBooted + PORTS_PER_RTA; port++) {
 			struct Port *PortP = p->RIOPortp[port];
 			struct tty_struct *ttyP;
-			struct PKT *PacketP;
+			struct PKT __iomem *PacketP;
 
 			/*
 			 ** not mapped in - most of the RIOPortp[] information
@@ -298,7 +298,7 @@
 		for (port = p->RIOFirstPortsBooted; port < p->RIOLastPortsBooted + PORTS_PER_RTA; port++) {
 			struct Port *PortP = p->RIOPortp[port];
 			struct tty_struct *ttyP;
-			struct PKT *PacketP;
+			struct PKT __iomem *PacketP;
 
 			/*
 			 ** not mapped in - most of the RIOPortp[] information
@@ -427,13 +427,13 @@
 
 				while (PortP->WflushFlag && can_add_transmit(&PacketP, PortP) && (PortP->InUse == NOT_INUSE)) {
 					int p;
-					struct PktCmd *PktCmdP;
+					struct PktCmd __iomem *PktCmdP;
 
 					rio_dprintk(RIO_DEBUG_INTR, "Add WFLUSH marker to data queue\n");
 					/*
 					 ** make it look just like a WFLUSH command
 					 */
-					PktCmdP = (struct PktCmd *) &PacketP->data[0];
+					PktCmdP = (struct PktCmd __iomem *) &PacketP->data[0];
 
 					writeb(WFLUSH, &PktCmdP->Command);
 
@@ -525,9 +525,9 @@
 {
 	struct tty_struct *TtyP;
 	unsigned short transCount;
-	struct PKT *PacketP;
+	struct PKT __iomem *PacketP;
 	register unsigned int DataCnt;
-	unsigned char *ptr;
+	unsigned char __iomem *ptr;
 	unsigned char *buf;
 	int copied = 0;
 
@@ -625,7 +625,7 @@
 			 ** to '#define', (this is the only place ___DEBUG_IT___ occurs in the
 			 ** driver).
 			 */
-			ptr = (unsigned char *) PacketP->data + PortP->RxDataStart;
+			ptr = (unsigned char __iomem *) PacketP->data + PortP->RxDataStart;
 
 			tty_prepare_flip_string(TtyP, &buf, transCount);
 			rio_memcpy_fromio(buf, ptr, transCount);
diff --git a/drivers/char/rio/rioparam.c b/drivers/char/rio/rioparam.c
index d2e8092..1066d97 100644
--- a/drivers/char/rio/rioparam.c
+++ b/drivers/char/rio/rioparam.c
@@ -154,8 +154,8 @@
 {
 	struct tty_struct *TtyP;
 	int retval;
-	struct phb_param *phb_param_ptr;
-	struct PKT *PacketP;
+	struct phb_param __iomem *phb_param_ptr;
+	struct PKT __iomem *PacketP;
 	int res;
 	u8 Cor1 = 0, Cor2 = 0, Cor4 = 0, Cor5 = 0;
 	u8 TxXon = 0, TxXoff = 0, RxXon = 0, RxXoff = 0;
@@ -235,7 +235,7 @@
 	rio_dprintk(RIO_DEBUG_PARAM, "can_add_transmit() returns %x\n", res);
 	rio_dprintk(RIO_DEBUG_PARAM, "Packet is %p\n", PacketP);
 
-	phb_param_ptr = (struct phb_param *) PacketP->data;
+	phb_param_ptr = (struct phb_param __iomem *) PacketP->data;
 
 
 	switch (TtyP->termios->c_cflag & CSIZE) {
@@ -580,11 +580,11 @@
 ** We can add another packet to a transmit queue if the packet pointer pointed
 ** to by the TxAdd pointer has PKT_IN_USE clear in its address.
 */
-int can_add_transmit(struct PKT **PktP, struct Port *PortP)
+int can_add_transmit(struct PKT __iomem **PktP, struct Port *PortP)
 {
-	struct PKT *tp;
+	struct PKT __iomem *tp;
 
-	*PktP = tp = (struct PKT *) RIO_PTR(PortP->Caddr, readw(PortP->TxAdd));
+	*PktP = tp = (struct PKT __iomem *) RIO_PTR(PortP->Caddr, readw(PortP->TxAdd));
 
 	return !((unsigned long) tp & PKT_IN_USE);
 }
@@ -608,9 +608,9 @@
  * Put a packet onto the end of the
  * free list
  ****************************************/
-void put_free_end(struct Host *HostP, struct PKT *PktP)
+void put_free_end(struct Host *HostP, struct PKT __iomem *PktP)
 {
-	struct rio_free_list *tmp_pointer;
+	struct rio_free_list __iomem *tmp_pointer;
 	unsigned short old_end, new_end;
 	unsigned long flags;
 
@@ -625,15 +625,15 @@
 
 	if ((old_end = readw(&HostP->ParmMapP->free_list_end)) != TPNULL) {
 		new_end = RIO_OFF(HostP->Caddr, PktP);
-		tmp_pointer = (struct rio_free_list *) RIO_PTR(HostP->Caddr, old_end);
+		tmp_pointer = (struct rio_free_list __iomem *) RIO_PTR(HostP->Caddr, old_end);
 		writew(new_end, &tmp_pointer->next);
-		writew(old_end, &((struct rio_free_list *) PktP)->prev);
-		writew(TPNULL, &((struct rio_free_list *) PktP)->next);
+		writew(old_end, &((struct rio_free_list __iomem *) PktP)->prev);
+		writew(TPNULL, &((struct rio_free_list __iomem *) PktP)->next);
 		writew(new_end, &HostP->ParmMapP->free_list_end);
 	} else {		/* First packet on the free list this should never happen! */
 		rio_dprintk(RIO_DEBUG_PFE, "put_free_end(): This should never happen\n");
 		writew(RIO_OFF(HostP->Caddr, PktP), &HostP->ParmMapP->free_list_end);
-		tmp_pointer = (struct rio_free_list *) PktP;
+		tmp_pointer = (struct rio_free_list __iomem *) PktP;
 		writew(TPNULL, &tmp_pointer->prev);
 		writew(TPNULL, &tmp_pointer->next);
 	}
@@ -647,10 +647,10 @@
 ** relevant packet, [having cleared the PKT_IN_USE bit]. If PKT_IN_USE is clear,
 ** then can_remove_receive() returns 0.
 */
-int can_remove_receive(struct PKT **PktP, struct Port *PortP)
+int can_remove_receive(struct PKT __iomem **PktP, struct Port *PortP)
 {
 	if (readw(PortP->RxRemove) & PKT_IN_USE) {
-		*PktP = (struct PKT *) RIO_PTR(PortP->Caddr, readw(PortP->RxRemove) & ~PKT_IN_USE);
+		*PktP = (struct PKT __iomem *) RIO_PTR(PortP->Caddr, readw(PortP->RxRemove) & ~PKT_IN_USE);
 		return 1;
 	}
 	return 0;
diff --git a/drivers/char/rio/rioroute.c b/drivers/char/rio/rioroute.c
index 3570853..376d0e3 100644
--- a/drivers/char/rio/rioroute.c
+++ b/drivers/char/rio/rioroute.c
@@ -86,9 +86,9 @@
 ** Incoming on the ROUTE_RUP
 ** I wrote this while I was tired. Forgive me.
 */
-int RIORouteRup(struct rio_info *p, unsigned int Rup, struct Host *HostP, struct PKT * PacketP)
+int RIORouteRup(struct rio_info *p, unsigned int Rup, struct Host *HostP, struct PKT __iomem * PacketP)
 {
-	struct PktCmd *PktCmdP = (struct PktCmd *) PacketP->data;
+	struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *) PacketP->data;
 	struct PktCmd_M *PktReplyP;
 	struct CmdBlk *CmdBlkP;
 	struct Port *PortP;
@@ -517,8 +517,8 @@
 
 		for (port = 0; port < PORTS_PER_RTA; port++, PortN++) {
 			unsigned short dest_port = port + 8;
-			u16 *TxPktP;
-			struct PKT *Pkt;
+			u16 __iomem *TxPktP;
+			struct PKT __iomem *Pkt;
 
 			PortP = p->RIOPortp[PortN];
 
@@ -555,12 +555,12 @@
 				 ** card. This needs to be translated into a 32 bit pointer
 				 ** so it can be accessed from the driver.
 				 */
-				Pkt = (struct PKT *) RIO_PTR(HostP->Caddr, readw(TxPktP));
+				Pkt = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(TxPktP));
 
 				/*
 				 ** If the packet is used, reset it.
 				 */
-				Pkt = (struct PKT *) ((unsigned long) Pkt & ~PKT_IN_USE);
+				Pkt = (struct PKT __iomem *) ((unsigned long) Pkt & ~PKT_IN_USE);
 				writeb(dest_unit, &Pkt->dest_unit);
 				writeb(dest_port, &Pkt->dest_port);
 			}
diff --git a/drivers/char/rio/riotable.c b/drivers/char/rio/riotable.c
index d3abe0d..364119e 100644
--- a/drivers/char/rio/riotable.c
+++ b/drivers/char/rio/riotable.c
@@ -534,8 +534,8 @@
 						if (PortP->SecondBlock) {
 							u16 dest_unit = HostMapP->ID;
 							u16 dest_port = port - SysPort;
-							u16 *TxPktP;
-							struct PKT *Pkt;
+							u16 __iomem *TxPktP;
+							struct PKT __iomem *Pkt;
 
 							for (TxPktP = PortP->TxStart; TxPktP <= PortP->TxEnd; TxPktP++) {
 								/*
@@ -545,7 +545,7 @@
 								 ** a 32 bit pointer so it can be
 								 ** accessed from the driver.
 								 */
-								Pkt = (struct PKT *) RIO_PTR(HostP->Caddr, readw(&*TxPktP));
+								Pkt = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(&*TxPktP));
 								rio_dprintk(RIO_DEBUG_TABLE, "Tx packet (%x) destination: Old %x:%x New %x:%x\n", *TxPktP, Pkt->dest_unit, Pkt->dest_port, dest_unit, dest_port);
 								writew(dest_unit, &Pkt->dest_unit);
 								writew(dest_port, &Pkt->dest_port);
@@ -781,13 +781,13 @@
 		 ** unless the host has been booted
 		 */
 		if ((HostP->Flags & RUN_STATE) == RC_RUNNING) {
-			struct PHB *PhbP = PortP->PhbP = &HostP->PhbP[HostPort];
-			PortP->TxAdd = (u16 *) RIO_PTR(HostP->Caddr, readw(&PhbP->tx_add));
-			PortP->TxStart = (u16 *) RIO_PTR(HostP->Caddr, readw(&PhbP->tx_start));
-			PortP->TxEnd = (u16 *) RIO_PTR(HostP->Caddr, readw(&PhbP->tx_end));
-			PortP->RxRemove = (u16 *) RIO_PTR(HostP->Caddr, readw(&PhbP->rx_remove));
-			PortP->RxStart = (u16 *) RIO_PTR(HostP->Caddr, readw(&PhbP->rx_start));
-			PortP->RxEnd = (u16 *) RIO_PTR(HostP->Caddr, readw(&PhbP->rx_end));
+			struct PHB __iomem *PhbP = PortP->PhbP = &HostP->PhbP[HostPort];
+			PortP->TxAdd = (u16 __iomem *) RIO_PTR(HostP->Caddr, readw(&PhbP->tx_add));
+			PortP->TxStart = (u16 __iomem *) RIO_PTR(HostP->Caddr, readw(&PhbP->tx_start));
+			PortP->TxEnd = (u16 __iomem *) RIO_PTR(HostP->Caddr, readw(&PhbP->tx_end));
+			PortP->RxRemove = (u16 __iomem *) RIO_PTR(HostP->Caddr, readw(&PhbP->rx_remove));
+			PortP->RxStart = (u16 __iomem *) RIO_PTR(HostP->Caddr, readw(&PhbP->rx_start));
+			PortP->RxEnd = (u16 __iomem *) RIO_PTR(HostP->Caddr, readw(&PhbP->rx_end));
 		} else
 			PortP->PhbP = NULL;
 
diff --git a/drivers/char/rio/riotty.c b/drivers/char/rio/riotty.c
index 2042676..a4f0b1e 100644
--- a/drivers/char/rio/riotty.c
+++ b/drivers/char/rio/riotty.c
@@ -576,7 +576,7 @@
 */
 int RIOShortCommand(struct rio_info *p, struct Port *PortP, int command, int len, int arg)
 {
-	struct PKT *PacketP;
+	struct PKT __iomem *PacketP;
 	int retries = 20;	/* at 10 per second -> 2 seconds */
 	unsigned long flags;
 
diff --git a/drivers/char/rio/unixrup.h b/drivers/char/rio/unixrup.h
index 4306e01..46bd532 100644
--- a/drivers/char/rio/unixrup.h
+++ b/drivers/char/rio/unixrup.h
@@ -44,7 +44,7 @@
 struct UnixRup {
 	struct CmdBlk *CmdsWaitingP;	/* Commands waiting to be done */
 	struct CmdBlk *CmdPendingP;	/* The command currently being sent */
-	struct RUP *RupP;	/* the Rup to send it to */
+	struct RUP __iomem *RupP;	/* the Rup to send it to */
 	unsigned int Id;		/* Id number */
 	unsigned int BaseSysPort;	/* SysPort of first tty on this RTA */
 	unsigned int ModTypes;		/* Modules on this RTA */