diff --git a/drivers/char/watchdog/booke_wdt.c b/drivers/char/watchdog/booke_wdt.c
index 65830ec..c800cce 100644
--- a/drivers/char/watchdog/booke_wdt.c
+++ b/drivers/char/watchdog/booke_wdt.c
@@ -72,7 +72,7 @@
 /*
  * booke_wdt_write:
  */
-static ssize_t booke_wdt_write (struct file *file, const char *buf,
+static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
 				size_t count, loff_t *ppos)
 {
 	booke_wdt_ping();
@@ -92,14 +92,15 @@
 			    unsigned int cmd, unsigned long arg)
 {
 	u32 tmp = 0;
+	u32 __user *p = (u32 __user *)arg;
 
 	switch (cmd) {
 	case WDIOC_GETSUPPORT:
-		if (copy_to_user ((struct watchdog_info *) arg, &ident,
+		if (copy_to_user ((struct watchdog_info __user *) arg, &ident,
 				sizeof(struct watchdog_info)))
 			return -EFAULT;
 	case WDIOC_GETSTATUS:
-		return put_user(ident.options, (u32 *) arg);
+		return put_user(ident.options, p);
 	case WDIOC_GETBOOTSTATUS:
 		/* XXX: something is clearing TSR */
 		tmp = mfspr(SPRN_TSR) & TSR_WRS(3);
@@ -109,14 +110,14 @@
 		booke_wdt_ping();
 		return 0;
 	case WDIOC_SETTIMEOUT:
-		if (get_user(booke_wdt_period, (u32 *) arg))
+		if (get_user(booke_wdt_period, p))
 			return -EFAULT;
 		mtspr(SPRN_TCR, (mfspr(SPRN_TCR)&~WDTP(0))|WDTP(booke_wdt_period));
 		return 0;
 	case WDIOC_GETTIMEOUT:
-		return put_user(booke_wdt_period, (u32 *) arg);
+		return put_user(booke_wdt_period, p);
 	case WDIOC_SETOPTIONS:
-		if (get_user(tmp, (u32 *) arg))
+		if (get_user(tmp, p))
 			return -EINVAL;
 		if (tmp == WDIOS_ENABLECARD) {
 			booke_wdt_ping();