[WATCHDOG] wdt285: fix sparse warnings

The wdt285.c watchdog driver is producing a number of
sparse errors due to missing __user attributes to calls
to put_user and copy_to_user, as well as in the prototype
of watchdog_write.

wdt285.c:144:21: warning: incorrect type in argument 1 (different address spaces)
wdt285.c:144:21: expected void [noderef] <asn:1>*to
wdt285.c:144:21: got void *<noident>
wdt285.c:150:9: warning: incorrect type in initializer (different address spaces)
wdt285.c:150:9: expected int const [noderef] <asn:1>*register __p
wdt285.c:150:9: got int *<noident>
wdt285.c:159:9: warning: incorrect type in initializer (different address spaces)
wdt285.c:159:9: expected int const [noderef] <asn:1>*register __p
wdt285.c:159:9: got int *<noident>
wdt285.c:174:9: warning: incorrect type in initializer (different address spaces)
wdt285.c:174:9: expected int const [noderef] <asn:1>*register __p
wdt285.c:174:9: got int *<noident>
wdt285.c:183:12: warning: incorrect type in initializer (incompatible argument 2 (different address spaces))
wdt285.c:183:12: expected int ( *write )( ... )
wdt285.c:183:12: got int ( static [toplevel] *<noident> )( ... )

Signed-off-by: Ben Dooks <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

drivers/watchdog/wdt285.c

···
 	return 0;
 }
 
-static ssize_t watchdog_write(struct file *file, const char *data,
-						size_t len, loff_t *ppos)
+static ssize_t watchdog_write(struct file *file, const char __user *data,
+			      size_t len, loff_t *ppos)
 {
 	/*
 	 *	Refresh the timer.
···
 };
 
 static long watchdog_ioctl(struct file *file, unsigned int cmd,
-							unsigned long arg)
+			   unsigned long arg)
 {
 	unsigned int new_margin;
+	int __user *int_arg = (int __user *)arg;
 	int ret = -ENOTTY;
 
 	switch (cmd) {
 	case WDIOC_GETSUPPORT:
 		ret = 0;
-		if (copy_to_user((void *)arg, &ident, sizeof(ident)))
+		if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
 			ret = -EFAULT;
 		break;
 
 	case WDIOC_GETSTATUS:
 	case WDIOC_GETBOOTSTATUS:
-		ret = put_user(0, (int *)arg);
+		ret = put_user(0, int_arg);
 		break;
 
 	case WDIOC_KEEPALIVE:
···
 		break;
 
 	case WDIOC_SETTIMEOUT:
-		ret = get_user(new_margin, (int *)arg);
+		ret = get_user(new_margin, int_arg);
 		if (ret)
 			break;
 
···
 		watchdog_ping();
 		/* Fall */
 	case WDIOC_GETTIMEOUT:
-		ret = put_user(soft_margin, (int *)arg);
+		ret = put_user(soft_margin, int_arg);
 		break;
 	}
 	return ret;