Use resource_size_t for serial port IO addresses

At present, various parts of the serial code use unsigned long to define
resource addresses.  This is a problem, because some 32-bit platforms have
physical addresses larger than 32-bits, and have mmio serial uarts located
above the 4GB point.

This patch changes the type of mapbase in both struct uart_port and struct
plat_serial8250_port to resource_size_t, which can be configured to be 64
bits on such platforms.  The mapbase in serial_struct can't safely be
changed, because that structure is user visible.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/serial/8250_early.c b/drivers/serial/8250_early.c
index 947c20507e1f..150cad5c2eba 100644
--- a/drivers/serial/8250_early.c
+++ b/drivers/serial/8250_early.c
@@ -151,8 +151,9 @@ static int __init parse_options(struct early_serial8250_device *device, char *op
 #else
                 port->membase = ioremap(port->mapbase, 64);
                 if (!port->membase) {
-                        printk(KERN_ERR "%s: Couldn't ioremap 0x%lx\n",
-                                __FUNCTION__, port->mapbase);
+                        printk(KERN_ERR "%s: Couldn't ioremap 0x%llx\n",
+                                __FUNCTION__,
+                               (unsigned long long)port->mapbase);
                         return -ENOMEM;
                 }
 #endif
@@ -175,9 +176,10 @@ static int __init parse_options(struct early_serial8250_device *device, char *op
                         device->baud);
         }
 
-        printk(KERN_INFO "Early serial console at %s 0x%lx (options '%s')\n",
+        printk(KERN_INFO "Early serial console at %s 0x%llx (options '%s')\n",
                 mmio ? "MMIO" : "I/O port",
-                mmio ? port->mapbase : (unsigned long) port->iobase,
+                mmio ? (unsigned long long) port->mapbase
+                     : (unsigned long long) port->iobase,
                 device->options);
         return 0;
 }