From: David Gibson 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 Cc: Russell King Cc: Alan Cox Cc: Ralf Baechle Cc: Oleksiy Kebkal Signed-off-by: Andrew Morton --- drivers/serial/8250.c | 5 +++-- drivers/serial/8250_early.c | 16 +++++++++------- drivers/serial/serial_core.c | 9 +++++---- include/linux/serial_8250.h | 2 +- include/linux/serial_core.h | 2 +- 5 files changed, 19 insertions(+), 15 deletions(-) diff -puN drivers/serial/8250.c~serial-use-resource_size_t-for-port-io-addresses drivers/serial/8250.c --- a/drivers/serial/8250.c~serial-use-resource_size_t-for-port-io-addresses +++ a/drivers/serial/8250.c @@ -2649,8 +2649,9 @@ static int __devinit serial8250_probe(st ret = serial8250_register_port(&port); if (ret < 0) { dev_err(&dev->dev, "unable to register port at index %d " - "(IO%lx MEM%lx IRQ%d): %d\n", i, - p->iobase, p->mapbase, p->irq, ret); + "(IO%lx MEM%llx IRQ%d): %d\n", i, + p->iobase, (unsigned long long)p->mapbase, + p->irq, ret); } } return 0; diff -puN drivers/serial/8250_early.c~serial-use-resource_size_t-for-port-io-addresses drivers/serial/8250_early.c --- a/drivers/serial/8250_early.c~serial-use-resource_size_t-for-port-io-addresses +++ a/drivers/serial/8250_early.c @@ -145,8 +145,9 @@ static int __init parse_options(struct e port->mapbase = simple_strtoul(options + 5, &options, 0); port->membase = ioremap(port->mapbase, mapsize); 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; } mmio = 1; @@ -168,9 +169,10 @@ static int __init parse_options(struct e 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; } @@ -236,10 +238,10 @@ static int __init early_uart_console_swi mmio = (port->iotype == UPIO_MEM); line = serial8250_start_console(port, device->options); if (line < 0) - printk("No ttyS device at %s 0x%lx for console\n", + printk("No ttyS device at %s 0x%llx for console\n", mmio ? "MMIO" : "I/O port", - mmio ? port->mapbase : - (unsigned long) port->iobase); + mmio ? (unsigned long long) port->mapbase + : (unsigned long long) port->iobase); unregister_console(&early_uart_console); if (mmio) diff -puN drivers/serial/serial_core.c~serial-use-resource_size_t-for-port-io-addresses drivers/serial/serial_core.c --- a/drivers/serial/serial_core.c~serial-use-resource_size_t-for-port-io-addresses +++ a/drivers/serial/serial_core.c @@ -626,7 +626,7 @@ static int uart_get_info(struct uart_sta tmp.hub6 = port->hub6; tmp.io_type = port->iotype; tmp.iomem_reg_shift = port->regshift; - tmp.iomem_base = (void *)port->mapbase; + tmp.iomem_base = (void *)(unsigned long)port->mapbase; if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) return -EFAULT; @@ -1666,10 +1666,11 @@ static int uart_line_info(char *buf, str return 0; mmio = port->iotype >= UPIO_MEM; - ret = sprintf(buf, "%d: uart:%s %s%08lX irq:%d", + ret = sprintf(buf, "%d: uart:%s %s%08llX irq:%d", port->line, uart_type(port), mmio ? "mmio:0x" : "port:", - mmio ? port->mapbase : (unsigned long) port->iobase, + mmio ? (unsigned long long)port->mapbase + : (unsigned long long) port->iobase, port->irq); if (port->type == PORT_UNKNOWN) { @@ -2063,7 +2064,7 @@ uart_report_port(struct uart_driver *drv case UPIO_TSI: case UPIO_DWAPB: snprintf(address, sizeof(address), - "MMIO 0x%lx", port->mapbase); + "MMIO 0x%llx", (unsigned long long)port->mapbase); break; default: strlcpy(address, "*unknown*", sizeof(address)); diff -puN include/linux/serial_8250.h~serial-use-resource_size_t-for-port-io-addresses include/linux/serial_8250.h --- a/include/linux/serial_8250.h~serial-use-resource_size_t-for-port-io-addresses +++ a/include/linux/serial_8250.h @@ -20,7 +20,7 @@ struct plat_serial8250_port { unsigned long iobase; /* io base address */ void __iomem *membase; /* ioremap cookie or NULL */ - unsigned long mapbase; /* resource base */ + resource_size_t mapbase; /* resource base */ unsigned int irq; /* interrupt number */ unsigned int uartclk; /* UART clock rate */ unsigned char regshift; /* register shift */ diff -puN include/linux/serial_core.h~serial-use-resource_size_t-for-port-io-addresses include/linux/serial_core.h --- a/include/linux/serial_core.h~serial-use-resource_size_t-for-port-io-addresses +++ a/include/linux/serial_core.h @@ -279,7 +279,7 @@ struct uart_port { const struct uart_ops *ops; unsigned int custom_divisor; unsigned int line; /* port index */ - unsigned long mapbase; /* for ioremap */ + resource_size_t mapbase; /* for ioremap */ struct device *dev; /* parent device */ unsigned char hub6; /* this should be in the 8250 driver */ unsigned char unused[3]; _