[PATCH] Use resource_size_t for serial port IO addresses

Josh Boyer jwboyer at linux.vnet.ibm.com
Sat Jul 14 05:24:41 EST 2007

On Fri, 2007-07-13 at 12:02 -0700, Andrew Morton wrote:
> On Fri, 13 Jul 2007 09:02:16 -0500
> Josh Boyer <jwboyer at linux.vnet.ibm.com> wrote:
> > This is a resend of a patch David sent out on May 7.  Without it, the
> > PowerPC 44x port in 2.6.22 and on is broken.  I've rebased it off of
> > Linus' current tree.  Please consider pushing this soon.
> > 
> > josh
> > 
> > 
> > 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.
> This is something we should do, but I have recollections of Russell
> identifying problems with this patch, or at least an earlier version of it?

I can't recall myself if there were problems or not.  I thought David
had worked that out with Russell, but I could be mistaken.

> > Signed-off-by: David Gibson <dwg at au1.ibm.com>
> This should have had Signed-off-by:you as well.

Oops, for the rebase I suppose, yes.  Is the one below enough or do you
want me to resubmit?

Signed-off-by: Josh Boyer <jwboyer at linux.vnet.ibm.com>


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