linux-kernel - Re: [PATCH] serial: Make uart_port's ioport "resource_size

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Message-ID: <20081016194437.14c7604b@zod.rchland.ibm.com>
Date:	Thu, 16 Oct 2008 19:44:37 -0400
From:	Josh Boyer <jwboyer@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	davem@...emloft.net, alan@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] serial: Make uart_port's ioport "resource_size_t"

On Thu, 16 Oct 2008 14:46:45 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Tue, 14 Oct 2008 12:26:21 -0400
> Josh Boyer <jwboyer@...ux.vnet.ibm.com> wrote:
> 
> > Recently uart_port's iobase was changed to be an 'unsigned
> > long' to avoid chopping off the upper 32-bits of the
> > address on 64-bit CPUs.  However, there are CPUs that are
> > 32-bit but have a 64-bit address space.  This changes
> > iobase to be 'resource_size_t' to accommodate those types
> > of systems.  This also matches what is done for the mapbase
> > member of uart_port.
> > 
> > Signed-off-by: Josh Boyer <jwboyer@...ux.vnet.ibm.com>
> > 
> > ---
> > 
> > diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
> > index e27f216..cb0185b 100644
> > --- a/include/linux/serial_core.h
> > +++ b/include/linux/serial_core.h
> > @@ -241,7 +241,7 @@ typedef unsigned int __bitwise__ upf_t;
> >  
> >  struct uart_port {
> >  	spinlock_t		lock;			/* port lock */
> > -	unsigned long		iobase;			/* in/out[bwl] */
> > +	resource_size_t		iobase;			/* in/out[bwl] */
> >  	unsigned char __iomem	*membase;		/* read/write[bwl] */
> >  	unsigned int		irq;			/* irq number */
> >  	unsigned int		uartclk;		/* base uart clock */
> 
> This will of course require that all now-broken printk()s be unbroken. 
> I spot two in serial_core.c alone.

Yes, I know that.  There's a patch, or at least a discussion, floating
around on how to fix this with a %pX thing right?  We can delay this
until that comes to fruition if you'd like.

josh
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