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

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Message-Id: <20081016173811.b4fc7ba2.akpm@linux-foundation.org>
Date:	Thu, 16 Oct 2008 17:38:11 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Josh Boyer <jwboyer@...ux.vnet.ibm.com>
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 19:44:37 -0400 Josh Boyer <jwboyer@...ux.vnet.ibm.com> wrote:

> 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.
> 

Well.  It just got converted from uint to ulong and we're still fixing
the bugs which that introduced.
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