linux-kernel - Re: [PATCH 4/5] serial: convert early

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Date:	Thu, 31 May 2007 09:17:18 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Yinghai Lu" <yhlu.kernel@...il.com>, "Andi Kleen" <ak@...e.de>,
	"Russell King" <rmk@....linux.org.uk>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/5] serial: convert early_uart to earlycon for 8250

On Wednesday 30 May 2007 10:48:59 pm Andrew Morton wrote:
> On Wed, 30 May 2007 21:36:41 -0700 "Yinghai Lu" <yhlu.kernel@...il.com> wrote:
> 
> > On 5/30/07, Yinghai Lu <yhlu.kernel@...il.com> wrote:
> > > On 5/30/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
> > > > On Tue, 29 May 2007 18:43:59 -0700 Yinghai Lu <Yinghai.Lu@....COM> wrote:
> > > >
> > > > > [PATCH 4/5] serial: convert early_uart to earlycon for 8250
> > > >
> > > > drivers/serial/8250_early.c: In function 'parse_options':
> > > > drivers/serial/8250_early.c:143: error: 'FIX_EARLYCON_MEM_BASE' undeclared (first use in this function)
> > > > drivers/serial/8250_early.c:143: error: (Each undeclared identifier is reported only once
> > > >
> > > > That was with http://userweb.kernel.org/~akpm/config-sony.txt, but this is
> > > > going to break a whole pile of architectures (alpha, powerpc, others).
> > >
> > > alpha, powerpc, others may need sth like ia64, if they do not support fixmap.
> > 
> > or create dummy fixmap.h that doesn't support fixmap.
> 
> You could require that the architecture implement some specific function
> for mapping the early-uart.

We could, but we already have bt_ioremap, dmi_ioremap, and early_ioremap.
Do we really want to proliferate more flavors of "early ioremap"?  I'd
rather consolidate the ones we already have.
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