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

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Date:	Thu, 31 May 2007 09:32:42 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Bjorn Helgaas" <bjorn.helgaas@...com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"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 5/31/07, Bjorn Helgaas <bjorn.helgaas@...com> wrote:
> On Wednesday 30 May 2007 10:48:59 pm Andrew Morton wrote:
> > 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.
>
not really.

dhcp-umpk12-63-201:/home/yhlu/xx/xx/kernel/linux-2.6/include # grep
bt_ioremap * -r
asm-i386/dmi.h:#define dmi_ioremap bt_ioremap
asm-i386/io.h: * bt_ioremap() and bt_iounmap() are for temporary early boot-time
asm-i386/io.h:extern void *bt_ioremap(unsigned long offset, unsigned long size);
asm-i386/io.h:#define dmi_ioremap bt_ioremap

dhcp-umpk12-63-201:/home/yhlu/xx/xx/kernel/linux-2.6/include # grep
early_ioremap * -r
asm-x86_64/dmi.h:#define dmi_ioremap early_ioremap
asm-x86_64/io.h:extern void *early_ioremap(unsigned long addr,
unsigned long size);

dhcp-umpk12-63-201:/home/yhlu/xx/xx/kernel/linux-2.6/include # grep
dmi_ioremap * -r
asm-i386/dmi.h:#define dmi_ioremap bt_ioremap
asm-i386/io.h:#define dmi_ioremap bt_ioremap
asm-ia64/io.h:#define dmi_ioremap ioremap
asm-x86_64/dmi.h:extern void *dmi_ioremap(unsigned long addr, unsigned
long size);
asm-x86_64/dmi.h:#define dmi_ioremap early_ioremap

YH
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