linux-kernel - Re: [patch 5/5] i8253: Cleanup outb/inb magic

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Message-ID: <20110609133448.GA8772@linux-mips.org>
Date:	Thu, 9 Jun 2011 14:34:48 +0100
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	Ingo Molnar <mingo@...e.hu>,
	John Stultz <john.stultz@...aro.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [patch 5/5] i8253: Cleanup outb/inb magic

On Thu, Jun 09, 2011 at 01:08:30PM -0000, Thomas Gleixner wrote:

> Remove the hysterical outb/inb_pit defines and use outb_p/inb_p in the
> code.

FWIW, I've traced the use of inb_p and outb_p to access the PIT timer
all the way back to Linux 0.10

I wonder if any of the systems affected actually has enough memory to boot
a modern kernel or if the _p versions have become useless bagagge that
should be dropped - cleanup which would then also allow more code to the
iomap() API.

I'm interested because quite a few MIPS systems have been built based on
Intel, OPTi and other chipsets which may or may not have been affected.

  Ralf
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