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Date: Wed, 7 Jan 2004 09:31:43 +0000
From: Russell King <rmk+lkml@arm.linux.org.uk>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Linus Torvalds <torvalds@osdl.org>, Andi Kleen <ak@colin2.muc.de>,
       Mika Penttil? <mika.penttila@kolumbus.fi>, Andi Kleen <ak@muc.de>,
       David Hinds <dhinds@sonic.net>, linux-kernel@vger.kernel.org
Subject: Re: PCI memory allocation bug with CONFIG_HIGHMEM
Message-ID: <20040107093143.A29200@flint.arm.linux.org.uk>
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	Linus Torvalds <torvalds@osdl.org>, Andi Kleen <ak@colin2.muc.de>,
	Mika Penttil? <mika.penttila@kolumbus.fi>, Andi Kleen <ak@muc.de>,
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References: <20040106040546.GA77287@colin2.muc.de> <Pine.LNX.4.58.0401052100380.2653@home.osdl.org> <20040106081203.GA44540@colin2.muc.de> <3FFA7BB9.1030803@kolumbus.fi> <20040106094442.GB44540@colin2.muc.de> <Pine.LNX.4.58.0401060726450.2653@home.osdl.org> <20040106153706.GA63471@colin2.muc.de> <m1brpgn1c3.fsf@ebiederm.dsl.xmission.com> <Pine.LNX.4.58.0401061554010.9166@home.osdl.org> <m13casmk28.fsf@ebiederm.dsl.xmission.com>
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On Tue, Jan 06, 2004 at 09:58:23PM -0700, Eric W. Biederman wrote:
> ffff0000-ffffffff : reserved
> 
> That last reserved region is 64K.  Which looking at the pci registers
> is technically correct at the moment.  Only 64K happen to be decoded.

We already have this distinction between in use (or busy) resources and
allocated resources.  Surely the BIOS ROM region should be an allocation
resource not a busy resource, so that the MTD driver can obtain a busy
resource against it?

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core