From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [patch 2.6.12-rc5] Module gp must point to valid memory
Date: Mon, 06 Jun 2005 17:06:28 +0000 [thread overview]
Message-ID: <17060.33428.446753.641603@napali.hpl.hp.com> (raw)
In-Reply-To: <7136.1118048668@kao2.melbourne.sgi.com>
>>>>> On Mon, 06 Jun 2005 19:04:28 +1000, Keith Owens <kaos@sgi.com> said:
Keith> Some bits of the kernel assume that gp always points to valid memory,
Keith> in particular PHYSICAL_MODE_ENTER() assumes that both gp and sp are
Keith> valid virtual addresses with associated physical pages.
Ah, another "fun" issue caused by putting the text in region 5...
I think the real issue are the "tpa" instructions. For those to work,
there must be a valid va -> pa translation. It's not like the memory
that gp points to is every accessed.
The patch looks fine to me.
--david
prev parent reply other threads:[~2005-06-06 17:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-06 9:04 [patch 2.6.12-rc5] Module gp must point to valid memory Keith Owens
2005-06-06 17:06 ` David Mosberger [this message]
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