linux-kernel - RE: NonExecutable Bit in 32Bit

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Date:	Wed, 25 Apr 2007 12:28:51 +0200
From:	"Cestonaro, Thilo \(external\)" 
	<Thilo.Cestonaro.external@...itsu-siemens.com>
To:	"Marat Buharov" <marat.buharov@...il.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: RE: NonExecutable Bit in 32Bit

> > And this prevents the lowmemory to be secured by NX?
> What do you mean, when you say "lowmemory"?

I mean EF-Segments. Cause we got a kernel oops as we accidentally used ioremap_nocache on a EF-Segment address.
Before that usage the EF-Segments weren't secured, afterwards they were.
We use now ioremap which does the high low mem check, but I was a bit confused that NX was not active before.
But I can't provide any further informations about the system, cause it was more or less support for a customer.

Ciao Thilo
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