Date: Mon, 13 Feb 2006 00:27:06 +0100
From: Marko <letterdrop@gmx.de>
To: linux-kernel@vger.kernel.org
Subject: How getting a pointer on the per-cpu struct tss_struct??
Message-Id: <20060213002706.50e5289c.letterdrop@gmx.de>
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Hello,

may anyone tell me where I'm wrong???


What I thought to have found:

I want to access the per-cpu IO Permission Bitmap. Therefore, I try to
get a pointer on the per-cpu struct tss_struct. I found an array of typ
'struct tss_struct' named 'init_tss' (declared in asm/processor.h with
'DECLARE_PER_CPU(struct tss_struct, init_tss);').

So I should be able to get a pointer on the struct tss_struct of the
current cpu, by using the following code:

	int cpu = get_cpu();
	struct tss_struct * t = &per_cpu(init_tss, cpu);

But when I try to compile this, I get the warning:

	*** Warning: "per_cpu__init_tss" [/home/..../module.ko]
	undefined!

and according to this warning an error, when I try to load the module:

	insmod: error inserting 'module.ko': -1 Unknown symbol in module


(I'm using gcc4.0.2 and kernel 2.6.14.2)


Where's my problem??

Thanks,


Marko Euth
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