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Date: Sun, 26 Nov 2000 17:26:58 +0100
From: Andrea Arcangeli <andrea@suse.de>
To: Pavel Machek <pavel@suse.cz>
Cc: kernel list <linux-kernel@vger.kernel.org>
Subject: Re: kernel_thread bogosity
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In-Reply-To: <20001124205247.A141@bug.ucw.cz>; from pavel@suse.cz on Fri, Nov 24, 2000 at 08:52:47PM +0100
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On Fri, Nov 24, 2000 at 08:52:47PM +0100, Pavel Machek wrote:
> How can that work? restore_args ends with iret, anyway, and iret does
> reload esp afaics...

... only if there's an IPL change during the iret. Page 3-321 of 24319102.pdf
from Intel:

	[..] If the return is to another privilege level, the IRET instruction
	also pops the stack pointer and SS from the stack, before resuming
	program execution. [..]

Andrea
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