From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Fri, 09 Feb 2001 20:04:42 +0000 Subject: Re: [Linux-ia64] TODO list Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> On Fri, 9 Feb 2001 12:01:45 -0800, Don Dugger said: Don> It also isn't as easy to do as you might think. We were Don> looking into this at one time and you have to be really Don> carefull about stack management because you can wind up running Don> in kernel mode with a user stack pointer. This would cause Don> serious problems when an interrupt comes in. While I agree with the sentiment, I'd phrase it a little differently: it's not difficult to fix the assumption of "psr.cpl=0 => we're on the kernel stack". The difficulty is in proving that you fixed all the code that made that assumption... --david