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Date: Thu, 25 Sep 2008 11:14:49 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
CC: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH v2 -tip 0/4] x86: signal handler improvement
References: <48DBD396.5020103@ct.jp.nec.com>
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Hiroshi Shimamoto wrote:
> 
> and errors in __put_user is stored to stack.
> At the end of function, all errors in stack are calculated. If access to user
> space is failed, %edx is set to -EFAULT in exception handler and stored to
> stack for later operation.
> It seems inefficient.
> 

This is a gcc failure, and should be reported to the gcc people.

	-hpa