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Date: Tue, 29 Aug 2006 12:03:25 -0700
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Andi Kleen <ak@suse.de>, Zachary Amsden <zach@vmware.com>,
       Linus Torvalds <torvalds@osdl.org>,
       Chuck Ebbert <76306.1226@compuserve.com>
Subject: Why set ORIG_EAX(%esp) to -1 in arch/i386/kernel/entry.S:error_code?
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There doesn't seem much point; nothing seems to use it on the 
trap-handling paths.  Is it a historical left-over?

    J