From mboxrd@z Thu Jan  1 00:00:00 1970
From: presotto@plan9.bell-labs.com
Message-Id: <200007211315.JAA06317@cse.psu.edu>
Date: Fri, 21 Jul 2000 09:15:44 -0400
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Kernel question: i386 test-and-set problem
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I would have left the lock in if I could have figured out how to do
it and fix the other problems.  The main problem is that one side knows
p and the other side knows r.  If I have one lock, one side is going
to have to look at something not under a lock.  If I have two locks,
one in r and one in p, I can't figure out how to get them both to lock
in the same order.