From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 24 Aug 1996 00:18:34 -0400
From: Scott Schwartz schwartz@galapagos.cse.psu.edu
Subject: No subject
Topicbox-Message-UUID: 4b787a32-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19960824041834.HIAIc_1OAb9nVUVn_9bLfrgk2exClsbVxil-J6zg5Q4@z>

philw@plan9.bell-labs.com writes:
| Put this in the library ...

I think /sys/src/alef/lib/port/rwlock.l is there already (sans
comments), although rwlock.$O isn't listed in the mkfile.