From 439128b4b0ebf780827c8da6a29e3bd39aed6a13 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 15 Oct 1996 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1996-10-15

---
 port/portdat.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/port/portdat.h b/port/portdat.h
index 81101525ab74350f5093b24ce7beab0b3e27ee47..a3fe20af00e220358a95c265229f94a773f11844 100644
--- a/port/portdat.h
+++ b/port/portdat.h
@@ -555,6 +555,7 @@ struct Proc
 	int	procctl;	/* Control for /proc debugging */
 	ulong	pc;		/* DEBUG only */
 
+	Lock	rlock;		/* synchronization for 'r' below */
 	Rendez	*r;		/* rendezvous point slept on */
 	Rendez	sleep;		/* place for syssleep/debug */
 	int	notepending;	/* note issued but not acted on */