From 6efe82f1388aef952d326232ebfa97c1b9d52584 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Thu, 4 Apr 1991 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1991-04-04

---
 port/stream.c | 2 +-
 ss/mem.h      | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/port/stream.c b/port/stream.c
index 28b5bebcb02bbe3a392e65c991b21e548a18dc7a..f8ad0ed0268eee8762ab6254d5ed26f429df4a98 100644
--- a/port/stream.c
+++ b/port/stream.c
@@ -1249,7 +1249,7 @@ streamwrite(Chan *c, void *a, long n, int docopy)
 	if(q->other->flag & QHUNGUP)
 		error(Ehungup);
 
-	if(!docopy && GLOBAL(a)){
+	if(!docopy && isphys(a)){
 		/*
 		 *  `a' is global to the whole system, just create a
 		 *  pointer to it and pass it on.
diff --git a/ss/mem.h b/ss/mem.h
index 354bd05e8e06255f40b169f77197a32068d50e4c..b2abcdf1cbc0cf333fbe690a137099f6ad82d0fd 100644
--- a/ss/mem.h
+++ b/ss/mem.h
@@ -131,3 +131,5 @@
 
 #define	NSEG		5
 #define	MACHSIZE	4096
+
+#define isphys(x) ((((ulong)(x)&0xF0000000) == KZERO)