From 73bb14d8e327de2d5bc341995813fc7c014b79df Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 4 Oct 1992 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1992-10-04

---
 pc/mmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pc/mmu.c b/pc/mmu.c
index a8679fff4921e3ab50ec62f12cf68e88274072b8..9f21f9cc16f7fd09ba0ef00ddf5e7d407585a41f 100644
--- a/pc/mmu.c
+++ b/pc/mmu.c
@@ -91,6 +91,7 @@ static ulong	*upt;		/* 2nd level page table for struct User */
 
 struct
 {
+	Lock;
 	ulong addr; 	/* next available address for isa bus memory */
 	ulong end;	/* one past available isa bus memory */
 } isamemalloc;