From d723d10e6dc567c65d62187ad013cbd4acc4a8d3 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 22 Sep 1991 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1991-09-22

---
 pc/mmu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pc/mmu.c b/pc/mmu.c
index a770f37cb8ad8acef09ea6f5754e1d295feb9ad3..903a8e0aac22926fa8abf6d3c0a6dc983b097391 100644
--- a/pc/mmu.c
+++ b/pc/mmu.c
@@ -69,6 +69,9 @@ Segdesc gdt[] =
 [TSSSEG]	TSSSEGM(0,0),		/* tss segment */
 };
 
+static ulong	*ktoppt;	/* prototype top level page table
+				 * containing kernel mappings
+				 */
 static ulong	*toppt;		/* top level page table */	
 static ulong	*kpt;		/* kernel level page tables */
 static ulong	*upt;		/* page table for struct User */