From 13de9fd35dd1e8c1cc031b63e92f11cdd40c4c4c Mon Sep 17 00:00:00 2001
From: "Michael I. Bushnell" <mib@gnu.org>
Date: Mon, 3 Oct 1994 18:54:58 +0000
Subject: entered into RCS

---
 ufs/mapbuf.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

(limited to 'ufs/mapbuf.c')

diff --git a/ufs/mapbuf.c b/ufs/mapbuf.c
index a323bdbc..edf432a5 100644
--- a/ufs/mapbuf.c
+++ b/ufs/mapbuf.c
@@ -21,13 +21,16 @@
 
 #include "ufs.h"
 
-#define MAXMAPMEM (1024 * 1024 * 1024) /* one Gb */
+struct mapbuf *mblist;
+spin_lock_t mblistlock = SPIN_LOCK_INITIALIZER;
 
-struct mapbuf 
+struct mapbuf *
+map_region (vm_offset_t diskloc, vm_size_t length)
 {
-  vm_size_t length;
-  vm_offset_t diskaddr;
-};
+  struct mapbuf *mb;
+  
+  /* Check to see if we are already mapping this region */
+  spin_lock (&mblistlock);
+  for (mb = mblist; mb; mb = mb->next)
+    {
 
-void *
-map_region 
-- 
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