From 3bb45eb81e677b4c92cc328cd0e580bd32ccc663 Mon Sep 17 00:00:00 2001
From: "Michael I. Bushnell" <mib@gnu.org>
Date: Tue, 2 May 1995 15:59:06 +0000
Subject: (pager_clear_user_data): Acquire pagerlistlock around modifications
 to UPI->next/prevp list structure.

---
 ufs/pager.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'ufs')

diff --git a/ufs/pager.c b/ufs/pager.c
index d41b792d..f403df64 100644
--- a/ufs/pager.c
+++ b/ufs/pager.c
@@ -1,5 +1,5 @@
 /* Pager for ufs
-   Copyright (C) 1994 Free Software Foundation
+   Copyright (C) 1994, 1995 Free Software Foundation
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
@@ -363,9 +363,11 @@ pager_clear_user_data (struct user_pager_info *upi)
   upi->np->dn->fileinfo = 0;
   spin_unlock (&node2pagelock);
   diskfs_nrele_light (upi->np);
+  spin_lock (&pagerlistlock);
   *upi->prevp = upi->next;
   if (upi->next)
     upi->next->prevp = upi->prevp;
+  spin_unlock (&pagerlistlock);
   free (upi);
 }
 
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