From 848d1906e81992c78bee9e9ce5a5d38e107265cc Mon Sep 17 00:00:00 2001
From: Frans Kaashoek <kaashoek@mit.edu>
Date: Tue, 30 Jul 2019 12:53:19 -0400
Subject: Track in buf if disk "owns" buffer

---
 kernel/buf.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'kernel/buf.h')

diff --git a/kernel/buf.h b/kernel/buf.h
index ae9d264..4a3a39d 100644
--- a/kernel/buf.h
+++ b/kernel/buf.h
@@ -1,5 +1,6 @@
 struct buf {
   int valid;   // has data been read from disk?
+  int disk;    // does disk "own" buf?
   uint dev;
   uint blockno;
   struct sleeplock lock;
-- 
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