fix bug fix

ce72cadb · rsc · 13ae8808 · ce72cadb
--- a/fs.c
+++ b/fs.c
@@ -227,7 +227,7 @@ iunlock(struct inode *ip)
    panic("iunlock");

  acquire(&icache.lock);
-  ip->flags = 0;
+  ip->flags &= ~I_BUSY;
  wakeup(ip);
  release(&icache.lock);
 }
@@ -247,7 +247,7 @@ iput(struct inode *ip)
    ip->type = 0;
    iupdate(ip);
    acquire(&icache.lock);
-    ip->flags &= ~I_BUSY;
+    ip->flags = 0;
    wakeup(ip);
  }
  ip->ref--;