1 files changed, 39 insertions, 0 deletions
diff --git a/libdiskfs/node-nrelel.c b/libdiskfs/node-nrelel.c
new file mode 100644
index 00000000..e61f6378
--- /dev/null
+++ b/libdiskfs/node-nrelel.c
@@ -0,0 +1,39 @@
+/* 
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   Written by Thomas Bushnell, BSG.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include "priv.h"
+
+/* Release a light reference on NP.  If NP is locked by anyone, then
+   this cannot be the last reference (because you must hold a
+   hard reference in order to hold the lock).  */
+void
+diskfs_nrele_light (struct node *np)
+{
+  spin_lock (&diskfs_node_refcnt_lock);
+  assert (np->light_references);
+  np->light_references--;
+  if (np->references + np->light_references == 0)
+    {
+      mutex_lock (&np->lock);
+      diskfs_drop_node (np);
+    }
+  else
+    spin_unlock (&diskfs_node_refcnt_lock);
+}