Index: head/sys/compat/linuxkpi/common/include/linux/lockdep.h
===================================================================
--- head/sys/compat/linuxkpi/common/include/linux/lockdep.h	(revision 320191)
+++ head/sys/compat/linuxkpi/common/include/linux/lockdep.h	(revision 320192)
@@ -1,41 +1,45 @@
 /*-
  * Copyright (c) 2010 Isilon Systems, Inc.
  * Copyright (c) 2010 iX Systems, Inc.
  * Copyright (c) 2010 Panasas, Inc.
  * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice unmodified, this list of conditions, and the following
  *    disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * $FreeBSD$
  */
-#ifndef	_LINUX_LOCKDEP_H_
+
+#ifndef _LINUX_LOCKDEP_H_
 #define	_LINUX_LOCKDEP_H_
 
 struct lock_class_key {
 };
 
-#define lockdep_set_class(lock, key)
+#define	lockdep_set_class(lock, key)
 
-#define lockdep_set_class_and_name(lock, key, name)
+#define	lockdep_set_class_and_name(lock, key, name)
 
-#endif  /* _LINUX_LOCKDEP_H_ */
+#define	lockdep_assert_held_once(m)			\
+	sx_assert(&(m)->sx, SA_XLOCKED | SA_NOTRECURSED)
+
+#endif /* _LINUX_LOCKDEP_H_ */