Index: head/sys/ofed/include/linux/uaccess.h
===================================================================
--- head/sys/ofed/include/linux/uaccess.h	(revision 289592)
+++ head/sys/ofed/include/linux/uaccess.h	(revision 289593)
@@ -1,46 +1,55 @@
 /*-
  * Copyright (c) 2010 Isilon Systems, Inc.
  * Copyright (c) 2010 iX Systems, Inc.
  * Copyright (c) 2010 Panasas, Inc.
  * Copyright (c) 2013-2015 Mellanox Technologies, Ltd.
  * Copyright (c) 2015 François Tigeot
  * 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.
  */
 #ifndef	_LINUX_UACCESS_H_
 #define	_LINUX_UACCESS_H_
 
+#include <linux/compiler.h>
+
 #define	get_user(_x, _p)	-copyin((_p), &(_x), sizeof(*(_p)))
 #define	put_user(_x, _p)	-copyout(&(_x), (_p), sizeof(*(_p)))
 
-static inline void pagefault_disable(void)
+/*
+ * NOTE: The returned value from pagefault_disable() must be stored
+ * and passed to pagefault_enable(). Else possible recursion on the
+ * state can be lost.
+ */
+static inline int __must_check
+pagefault_disable(void)
 {
-	curthread_pflags_set(TDP_NOFAULTING | TDP_RESETSPUR);
+	return (vm_fault_disable_pagefaults());
 }
 
-static inline void pagefault_enable(void)
+static inline void
+pagefault_enable(int save)
 {
-	curthread_pflags_restore(~(TDP_NOFAULTING | TDP_RESETSPUR));
+	vm_fault_enable_pagefaults(save);
 }
 
 #endif	/* _LINUX_UACCESS_H_ */