diff --git a/sys/compat/linuxkpi/common/include/linux/hardirq.h b/sys/compat/linuxkpi/common/include/linux/hardirq.h
index 07f00f076860..9e7baec1b213 100644
--- a/sys/compat/linuxkpi/common/include/linux/hardirq.h
+++ b/sys/compat/linuxkpi/common/include/linux/hardirq.h
@@ -1,43 +1,53 @@
 /*-
  * Copyright (c) 2010 Isilon Systems, Inc.
  * Copyright (c) 2010 iX Systems, Inc.
  * Copyright (c) 2010 Panasas, Inc.
  * Copyright (c) 2013 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 _LINUXKPI_LINUX_HARDIRQ_H_
 #define	_LINUXKPI_LINUX_HARDIRQ_H_
 
 #include <linux/types.h>
 #include <linux/lockdep.h>
 
 #include <sys/param.h>
 #include <sys/bus.h>
 #include <sys/interrupt.h>
 
 #define	synchronize_irq(irq)	_intr_drain((irq))
 
+/*
+ * FIXME: In the i915 driver's `intel_engine_cs.c` file,
+ * `synchronize_hardirq()` was replaced by `synchronize_rcu()` with the
+ * following comment:
+ *   "Is it enough to wait that all cpu have context-switched?"
+ *
+ * See commit f6d50b7af554e21c380486d6f41c8537b265c777 in drm-kmod.
+ */
+#define	synchronize_hardirq(irq) _intr_drain((irq))
+
 #endif	/* _LINUXKPI_LINUX_HARDIRQ_H_ */