Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index 3e041b6..a7e44b2 100644
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -1,23 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * SN Platform GRU Driver
  *
  *            GRU DRIVER TABLES, MACROS, externs, etc
  *
  *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
- *
- *  This program 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 of the License, or
- *  (at your option) any later version.
- *
- *  This program 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  02111-1307 USA
  */
 
 #ifndef __GRUTABLES_H__
@@ -320,10 +307,8 @@
 
 struct gru_mm_struct {
 	struct mmu_notifier	ms_notifier;
-	atomic_t		ms_refcnt;
 	spinlock_t		ms_asid_lock;	/* protects ASID assignment */
 	atomic_t		ms_range_active;/* num range_invals active */
-	char			ms_released;
 	wait_queue_head_t	ms_wait_queue;
 	DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS);
 	struct gru_mm_tracker	ms_asids[GRU_MAX_GRUS];