ext4: fix up remaining files with SPDX cleanups

A number of ext4 source files were skipped due because their copyright
permission statements didn't match the expected text used by the
automated conversion utilities.  I've added SPDX tags for the rest.

While looking at some of these files, I've noticed that we have quite
a bit of variation on the licenses that were used --- in particular
some of the Red Hat licenses on the jbd2 files use a GPL2+ license,
and we have some files that have a LGPL-2.1 license (which was quite
surprising).

I've not attempted to do any license changes.  Even if it is perfectly
legal to relicense to GPL 2.0-only for consistency's sake, that should
be done with ext4 developer community discussion.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/acl.h

-/* SPDX-License-Identifier: GPL-2.0 */
+// SPDX-License-Identifier: GPL-2.0
 /*
   File: fs/ext4/acl.h
 

fs/ext4/ext4.h

-/* SPDX-License-Identifier: GPL-2.0 */
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  ext4.h
  *

fs/ext4/ext4_extents.h

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
  * Written by Alex Tomas <alex@clusterfs.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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-
  */
 
 #ifndef _EXT4_EXTENTS

fs/ext4/ext4_jbd2.h

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * ext4_jbd2.h
  *
@@ -5,10 +6,6 @@
  *
  * Copyright 1998--1999 Red Hat corp --- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * Ext4-specific journaling extensions.
  */
 

fs/ext4/extents.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
  * Written by Alex Tomas <alex@clusterfs.com>
@@ -5,19 +6,6 @@
  * Architecture independence:
  *   Copyright (c) 2005, Bull S.A.
  *   Written by Pierre Peiffer <pierre.peiffer@bull.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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-
  */
 
 /*

fs/ext4/extents_status.h

-/* SPDX-License-Identifier: GPL-2.0 */
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  fs/ext4/extents_status.h
  *

fs/ext4/fsmap.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017 Oracle.  All Rights Reserved.
  *
  * Author: Darrick J. Wong <darrick.wong@oracle.com>
- *
- * 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 would 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 the Free Software Foundation,
- * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 #include "ext4.h"
 #include <linux/fsmap.h>

fs/ext4/fsmap.h

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017 Oracle.  All Rights Reserved.
  *
  * Author: Darrick J. Wong <darrick.wong@oracle.com>
- *
- * 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 would 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 the Free Software Foundation,
- * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 #ifndef __EXT4_FSMAP_H__
 #define	__EXT4_FSMAP_H__

fs/ext4/hash.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  linux/fs/ext4/hash.c
  *
  * Copyright (C) 2002 by Theodore Ts'o
- *
- * This file is released under the GPL v2.
- *
- * This file may be redistributed under the terms of the GNU Public
- * License.
  */
 
 #include <linux/fs.h>

fs/ext4/inline.c

+// SPDX-License-Identifier: LGPL-2.1
 /*
  * Copyright (c) 2012 Taobao.
  * Written by Tao Ma <boyu.mt@taobao.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * 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.
  */
 
 #include <linux/iomap.h>

fs/ext4/mballoc.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
  * Written by Alex Tomas <alex@clusterfs.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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-
  */
 
 

fs/ext4/mballoc.h

-/* SPDX-License-Identifier: GPL-2.0 */
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  fs/ext4/mballoc.h
  *

fs/ext4/migrate.c

+// SPDX-License-Identifier: LGPL-2.1
 /*
  * Copyright IBM Corporation, 2007
  * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
  */
 
 #include <linux/slab.h>

fs/ext4/move_extent.c

+// SPDX-License-Identifier: LGPL-2.1
 /*
  * Copyright (c) 2008,2009 NEC Software Tohoku, Ltd.
  * Written by Takashi Sato <t-sato@yk.jp.nec.com>
  *            Akira Fujita <a-fujita@rs.jp.nec.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * 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.
  */
 
 #include <linux/fs.h>

fs/ext4/super.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  linux/fs/ext4/super.c
  *

fs/ext4/truncate.h

-/* SPDX-License-Identifier: GPL-2.0 */
+// SPDX-License-Identifier: GPL-2.0
 /*
  * linux/fs/ext4/truncate.h
  *

fs/ext4/xattr.h

-/* SPDX-License-Identifier: GPL-2.0 */
+// SPDX-License-Identifier: GPL-2.0
 /*
   File: fs/ext4/xattr.h
 

fs/jbd2/checkpoint.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/fs/jbd2/checkpoint.c
  *
@@ -5,10 +6,6 @@
  *
  * Copyright 1999 Red Hat Software --- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * Checkpoint routines for the generic filesystem journaling code.
  * Part of the ext2fs journaling system.
  *

fs/jbd2/commit.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/fs/jbd2/commit.c
  *
@@ -5,10 +6,6 @@
  *
  * Copyright 1998 Red Hat corp --- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * Journal commit routines for the generic filesystem journaling code;
  * part of the ext2fs journaling system.
  */

fs/jbd2/journal.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/fs/jbd2/journal.c
  *
@@ -5,10 +6,6 @@
  *
  * Copyright 1998 Red Hat corp --- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * Generic filesystem journal-writing code; part of the ext2fs
  * journaling system.
  *

fs/jbd2/recovery.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/fs/jbd2/recovery.c
  *
@@ -5,10 +6,6 @@
  *
  * Copyright 1999-2000 Red Hat Software --- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * Journal recovery routines for the generic filesystem journaling code;
  * part of the ext2fs journaling system.
  */

fs/jbd2/revoke.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/fs/jbd2/revoke.c
  *
@@ -5,10 +6,6 @@
  *
  * Copyright 2000 Red Hat corp --- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * Journal revoke routines for the generic filesystem journaling code;
  * part of the ext2fs journaling system.
  *

fs/jbd2/transaction.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/fs/jbd2/transaction.c
  *
@@ -5,10 +6,6 @@
  *
  * Copyright 1998 Red Hat corp --- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * Generic filesystem transaction handling code; part of the ext2fs
  * journaling system.
  *