btrfs: replace GPL boilerplate by SPDX -- headers

Remove GPL boilerplate text (long, short, one-line) and keep the rest,
ie. personal, company or original source copyright statements. Add the
SPDX header.

Unify the include protection macros to match the file names.

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 3 insertions, 16 deletions

diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index ce796557a918..cc605f7b23fb 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -1,23 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2008 Oracle.  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 v2 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 021110-1307, USA.
  */
 
-#ifndef __BTRFS_COMPRESSION_
-#define __BTRFS_COMPRESSION_
+#ifndef BTRFS_COMPRESSION_H
+#define BTRFS_COMPRESSION_H
 
 /*
  * We want to make sure that amount of RAM required to uncompress an extent is