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>
diff --git a/fs/btrfs/rcu-string.h b/fs/btrfs/rcu-string.h
index 9e111e4..a97dc74 100644
--- a/fs/btrfs/rcu-string.h
+++ b/fs/btrfs/rcu-string.h
@@ -1,21 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2012 Red Hat. 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_RCU_STRING_H
+#define BTRFS_RCU_STRING_H
+
struct rcu_string {
struct rcu_head rcu;
char str[0];
@@ -54,3 +44,5 @@ static inline void rcu_string_free(struct rcu_string *str)
struct rcu_string *__str = rcu_dereference(rcu_str); \
__str->str; \
})
+
+#endif
