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/extent_map.h b/fs/btrfs/extent_map.h
index f6f8ba1..5fcb80a 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -1,6 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __EXTENTMAP__
-#define __EXTENTMAP__
+
+#ifndef BTRFS_EXTENT_MAP_H
+#define BTRFS_EXTENT_MAP_H
#include <linux/rbtree.h>
#include <linux/refcount.h>
@@ -93,4 +94,5 @@
u64 start, u64 len);
int btrfs_add_extent_mapping(struct extent_map_tree *em_tree,
struct extent_map **em_in, u64 start, u64 len);
+
#endif