SPDX: Convert all of our single license tags to Linux Kernel style

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>

17 files changed, 17 insertions, 35 deletions

diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index 01731557e6..9b3159296f 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y := btrfs.o chunk-map.o compression.o ctree.o dev.o dir-item.o \
 	extent-io.o hash.o inode.o root.o subvolume.o super.o
diff --git a/fs/btrfs/btrfs.c b/fs/btrfs/btrfs.c
index b01b111bfb..6f35854823 100644
--- a/fs/btrfs/btrfs.c
+++ b/fs/btrfs/btrfs.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/btrfs.h b/fs/btrfs/btrfs.h
index 4247cbbb09..27d78837c5 100644
--- a/fs/btrfs/btrfs.h
+++ b/fs/btrfs/btrfs.h
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __BTRFS_BTRFS_H__
diff --git a/fs/btrfs/btrfs_tree.h b/fs/btrfs/btrfs_tree.h
index f171b24288..f90fbb2951 100644
--- a/fs/btrfs/btrfs_tree.h
+++ b/fs/btrfs/btrfs_tree.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * From linux/include/uapi/linux/btrfs_tree.h
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __BTRFS_BTRFS_TREE_H__
diff --git a/fs/btrfs/chunk-map.c b/fs/btrfs/chunk-map.c
index ce7330b1b7..b3b5ef7652 100644
--- a/fs/btrfs/chunk-map.c
+++ b/fs/btrfs/chunk-map.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index b1b4498fba..e5601b8f2b 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/conv-funcs.h b/fs/btrfs/conv-funcs.h
index f2e7944e4e..30791cd628 100644
--- a/fs/btrfs/conv-funcs.h
+++ b/fs/btrfs/conv-funcs.h
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Functions to convert BTRFS structures from disk to CPU endianness and back.
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __BTRFS_CONV_FUNCS_H__
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index c15fca3417..4da36a9bc7 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 39f4473ae5..65c152a52f 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * From linux/fs/btrfs/ctree.h
  *   Copyright (C) 2007,2008 Oracle.  All rights reserved.
  *
  * Modified in 2017 by Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __BTRFS_CTREE_H__
diff --git a/fs/btrfs/dev.c b/fs/btrfs/dev.c
index fd2e9b6127..ada3800f1e 100644
--- a/fs/btrfs/dev.c
+++ b/fs/btrfs/dev.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 970563404f..63b5bf0a86 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/extent-io.c b/fs/btrfs/extent-io.c
index feb91432e9..7263f41644 100644
--- a/fs/btrfs/extent-io.c
+++ b/fs/btrfs/extent-io.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/hash.c b/fs/btrfs/hash.c
index cde3abd3df..52a8ceaf0c 100644
--- a/fs/btrfs/hash.c
+++ b/fs/btrfs/hash.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index f785b600fa..991c2f68c3 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/root.c b/fs/btrfs/root.c
index c405813b69..127b67fd1c 100644
--- a/fs/btrfs/root.c
+++ b/fs/btrfs/root.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/subvolume.c b/fs/btrfs/subvolume.c
index 54e0ab4546..06e54f3310 100644
--- a/fs/btrfs/subvolume.c
+++ b/fs/btrfs/subvolume.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 7e2528c4fb..ad6641f314 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * BTRFS filesystem implementation for U-Boot
  *
  * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "btrfs.h"