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 01731557e69..9b3159296ff 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 b01b111bfb4..6f35854823e 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 4247cbbb097..27d78837c54 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 f171b242887..f90fbb29514 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 ce7330b1b77..b3b5ef7652e 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 b1b4498fba5..e5601b8f2bf 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 f2e7944e4ed..30791cd628f 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 c15fca34172..4da36a9bc77 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 39f4473ae5f..65c152a52fc 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 fd2e9b61279..ada3800f1e1 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 970563404fe..63b5bf0a860 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 feb91432e97..7263f41644e 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 cde3abd3dfb..52a8ceaf0c8 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 f785b600fac..991c2f68c3b 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 c405813b692..127b67fd1c8 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 54e0ab45463..06e54f33109 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 7e2528c4fb6..ad6641f3148 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"