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, 34 deletions

diff --git a/include/zfs/dmu.h b/include/zfs/dmu.h
index f07a1e3..f16982f 100644
--- a/include/zfs/dmu.h
+++ b/include/zfs/dmu.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/dmu_objset.h b/include/zfs/dmu_objset.h
index 2f51fc4..43aa582 100644
--- a/include/zfs/dmu_objset.h
+++ b/include/zfs/dmu_objset.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/dnode.h b/include/zfs/dnode.h
index 182dd9b..f01772c 100644
--- a/include/zfs/dnode.h
+++ b/include/zfs/dnode.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/dsl_dataset.h b/include/zfs/dsl_dataset.h
index 237c2d7..b05be71 100644
--- a/include/zfs/dsl_dataset.h
+++ b/include/zfs/dsl_dataset.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/dsl_dir.h b/include/zfs/dsl_dir.h
index 7b3ca8a..7eeb0d8 100644
--- a/include/zfs/dsl_dir.h
+++ b/include/zfs/dsl_dir.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/sa_impl.h b/include/zfs/sa_impl.h
index e729e59..41c77b0 100644
--- a/include/zfs/sa_impl.h
+++ b/include/zfs/sa_impl.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/spa.h b/include/zfs/spa.h
index eb54d90..cd2ddf5 100644
--- a/include/zfs/spa.h
+++ b/include/zfs/spa.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
diff --git a/include/zfs/uberblock_impl.h b/include/zfs/uberblock_impl.h
index e19eee5..8045687 100644
--- a/include/zfs/uberblock_impl.h
+++ b/include/zfs/uberblock_impl.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/vdev_impl.h b/include/zfs/vdev_impl.h
index 9acc238..de0e802 100644
--- a/include/zfs/vdev_impl.h
+++ b/include/zfs/vdev_impl.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/zap_impl.h b/include/zfs/zap_impl.h
index 431fd2d..6fe9fb6 100644
--- a/include/zfs/zap_impl.h
+++ b/include/zfs/zap_impl.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
diff --git a/include/zfs/zap_leaf.h b/include/zfs/zap_leaf.h
index 5836f22..2a778e2 100644
--- a/include/zfs/zap_leaf.h
+++ b/include/zfs/zap_leaf.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/zfs.h b/include/zfs/zfs.h
index 8912732..17b93c1 100644
--- a/include/zfs/zfs.h
+++ b/include/zfs/zfs.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
diff --git a/include/zfs/zfs_acl.h b/include/zfs/zfs_acl.h
index 265736d..d6cc408 100644
--- a/include/zfs/zfs_acl.h
+++ b/include/zfs/zfs_acl.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/zfs_znode.h b/include/zfs/zfs_znode.h
index 4a5e0f8..ed3cde6 100644
--- a/include/zfs/zfs_znode.h
+++ b/include/zfs/zfs_znode.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/zil.h b/include/zfs/zil.h
index 7391c46..b5bd2c8 100644
--- a/include/zfs/zil.h
+++ b/include/zfs/zil.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
diff --git a/include/zfs/zio.h b/include/zfs/zio.h
index 888a4d3..959e6e9 100644
--- a/include/zfs/zio.h
+++ b/include/zfs/zio.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
diff --git a/include/zfs/zio_checksum.h b/include/zfs/zio_checksum.h
index 0c9b17a..2264374 100644
--- a/include/zfs/zio_checksum.h
+++ b/include/zfs/zio_checksum.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.