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 f07a1e3a8c..f16982f8c0 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 2f51fc4e76..43aa5824bd 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 182dd9b41d..f01772c2f9 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 237c2d7ccc..b05be71aa2 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 7b3ca8af19..7eeb0d8395 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 e729e59ed1..41c77b0973 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 eb54d906b3..cd2ddf58e7 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 e19eee5985..8045687ba8 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 9acc238347..de0e802f46 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 431fd2dbf6..6fe9fb66f2 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 5836f2272d..2a778e2caf 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 8912732abe..17b93c10c8 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 265736d599..d6cc408d7f 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 4a5e0f8d72..ed3cde6165 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 7391c4628d..b5bd2c8406 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 888a4d3824..959e6e936a 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 0c9b17a975..2264374e33 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.