tools: bpftool: Cleanup license mess

Precise and non-ambiguous license information is important. The recent
relicensing of the bpftools introduced a license conflict.

The files have now:

     SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause

and

     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License
     * as published by the Free Software Foundation; either version
     * 2 of the License, or (at your option) any later version

Amazingly about 20 people acked that change and neither they nor the
committer noticed. Oh well.

Digging deeper: The files were imported from the iproute2 repository with
the GPL V2 or later boiler plate text in commit b66e907cfee2 ("tools:
bpftool: copy JSON writer from iproute2 repository")

Looking at the iproute2 repository at

  git://git.kernel.org/pub/scm/network/iproute2/iproute2.git

the following commit is the equivivalent:

  commit d9d8c839 ("json_writer: add SPDX Identifier (GPL-2/BSD-2)")

That commit explicitly removes the boiler plate and relicenses the code
uner GPL-2.0-only and BSD-2-Clause. As Steven wrote the original code and
also the relicensing commit, it's assumed that the relicensing was intended
to do exaclty that. Just the kernel side update failed to remove the boiler
plate. Do so now.

Fixes: 907b22365115 ("tools: bpftool: dual license all files")
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: YueHaibing <[email protected]>
Cc: Yonghong Song <[email protected]>
Cc: Stanislav Fomichev <[email protected]>
Cc: Sean Young <[email protected]>
Cc: Jiri Benc <[email protected]>
Cc: David Calavera <[email protected]>
Cc: Andrey Ignatov <[email protected]>
Cc: Joe Stringer <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Petar Penkov <[email protected]>
Cc: Sandipan Das <[email protected]>
Cc: Prashant Bhole <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: John Fastabend <[email protected]>
Cc: Taeung Song <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Cc: Quentin Monnet <[email protected]>
CC: [email protected]
Cc: [email protected]
Acked-by: Jakub Kicinski <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>

2 files changed, 1 insertions, 11 deletions

diff --git a/tools/bpf/bpftool/json_writer.c b/tools/bpf/bpftool/json_writer.c
index bff7ee026680..6046dcab51cc 100644
--- a/tools/bpf/bpftool/json_writer.c
+++ b/tools/bpf/bpftool/json_writer.c
@@ -1,15 +1,10 @@
-// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
 /*
  * Simple streaming JSON writer
  *
  * This takes care of the annoying bits of JSON syntax like the commas
  * after elements
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
  * Authors:	Stephen Hemminger <[email protected]>
  */
 
diff --git a/tools/bpf/bpftool/json_writer.h b/tools/bpf/bpftool/json_writer.h
index c1ab51aed99c..cb9a1993681c 100644
--- a/tools/bpf/bpftool/json_writer.h
+++ b/tools/bpf/bpftool/json_writer.h
@@ -5,11 +5,6 @@
  * This takes care of the annoying bits of JSON syntax like the commas
  * after elements
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
  * Authors:	Stephen Hemminger <[email protected]>
  */