License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2011-05-10 00:56:46 +08:00
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#ifndef BCMA_SCAN_H_
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#define BCMA_SCAN_H_
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#define BCMA_ADDR_BASE 0x18000000
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#define BCMA_WRAP_BASE 0x18100000
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#define SCAN_ER_VALID 0x00000001
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#define SCAN_ER_TAGX 0x00000006 /* we have to ignore 0x8 bit when checking tag for SCAN_ER_TAG_ADDR */
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#define SCAN_ER_TAG 0x0000000E
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#define SCAN_ER_TAG_CI 0x00000000
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#define SCAN_ER_TAG_MP 0x00000002
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#define SCAN_ER_TAG_ADDR 0x00000004
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#define SCAN_ER_TAG_END 0x0000000E
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#define SCAN_ER_BAD 0xFFFFFFFF
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#define SCAN_CIA_CLASS 0x000000F0
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#define SCAN_CIA_CLASS_SHIFT 4
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#define SCAN_CIA_ID 0x000FFF00
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#define SCAN_CIA_ID_SHIFT 8
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#define SCAN_CIA_MANUF 0xFFF00000
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#define SCAN_CIA_MANUF_SHIFT 20
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#define SCAN_CIB_NMP 0x000001F0
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#define SCAN_CIB_NMP_SHIFT 4
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#define SCAN_CIB_NSP 0x00003E00
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#define SCAN_CIB_NSP_SHIFT 9
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#define SCAN_CIB_NMW 0x0007C000
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#define SCAN_CIB_NMW_SHIFT 14
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#define SCAN_CIB_NSW 0x00F80000
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2012-07-11 14:37:23 +08:00
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#define SCAN_CIB_NSW_SHIFT 19
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2011-05-10 00:56:46 +08:00
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#define SCAN_CIB_REV 0xFF000000
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#define SCAN_CIB_REV_SHIFT 24
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#define SCAN_ADDR_AG32 0x00000008
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#define SCAN_ADDR_SZ 0x00000030
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#define SCAN_ADDR_SZ_SHIFT 4
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#define SCAN_ADDR_SZ_4K 0x00000000
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#define SCAN_ADDR_SZ_8K 0x00000010
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#define SCAN_ADDR_SZ_16K 0x00000020
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#define SCAN_ADDR_SZ_SZD 0x00000030
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#define SCAN_ADDR_TYPE 0x000000C0
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#define SCAN_ADDR_TYPE_SLAVE 0x00000000
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#define SCAN_ADDR_TYPE_BRIDGE 0x00000040
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#define SCAN_ADDR_TYPE_SWRAP 0x00000080
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#define SCAN_ADDR_TYPE_MWRAP 0x000000C0
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#define SCAN_ADDR_PORT 0x00000F00
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#define SCAN_ADDR_PORT_SHIFT 8
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#define SCAN_ADDR_ADDR 0xFFFFF000
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#define SCAN_ADDR_SZ_BASE 0x00001000 /* 4KB */
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#define SCAN_SIZE_SZ_ALIGN 0x00000FFF
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#define SCAN_SIZE_SZ 0xFFFFF000
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#define SCAN_SIZE_SG32 0x00000008
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#endif /* BCMA_SCAN_H_ */
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