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 08:07:57 -06:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2015-05-24 09:11:34 -06:00
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/*
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* This header provides clock numbers for the ingenic,jz4780-cgu DT binding.
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*
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* They are roughly ordered as:
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* - external clocks
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* - PLLs
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* - muxes/dividers in the order they appear in the jz4780 programmers manual
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* - gates in order of their bit in the CLKGR* registers
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*/
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#ifndef __DT_BINDINGS_CLOCK_JZ4780_CGU_H__
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#define __DT_BINDINGS_CLOCK_JZ4780_CGU_H__
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#define JZ4780_CLK_EXCLK 0
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#define JZ4780_CLK_RTCLK 1
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#define JZ4780_CLK_APLL 2
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#define JZ4780_CLK_MPLL 3
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#define JZ4780_CLK_EPLL 4
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#define JZ4780_CLK_VPLL 5
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#define JZ4780_CLK_OTGPHY 6
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#define JZ4780_CLK_SCLKA 7
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#define JZ4780_CLK_CPUMUX 8
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#define JZ4780_CLK_CPU 9
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#define JZ4780_CLK_L2CACHE 10
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#define JZ4780_CLK_AHB0 11
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#define JZ4780_CLK_AHB2PMUX 12
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#define JZ4780_CLK_AHB2 13
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#define JZ4780_CLK_PCLK 14
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#define JZ4780_CLK_DDR 15
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#define JZ4780_CLK_VPU 16
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#define JZ4780_CLK_I2SPLL 17
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#define JZ4780_CLK_I2S 18
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#define JZ4780_CLK_LCD0PIXCLK 19
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#define JZ4780_CLK_LCD1PIXCLK 20
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#define JZ4780_CLK_MSCMUX 21
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#define JZ4780_CLK_MSC0 22
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#define JZ4780_CLK_MSC1 23
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#define JZ4780_CLK_MSC2 24
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#define JZ4780_CLK_UHC 25
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#define JZ4780_CLK_SSIPLL 26
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#define JZ4780_CLK_SSI 27
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#define JZ4780_CLK_CIMMCLK 28
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#define JZ4780_CLK_PCMPLL 29
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#define JZ4780_CLK_PCM 30
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#define JZ4780_CLK_GPU 31
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#define JZ4780_CLK_HDMI 32
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#define JZ4780_CLK_BCH 33
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#define JZ4780_CLK_NEMC 34
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#define JZ4780_CLK_OTG0 35
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#define JZ4780_CLK_SSI0 36
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#define JZ4780_CLK_SMB0 37
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#define JZ4780_CLK_SMB1 38
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#define JZ4780_CLK_SCC 39
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#define JZ4780_CLK_AIC 40
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#define JZ4780_CLK_TSSI0 41
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#define JZ4780_CLK_OWI 42
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#define JZ4780_CLK_KBC 43
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#define JZ4780_CLK_SADC 44
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#define JZ4780_CLK_UART0 45
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#define JZ4780_CLK_UART1 46
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#define JZ4780_CLK_UART2 47
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#define JZ4780_CLK_UART3 48
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#define JZ4780_CLK_SSI1 49
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#define JZ4780_CLK_SSI2 50
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#define JZ4780_CLK_PDMA 51
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#define JZ4780_CLK_GPS 52
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#define JZ4780_CLK_MAC 53
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#define JZ4780_CLK_SMB2 54
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#define JZ4780_CLK_CIM 55
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#define JZ4780_CLK_LCD 56
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#define JZ4780_CLK_TVE 57
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#define JZ4780_CLK_IPU 58
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#define JZ4780_CLK_DDR0 59
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#define JZ4780_CLK_DDR1 60
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#define JZ4780_CLK_SMB3 61
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#define JZ4780_CLK_TSSI1 62
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#define JZ4780_CLK_COMPRESS 63
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#define JZ4780_CLK_AIC1 64
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#define JZ4780_CLK_GPVLC 65
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#define JZ4780_CLK_OTG1 66
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#define JZ4780_CLK_UART4 67
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#define JZ4780_CLK_AHBMON 68
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#define JZ4780_CLK_SMB4 69
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#define JZ4780_CLK_DES 70
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#define JZ4780_CLK_X2D 71
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#define JZ4780_CLK_CORE1 72
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#endif /* __DT_BINDINGS_CLOCK_JZ4780_CGU_H__ */
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