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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2005-04-16 16:20:36 -06:00
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/*
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2006-12-06 21:38:59 -07:00
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* dz.h: Serial port driver for DECstations equipped
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* with the DZ chipset.
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*
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* Copyright (C) 1998 Olivier A. D. Lebaillif
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*
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* Email: olivier.lebaillif@ifrsys.com
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*
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2006-12-06 21:38:59 -07:00
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* Copyright (C) 2004, 2006 Maciej W. Rozycki
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*/
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#ifndef DZ_SERIAL_H
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#define DZ_SERIAL_H
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/*
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* Definitions for the Control and Status Register.
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*/
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#define DZ_TRDY 0x8000 /* Transmitter empty */
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#define DZ_TIE 0x4000 /* Transmitter Interrupt Enbl */
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#define DZ_TLINE 0x0300 /* Transmitter Line Number */
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#define DZ_RDONE 0x0080 /* Receiver data ready */
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#define DZ_RIE 0x0040 /* Receive Interrupt Enable */
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#define DZ_MSE 0x0020 /* Master Scan Enable */
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#define DZ_CLR 0x0010 /* Master reset */
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#define DZ_MAINT 0x0008 /* Loop Back Mode */
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/*
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* Definitions for the Receiver Buffer Register.
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*/
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#define DZ_RBUF_MASK 0x00FF /* Data Mask */
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#define DZ_LINE_MASK 0x0300 /* Line Mask */
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#define DZ_DVAL 0x8000 /* Valid Data indicator */
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#define DZ_OERR 0x4000 /* Overrun error indicator */
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#define DZ_FERR 0x2000 /* Frame error indicator */
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#define DZ_PERR 0x1000 /* Parity error indicator */
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2008-02-07 01:15:12 -07:00
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#define DZ_BREAK 0x0800 /* BREAK event software flag */
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2006-12-06 21:38:59 -07:00
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#define LINE(x) ((x & DZ_LINE_MASK) >> 8) /* Get the line number
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from the input buffer */
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#define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK))
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/*
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* Definitions for the Transmit Control Register.
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*/
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#define DZ_LINE_KEYBOARD 0x0001
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#define DZ_LINE_MOUSE 0x0002
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#define DZ_LINE_MODEM 0x0004
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#define DZ_LINE_PRINTER 0x0008
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#define DZ_MODEM_RTS 0x0800 /* RTS for the modem line (2) */
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#define DZ_MODEM_DTR 0x0400 /* DTR for the modem line (2) */
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#define DZ_PRINT_RTS 0x0200 /* RTS for the prntr line (3) */
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#define DZ_PRINT_DTR 0x0100 /* DTR for the prntr line (3) */
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#define DZ_LNENB 0x000f /* Transmitter Line Enable */
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/*
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* Definitions for the Modem Status Register.
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*/
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#define DZ_MODEM_RI 0x0800 /* RI for the modem line (2) */
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#define DZ_MODEM_CD 0x0400 /* CD for the modem line (2) */
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#define DZ_MODEM_DSR 0x0200 /* DSR for the modem line (2) */
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#define DZ_MODEM_CTS 0x0100 /* CTS for the modem line (2) */
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#define DZ_PRINT_RI 0x0008 /* RI for the printer line (3) */
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#define DZ_PRINT_CD 0x0004 /* CD for the printer line (3) */
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#define DZ_PRINT_DSR 0x0002 /* DSR for the prntr line (3) */
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#define DZ_PRINT_CTS 0x0001 /* CTS for the prntr line (3) */
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/*
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* Definitions for the Transmit Data Register.
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*/
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#define DZ_BRK0 0x0100 /* Break assertion for line 0 */
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#define DZ_BRK1 0x0200 /* Break assertion for line 1 */
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#define DZ_BRK2 0x0400 /* Break assertion for line 2 */
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#define DZ_BRK3 0x0800 /* Break assertion for line 3 */
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/*
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* Definitions for the Line Parameter Register.
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*/
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#define DZ_KEYBOARD 0x0000 /* line 0 = keyboard */
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#define DZ_MOUSE 0x0001 /* line 1 = mouse */
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#define DZ_MODEM 0x0002 /* line 2 = modem */
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#define DZ_PRINTER 0x0003 /* line 3 = printer */
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#define DZ_CSIZE 0x0018 /* Number of bits per byte (mask) */
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#define DZ_CS5 0x0000 /* 5 bits per byte */
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#define DZ_CS6 0x0008 /* 6 bits per byte */
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#define DZ_CS7 0x0010 /* 7 bits per byte */
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#define DZ_CS8 0x0018 /* 8 bits per byte */
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#define DZ_CSTOPB 0x0020 /* 2 stop bits instead of one */
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#define DZ_PARENB 0x0040 /* Parity enable */
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#define DZ_PARODD 0x0080 /* Odd parity instead of even */
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#define DZ_CBAUD 0x0E00 /* Baud Rate (mask) */
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#define DZ_B50 0x0000
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#define DZ_B75 0x0100
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#define DZ_B110 0x0200
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#define DZ_B134 0x0300
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#define DZ_B150 0x0400
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#define DZ_B300 0x0500
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#define DZ_B600 0x0600
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#define DZ_B1200 0x0700
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#define DZ_B1800 0x0800
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#define DZ_B2000 0x0900
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#define DZ_B2400 0x0A00
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#define DZ_B3600 0x0B00
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#define DZ_B4800 0x0C00
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#define DZ_B7200 0x0D00
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#define DZ_B9600 0x0E00
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2008-02-07 01:15:14 -07:00
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#define DZ_RXENAB 0x1000 /* Receiver Enable */
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2005-04-16 16:20:36 -06:00
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/*
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* Addresses for the DZ registers
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*/
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#define DZ_CSR 0x00 /* Control and Status Register */
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#define DZ_RBUF 0x08 /* Receive Buffer */
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#define DZ_LPR 0x08 /* Line Parameters Register */
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#define DZ_TCR 0x10 /* Transmitter Control Register */
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#define DZ_MSR 0x18 /* Modem Status Register */
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#define DZ_TDR 0x18 /* Transmit Data Register */
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#define DZ_NB_PORT 4
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#define DZ_XMIT_SIZE 4096 /* buffer size */
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#define DZ_WAKEUP_CHARS DZ_XMIT_SIZE/4
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#endif /* DZ_SERIAL_H */
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