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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2008-10-23 13:26:29 +08:00
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#ifndef _ASM_X86_HPET_H
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#define _ASM_X86_HPET_H
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2007-10-13 05:04:07 +08:00
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2008-09-06 09:02:17 +08:00
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#include <linux/msi.h>
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2007-10-13 05:04:07 +08:00
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#ifdef CONFIG_HPET_TIMER
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#define HPET_MMAP_SIZE 1024
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#define HPET_ID 0x000
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#define HPET_PERIOD 0x004
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#define HPET_CFG 0x010
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#define HPET_STATUS 0x020
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#define HPET_COUNTER 0x0f0
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2008-09-06 09:02:17 +08:00
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#define HPET_Tn_CFG(n) (0x100 + 0x20 * n)
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#define HPET_Tn_CMP(n) (0x108 + 0x20 * n)
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#define HPET_Tn_ROUTE(n) (0x110 + 0x20 * n)
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2007-10-13 05:04:07 +08:00
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#define HPET_T0_CFG 0x100
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#define HPET_T0_CMP 0x108
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#define HPET_T0_ROUTE 0x110
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#define HPET_T1_CFG 0x120
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#define HPET_T1_CMP 0x128
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#define HPET_T1_ROUTE 0x130
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#define HPET_T2_CFG 0x140
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#define HPET_T2_CMP 0x148
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#define HPET_T2_ROUTE 0x150
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#define HPET_ID_REV 0x000000ff
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#define HPET_ID_NUMBER 0x00001f00
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#define HPET_ID_64BIT 0x00002000
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#define HPET_ID_LEGSUP 0x00008000
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#define HPET_ID_VENDOR 0xffff0000
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#define HPET_ID_NUMBER_SHIFT 8
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#define HPET_ID_VENDOR_SHIFT 16
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#define HPET_CFG_ENABLE 0x001
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#define HPET_CFG_LEGACY 0x002
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#define HPET_LEGACY_8254 2
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#define HPET_LEGACY_RTC 8
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#define HPET_TN_LEVEL 0x0002
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#define HPET_TN_ENABLE 0x0004
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#define HPET_TN_PERIODIC 0x0008
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#define HPET_TN_PERIODIC_CAP 0x0010
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#define HPET_TN_64BIT_CAP 0x0020
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#define HPET_TN_SETVAL 0x0040
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#define HPET_TN_32BIT 0x0100
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#define HPET_TN_ROUTE 0x3e00
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#define HPET_TN_FSB 0x4000
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#define HPET_TN_FSB_CAP 0x8000
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#define HPET_TN_ROUTE_SHIFT 9
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/* Max HPET Period is 10^8 femto sec as in HPET spec */
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#define HPET_MAX_PERIOD 100000000UL
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/*
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* Min HPET period is 10^5 femto sec just for safety. If it is less than this,
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* then 32 bit HPET counter wrapsaround in less than 0.5 sec.
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*/
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#define HPET_MIN_PERIOD 100000UL
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/* hpet memory map physical address */
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extern unsigned long hpet_address;
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2007-10-13 05:04:23 +08:00
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extern unsigned long force_hpet_address;
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2015-10-19 18:35:44 +08:00
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extern bool boot_hpet_disable;
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2009-08-05 03:07:09 +08:00
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extern u8 hpet_blockid;
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2015-10-19 18:35:44 +08:00
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extern bool hpet_force_user;
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extern bool hpet_msi_disable;
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2007-10-13 05:04:07 +08:00
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extern int is_hpet_enabled(void);
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extern int hpet_enable(void);
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2007-12-04 00:17:10 +08:00
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extern void hpet_disable(void);
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2009-08-19 15:44:24 +08:00
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extern unsigned int hpet_readl(unsigned int a);
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2007-10-13 05:04:24 +08:00
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extern void force_hpet_resume(void);
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2007-10-13 05:04:07 +08:00
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#ifdef CONFIG_HPET_EMULATE_RTC
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#include <linux/interrupt.h>
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2008-01-30 20:33:28 +08:00
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typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie);
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2007-10-13 05:04:07 +08:00
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extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
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extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
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extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
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unsigned char sec);
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extern int hpet_set_periodic_freq(unsigned long freq);
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extern int hpet_rtc_dropped_irq(void);
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extern int hpet_rtc_timer_init(void);
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extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
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2008-01-30 20:33:28 +08:00
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extern int hpet_register_irq_handler(rtc_irq_handler handler);
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extern void hpet_unregister_irq_handler(rtc_irq_handler handler);
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2007-10-13 05:04:07 +08:00
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#endif /* CONFIG_HPET_EMULATE_RTC */
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2008-01-30 20:30:02 +08:00
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#else /* CONFIG_HPET_TIMER */
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2007-10-13 05:04:07 +08:00
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static inline int hpet_enable(void) { return 0; }
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2008-01-30 20:30:02 +08:00
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static inline int is_hpet_enabled(void) { return 0; }
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2008-07-02 02:43:24 +08:00
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#define hpet_readl(a) 0
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2012-09-26 18:44:37 +08:00
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#define default_setup_hpet_msi NULL
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2007-10-13 05:04:07 +08:00
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2008-01-30 20:30:02 +08:00
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#endif
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2008-10-23 13:26:29 +08:00
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#endif /* _ASM_X86_HPET_H */
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