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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2011-11-01 07:55:58 +08:00
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# Hexagon configuration
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comment "Linux Kernel Configuration for Hexagon"
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config HEXAGON
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def_bool y
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32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option
All new 32-bit architectures should have 64-bit userspace off_t type, but
existing architectures has 32-bit ones.
To enforce the rule, new config option is added to arch/Kconfig that defaults
ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing
32-bit architectures enable it explicitly.
New option affects force_o_largefile() behaviour. Namely, if userspace
off_t is 64-bits long, we have no reason to reject user to open big files.
Note that even if architectures has only 64-bit off_t in the kernel
(arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32),
a libc may use 32-bit off_t, and therefore want to limit the file size
to 4GB unless specified differently in the open flags.
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Yury Norov <ynorov@marvell.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-05-16 16:18:49 +08:00
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select ARCH_32BIT_OFF_T
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2018-08-20 19:54:29 +08:00
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select ARCH_HAS_SYNC_DMA_FOR_DEVICE
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2018-07-31 19:39:32 +08:00
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select ARCH_NO_PREEMPT
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2021-06-23 22:11:21 +08:00
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select DMA_GLOBAL_POOL
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2011-11-01 07:55:58 +08:00
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# Other pending projects/to-do items.
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# select HAVE_REGS_AND_STACK_ACCESS_API
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# select HAVE_HW_BREAKPOINT if PERF_EVENTS
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# select ARCH_HAS_CPU_IDLE_WAIT
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2016-04-19 17:15:21 +08:00
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# select GPIOLIB
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2011-11-01 07:55:58 +08:00
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# select HAVE_CLK
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# select GENERIC_PENDING_IRQ if SMP
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select GENERIC_ATOMIC64
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select HAVE_PERF_EVENTS
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# GENERIC_ALLOCATOR is used by dma_alloc_coherent()
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select GENERIC_ALLOCATOR
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select GENERIC_IRQ_SHOW
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select HAVE_ARCH_KGDB
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select HAVE_ARCH_TRACEHOOK
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2018-04-05 15:44:52 +08:00
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select NEED_SG_DMA_LENGTH
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2014-04-08 06:39:19 +08:00
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select NO_IOPORT_MAP
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2011-11-24 20:54:28 +08:00
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select GENERIC_IOMAP
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2012-04-20 21:05:51 +08:00
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select GENERIC_SMP_IDLE_THREAD
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2011-11-16 06:31:48 +08:00
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select STACKTRACE_SUPPORT
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2012-05-19 00:45:47 +08:00
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select GENERIC_CLOCKEVENTS_BROADCAST
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2012-09-28 13:01:03 +08:00
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select MODULES_USE_ELF_RELA
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2012-04-04 07:15:42 +08:00
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select GENERIC_CPU_DEVICES
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2020-09-03 22:22:35 +08:00
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select SET_FS
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2021-07-08 09:07:44 +08:00
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select ARCH_WANT_LD_ORPHAN_WARN
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2021-07-31 13:22:32 +08:00
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select TRACE_IRQFLAGS_SUPPORT
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2020-06-14 00:50:22 +08:00
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help
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2011-11-01 07:55:58 +08:00
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Qualcomm Hexagon is a processor architecture designed for high
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performance and low power across a wide variety of applications.
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2013-03-23 05:05:40 +08:00
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config HEXAGON_PHYS_OFFSET
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def_bool y
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2020-06-14 00:50:22 +08:00
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help
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2013-03-23 05:05:40 +08:00
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Platforms that don't load the kernel at zero set this.
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2011-11-01 07:55:58 +08:00
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config FRAME_POINTER
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def_bool y
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config LOCKDEP_SUPPORT
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def_bool y
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config EARLY_PRINTK
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def_bool y
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config MMU
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def_bool y
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config GENERIC_CSUM
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def_bool y
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#
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# Use the generic interrupt handling code in kernel/irq/:
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#
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config GENERIC_IRQ_PROBE
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def_bool y
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config GENERIC_HWEIGHT
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def_bool y
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config STACKTRACE_SUPPORT
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def_bool y
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select STACKTRACE
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config GENERIC_BUG
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def_bool y
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depends on BUG
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menu "Machine selection"
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choice
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prompt "System type"
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2011-11-16 06:31:48 +08:00
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default HEXAGON_COMET
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2011-11-01 07:55:58 +08:00
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config HEXAGON_COMET
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bool "Comet Board"
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2020-06-14 00:50:22 +08:00
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help
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2011-11-01 07:55:58 +08:00
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Support for the Comet platform.
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endchoice
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2012-03-28 06:37:33 +08:00
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config HEXAGON_ARCH_VERSION
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int "Architecture version"
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default 2
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2011-11-01 07:55:58 +08:00
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config CMDLINE
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string "Default kernel command string"
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default ""
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help
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On some platforms, there is currently no way for the boot loader
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to pass arguments to the kernel. For these, you should supply some
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command-line options at build time by entering them here. At a
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minimum, you should specify the memory size and the root device
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(e.g., mem=64M root=/dev/nfs).
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config SMP
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bool "Multi-Processing support"
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2020-06-14 00:50:22 +08:00
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help
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2011-11-01 07:55:58 +08:00
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Enables SMP support in the kernel. If unsure, say "Y"
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config NR_CPUS
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int "Maximum number of CPUs" if SMP
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range 2 6 if SMP
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default "1" if !SMP
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default "6" if SMP
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2020-06-14 00:50:22 +08:00
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help
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2011-11-01 07:55:58 +08:00
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This allows you to specify the maximum number of CPUs which this
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kernel will support. The maximum supported value is 6 and the
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minimum value which makes sense is 2.
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This is purely to save memory - each supported CPU adds
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approximately eight kilobytes to the kernel image.
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choice
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prompt "Kernel page size"
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default PAGE_SIZE_4KB
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2020-06-14 00:50:22 +08:00
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help
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2011-11-01 07:55:58 +08:00
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Changes the default page size; use with caution.
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config PAGE_SIZE_4KB
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bool "4KB"
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config PAGE_SIZE_16KB
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bool "16KB"
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config PAGE_SIZE_64KB
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bool "64KB"
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config PAGE_SIZE_256KB
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bool "256KB"
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endchoice
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source "kernel/Kconfig.hz"
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endmenu
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