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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2016-04-29 07:25:52 -06:00
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#ifndef _ASM_POWERPC_PGTABLE_RADIX_H
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#define _ASM_POWERPC_PGTABLE_RADIX_H
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2018-07-05 10:24:57 -06:00
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#include <asm/asm-const.h>
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2016-04-29 07:25:52 -06:00
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#ifndef __ASSEMBLY__
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#include <asm/cmpxchg.h>
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#endif
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#ifdef CONFIG_PPC_64K_PAGES
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#include <asm/book3s/64/radix-64k.h>
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#else
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#include <asm/book3s/64/radix-4k.h>
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#endif
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2016-08-24 03:33:38 -06:00
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#ifndef __ASSEMBLY__
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#include <asm/book3s/64/tlbflush-radix.h>
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#include <asm/cpu_has_feature.h>
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#endif
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2016-04-29 07:25:52 -06:00
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/* An empty PTE can still have a R or C writeback */
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#define RADIX_PTE_NONE_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
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/* Bits to set in a RPMD/RPUD/RPGD */
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#define RADIX_PMD_VAL_BITS (0x8000000000000000UL | RADIX_PTE_INDEX_SIZE)
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#define RADIX_PUD_VAL_BITS (0x8000000000000000UL | RADIX_PMD_INDEX_SIZE)
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#define RADIX_PGD_VAL_BITS (0x8000000000000000UL | RADIX_PUD_INDEX_SIZE)
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/* Don't have anything in the reserved bits and leaf bits */
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#define RADIX_PMD_BAD_BITS 0x60000000000000e0UL
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#define RADIX_PUD_BAD_BITS 0x60000000000000e0UL
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#define RADIX_PGD_BAD_BITS 0x60000000000000e0UL
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2018-08-12 23:44:57 -06:00
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#define RADIX_PMD_SHIFT (PAGE_SHIFT + RADIX_PTE_INDEX_SIZE)
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#define RADIX_PUD_SHIFT (RADIX_PMD_SHIFT + RADIX_PMD_INDEX_SIZE)
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#define RADIX_PGD_SHIFT (RADIX_PUD_SHIFT + RADIX_PUD_INDEX_SIZE)
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2016-04-29 07:25:52 -06:00
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/*
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* Size of EA range mapped by our pagetables.
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*/
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#define RADIX_PGTABLE_EADDR_SIZE (RADIX_PTE_INDEX_SIZE + RADIX_PMD_INDEX_SIZE + \
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RADIX_PUD_INDEX_SIZE + RADIX_PGD_INDEX_SIZE + PAGE_SHIFT)
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#define RADIX_PGTABLE_RANGE (ASM_CONST(1) << RADIX_PGTABLE_EADDR_SIZE)
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2016-04-29 07:26:21 -06:00
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/*
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* We support 52 bit address space, Use top bit for kernel
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* virtual mapping. Also make sure kernel fit in the top
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* quadrant.
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*
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* +------------------+
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* +------------------+ Kernel virtual map (0xc008000000000000)
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* | |
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* | |
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* | |
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* 0b11......+------------------+ Kernel linear map (0xc....)
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* | |
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* | 2 quadrant |
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* | |
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* 0b10......+------------------+
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* | |
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* | 1 quadrant |
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* | |
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* 0b01......+------------------+
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* | |
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* | 0 quadrant |
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* | |
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* 0b00......+------------------+
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*
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*
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* 3rd quadrant expanded:
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* +------------------------------+
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* | |
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* | |
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* | |
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2019-04-17 06:59:14 -06:00
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* +------------------------------+ Kernel vmemmap end (0xc010000000000000)
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2016-04-29 07:26:21 -06:00
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* | |
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2019-04-17 06:59:14 -06:00
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* | 512TB |
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2016-04-29 07:26:21 -06:00
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* | |
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2019-04-17 06:59:14 -06:00
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* +------------------------------+ Kernel IO map end/vmemap start
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2016-04-29 07:26:21 -06:00
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* | |
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2019-04-17 06:59:14 -06:00
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* | 512TB |
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2016-04-29 07:26:21 -06:00
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* | |
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2019-04-17 06:59:14 -06:00
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* +------------------------------+ Kernel vmap end/ IO map start
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2016-04-29 07:26:21 -06:00
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* | |
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2019-04-17 06:59:14 -06:00
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* | 512TB |
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2016-04-29 07:26:21 -06:00
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* | |
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* +------------------------------+ Kernel virt start (0xc008000000000000)
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* | |
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* | |
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* | |
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* +------------------------------+ Kernel linear (0xc.....)
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*/
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2019-04-17 06:59:14 -06:00
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#define RADIX_KERN_VIRT_START ASM_CONST(0xc008000000000000)
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2016-04-29 07:26:21 -06:00
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/*
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2019-04-17 06:59:14 -06:00
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* 49 = MAX_EA_BITS_PER_CONTEXT (hash specific). To make sure we pick
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* the same value as hash.
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2016-04-29 07:26:21 -06:00
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*/
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2019-04-17 06:59:14 -06:00
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#define RADIX_KERN_MAP_SIZE (1UL << 49)
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2016-04-29 07:26:21 -06:00
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#define RADIX_VMALLOC_START RADIX_KERN_VIRT_START
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2019-04-17 06:59:14 -06:00
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#define RADIX_VMALLOC_SIZE RADIX_KERN_MAP_SIZE
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2016-04-29 07:26:21 -06:00
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#define RADIX_VMALLOC_END (RADIX_VMALLOC_START + RADIX_VMALLOC_SIZE)
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2019-04-17 06:59:14 -06:00
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#define RADIX_KERN_IO_START RADIX_VMALLOC_END
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#define RADIX_KERN_IO_SIZE RADIX_KERN_MAP_SIZE
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#define RADIX_KERN_IO_END (RADIX_KERN_IO_START + RADIX_KERN_IO_SIZE)
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#define RADIX_VMEMMAP_START RADIX_KERN_IO_END
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#define RADIX_VMEMMAP_SIZE RADIX_KERN_MAP_SIZE
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#define RADIX_VMEMMAP_END (RADIX_VMEMMAP_START + RADIX_VMEMMAP_SIZE)
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2017-08-01 04:29:22 -06:00
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2016-04-29 07:25:52 -06:00
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#ifndef __ASSEMBLY__
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#define RADIX_PTE_TABLE_SIZE (sizeof(pte_t) << RADIX_PTE_INDEX_SIZE)
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#define RADIX_PMD_TABLE_SIZE (sizeof(pmd_t) << RADIX_PMD_INDEX_SIZE)
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#define RADIX_PUD_TABLE_SIZE (sizeof(pud_t) << RADIX_PUD_INDEX_SIZE)
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#define RADIX_PGD_TABLE_SIZE (sizeof(pgd_t) << RADIX_PGD_INDEX_SIZE)
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2017-06-28 11:04:08 -06:00
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#ifdef CONFIG_STRICT_KERNEL_RWX
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extern void radix__mark_rodata_ro(void);
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2017-07-14 00:51:23 -06:00
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extern void radix__mark_initmem_nx(void);
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2017-06-28 11:04:08 -06:00
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#endif
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2018-05-29 08:28:40 -06:00
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extern void radix__ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep,
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pte_t entry, unsigned long address,
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int psize);
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2018-05-29 08:28:39 -06:00
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2019-03-05 16:46:33 -07:00
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extern void radix__ptep_modify_prot_commit(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep,
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pte_t old_pte, pte_t pte);
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2016-08-24 03:33:38 -06:00
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static inline unsigned long __radix_pte_update(pte_t *ptep, unsigned long clr,
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unsigned long set)
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2016-04-29 07:25:52 -06:00
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{
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2018-06-01 04:01:20 -06:00
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__be64 old_be, tmp_be;
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__asm__ __volatile__(
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"1: ldarx %0,0,%3 # pte_update\n"
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" andc %1,%0,%5 \n"
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" or %1,%1,%4 \n"
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" stdcx. %1,0,%3 \n"
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" bne- 1b"
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: "=&r" (old_be), "=&r" (tmp_be), "=m" (*ptep)
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: "r" (ptep), "r" (cpu_to_be64(set)), "r" (cpu_to_be64(clr))
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: "cc" );
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return be64_to_cpu(old_be);
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2016-08-24 03:33:38 -06:00
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}
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static inline unsigned long radix__pte_update(struct mm_struct *mm,
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unsigned long addr,
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pte_t *ptep, unsigned long clr,
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unsigned long set,
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int huge)
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{
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unsigned long old_pte;
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2018-07-05 02:47:00 -06:00
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old_pte = __radix_pte_update(ptep, clr, set);
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2016-04-29 07:25:52 -06:00
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if (!huge)
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assert_pte_locked(mm, addr);
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return old_pte;
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}
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2017-02-08 19:58:20 -07:00
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static inline pte_t radix__ptep_get_and_clear_full(struct mm_struct *mm,
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unsigned long addr,
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pte_t *ptep, int full)
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{
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unsigned long old_pte;
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if (full) {
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2018-06-01 04:01:17 -06:00
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old_pte = pte_val(*ptep);
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*ptep = __pte(0);
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2017-02-08 19:58:20 -07:00
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} else
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old_pte = radix__pte_update(mm, addr, ptep, ~0ul, 0, 0);
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return __pte(old_pte);
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}
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2016-04-29 07:25:52 -06:00
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static inline int radix__pte_same(pte_t pte_a, pte_t pte_b)
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{
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return ((pte_raw(pte_a) ^ pte_raw(pte_b)) == 0);
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}
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static inline int radix__pte_none(pte_t pte)
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{
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return (pte_val(pte) & ~RADIX_PTE_NONE_MASK) == 0;
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}
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static inline void radix__set_pte_at(struct mm_struct *mm, unsigned long addr,
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pte_t *ptep, pte_t pte, int percpu)
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{
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*ptep = pte;
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2018-06-01 04:01:19 -06:00
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/*
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* The architecture suggests a ptesync after setting the pte, which
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* orders the store that updates the pte with subsequent page table
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* walk accesses which may load the pte. Without this it may be
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* possible for a subsequent access to result in spurious fault.
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*
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* This is not necessary for correctness, because a spurious fault
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* is tolerated by the page fault handler, and this store will
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* eventually be seen. In testing, there was no noticable increase
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* in user faults on POWER9. Avoiding ptesync here is a significant
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* win for things like fork. If a future microarchitecture benefits
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* from ptesync, it should probably go into update_mmu_cache, rather
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* than set_pte_at (which is used to set ptes unrelated to faults).
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*
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* Spurious faults to vmalloc region are not tolerated, so there is
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* a ptesync in flush_cache_vmap.
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*/
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2016-04-29 07:25:52 -06:00
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}
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static inline int radix__pmd_bad(pmd_t pmd)
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{
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return !!(pmd_val(pmd) & RADIX_PMD_BAD_BITS);
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}
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static inline int radix__pmd_same(pmd_t pmd_a, pmd_t pmd_b)
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{
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return ((pmd_raw(pmd_a) ^ pmd_raw(pmd_b)) == 0);
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}
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static inline int radix__pud_bad(pud_t pud)
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{
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return !!(pud_val(pud) & RADIX_PUD_BAD_BITS);
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}
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static inline int radix__pgd_bad(pgd_t pgd)
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{
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return !!(pgd_val(pgd) & RADIX_PGD_BAD_BITS);
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}
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2016-04-29 07:25:56 -06:00
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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static inline int radix__pmd_trans_huge(pmd_t pmd)
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{
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2017-06-27 19:32:34 -06:00
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return (pmd_val(pmd) & (_PAGE_PTE | _PAGE_DEVMAP)) == _PAGE_PTE;
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2016-04-29 07:25:56 -06:00
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}
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2016-04-29 07:26:30 -06:00
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static inline pmd_t radix__pmd_mkhuge(pmd_t pmd)
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|
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{
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|
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return __pmd(pmd_val(pmd) | _PAGE_PTE);
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|
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}
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extern unsigned long radix__pmd_hugepage_update(struct mm_struct *mm, unsigned long addr,
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pmd_t *pmdp, unsigned long clr,
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unsigned long set);
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extern pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma,
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|
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unsigned long address, pmd_t *pmdp);
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|
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extern void radix__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
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pgtable_t pgtable);
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extern pgtable_t radix__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
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extern pmd_t radix__pmdp_huge_get_and_clear(struct mm_struct *mm,
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|
|
|
unsigned long addr, pmd_t *pmdp);
|
2019-09-23 22:24:40 -06:00
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static inline int radix__has_transparent_hugepage(void)
|
|
|
|
{
|
|
|
|
/* For radix 2M at PMD level means thp */
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|
|
|
if (mmu_psize_defs[MMU_PAGE_2M].shift == PMD_SHIFT)
|
|
|
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return 1;
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|
|
return 0;
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|
|
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}
|
2016-04-29 07:25:56 -06:00
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|
#endif
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|
2016-04-29 07:26:00 -06:00
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|
extern int __meminit radix__vmemmap_create_mapping(unsigned long start,
|
|
|
|
unsigned long page_size,
|
|
|
|
unsigned long phys);
|
|
|
|
extern void radix__vmemmap_remove_mapping(unsigned long start,
|
|
|
|
unsigned long page_size);
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|
|
|
|
2016-04-29 07:25:58 -06:00
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|
extern int radix__map_kernel_page(unsigned long ea, unsigned long pa,
|
|
|
|
pgprot_t flags, unsigned int psz);
|
2016-06-17 00:10:36 -06:00
|
|
|
|
|
|
|
static inline unsigned long radix__get_tree_size(void)
|
|
|
|
{
|
|
|
|
unsigned long rts_field;
|
|
|
|
/*
|
2016-08-24 03:33:37 -06:00
|
|
|
* We support 52 bits, hence:
|
2018-07-05 02:47:00 -06:00
|
|
|
* bits 52 - 31 = 21, 0b10101
|
2016-06-17 00:10:36 -06:00
|
|
|
* RTS encoding details
|
|
|
|
* bits 0 - 3 of rts -> bits 6 - 8 unsigned long
|
|
|
|
* bits 4 - 5 of rts -> bits 62 - 63 of unsigned long
|
|
|
|
*/
|
2018-07-05 02:47:00 -06:00
|
|
|
rts_field = (0x5UL << 5); /* 6 - 8 bits */
|
|
|
|
rts_field |= (0x2UL << 61);
|
|
|
|
|
2016-06-17 00:10:36 -06:00
|
|
|
return rts_field;
|
|
|
|
}
|
2017-01-16 12:07:44 -07:00
|
|
|
|
|
|
|
#ifdef CONFIG_MEMORY_HOTPLUG
|
2018-02-13 08:08:22 -07:00
|
|
|
int radix__create_section_mapping(unsigned long start, unsigned long end, int nid);
|
2017-01-16 12:07:45 -07:00
|
|
|
int radix__remove_section_mapping(unsigned long start, unsigned long end);
|
2017-01-16 12:07:44 -07:00
|
|
|
#endif /* CONFIG_MEMORY_HOTPLUG */
|
2016-04-29 07:25:52 -06:00
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif
|