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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2006-03-22 16:09:12 +08:00
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#ifndef _LINUX_MIGRATE_H
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#define _LINUX_MIGRATE_H
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#include <linux/mm.h>
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2007-05-07 05:50:20 +08:00
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#include <linux/mempolicy.h>
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2012-01-21 06:33:53 +08:00
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#include <linux/migrate_mode.h>
|
2017-07-11 06:48:47 +08:00
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#include <linux/hugetlb.h>
|
2006-03-22 16:09:12 +08:00
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|
2018-04-11 07:30:03 +08:00
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typedef struct page *new_page_t(struct page *page, unsigned long private);
|
2014-06-05 07:08:25 +08:00
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typedef void free_page_t(struct page *page, unsigned long private);
|
2006-06-23 17:03:53 +08:00
|
|
|
|
mm/migrate: introduce a standard migration target allocation function
There are some similar functions for migration target allocation. Since
there is no fundamental difference, it's better to keep just one rather
than keeping all variants. This patch implements base migration target
allocation function. In the following patches, variants will be converted
to use this function.
Changes should be mechanical, but, unfortunately, there are some
differences. First, some callers' nodemask is assgined to NULL since NULL
nodemask will be considered as all available nodes, that is,
&node_states[N_MEMORY]. Second, for hugetlb page allocation, gfp_mask is
redefined as regular hugetlb allocation gfp_mask plus __GFP_THISNODE if
user provided gfp_mask has it. This is because future caller of this
function requires to set this node constaint. Lastly, if provided nodeid
is NUMA_NO_NODE, nodeid is set up to the node where migration source
lives. It helps to remove simple wrappers for setting up the nodeid.
Note that PageHighmem() call in previous function is changed to open-code
"is_highmem_idx()" since it provides more readability.
[akpm@linux-foundation.org: tweak patch title, per Vlastimil]
[akpm@linux-foundation.org: fix typo in comment]
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Roman Gushchin <guro@fb.com>
Link: http://lkml.kernel.org/r/1594622517-20681-6-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-12 09:37:25 +08:00
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struct migration_target_control;
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2012-12-12 08:02:31 +08:00
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/*
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* Return values from addresss_space_operations.migratepage():
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* - negative errno on page migration failure;
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* - zero on page migration success;
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*/
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#define MIGRATEPAGE_SUCCESS 0
|
2014-10-10 06:29:27 +08:00
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2022-06-08 03:38:48 +08:00
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/**
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* struct movable_operations - Driver page migration
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* @isolate_page:
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* The VM calls this function to prepare the page to be moved. The page
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* is locked and the driver should not unlock it. The driver should
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* return ``true`` if the page is movable and ``false`` if it is not
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* currently movable. After this function returns, the VM uses the
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* page->lru field, so the driver must preserve any information which
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* is usually stored here.
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*
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* @migrate_page:
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* After isolation, the VM calls this function with the isolated
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* @src page. The driver should copy the contents of the
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* @src page to the @dst page and set up the fields of @dst page.
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* Both pages are locked.
|
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|
* If page migration is successful, the driver should call
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|
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* __ClearPageMovable(@src) and return MIGRATEPAGE_SUCCESS.
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* If the driver cannot migrate the page at the moment, it can return
|
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* -EAGAIN. The VM interprets this as a temporary migration failure and
|
|
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* will retry it later. Any other error value is a permanent migration
|
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* failure and migration will not be retried.
|
|
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* The driver shouldn't touch the @src->lru field while in the
|
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* migrate_page() function. It may write to @dst->lru.
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*
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* @putback_page:
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|
* If migration fails on the isolated page, the VM informs the driver
|
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* that the page is no longer a candidate for migration by calling
|
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* this function. The driver should put the isolated page back into
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|
* its own data structure.
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|
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*/
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struct movable_operations {
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bool (*isolate_page)(struct page *, isolate_mode_t);
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int (*migrate_page)(struct page *dst, struct page *src,
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enum migrate_mode);
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void (*putback_page)(struct page *);
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};
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|
2021-11-06 04:43:32 +08:00
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/* Defined in mm/debug.c: */
|
2018-12-28 16:35:59 +08:00
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extern const char *migrate_reason_names[MR_TYPES];
|
2016-03-16 05:56:18 +08:00
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|
2007-05-07 05:50:20 +08:00
|
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#ifdef CONFIG_MIGRATION
|
2009-01-07 06:39:16 +08:00
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|
2012-12-12 08:02:47 +08:00
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extern void putback_movable_pages(struct list_head *l);
|
2022-06-06 22:27:41 +08:00
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int migrate_folio(struct address_space *mapping, struct folio *dst,
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struct folio *src, enum migrate_mode mode);
|
2014-06-05 07:08:25 +08:00
|
|
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extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free,
|
2021-09-03 05:59:13 +08:00
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unsigned long private, enum migrate_mode mode, int reason,
|
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|
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unsigned int *ret_succeeded);
|
mm/migrate: introduce a standard migration target allocation function
There are some similar functions for migration target allocation. Since
there is no fundamental difference, it's better to keep just one rather
than keeping all variants. This patch implements base migration target
allocation function. In the following patches, variants will be converted
to use this function.
Changes should be mechanical, but, unfortunately, there are some
differences. First, some callers' nodemask is assgined to NULL since NULL
nodemask will be considered as all available nodes, that is,
&node_states[N_MEMORY]. Second, for hugetlb page allocation, gfp_mask is
redefined as regular hugetlb allocation gfp_mask plus __GFP_THISNODE if
user provided gfp_mask has it. This is because future caller of this
function requires to set this node constaint. Lastly, if provided nodeid
is NUMA_NO_NODE, nodeid is set up to the node where migration source
lives. It helps to remove simple wrappers for setting up the nodeid.
Note that PageHighmem() call in previous function is changed to open-code
"is_highmem_idx()" since it provides more readability.
[akpm@linux-foundation.org: tweak patch title, per Vlastimil]
[akpm@linux-foundation.org: fix typo in comment]
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Roman Gushchin <guro@fb.com>
Link: http://lkml.kernel.org/r/1594622517-20681-6-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-12 09:37:25 +08:00
|
|
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extern struct page *alloc_migration_target(struct page *page, unsigned long private);
|
2017-02-25 06:57:29 +08:00
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|
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extern int isolate_movable_page(struct page *page, isolate_mode_t mode);
|
2006-06-23 17:03:53 +08:00
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|
2022-06-06 22:47:21 +08:00
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int migrate_huge_page_move_mapping(struct address_space *mapping,
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struct folio *dst, struct folio *src);
|
2022-01-22 14:10:46 +08:00
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void migration_entry_wait_on_locked(swp_entry_t entry, pte_t *ptep,
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spinlock_t *ptl);
|
2021-05-08 03:26:29 +08:00
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void folio_migrate_flags(struct folio *newfolio, struct folio *folio);
|
2021-05-08 03:05:06 +08:00
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void folio_migrate_copy(struct folio *newfolio, struct folio *folio);
|
2021-05-07 19:28:40 +08:00
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int folio_migrate_mapping(struct address_space *mapping,
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struct folio *newfolio, struct folio *folio, int extra_count);
|
2021-11-06 04:43:35 +08:00
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2022-03-23 05:47:37 +08:00
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#else
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2012-12-12 08:02:47 +08:00
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static inline void putback_movable_pages(struct list_head *l) {}
|
2014-06-05 07:08:25 +08:00
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static inline int migrate_pages(struct list_head *l, new_page_t new,
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free_page_t free, unsigned long private, enum migrate_mode mode,
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2021-09-03 05:59:13 +08:00
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int reason, unsigned int *ret_succeeded)
|
2013-02-23 08:35:14 +08:00
|
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{ return -ENOSYS; }
|
mm/migrate: introduce a standard migration target allocation function
There are some similar functions for migration target allocation. Since
there is no fundamental difference, it's better to keep just one rather
than keeping all variants. This patch implements base migration target
allocation function. In the following patches, variants will be converted
to use this function.
Changes should be mechanical, but, unfortunately, there are some
differences. First, some callers' nodemask is assgined to NULL since NULL
nodemask will be considered as all available nodes, that is,
&node_states[N_MEMORY]. Second, for hugetlb page allocation, gfp_mask is
redefined as regular hugetlb allocation gfp_mask plus __GFP_THISNODE if
user provided gfp_mask has it. This is because future caller of this
function requires to set this node constaint. Lastly, if provided nodeid
is NUMA_NO_NODE, nodeid is set up to the node where migration source
lives. It helps to remove simple wrappers for setting up the nodeid.
Note that PageHighmem() call in previous function is changed to open-code
"is_highmem_idx()" since it provides more readability.
[akpm@linux-foundation.org: tweak patch title, per Vlastimil]
[akpm@linux-foundation.org: fix typo in comment]
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Roman Gushchin <guro@fb.com>
Link: http://lkml.kernel.org/r/1594622517-20681-6-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-12 09:37:25 +08:00
|
|
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static inline struct page *alloc_migration_target(struct page *page,
|
|
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unsigned long private)
|
2020-08-12 09:37:14 +08:00
|
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{ return NULL; }
|
2017-02-25 06:57:32 +08:00
|
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static inline int isolate_movable_page(struct page *page, isolate_mode_t mode)
|
|
|
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{ return -EBUSY; }
|
2006-03-31 18:29:56 +08:00
|
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|
2010-09-30 10:54:51 +08:00
|
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static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
|
2022-06-06 22:47:21 +08:00
|
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struct folio *dst, struct folio *src)
|
2010-09-08 09:19:35 +08:00
|
|
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{
|
|
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|
return -ENOSYS;
|
|
|
|
}
|
2021-11-06 04:43:35 +08:00
|
|
|
|
2006-03-22 16:09:12 +08:00
|
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#endif /* CONFIG_MIGRATION */
|
2012-10-25 20:16:34 +08:00
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2022-04-29 14:16:09 +08:00
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#if defined(CONFIG_MIGRATION) && defined(CONFIG_NUMA)
|
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extern void set_migration_target_nodes(void);
|
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extern void migrate_on_reclaim_init(void);
|
|
|
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extern bool numa_demotion_enabled;
|
|
|
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extern int next_demotion_node(int node);
|
|
|
|
#else
|
|
|
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static inline void set_migration_target_nodes(void) {}
|
|
|
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static inline void migrate_on_reclaim_init(void) {}
|
|
|
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static inline int next_demotion_node(int node)
|
|
|
|
{
|
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return NUMA_NO_NODE;
|
|
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}
|
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#define numa_demotion_enabled false
|
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#endif
|
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|
2016-07-27 06:26:50 +08:00
|
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#ifdef CONFIG_COMPACTION
|
2022-06-08 03:38:48 +08:00
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bool PageMovable(struct page *page);
|
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void __SetPageMovable(struct page *page, const struct movable_operations *ops);
|
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void __ClearPageMovable(struct page *page);
|
2016-07-27 06:26:50 +08:00
|
|
|
#else
|
2022-06-08 03:38:48 +08:00
|
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static inline bool PageMovable(struct page *page) { return false; }
|
2016-07-27 06:26:50 +08:00
|
|
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static inline void __SetPageMovable(struct page *page,
|
2022-06-08 03:38:48 +08:00
|
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const struct movable_operations *ops)
|
2016-07-27 06:26:50 +08:00
|
|
|
{
|
|
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|
}
|
|
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static inline void __ClearPageMovable(struct page *page)
|
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|
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{
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|
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}
|
|
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#endif
|
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|
2022-05-13 11:23:05 +08:00
|
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static inline bool folio_test_movable(struct folio *folio)
|
|
|
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{
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return PageMovable(&folio->page);
|
|
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}
|
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|
2022-06-08 03:38:48 +08:00
|
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static inline
|
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const struct movable_operations *page_movable_ops(struct page *page)
|
|
|
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{
|
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VM_BUG_ON(!__PageMovable(page));
|
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return (const struct movable_operations *)
|
|
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((unsigned long)page->mapping - PAGE_MAPPING_MOVABLE);
|
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}
|
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|
2012-10-25 20:16:34 +08:00
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#ifdef CONFIG_NUMA_BALANCING
|
2013-10-07 18:29:05 +08:00
|
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extern int migrate_misplaced_page(struct page *page,
|
|
|
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struct vm_area_struct *vma, int node);
|
2012-10-25 20:16:34 +08:00
|
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|
#else
|
2013-10-07 18:29:05 +08:00
|
|
|
static inline int migrate_misplaced_page(struct page *page,
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struct vm_area_struct *vma, int node)
|
2012-10-25 20:16:34 +08:00
|
|
|
{
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|
|
|
return -EAGAIN; /* can't migrate now */
|
|
|
|
}
|
2012-12-05 17:32:56 +08:00
|
|
|
#endif /* CONFIG_NUMA_BALANCING */
|
2012-11-19 20:35:47 +08:00
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2017-09-09 07:12:09 +08:00
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#ifdef CONFIG_MIGRATION
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2017-09-09 07:12:17 +08:00
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/*
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* Watch out for PAE architecture, which has an unsigned long, and might not
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* have enough bits to store all physical address and flags. So far we have
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* enough room for all our flags.
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*/
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2017-09-09 07:12:09 +08:00
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#define MIGRATE_PFN_VALID (1UL << 0)
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#define MIGRATE_PFN_MIGRATE (1UL << 1)
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#define MIGRATE_PFN_WRITE (1UL << 3)
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2017-09-09 07:12:17 +08:00
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#define MIGRATE_PFN_SHIFT 6
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2017-09-09 07:12:09 +08:00
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static inline struct page *migrate_pfn_to_page(unsigned long mpfn)
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{
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if (!(mpfn & MIGRATE_PFN_VALID))
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return NULL;
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return pfn_to_page(mpfn >> MIGRATE_PFN_SHIFT);
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}
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static inline unsigned long migrate_pfn(unsigned long pfn)
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{
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return (pfn << MIGRATE_PFN_SHIFT) | MIGRATE_PFN_VALID;
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}
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2020-07-24 06:30:00 +08:00
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enum migrate_vma_direction {
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MIGRATE_VMA_SELECT_SYSTEM = 1 << 0,
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MIGRATE_VMA_SELECT_DEVICE_PRIVATE = 1 << 1,
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2022-07-15 23:05:12 +08:00
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MIGRATE_VMA_SELECT_DEVICE_COHERENT = 1 << 2,
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2020-07-24 06:30:00 +08:00
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};
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2019-08-14 15:59:19 +08:00
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struct migrate_vma {
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struct vm_area_struct *vma;
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/*
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* Both src and dst array must be big enough for
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* (end - start) >> PAGE_SHIFT entries.
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*
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* The src array must not be modified by the caller after
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* migrate_vma_setup(), and must not change the dst array after
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* migrate_vma_pages() returns.
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*/
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unsigned long *dst;
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unsigned long *src;
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unsigned long cpages;
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unsigned long npages;
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unsigned long start;
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unsigned long end;
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2020-03-17 03:32:14 +08:00
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/*
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* Set to the owner value also stored in page->pgmap->owner for
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2020-07-24 06:30:00 +08:00
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* migrating out of device private memory. The flags also need to
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* be set to MIGRATE_VMA_SELECT_DEVICE_PRIVATE.
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2020-07-24 06:30:01 +08:00
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* The caller should always set this field when using mmu notifier
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* callbacks to avoid device MMU invalidations for device private
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* pages that are not being migrated.
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2020-03-17 03:32:14 +08:00
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*/
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2020-07-24 06:30:00 +08:00
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void *pgmap_owner;
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unsigned long flags;
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2017-09-09 07:12:09 +08:00
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};
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2019-08-14 15:59:19 +08:00
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int migrate_vma_setup(struct migrate_vma *args);
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void migrate_vma_pages(struct migrate_vma *migrate);
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void migrate_vma_finalize(struct migrate_vma *migrate);
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2017-09-09 07:12:09 +08:00
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#endif /* CONFIG_MIGRATION */
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2006-03-22 16:09:12 +08:00
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#endif /* _LINUX_MIGRATE_H */
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