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 14:07:57 +00:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2008-07-18 04:55:51 +00:00
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#ifndef _SPARC64_PAGE_H
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#define _SPARC64_PAGE_H
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#include <linux/const.h>
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#define PAGE_SHIFT 13
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#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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/* Flushing for D-cache alias handling is only needed if
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* the page size is smaller than 16K.
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*/
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#if PAGE_SHIFT < 14
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#define DCACHE_ALIASING_POSSIBLE
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#endif
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sparc64: Move from 4MB to 8MB huge pages.
The impetus for this is that we would like to move to 64-bit PMDs and
PGDs, but that would result in only supporting a 42-bit address space
with the current page table layout. It'd be nice to support at least
43-bits.
The reason we'd end up with only 42-bits after making PMDs and PGDs
64-bit is that we only use half-page sized PTE tables in order to make
PMDs line up to 4MB, the hardware huge page size we use.
So what we do here is we make huge pages 8MB, and fabricate them using
4MB hw TLB entries.
Facilitate this by providing a "REAL_HPAGE_SHIFT" which is used in
places that really need to operate on hardware 4MB pages.
Use full pages (512 entries) for PTE tables, and adjust PMD_SHIFT,
PGD_SHIFT, and the build time CPP test as needed. Use a CPP test to
make sure REAL_HPAGE_SHIFT and the _PAGE_SZHUGE_* we use match up.
This makes the pgtable cache completely unused, so remove the code
managing it and the state used in mm_context_t. Now we have less
spinlocks taken in the page table allocation path.
The technique we use to fabricate the 8MB pages is to transfer bit 22
from the missing virtual address into the PTEs physical address field.
That takes care of the transparent huge pages case.
For hugetlb, we fill things in at the PTE level and that code already
puts the sub huge page physical bits into the PTEs, based upon the
offset, so there is nothing special we need to do. It all just works
out.
So, a small amount of complexity in the THP case, but this code is
about to get much simpler when we move the 64-bit PMDs as we can move
away from the fancy 32-bit huge PMD encoding and just put a real PTE
value in there.
With bug fixes and help from Bob Picco.
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-25 20:48:49 +00:00
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#define HPAGE_SHIFT 23
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#define REAL_HPAGE_SHIFT 22
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2017-08-11 23:46:50 +00:00
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#define HPAGE_16GB_SHIFT 34
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2017-03-09 22:22:23 +00:00
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#define HPAGE_2GB_SHIFT 31
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2017-02-02 00:16:36 +00:00
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#define HPAGE_256MB_SHIFT 28
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2017-02-06 20:33:26 +00:00
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#define HPAGE_64K_SHIFT 16
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sparc64: Move from 4MB to 8MB huge pages.
The impetus for this is that we would like to move to 64-bit PMDs and
PGDs, but that would result in only supporting a 42-bit address space
with the current page table layout. It'd be nice to support at least
43-bits.
The reason we'd end up with only 42-bits after making PMDs and PGDs
64-bit is that we only use half-page sized PTE tables in order to make
PMDs line up to 4MB, the hardware huge page size we use.
So what we do here is we make huge pages 8MB, and fabricate them using
4MB hw TLB entries.
Facilitate this by providing a "REAL_HPAGE_SHIFT" which is used in
places that really need to operate on hardware 4MB pages.
Use full pages (512 entries) for PTE tables, and adjust PMD_SHIFT,
PGD_SHIFT, and the build time CPP test as needed. Use a CPP test to
make sure REAL_HPAGE_SHIFT and the _PAGE_SZHUGE_* we use match up.
This makes the pgtable cache completely unused, so remove the code
managing it and the state used in mm_context_t. Now we have less
spinlocks taken in the page table allocation path.
The technique we use to fabricate the 8MB pages is to transfer bit 22
from the missing virtual address into the PTEs physical address field.
That takes care of the transparent huge pages case.
For hugetlb, we fill things in at the PTE level and that code already
puts the sub huge page physical bits into the PTEs, based upon the
offset, so there is nothing special we need to do. It all just works
out.
So, a small amount of complexity in the THP case, but this code is
about to get much simpler when we move the 64-bit PMDs as we can move
away from the fancy 32-bit huge PMD encoding and just put a real PTE
value in there.
With bug fixes and help from Bob Picco.
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-25 20:48:49 +00:00
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#define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT)
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2008-07-18 04:55:51 +00:00
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2012-10-08 23:34:29 +00:00
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#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
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2008-07-18 04:55:51 +00:00
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#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
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#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
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#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
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2016-08-31 20:48:19 +00:00
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#define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
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2017-08-11 23:46:50 +00:00
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#define HUGE_MAX_HSTATE 5
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2008-07-18 04:55:51 +00:00
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#endif
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#ifndef __ASSEMBLY__
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2012-10-08 23:34:29 +00:00
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#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
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2013-02-20 06:34:10 +00:00
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struct pt_regs;
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2014-05-16 21:25:50 +00:00
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void hugetlb_setup(struct pt_regs *regs);
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2012-10-08 23:34:29 +00:00
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#endif
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2008-09-12 06:36:32 +00:00
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#define WANT_PAGE_VIRTUAL
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2014-05-16 21:25:50 +00:00
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void _clear_page(void *page);
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2008-07-18 04:55:51 +00:00
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#define clear_page(X) _clear_page((void *)(X))
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struct page;
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2014-05-16 21:25:50 +00:00
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void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
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2008-07-18 04:55:51 +00:00
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#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
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2014-05-16 21:25:50 +00:00
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void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
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2018-02-23 22:46:41 +00:00
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#define __HAVE_ARCH_COPY_USER_HIGHPAGE
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struct vm_area_struct;
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void copy_user_highpage(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma);
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#define __HAVE_ARCH_COPY_HIGHPAGE
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void copy_highpage(struct page *to, struct page *from);
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2008-07-18 04:55:51 +00:00
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/* Unlike sparc32, sparc64's parameter passing API is more
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* sane in that structures which as small enough are passed
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* in registers instead of on the stack. Thus, setting
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* STRICT_MM_TYPECHECKS does not generate worse code so
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* let's enable it to get the type checking.
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*/
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#define STRICT_MM_TYPECHECKS
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#ifdef STRICT_MM_TYPECHECKS
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/* These are used to make use of C type-checking.. */
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long iopte; } iopte_t;
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2013-09-25 21:33:16 +00:00
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typedef struct { unsigned long pmd; } pmd_t;
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2014-09-27 04:19:46 +00:00
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typedef struct { unsigned long pud; } pud_t;
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2013-09-25 21:33:16 +00:00
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typedef struct { unsigned long pgd; } pgd_t;
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2008-07-18 04:55:51 +00:00
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define pte_val(x) ((x).pte)
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#define iopte_val(x) ((x).iopte)
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#define pmd_val(x) ((x).pmd)
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2014-09-27 04:19:46 +00:00
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#define pud_val(x) ((x).pud)
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2008-07-18 04:55:51 +00:00
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) } )
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#define __iopte(x) ((iopte_t) { (x) } )
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#define __pmd(x) ((pmd_t) { (x) } )
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2014-09-27 04:19:46 +00:00
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#define __pud(x) ((pud_t) { (x) } )
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2008-07-18 04:55:51 +00:00
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#define __pgd(x) ((pgd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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#else
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/* .. while these make it easier on the compiler */
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typedef unsigned long pte_t;
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typedef unsigned long iopte_t;
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2013-09-25 21:33:16 +00:00
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typedef unsigned long pmd_t;
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2014-09-27 04:19:46 +00:00
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typedef unsigned long pud_t;
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2013-09-25 21:33:16 +00:00
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typedef unsigned long pgd_t;
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2008-07-18 04:55:51 +00:00
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typedef unsigned long pgprot_t;
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#define pte_val(x) (x)
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#define iopte_val(x) (x)
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#define pmd_val(x) (x)
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2014-09-27 04:19:46 +00:00
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#define pud_val(x) (x)
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2008-07-18 04:55:51 +00:00
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#define pgd_val(x) (x)
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#define pgprot_val(x) (x)
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#define __pte(x) (x)
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#define __iopte(x) (x)
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#define __pmd(x) (x)
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2014-09-27 04:19:46 +00:00
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#define __pud(x) (x)
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2008-07-18 04:55:51 +00:00
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#define __pgd(x) (x)
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#define __pgprot(x) (x)
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#endif /* (STRICT_MM_TYPECHECKS) */
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2012-10-08 23:34:22 +00:00
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typedef pte_t *pgtable_t;
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2008-07-18 04:55:51 +00:00
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2014-09-27 04:58:33 +00:00
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extern unsigned long sparc64_va_hole_top;
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extern unsigned long sparc64_va_hole_bottom;
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2013-09-18 18:58:32 +00:00
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2013-09-25 21:33:16 +00:00
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/* The next two defines specify the actual exclusion region we
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* enforce, wherein we use a 4GB red zone on each side of the VA hole.
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*/
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2014-09-27 04:58:33 +00:00
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#define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
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#define VA_EXCLUDE_END (sparc64_va_hole_top + (1UL << 32UL))
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2013-09-18 18:58:32 +00:00
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2008-07-18 04:55:51 +00:00
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#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
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2013-09-18 18:58:32 +00:00
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_AC(0x0000000070000000,UL) : \
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VA_EXCLUDE_END)
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2008-07-18 04:55:51 +00:00
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#include <asm-generic/memory_model.h>
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2013-09-21 04:50:41 +00:00
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extern unsigned long PAGE_OFFSET;
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2008-07-18 04:55:51 +00:00
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2013-09-21 04:50:41 +00:00
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#endif /* !(__ASSEMBLY__) */
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2013-09-18 22:39:06 +00:00
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2014-09-25 04:49:29 +00:00
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/* The maximum number of physical memory address bits we support. The
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* largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
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* evaluates to.
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2013-09-18 22:39:06 +00:00
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*/
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2014-09-25 04:49:29 +00:00
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#define MAX_PHYS_ADDRESS_BITS 53
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2013-09-18 22:39:06 +00:00
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#define ILOG2_4MB 22
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#define ILOG2_256MB 28
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2008-07-18 04:55:51 +00:00
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#ifndef __ASSEMBLY__
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#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
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#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define virt_to_phys __pa
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#define phys_to_virt __va
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#endif /* !(__ASSEMBLY__) */
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2009-05-13 22:56:30 +00:00
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#include <asm-generic/getorder.h>
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2008-07-18 04:55:51 +00:00
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#endif /* _SPARC64_PAGE_H */
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