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b24413180f
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>
129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _METAG_PAGE_H
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#define _METAG_PAGE_H
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#include <linux/const.h>
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#include <asm/metag_mem.h>
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/* PAGE_SHIFT determines the page size */
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#if defined(CONFIG_PAGE_SIZE_4K)
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#define PAGE_SHIFT 12
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#elif defined(CONFIG_PAGE_SIZE_8K)
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#define PAGE_SHIFT 13
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#elif defined(CONFIG_PAGE_SIZE_16K)
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#define PAGE_SHIFT 14
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#endif
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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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#if defined(CONFIG_HUGETLB_PAGE_SIZE_8K)
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# define HPAGE_SHIFT 13
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_16K)
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# define HPAGE_SHIFT 14
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_32K)
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# define HPAGE_SHIFT 15
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
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# define HPAGE_SHIFT 16
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_128K)
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# define HPAGE_SHIFT 17
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
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# define HPAGE_SHIFT 18
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
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# define HPAGE_SHIFT 19
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1M)
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# define HPAGE_SHIFT 20
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_2M)
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# define HPAGE_SHIFT 21
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4M)
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# define HPAGE_SHIFT 22
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#endif
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#ifdef CONFIG_HUGETLB_PAGE
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# define HPAGE_SIZE (1UL << HPAGE_SHIFT)
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# define HPAGE_MASK (~(HPAGE_SIZE-1))
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# define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
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/*
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* We define our own hugetlb_get_unmapped_area so we don't corrupt 2nd level
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* page tables with normal pages in them.
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*/
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# define HUGEPT_SHIFT (22)
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# define HUGEPT_ALIGN (1 << HUGEPT_SHIFT)
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# define HUGEPT_MASK (HUGEPT_ALIGN - 1)
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# define ALIGN_HUGEPT(x) ALIGN(x, HUGEPT_ALIGN)
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# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
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#endif
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#ifndef __ASSEMBLY__
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/* On the Meta, we would like to know if the address (heap) we have is
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* in local or global space.
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*/
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#define is_global_space(addr) ((addr) > 0x7fffffff)
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#define is_local_space(addr) (!is_global_space(addr))
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extern void clear_page(void *to);
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extern void copy_page(void *to, void *from);
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#define clear_user_page(page, vaddr, pg) clear_page(page)
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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typedef struct page *pgtable_t;
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#define pte_val(x) ((x).pte)
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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 __pgd(x) ((pgd_t) { (x) })
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#define __pgprot(x) ((pgprot_t) { (x) })
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/* The kernel must now ALWAYS live at either 0xC0000000 or 0x40000000 - that
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* being either global or local space.
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*/
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#define PAGE_OFFSET (CONFIG_PAGE_OFFSET)
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#if PAGE_OFFSET >= LINGLOBAL_BASE
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#define META_MEMORY_BASE LINGLOBAL_BASE
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#define META_MEMORY_LIMIT LINGLOBAL_LIMIT
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#else
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#define META_MEMORY_BASE LINLOCAL_BASE
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#define META_MEMORY_LIMIT LINLOCAL_LIMIT
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#endif
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/* Offset between physical and virtual mapping of kernel memory. */
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extern unsigned int meta_memoffset;
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#define __pa(x) ((unsigned long)(((unsigned long)(x)) - meta_memoffset))
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#define __va(x) ((void *)((unsigned long)(((unsigned long)(x)) + meta_memoffset)))
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extern unsigned long pfn_base;
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#define ARCH_PFN_OFFSET (pfn_base)
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#ifdef CONFIG_FLATMEM
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extern unsigned long max_pfn;
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extern unsigned long min_low_pfn;
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#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_pfn)
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#endif
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/memory_model.h>
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#include <asm-generic/getorder.h>
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#endif /* __ASSMEBLY__ */
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#endif /* _METAG_PAGE_H */
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