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https://github.com/torvalds/linux
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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>
328 lines
8.1 KiB
C
328 lines
8.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_IO_H
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#define _ASM_IO_H
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#include <linux/types.h>
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#include <asm/pgtable.h>
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#define virt_to_phys(a) ((unsigned long)__pa(a))
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#define phys_to_virt(a) __va(a)
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#define virt_to_bus virt_to_phys
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#define bus_to_virt phys_to_virt
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static inline unsigned long isa_bus_to_virt(unsigned long addr) {
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BUG();
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return 0;
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}
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static inline unsigned long isa_virt_to_bus(void *addr) {
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BUG();
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return 0;
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}
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/*
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* Memory mapped I/O
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*
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* readX()/writeX() do byteswapping and take an ioremapped address
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* __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
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* gsc_*() don't byteswap and operate on physical addresses;
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* eg dev->hpa or 0xfee00000.
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*/
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static inline unsigned char gsc_readb(unsigned long addr)
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{
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long flags;
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unsigned char ret;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" ldbx 0(%2),%1\n"
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" mtsm %0\n"
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: "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
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return ret;
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}
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static inline unsigned short gsc_readw(unsigned long addr)
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{
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long flags;
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unsigned short ret;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" ldhx 0(%2),%1\n"
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" mtsm %0\n"
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: "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
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return ret;
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}
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static inline unsigned int gsc_readl(unsigned long addr)
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{
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u32 ret;
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__asm__ __volatile__(
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" ldwax 0(%1),%0\n"
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: "=r" (ret) : "r" (addr) );
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return ret;
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}
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static inline unsigned long long gsc_readq(unsigned long addr)
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{
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unsigned long long ret;
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#ifdef CONFIG_64BIT
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__asm__ __volatile__(
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" ldda 0(%1),%0\n"
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: "=r" (ret) : "r" (addr) );
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#else
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/* two reads may have side effects.. */
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ret = ((u64) gsc_readl(addr)) << 32;
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ret |= gsc_readl(addr+4);
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#endif
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return ret;
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}
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static inline void gsc_writeb(unsigned char val, unsigned long addr)
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{
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long flags;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" stbs %1,0(%2)\n"
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" mtsm %0\n"
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: "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
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}
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static inline void gsc_writew(unsigned short val, unsigned long addr)
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{
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long flags;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" sths %1,0(%2)\n"
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" mtsm %0\n"
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: "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
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}
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static inline void gsc_writel(unsigned int val, unsigned long addr)
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{
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__asm__ __volatile__(
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" stwas %0,0(%1)\n"
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: : "r" (val), "r" (addr) );
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}
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static inline void gsc_writeq(unsigned long long val, unsigned long addr)
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{
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#ifdef CONFIG_64BIT
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__asm__ __volatile__(
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" stda %0,0(%1)\n"
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: : "r" (val), "r" (addr) );
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#else
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/* two writes may have side effects.. */
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gsc_writel(val >> 32, addr);
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gsc_writel(val, addr+4);
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#endif
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}
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/*
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* The standard PCI ioremap interfaces
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*/
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extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
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/* Most machines react poorly to I/O-space being cacheable... Instead let's
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* define ioremap() in terms of ioremap_nocache().
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*/
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static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
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{
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return __ioremap(offset, size, _PAGE_NO_CACHE);
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}
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#define ioremap_nocache(off, sz) ioremap((off), (sz))
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#define ioremap_wc ioremap_nocache
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#define ioremap_uc ioremap_nocache
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extern void iounmap(const volatile void __iomem *addr);
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static inline unsigned char __raw_readb(const volatile void __iomem *addr)
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{
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return (*(volatile unsigned char __force *) (addr));
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}
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static inline unsigned short __raw_readw(const volatile void __iomem *addr)
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{
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return *(volatile unsigned short __force *) addr;
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}
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static inline unsigned int __raw_readl(const volatile void __iomem *addr)
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{
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return *(volatile unsigned int __force *) addr;
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}
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static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
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{
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return *(volatile unsigned long long __force *) addr;
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}
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static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
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{
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*(volatile unsigned char __force *) addr = b;
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}
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static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
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{
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*(volatile unsigned short __force *) addr = b;
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}
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static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
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{
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*(volatile unsigned int __force *) addr = b;
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}
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static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
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{
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*(volatile unsigned long long __force *) addr = b;
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}
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static inline unsigned char readb(const volatile void __iomem *addr)
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{
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return __raw_readb(addr);
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}
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static inline unsigned short readw(const volatile void __iomem *addr)
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{
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return le16_to_cpu(__raw_readw(addr));
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}
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static inline unsigned int readl(const volatile void __iomem *addr)
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{
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return le32_to_cpu(__raw_readl(addr));
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}
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static inline unsigned long long readq(const volatile void __iomem *addr)
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{
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return le64_to_cpu(__raw_readq(addr));
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}
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static inline void writeb(unsigned char b, volatile void __iomem *addr)
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{
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__raw_writeb(b, addr);
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}
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static inline void writew(unsigned short w, volatile void __iomem *addr)
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{
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__raw_writew(cpu_to_le16(w), addr);
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}
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static inline void writel(unsigned int l, volatile void __iomem *addr)
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{
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__raw_writel(cpu_to_le32(l), addr);
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}
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static inline void writeq(unsigned long long q, volatile void __iomem *addr)
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{
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__raw_writeq(cpu_to_le64(q), addr);
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}
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#define readb readb
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#define readw readw
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#define readl readl
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#define readq readq
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#define writeb writeb
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#define writew writew
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#define writel writel
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#define writeq writeq
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#define readb_relaxed(addr) readb(addr)
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#define readw_relaxed(addr) readw(addr)
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#define readl_relaxed(addr) readl(addr)
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#define readq_relaxed(addr) readq(addr)
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#define writeb_relaxed(b, addr) writeb(b, addr)
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#define writew_relaxed(w, addr) writew(w, addr)
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#define writel_relaxed(l, addr) writel(l, addr)
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#define writeq_relaxed(q, addr) writeq(q, addr)
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#define mmiowb() do { } while (0)
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void memset_io(volatile void __iomem *addr, unsigned char val, int count);
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void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
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void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
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/* Port-space IO */
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#define inb_p inb
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#define inw_p inw
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#define inl_p inl
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#define outb_p outb
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#define outw_p outw
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#define outl_p outl
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extern unsigned char eisa_in8(unsigned short port);
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extern unsigned short eisa_in16(unsigned short port);
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extern unsigned int eisa_in32(unsigned short port);
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extern void eisa_out8(unsigned char data, unsigned short port);
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extern void eisa_out16(unsigned short data, unsigned short port);
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extern void eisa_out32(unsigned int data, unsigned short port);
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#if defined(CONFIG_PCI)
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extern unsigned char inb(int addr);
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extern unsigned short inw(int addr);
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extern unsigned int inl(int addr);
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extern void outb(unsigned char b, int addr);
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extern void outw(unsigned short b, int addr);
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extern void outl(unsigned int b, int addr);
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#elif defined(CONFIG_EISA)
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#define inb eisa_in8
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#define inw eisa_in16
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#define inl eisa_in32
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#define outb eisa_out8
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#define outw eisa_out16
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#define outl eisa_out32
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#else
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static inline char inb(unsigned long addr)
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{
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BUG();
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return -1;
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}
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static inline short inw(unsigned long addr)
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{
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BUG();
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return -1;
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}
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static inline int inl(unsigned long addr)
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{
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BUG();
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return -1;
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}
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#define outb(x, y) BUG()
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#define outw(x, y) BUG()
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#define outl(x, y) BUG()
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#endif
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/*
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* String versions of in/out ops:
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*/
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extern void insb (unsigned long port, void *dst, unsigned long count);
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extern void insw (unsigned long port, void *dst, unsigned long count);
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extern void insl (unsigned long port, void *dst, unsigned long count);
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extern void outsb (unsigned long port, const void *src, unsigned long count);
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extern void outsw (unsigned long port, const void *src, unsigned long count);
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extern void outsl (unsigned long port, const void *src, unsigned long count);
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/* IO Port space is : BBiiii where BB is HBA number. */
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#define IO_SPACE_LIMIT 0x00ffffff
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/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
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* bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
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* mode (essentially just sign extending. This macro takes in a 32
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* bit I/O address (still with the leading f) and outputs the correct
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* value for either 32 or 64 bit mode */
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#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
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#include <asm-generic/iomap.h>
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/*
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* Convert a physical pointer to a virtual kernel pointer for /dev/mem
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* access
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*/
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#define xlate_dev_mem_ptr(p) __va(p)
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/*
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* Convert a virtual cached pointer to an uncached pointer
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*/
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#define xlate_dev_kmem_ptr(p) p
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#endif
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