1. 02 Nov, 2017 1 commit
    • Greg Kroah-Hartman's avatar
      License cleanup: add SPDX GPL-2.0 license identifier to files with no license · b2441318
      Greg Kroah-Hartman authored
      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: default avatarKate Stewart <kstewart@linuxfoundation.org>
      Reviewed-by: default avatarPhilippe Ombredanne <pombredanne@nexb.com>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      b2441318
  2. 17 May, 2012 1 commit
    • Paul Gortmaker's avatar
      MCA: delete all remaining traces of microchannel bus support. · bb8187d3
      Paul Gortmaker authored
      Hardware with MCA bus is limited to 386 and 486 class machines
      that are now 20+ years old and typically with less than 32MB
      of memory.  A quick search on the internet, and you see that
      even the MCA hobbyist/enthusiast community has lost interest
      in the early 2000 era and never really even moved ahead from
      the 2.4 kernels to the 2.6 series.
      
      This deletes anything remaining related to CONFIG_MCA from core
      kernel code and from the x86 architecture.  There is no point in
      carrying this any further into the future.
      
      One complication to watch for is inadvertently scooping up
      stuff relating to machine check, since there is overlap in
      the TLA name space (e.g. arch/x86/boot/mca.c).
      
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: James Bottomley <JBottomley@Parallels.com>
      Cc: x86@kernel.org
      Acked-by: default avatarIngo Molnar <mingo@elte.hu>
      Acked-by: default avatarH. Peter Anvin <hpa@zytor.com>
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      bb8187d3
  3. 05 Jan, 2011 1 commit
    • Yinghai Lu's avatar
      x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion · cb2ded37
      Yinghai Lu authored
      Found one x2apic pre-enabled system, x2apic_mode suddenly get
      corrupted after register some cpus, when compiled
      CONFIG_NR_CPUS=255 instead of 512.
      
      It turns out that generic_processor_info() ==> phyid_set(apicid,
      phys_cpu_present_map) causes the problem.
      
      phys_cpu_present_map is sized by MAX_APICS bits, and pre-enabled
      system some cpus have an apic id > 255.
      
      The variable after phys_cpu_present_map may get corrupted
      silently:
      
       ffffffff828e8420 B phys_cpu_present_map
       ffffffff828e8440 B apic_verbosity
       ffffffff828e8444 B local_apic_timer_c2_ok
       ffffffff828e8448 B disable_apic
       ffffffff828e844c B x2apic_mode
       ffffffff828e8450 B x2apic_disabled
       ffffffff828e8454 B num_processors
       ...
      
      Actually phys_cpu_present_map is referenced via apic id, instead
      index. We should use MAX_LOCAL_APIC instead MAX_APICS.
      
      For 64-bit it will be 32768 in all cases. BSS will increase by 4k bytes
      on 64-bit:
      
      	text		data		bss		dec		filename
      	21696943	4193748		12787712	38678403	vmlinux.before
      	21696943	4193748		12791808	38682499	vmlinux.after
      
      No change on 32bit.
      
      Finally we can remove MAX_APCIS that was rather confusing.
      Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
      Cc: H. Peter Anvin <hpa@linux.intel.com>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      LKML-Reference: <4D23BD9C.3070102@kernel.org>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      cb2ded37
  4. 08 Jan, 2009 2 commits
  5. 05 Jan, 2009 7 commits
  6. 04 Jan, 2009 7 commits
  7. 23 Oct, 2008 2 commits
  8. 22 Jul, 2008 1 commit
    • Vegard Nossum's avatar
      x86: consolidate header guards · 77ef50a5
      Vegard Nossum authored
      This patch is the result of an automatic script that consolidates the
      format of all the headers in include/asm-x86/.
      
      The format:
      
      1. No leading underscore. Names with leading underscores are reserved.
      2. Pathname components are separated by two underscores. So we can
         distinguish between mm_types.h and mm/types.h.
      3. Everything except letters and numbers are turned into single
         underscores.
      Signed-off-by: default avatarVegard Nossum <vegard.nossum@gmail.com>
      77ef50a5
  9. 08 Jul, 2008 1 commit
  10. 17 Apr, 2008 2 commits
  11. 30 Jan, 2008 1 commit
  12. 11 Oct, 2007 1 commit
  13. 07 Dec, 2006 1 commit
  14. 06 Jan, 2006 1 commit
  15. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4