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 Nov, 2011 1 commit
    • H. Peter Anvin's avatar
      x86: Generate system call tables and unistd_*.h from tables · 303395ac
      H. Peter Anvin authored
      Generate system call tables and unistd_*.h automatically from the
      tables in arch/x86/syscalls.  All other information, like NR_syscalls,
      is auto-generated, some of which is in asm-offsets_*.c.
      
      This allows us to keep all the system call information in one place,
      and allows for kernel space and user space to see different
      information; this is currently used for the ia32 system call numbers
      when building the 64-bit kernel, but will be used by the x32 ABI in
      the near future.
      
      This also removes some gratuitious differences between i386, x86-64
      and ia32; in particular, now all system call tables are generated with
      the same mechanism.
      
      Cc: H. J. Lu <hjl.tools@gmail.com>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Cc: Michal Marek <mmarek@suse.cz>
      Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
      303395ac
  3. 23 Oct, 2008 2 commits
  4. 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
  5. 30 Jan, 2008 1 commit
  6. 11 Oct, 2007 1 commit
  7. 26 Jun, 2006 1 commit
  8. 09 Apr, 2006 2 commits
  9. 12 Feb, 2006 1 commit
    • Ulrich Drepper's avatar
      [PATCH] fstatat64 support · cff2b760
      Ulrich Drepper authored
      The *at patches introduced fstatat and, due to inusfficient research, I
      used the newfstat functions generally as the guideline.  The result is that
      on 32-bit platforms we don't have all the information needed to implement
      fstatat64.
      
      This patch modifies the code to pass up 64-bit information if
      __ARCH_WANT_STAT64 is defined.  I renamed the syscall entry point to make
      this clear.  Other archs will continue to use the existing code.  On x86-64
      the compat code is implemented using a new sys32_ function.  this is what
      is done for the other stat syscalls as well.
      
      This patch might break some other archs (those which define
      __ARCH_WANT_STAT64 and which already wired up the syscall).  Yet others
      might need changes to accomodate the compatibility mode.  I really don't
      want to do that work because all this stat handling is a mess (more so in
      glibc, but the kernel is also affected).  It should be done by the arch
      maintainers.  I'll provide some stand-alone test shortly.  Those who are
      eager could compile glibc and run 'make check' (no installation needed).
      
      The patch below has been tested on x86 and x86-64.
      Signed-off-by: default avatarUlrich Drepper <drepper@redhat.com>
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Andi Kleen <ak@muc.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      cff2b760
  10. 08 Feb, 2006 1 commit
  11. 01 Feb, 2006 1 commit
  12. 19 Jan, 2006 1 commit
  13. 09 Jan, 2006 1 commit
    • Christoph Lameter's avatar
      [PATCH] Swap Migration V5: sys_migrate_pages interface · 39743889
      Christoph Lameter authored
      sys_migrate_pages implementation using swap based page migration
      
      This is the original API proposed by Ray Bryant in his posts during the first
      half of 2005 on linux-mm@kvack.org and linux-kernel@vger.kernel.org.
      
      The intent of sys_migrate is to migrate memory of a process.  A process may
      have migrated to another node.  Memory was allocated optimally for the prior
      context.  sys_migrate_pages allows to shift the memory to the new node.
      
      sys_migrate_pages is also useful if the processes available memory nodes have
      changed through cpuset operations to manually move the processes memory.  Paul
      Jackson is working on an automated mechanism that will allow an automatic
      migration if the cpuset of a process is changed.  However, a user may decide
      to manually control the migration.
      
      This implementation is put into the policy layer since it uses concepts and
      functions that are also needed for mbind and friends.  The patch also provides
      a do_migrate_pages function that may be useful for cpusets to automatically
      move memory.  sys_migrate_pages does not modify policies in contrast to Ray's
      implementation.
      
      The current code here is based on the swap based page migration capability and
      thus is not able to preserve the physical layout relative to it containing
      nodeset (which may be a cpuset).  When direct page migration becomes available
      then the implementation needs to be changed to do a isomorphic move of pages
      between different nodesets.  The current implementation simply evicts all
      pages in source nodeset that are not in the target nodeset.
      
      Patch supports ia64, i386 and x86_64.
      Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      39743889
  14. 26 Jul, 2005 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