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. 14 Jun, 2016 1 commit
  3. 03 Feb, 2014 1 commit
    • Tejun Heo's avatar
      arm, pm, vmpressure: add missing slab.h includes · 1ff6bbfd
      Tejun Heo authored
      arch/arm/mach-tegra/pm.c, kernel/power/console.c and mm/vmpressure.c
      were somehow getting slab.h indirectly through cgroup.h which in turn
      was getting it indirectly through xattr.h.  A scheduled cgroup change
      drops xattr.h inclusion from cgroup.h and breaks compilation of these
      three files.  Add explicit slab.h includes to the three files.
      
      A pending cgroup patch depends on this change and it'd be great if
      this can be routed through cgroup/for-3.14-fixes branch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Acked-by: Stephen Warren's avatarStephen Warren <swarren@wwwdotorg.org>
      Cc: Thierry Reding <thierry.reding@gmail.com>
      Cc: linux-tegra@vger.kernel.org
      Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
      Cc: linux-pm@vger.kernel.org
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Michal Hocko <mhocko@suse.cz>
      Cc: Balbir Singh <bsingharora@gmail.com>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: cgroups@vger.kernel.org
      1ff6bbfd
  4. 21 Dec, 2013 1 commit
    • Masami Ichikawa's avatar
      PM / sleep: Fix memory leak in pm_vt_switch_unregister(). · c6068504
      Masami Ichikawa authored
      kmemleak reported a memory leak as below.
      
      unreferenced object 0xffff880118f14700 (size 32):
        comm "swapper/0", pid 1, jiffies 4294877401 (age 123.283s)
        hex dump (first 32 bytes):
          00 01 10 00 00 00 ad de 00 02 20 00 00 00 ad de  .......... .....
          00 d4 d2 18 01 88 ff ff 01 00 00 00 00 04 00 00  ................
        backtrace:
          [<ffffffff814edb1e>] kmemleak_alloc+0x4e/0xb0
          [<ffffffff811889dc>] kmem_cache_alloc_trace+0x1ec/0x260
          [<ffffffff810aba66>] pm_vt_switch_required+0x76/0xb0
          [<ffffffff812f39f5>] register_framebuffer+0x195/0x320
          [<ffffffff8130af18>] efifb_probe+0x718/0x780
          [<ffffffff81391495>] platform_drv_probe+0x45/0xb0
          [<ffffffff8138f407>] driver_probe_device+0x87/0x3a0
          [<ffffffff8138f7f3>] __driver_attach+0x93/0xa0
          [<ffffffff8138d413>] bus_for_each_dev+0x63/0xa0
          [<ffffffff8138ee5e>] driver_attach+0x1e/0x20
          [<ffffffff8138ea40>] bus_add_driver+0x180/0x250
          [<ffffffff8138fe74>] driver_register+0x64/0xf0
          [<ffffffff813913ba>] __platform_driver_register+0x4a/0x50
          [<ffffffff8191e028>] efifb_driver_init+0x12/0x14
          [<ffffffff8100214a>] do_one_initcall+0xfa/0x1b0
          [<ffffffff818e40e0>] kernel_init_freeable+0x17b/0x201
      
      In pm_vt_switch_required(), "entry" variable is allocated via kmalloc().
      So, in pm_vt_switch_unregister(), it needs to call kfree() when object
      is deleted from list.
      Signed-off-by: default avatarMasami Ichikawa <masami256@gmail.com>
      Reviewed-by: default avatarPavel Machek <pavel@ucw.cz>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      c6068504
  5. 20 Feb, 2013 1 commit
    • Jesse Barnes's avatar
      PM: make VT switching to the suspend console optional v3 · f43f627d
      Jesse Barnes authored
      KMS drivers can potentially restore the display configuration without
      userspace help.  Such drivers can can call a new funciton,
      pm_vt_switch_required(false) if they support this feature.  In that
      case, the PM layer won't VT switch to the suspend console at suspend
      time and then back to the original VT on resume, but rather leave things
      alone for a nicer looking suspend and resume sequence.
      
      v2: make a function so we can handle multiple drivers (Alan)
      v3: use a list to track device requests (Rafael)
      v4: Squash in build fix from Jesse for CONFIG_VT_CONSOLE_SLEEP=n
      v5: Squash in patch from Wu Fengguang to add a few missing static
      qualifiers.
      v6: Add missing EXPORT_SYMBOL.
      Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
      Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> (v3)
      Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      f43f627d
  6. 16 Oct, 2011 1 commit
    • H Hartley Sweeten's avatar
      PM / VT: Cleanup #if defined uglyness and fix compile error · 37cce26b
      H Hartley Sweeten authored
      Introduce the config option CONFIG_VT_CONSOLE_SLEEP in order to cleanup
      the #if defined ugliness for the vt suspend support functions. Note that
      CONFIG_VT_CONSOLE is already dependant on CONFIG_VT.
      
      The function pm_set_vt_switch is actually dependant on CONFIG_VT and not
      CONFIG_PM_SLEEP. This fixes a compile error when CONFIG_PM_SLEEP is
      not set:
      
      drivers/tty/vt/vt_ioctl.c:1794: error: redefinition of 'pm_set_vt_switch'
      include/linux/suspend.h:17: error: previous definition of 'pm_set_vt_switch' was here
      
      Also, remove the incorrect path from the comment in console.c.
      
      [rjw: Replaced #if defined() with #ifdef in suspend.h.]
      Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
      Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      37cce26b
  7. 15 Dec, 2009 1 commit
    • Bernhard Walle's avatar
      vt: introduce and use vt_kmsg_redirect() function · 5ada918b
      Bernhard Walle authored
      The kernel offers with TIOCL_GETKMSGREDIRECT ioctl() the possibility to
      redirect the kernel messages to a specific console.
      
      However, since it's not possible to switch to the kernel message console
      after a panic(), it would be nice if the kernel would print the panic
      message on the current console.
      
      This patch series adds a new interface to access the global kmsg_redirect
      variable by a function to be able to use it in code where
      CONFIG_VT_CONSOLE is not set (kernel/panic.c).
      
      This patch:
      
      Instead of using and exporting a global value kmsg_redirect, introduce a
      function vt_kmsg_redirect() that both can set and return the console where
      messages are printed.
      
      Change all users of kmsg_redirect (the VT code itself and kernel/power.c)
      to the new interface.
      
      The main advantage is that vt_kmsg_redirect() can also be used when
      CONFIG_VT_CONSOLE is not set.
      Signed-off-by: default avatarBernhard Walle <bernhard@bwalle.de>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: Ingo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5ada918b
  8. 19 Sep, 2009 1 commit
  9. 21 Feb, 2009 1 commit
  10. 28 Apr, 2008 1 commit
    • Andres Salomon's avatar
      PM/gxfb: add hook to PM console layer that allows disabling of suspend VT switch · b6f448e9
      Andres Salomon authored
      Prior to suspend, we allocate and switch to a new VT; after suspend, we switch
      back to the original VT.  This can be slow, and is completely unnecessary if
      the framebuffer we're using can restore video properly.
      
      This adds a hook that allows drivers to select whether or not to do this vt
      switch, and changes the gxfb driver to call this hook.  It also adds a module
      param to gxfb to allow controlling of the vt switch (defaulting to no switch).
      
      (Note: I'm not convinced that console_sem is the best way to protect this, but
      we should probably have some form of locking..)
      
      [akpm@linux-foundation.org: build fix]
      Signed-off-by: default avatarAndres Salomon <dilinger@debian.org>
      Cc: Jordan Crouse <jordan.crouse@amd.com>
      Cc: "Antonino A. Daplas" <adaplas@pol.net>
      Cc: Pavel Machek <pavel@ucw.cz>
      Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b6f448e9
  11. 17 Mar, 2007 1 commit
  12. 08 Feb, 2006 1 commit
  13. 01 Feb, 2006 1 commit
  14. 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