1. 21 Nov, 2017 2 commits
  2. 08 Nov, 2017 3 commits
  3. 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
  4. 21 Oct, 2017 1 commit
  5. 18 Oct, 2017 1 commit
    • Fabio Estevam's avatar
      cpufreq: imx6q: Move speed grading check to cpufreq driver · 8e2b04b0
      Fabio Estevam authored
      On some i.MX6 SoCs (like i.MX6SL, i.MX6SX and i.MX6UL) that do not have
      speed grading check, opp table will not be created in platform code,
      so cpufreq driver prints the following error message:
      
      cpu cpu0: dev_pm_opp_get_opp_count: OPP table not found (-19)
      
      However, this is not really an error in this case because the
      imx6q-cpufreq driver first calls dev_pm_opp_get_opp_count()
      and if it fails, it means that platform code does not provide
      OPP and then dev_pm_opp_of_add_table() will be called.
      
      In order to avoid such confusing error message, move the speed grading
      check from platform code to the imx6q-cpufreq driver.
      
      This way the imx6q-cpufreq no longer has to check whether OPP table
      is supplied by platform code.
      
      Tested on a i.MX6Q and i.MX6UL based boards.
      Signed-off-by: default avatarFabio Estevam <fabio.estevam@nxp.com>
      Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
      8e2b04b0
  6. 13 Oct, 2017 2 commits
  7. 10 Oct, 2017 2 commits
  8. 05 Oct, 2017 1 commit
    • Kees Cook's avatar
      timer: Remove init_timer_pinned_deferrable() in favor of timer_setup() · 1d1fe902
      Kees Cook authored
      This refactors the only user of init_timer_pinned_deferrable() to use the
      new timer_setup() and from_timer(). Adds a pointer back to the policy,
      and drops the definition of init_timer_pinned_deferrable().
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: linux-mips@linux-mips.org
      Cc: Petr Mladek <pmladek@suse.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Lai Jiangshan <jiangshanlai@gmail.com>
      Cc: Sebastian Reichel <sre@kernel.org>
      Cc: Kalle Valo <kvalo@qca.qualcomm.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Pavel Machek <pavel@ucw.cz>
      Cc: linux1394-devel@lists.sourceforge.net
      Cc: Chris Metcalf <cmetcalf@mellanox.com>
      Cc: linux-s390@vger.kernel.org
      Cc: linux-wireless@vger.kernel.org
      Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
      Cc: Wim Van Sebroeck <wim@iguana.be>
      Cc: Michael Ellerman <mpe@ellerman.id.au>
      Cc: Ursula Braun <ubraun@linux.vnet.ibm.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Viresh Kumar <viresh.kumar@linaro.org>
      Cc: Harish Patil <harish.patil@cavium.com>
      Cc: Stephen Boyd <sboyd@codeaurora.org>
      Cc: Guenter Roeck <linux@roeck-us.net>
      Cc: Manish Chopra <manish.chopra@cavium.com>
      Cc: Len Brown <len.brown@intel.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: linux-pm@vger.kernel.org
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Julian Wiedmann <jwi@linux.vnet.ibm.com>
      Cc: John Stultz <john.stultz@linaro.org>
      Cc: Mark Gross <mark.gross@intel.com>
      Cc: linux-watchdog@vger.kernel.org
      Cc: linux-scsi@vger.kernel.org
      Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
      Cc: Michael Reed <mdr@sgi.com>
      Cc: netdev@vger.kernel.org
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: linuxppc-dev@lists.ozlabs.org
      Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
      Link: https://lkml.kernel.org/r/1507159627-127660-3-git-send-email-keescook@chromium.org
      1d1fe902
  9. 03 Oct, 2017 7 commits
  10. 25 Sep, 2017 1 commit
    • Suniel Mahesh's avatar
      cpufreq: dt: Fix sysfs duplicate filename creation for platform-device · d477bf3a
      Suniel Mahesh authored
      ti-cpufreq and cpufreq-dt-platdev drivers are registering platform-device
      with same name "cpufreq-dt" using platform_device_register_*() routines.
      This is leading to build warnings appended below.
      
      Providing hardware information to OPP framework along with the platform-
      device creation should be done by ti-cpufreq driver before cpufreq-dt
      driver comes into place.
      
      This patch add's TI am33xx, am43 and dra7 platforms (which use opp-v2
      property) to the blacklist of devices in cpufreq-dt-platform driver to
      avoid creating platform-device twice and remove build warnings.
      
      [    2.370167] ------------[ cut here ]------------
      [    2.375087] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x58/0x78
      [    2.383112] sysfs: cannot create duplicate filename '/devices/platform/cpufreq-dt'
      [    2.391219] Modules linked in:
      [    2.394506] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0-next-20170912 #1
      [    2.402006] Hardware name: Generic AM33XX (Flattened Device Tree)
      [    2.408437] [<c0110a28>] (unwind_backtrace) from [<c010ca84>] (show_stack+0x10/0x14)
      [    2.416568] [<c010ca84>] (show_stack) from [<c0827d64>] (dump_stack+0xac/0xe0)
      [    2.424165] [<c0827d64>] (dump_stack) from [<c0137470>] (__warn+0xd8/0x104)
      [    2.431488] [<c0137470>] (__warn) from [<c01374d0>] (warn_slowpath_fmt+0x34/0x44)
      [    2.439351] [<c01374d0>] (warn_slowpath_fmt) from [<c03459d0>] (sysfs_warn_dup+0x58/0x78)
      [    2.447938] [<c03459d0>] (sysfs_warn_dup) from [<c0345ab8>] (sysfs_create_dir_ns+0x80/0x98)
      [    2.456719] [<c0345ab8>] (sysfs_create_dir_ns) from [<c082c554>] (kobject_add_internal+0x9c/0x2d4)
      [    2.466124] [<c082c554>] (kobject_add_internal) from [<c082c7d8>] (kobject_add+0x4c/0x9c)
      [    2.474712] [<c082c7d8>] (kobject_add) from [<c05803e4>] (device_add+0xcc/0x57c)
      [    2.482489] [<c05803e4>] (device_add) from [<c0584b74>] (platform_device_add+0x100/0x220)
      [    2.491085] [<c0584b74>] (platform_device_add) from [<c05855a8>] (platform_device_register_full+0xf4/0x118)
      [    2.501305] [<c05855a8>] (platform_device_register_full) from [<c067023c>] (ti_cpufreq_init+0x150/0x22c)
      [    2.511253] [<c067023c>] (ti_cpufreq_init) from [<c0101df4>] (do_one_initcall+0x3c/0x170)
      [    2.519838] [<c0101df4>] (do_one_initcall) from [<c0c00eb4>] (kernel_init_freeable+0x1fc/0x2c4)
      [    2.528974] [<c0c00eb4>] (kernel_init_freeable) from [<c083bcac>] (kernel_init+0x8/0x110)
      [    2.537565] [<c083bcac>] (kernel_init) from [<c0107d18>] (ret_from_fork+0x14/0x3c)
      [    2.545981] ---[ end trace 2fc00e213c13ab20 ]---
      [    2.551051] ------------[ cut here ]------------
      [    2.555931] WARNING: CPU: 0 PID: 1 at lib/kobject.c:240 kobject_add_internal+0x254/0x2d4
      [    2.564578] kobject_add_internal failed for cpufreq-dt with -EEXIST, don't try to register
      things with the same name in the same directory.
      [    2.577977] Modules linked in:
      [    2.581261] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       4.13.0-next-20170912 #1
      [    2.590013] Hardware name: Generic AM33XX (Flattened Device Tree)
      [    2.596437] [<c0110a28>] (unwind_backtrace) from [<c010ca84>] (show_stack+0x10/0x14)
      [    2.604573] [<c010ca84>] (show_stack) from [<c0827d64>] (dump_stack+0xac/0xe0)
      [    2.612172] [<c0827d64>] (dump_stack) from [<c0137470>] (__warn+0xd8/0x104)
      [    2.619494] [<c0137470>] (__warn) from [<c01374d0>] (warn_slowpath_fmt+0x34/0x44)
      [    2.627362] [<c01374d0>] (warn_slowpath_fmt) from [<c082c70c>] (kobject_add_internal+0x254/0x2d4)
      [    2.636666] [<c082c70c>] (kobject_add_internal) from [<c082c7d8>] (kobject_add+0x4c/0x9c)
      [    2.645255] [<c082c7d8>] (kobject_add) from [<c05803e4>] (device_add+0xcc/0x57c)
      [    2.653027] [<c05803e4>] (device_add) from [<c0584b74>] (platform_device_add+0x100/0x220)
      [    2.661615] [<c0584b74>] (platform_device_add) from [<c05855a8>] (platform_device_register_full+0xf4/0x118)
      [    2.671833] [<c05855a8>] (platform_device_register_full) from [<c067023c>] (ti_cpufreq_init+0x150/0x22c)
      [    2.681779] [<c067023c>] (ti_cpufreq_init) from [<c0101df4>] (do_one_initcall+0x3c/0x170)
      [    2.690377] [<c0101df4>] (do_one_initcall) from [<c0c00eb4>] (kernel_init_freeable+0x1fc/0x2c4)
      [    2.699510] [<c0c00eb4>] (kernel_init_freeable) from [<c083bcac>] (kernel_init+0x8/0x110)
      [    2.708106] [<c083bcac>] (kernel_init) from [<c0107d18>] (ret_from_fork+0x14/0x3c)
      [    2.716217] ---[ end trace 2fc00e213c13ab21 ]---
      
      Fixes: edeec420 (cpufreq: dt-cpufreq: platdev Automatically create device with OPP v2)
      Signed-off-by: default avatarSuniel Mahesh <sunil.m@techveda.org>
      Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      d477bf3a
  11. 19 Sep, 2017 2 commits
  12. 14 Sep, 2017 1 commit
  13. 28 Aug, 2017 3 commits
  14. 24 Aug, 2017 4 commits
  15. 22 Aug, 2017 2 commits
    • Viresh Kumar's avatar
      cpufreq: Cap the default transition delay value to 10 ms · e948bc8f
      Viresh Kumar authored
      If transition_delay_us isn't defined by the cpufreq driver, the default
      value of transition delay (time after which the cpufreq governor will
      try updating the frequency again) is currently calculated by multiplying
      transition_latency (nsec) with LATENCY_MULTIPLIER (1000) and then
      converting this time to usec. That gives the exact same value as
      transition_latency, just that the time unit is usec instead of nsec.
      
      With acpi-cpufreq for example, transition_latency is set to around 10
      usec and we get transition delay as 10 ms. Which seems to be a
      reasonable amount of time to reevaluate the frequency again.
      
      But for platforms where frequency switching isn't that fast (like ARM),
      the transition_latency varies from 500 usec to 3 ms, and the transition
      delay becomes 500 ms to 3 seconds. Of course, that is a pretty bad
      default value to start with.
      
      We can try to come across a better formula (instead of multiplying with
      LATENCY_MULTIPLIER) to solve this problem, but will that be worth it ?
      
      This patch tries a simple approach and caps the maximum value of default
      transition delay to 10 ms. Of course, userspace can still come in and
      change this value anytime or individual drivers can rather provide
      transition_delay_us instead.
      Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      e948bc8f
    • Linus Walleij's avatar
      cpufreq: dbx500: Delete obsolete driver · 919096f7
      Linus Walleij authored
      We have moved the Ux500 over to use the generic DT based
      cpufreq driver, so delete the old custom driver.
      
      At the same time select CPUFREQ_DT from the machine's
      Kconfig in order to satisfy the "default ARCH_U8500"
      selection on the old driver.
      Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      919096f7
  16. 17 Aug, 2017 4 commits
  17. 10 Aug, 2017 1 commit
  18. 09 Aug, 2017 2 commits