1. 30 May, 2019 1 commit
    • Thomas Gleixner's avatar
      treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 · c942fddf
      Thomas Gleixner authored
      Based on 3 normalized pattern(s):
        this program is free software you can redistribute it and or modify
        it under the terms of the gnu general public license as published by
        the free software foundation either version 2 of the license or at
        your option any later version this program is distributed in the
        hope that it will be useful but without any warranty without even
        the implied warranty of merchantability or fitness for a particular
        purpose see the gnu general public license for more details
        this program is free software you can redistribute it and or modify
        it under the terms of the gnu general public license as published by
        the free software foundation either version 2 of the license or at
        your option any later version [author] [kishon] [vijay] [abraham]
        [i] [kishon]@[ti] [com] this program is distributed in the hope that
        it will be useful but without any warranty without even the implied
        warranty of merchantability or fitness for a particular purpose see
        the gnu general public license for more details
        this program is free software you can redistribute it and or modify
        it under the terms of the gnu general public license as published by
        the free software foundation either version 2 of the license or at
        your option any later version [author] [graeme] [gregory]
        [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
        [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
        [hk] [hemahk]@[ti] [com] this program is distributed in the hope
        that it will be useful but without any warranty without even the
        implied warranty of merchantability or fitness for a particular
        purpose see the gnu general public license for more details
      extracted by the scancode license scanner the SPDX license identifier
      has been chosen to replace the boilerplate/reference in 1105 file(s).
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarAllison Randal <allison@lohutok.net>
      Reviewed-by: default avatarRichard Fontana <rfontana@redhat.com>
      Reviewed-by: default avatarKate Stewart <kstewart@linuxfoundation.org>
      Cc: linux-spdx@vger.kernel.org
      Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.deSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
  2. 08 Oct, 2018 1 commit
  3. 21 Feb, 2018 1 commit
    • Ognjen Galic's avatar
      battery: Add the battery hooking API · fa93854f
      Ognjen Galic authored
      This is a patch that implements a generic hooking API for the
      generic ACPI battery driver.
      With this new generic API, drivers can expose platform specific
      behaviour via sysfs attributes in /sys/class/power_supply/BATn/
      in a generic way.
      A perfect example of the need for this API are Lenovo ThinkPads.
      Lenovo ThinkPads have a ACPI extension that allows the setting of
      start and stop charge thresholds in the EC and battery firmware
      via ACPI. The thinkpad_acpi module can use this API to expose
      sysfs attributes that it controls inside the ACPI battery driver
      sysfs tree, under /sys/class/power_supply/BATN/.
      The file drivers/acpi/battery.h has been moved to
      include/acpi/battery.h and the includes inside ac.c, sbs.c, and
      battery.c have been adjusted to reflect that.
      When drivers hooks into the API, the API calls add_battery() for
      each battery in the system that passes it a acpi_battery
      struct. Then, the drivers can use device_create_file() to create
      new sysfs attributes with that struct and identify the batteries
      for per-battery attributes.
      Signed-off-by: default avatarOgnjen Galic <smclt30p@gmail.com>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
  4. 24 Aug, 2017 1 commit
  5. 03 Aug, 2017 1 commit
    • Lukas Wunner's avatar
      treewide: Consolidate Apple DMI checks · 630b3aff
      Lukas Wunner authored
      We're about to amend ACPI bus scan with DMI checks whether we're running
      on a Mac to support Apple device properties in AML.  The DMI checks are
      performed for every single device, adding overhead for everything x86
      that isn't Apple, which is the majority.  Rafael and Andy therefore
      request to perform the DMI match only once and cache the result.
      Outside of ACPI various other Apple DMI checks exist and it seems
      reasonable to use the cached value there as well.  Rafael, Andy and
      Darren suggest performing the DMI check in arch code and making it
      available with a header in include/linux/platform_data/x86/.
      To this end, add early_platform_quirks() to arch/x86/kernel/quirks.c
      to perform the DMI check and invoke it from setup_arch().  Switch over
      all existing Apple DMI checks, thereby fixing two deficiencies:
      * They are now #defined to false on non-x86 arches and can thus be
        optimized away if they're located in cross-arch code.
      * Some of them only match "Apple Inc." but not "Apple Computer, Inc.",
        which is used by BIOSes released between January 2006 (when the first
        x86 Macs started shipping) and January 2007 (when the company name
        changed upon introduction of the iPhone).
      Suggested-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
      Suggested-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      Suggested-by: default avatarDarren Hart <dvhart@infradead.org>
      Signed-off-by: default avatarLukas Wunner <lukas@wunner.de>
      Acked-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
  6. 04 Jan, 2016 1 commit
  7. 08 Jul, 2015 1 commit
  8. 28 Apr, 2015 1 commit
  9. 13 Mar, 2015 2 commits
    • Krzysztof Kozlowski's avatar
      power_supply: Change ownership from driver to core · 297d716f
      Krzysztof Kozlowski authored
      Change the ownership of power_supply structure from each driver
      implementing the class to the power supply core.
      The patch changes power_supply_register() function thus all drivers
      implementing power supply class are adjusted.
      Each driver provides the implementation of power supply. However it
      should not be the owner of power supply class instance because it is
      exposed by core to other subsystems with power_supply_get_by_name().
      These other subsystems have no knowledge when the driver will unregister
      the power supply. This leads to several issues when driver is unbound -
      mostly because user of power supply accesses freed memory.
      Instead let the core own the instance of struct 'power_supply'.  Other
      users of this power supply will still access valid memory because it
      will be freed when device reference count reaches 0. Currently this
      means "it will leak" but power_supply_put() call in next patches will
      solve it.
      This solves invalid memory references in following race condition
      Thread 1: charger manager
      Thread 2: power supply driver, used by charger manager
      THREAD 1 (charger manager)         THREAD 2 (power supply driver)
      ==========================         ==============================
      psy = power_supply_get_by_name()
                                         Driver unbind, .remove
                                           Device fully removed
      The 'get_property' call is executed in invalid context because the driver was
      unbound and struct 'power_supply' memory was freed.
      This could be observed easily with charger manager driver (here compiled
      with max17040 fuel gauge):
      $ cat /sys/devices/virtual/power_supply/cm-battery/capacity &
      $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind
      [   55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000
      [   55.732584] pgd = d98d4000
      [   55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000
      [   55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
      [   55.746210] Modules linked in:
      [   55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G        W       3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496
      [   55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
      [   55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000
      [   55.771647] PC is at 0x0
      [   55.774182] LR is at charger_get_property+0x2f4/0x36c
      [   55.779201] pc : [<00000000>]    lr : [<c034b0b4>]    psr: 60000013
      [   55.779201] sp : daf55e90  ip : 00000003  fp : 00000000
      [   55.790657] r10: 00000000  r9 : c06e2878  r8 : d9b26c68
      [   55.795865] r7 : dad81610  r6 : daec7410  r5 : daf55ebc  r4 : 00000000
      [   55.802367] r3 : 00000000  r2 : daf55ebc  r1 : 0000002a  r0 : d9b26c68
      [   55.808879] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
      [   55.815994] Control: 10c5387d  Table: 598d406a  DAC: 00000015
      [   55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210)
      [   55.827451] Stack: (0xdaf55e90 to 0xdaf56000)
      [   55.831795] 5e80:                                     60000013 c01459c4 0000002a c06f8ef8
      [   55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4
      [   55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80
      [   55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001
      [   55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000
      [   55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000
      [   55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124
      [   55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550
      [   55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364
      [   55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c
      [   55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000
      [   55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000
      [   55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c)
      [   55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48)
      [   55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104)
      [   55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28)
      [   55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484)
      [   55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c)
      [   55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100)
      [   55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c)
      [   55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48)
      [   56.000626] Code: bad PC value
      [   56.011652] ---[ end trace 7b64343fbdae8ef1 ]---
      Signed-off-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
      Reviewed-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
      [for the nvec part]
      Reviewed-by: default avatarMarc Dietrich <marvin24@gmx.de>
      [for compal-laptop.c]
      Acked-by: default avatarDarren Hart <dvhart@linux.intel.com>
      [for the mfd part]
      Acked-by: default avatarLee Jones <lee.jones@linaro.org>
      [for the hid part]
      Acked-by: default avatarJiri Kosina <jkosina@suse.cz>
      [for the acpi part]
      Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      Signed-off-by: Sebastian Reichel's avatarSebastian Reichel <sre@kernel.org>
    • Krzysztof Kozlowski's avatar
      power_supply: Move run-time configuration to separate structure · 2dc9215d
      Krzysztof Kozlowski authored
      Add new structure 'power_supply_config' for holding run-time
      initialization data like of_node, supplies and private driver data.
      The power_supply_register() function is changed so all power supply
      drivers need updating.
      When registering the power supply this new 'power_supply_config' should be
      used instead of directly initializing 'struct power_supply'. This allows
      changing the ownership of power_supply structure from driver to the
      power supply core in next patches.
      When a driver does not use of_node or supplies then it should use NULL
      as config. If driver uses of_node or supplies then it should allocate
      config on stack and initialize it with proper values.
      Signed-off-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
      Reviewed-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
      Acked-by: default avatarPavel Machek <pavel@ucw.cz>
      [for the nvec part]
      Reviewed-by: default avatarMarc Dietrich <marvin24@gmx.de>
      [for drivers/platform/x86/compal-laptop.c]
      Reviewed-by: default avatarDarren Hart <dvhart@linux.intel.com>
      [for drivers/hid/*]
      Reviewed-by: default avatarJiri Kosina <jkosina@suse.cz>
      Signed-off-by: Sebastian Reichel's avatarSebastian Reichel <sre@kernel.org>
  10. 27 Sep, 2014 1 commit
  11. 24 Sep, 2014 2 commits
  12. 19 Mar, 2014 1 commit
  13. 13 Feb, 2014 2 commits
  14. 11 Oct, 2013 1 commit
  15. 15 Jul, 2013 1 commit
  16. 01 May, 2013 1 commit
  17. 09 Apr, 2013 1 commit
    • Al Viro's avatar
      procfs: new helper - PDE_DATA(inode) · d9dda78b
      Al Viro authored
      The only part of proc_dir_entry the code outside of fs/proc
      really cares about is PDE(inode)->data.  Provide a helper
      for that; static inline for now, eventually will be moved
      to fs/proc, along with the knowledge of struct proc_dir_entry
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
  18. 25 Jan, 2013 1 commit
  19. 10 Aug, 2012 1 commit
  20. 01 Jul, 2012 1 commit
  21. 21 Jul, 2011 1 commit
    • Phil Carmody's avatar
      treewide: fix potentially dangerous trailing ';' in #defined values/expressions · 497888cf
      Phil Carmody authored
      All these are instances of
        #define NAME value;
        #define NAME(params_opt) value;
      These of course fail to build when used in contexts like
        if(foo $OP NAME)
        while(bar $OP NAME)
      and may silently generate the wrong code in contexts such as
        foo = NAME + 1;    /* foo = value; + 1; */
        bar = NAME - 1;    /* bar = value; - 1; */
        baz = NAME & quux; /* baz = value; & quux; */
      Reported on comp.lang.c,
      Message-ID: <ab0d55fe-25e5-482b-811e-c475aa6065c3@c29g2000yqd.googlegroups.com>
      Initial analysis of the dangers provided by Keith Thompson in that thread.
      There are many more instances of more complicated macros having unnecessary
      trailing semicolons, but this pile seems to be all of the cases of simple
      values suffering from the problem. (Thus things that are likely to be found
      in one of the contexts above, more complicated ones aren't.)
      Signed-off-by: default avatarPhil Carmody <ext-phil.2.carmody@nokia.com>
      Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
  22. 14 Jul, 2011 2 commits
  23. 12 Jan, 2011 1 commit
    • Zhang Rui's avatar
      ACPI: delete CONFIG_ACPI_PROCFS_POWER and power procfs I/F in 2.6.39 · 6d855fcd
      Zhang Rui authored
      sysfs I/F for ACPI power devices, including AC and Battery,
      has been working in upstream kenrel since 2.6.24, Sep 2007.
      In 2.6.37, we made the sysfs I/F always built in and this option
      disabled by default.
      Now, we plan to remove this option and the ACPI power procfs
      interface in 2.6.39.
      First, update the feature-removal-schedule to announce this change.
      Second, add runtime warnings in ACPI AC/Battery/SBS driver, so that
      users will notice this change even if "make oldconfig" is used.
      Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
  24. 16 Oct, 2010 1 commit
  25. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      The script does the followings.
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
      The conversion was done in the following steps.
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
      6. percpu.h was updated not to include slab.h.
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
  26. 16 Jan, 2010 1 commit
  27. 15 Jan, 2010 1 commit
  28. 28 Aug, 2009 1 commit
  29. 04 Apr, 2009 1 commit
  30. 30 Mar, 2009 1 commit
    • Alexey Dobriyan's avatar
      proc 2/2: remove struct proc_dir_entry::owner · 99b76233
      Alexey Dobriyan authored
      Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy
      as correctly noted at bug #12454. Someone can lookup entry with NULL
      ->owner, thus not pinning enything, and release it later resulting
      in module refcount underflow.
      We can keep ->owner and supply it at registration time like ->proc_fops
      and ->data.
      But this leaves ->owner as easy-manipulative field (just one C assignment)
      and somebody will forget to unpin previous/pin current module when
      switching ->owner. ->proc_fops is declared as "const" which should give
      some thoughts.
      ->read_proc/->write_proc were just fixed to not require ->owner for
      rmmod'ed directories will be empty and return "." and ".." -- no harm.
      And directories with tricky enough readdir and lookup shouldn't be modular.
      We definitely don't want such modular code.
      Removing ->owner will also make PDE smaller.
      So, let's nuke it.
      Kudos to Jeff Layton for reminding about this, let's say, oversight.
      http://bugzilla.kernel.org/show_bug.cgi?id=12454Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
  31. 28 Mar, 2009 1 commit
  32. 20 Oct, 2008 1 commit
    • Parag Warudkar's avatar
      x86: sysfs: kill owner field from attribute · 01e8ef11
      Parag Warudkar authored
      Tejun's commit 7b595756 made sysfs
      attribute->owner unnecessary.  But the field was left in the structure to
      ease the merge.  It's been over a year since that change and it is now
      time to start killing attribute->owner along with its users - one arch at
      a time!
      This patch is attempt #1 to get rid of attribute->owner only for
      CONFIG_X86_64 or CONFIG_X86_32 .  We will deal with other arches later on
      as and when possible - avr32 will be the next since that is something I
      can test.  Compile (make allyesconfig / make allmodconfig / custom config)
      and boot tested.
      akpm: the idea is that we put the declaration of sttribute.owner inside
      `#ifndef CONFIG_X86'.  But that proved to be too ambitious for now because
      new usages kept on turning up in subsystem trees.
      [akpm: remove the ifdef for now]
      Signed-off-by: default avatarParag Warudkar <parag.lkml@gmail.com>
      Cc: Greg KH <greg@kroah.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Tejun Heo <htejun@gmail.com>
      Cc: Len Brown <lenb@kernel.org>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Jean Delvare <khali@linux-fr.org>
      Cc: Roland Dreier <rolandd@cisco.com>
      Cc: David Brownell <david-b@pacbell.net>
      Cc: Alessandro Zummo <a.zummo@towertech.it>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
  33. 10 Oct, 2008 1 commit
  34. 29 Apr, 2008 1 commit
  35. 09 Feb, 2008 1 commit
  36. 07 Feb, 2008 1 commit
    • Adrian Bunk's avatar
      ACPI: misc cleanups · e5685b9d
      Adrian Bunk authored
          This patch contains the following possible cleanups:
          - make the following needlessly global code static:
            - drivers/acpi/bay.c:dev_attr_eject
            - drivers/acpi/bay.c:dev_attr_present
            - drivers/acpi/dock.c:dev_attr_docked
            - drivers/acpi/dock.c:dev_attr_flags
            - drivers/acpi/dock.c:dev_attr_uid
            - drivers/acpi/dock.c:dev_attr_undock
            - drivers/acpi/pci_bind.c:acpi_pci_unbind()
            - drivers/acpi/pci_link.c:acpi_link_lock
            - drivers/acpi/sbs.c:acpi_sbs_callback()
            - drivers/acpi/sbshc.c:acpi_smbus_transaction()
            - drivers/acpi/sleep/main.c:acpi_sleep_prepare()
          - #if 0 the following unused global functions:
            - drivers/acpi/numa.c:acpi_unmap_pxm_to_node()
          - remove the following unused EXPORT_SYMBOL's:
            - acpi_register_gsi
            - acpi_unregister_gsi
            - acpi_strict
            - acpi_bus_receive_event
            - register_acpi_bus_type
            - unregister_acpi_bus_type
            - acpi_os_printf
            - acpi_os_sleep
            - acpi_os_stall
            - acpi_os_read_pci_configuration
            - acpi_os_create_semaphore
            - acpi_os_delete_semaphore
            - acpi_os_wait_semaphore
            - acpi_os_signal_semaphore
            - acpi_os_signal
            - acpi_pci_irq_enable
            - acpi_get_pxm
      Signed-off-by: default avatarAdrian Bunk <bunk@kernel.org>
      Acked-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>