Eric Lee / smarc-fsl-linux-kernel

19 Oct, 2007

4 commits

  • 8f4ce8c32   serial: turn serial console suspend a boot rather than compile time option ... Browse Code »

    Currently, there's a CONFIG_DISABLE_CONSOLE_SUSPEND that allows one to stop
    the serial console from being suspended when the rest of the machine goes
    to sleep. This is incredibly useful for debugging power management-related
    things; however, having it as a compile-time option has proved to be
    incredibly inconvenient for us (OLPC). There are plenty of times that we
    want serial console to not suspend, but for the most part we'd like serial
    console to be suspended.

    This drops CONFIG_DISABLE_CONSOLE_SUSPEND, and replaces it with a kernel
    boot parameter (no_console_suspend). By default, the serial console will
    be suspended along with the rest of the system; by passing
    'no_console_suspend' to the kernel during boot, serial console will remain
    alive during suspend.

    For now, this is pretty serial console specific; further fixes could be
    applied to make this work for things like netconsole.

    Signed-off-by: Andres Salomon
    Acked-by: "Rafael J. Wysocki"
    Acked-by: Pavel Machek
    Cc: Nigel Cunningham
    Cc: Russell King
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andres Salomon
     
  • d5d8c5976   freezer: do not send signals to kernel threads ... Browse Code »

    The freezer should not send signals to kernel threads, since that may lead to
    subtle problems. In particular, commit
    b74d0deb968e1f85942f17080eace015ce3c332c has changed recalc_sigpending_tsk()
    so that it doesn't clear TIF_SIGPENDING. For this reason, if the freezer
    continues to send fake signals to kernel threads and the freezing of kernel
    threads fails, some of them may be running with TIF_SIGPENDING set forever.

    Accordingly, recalc_sigpending_tsk() shouldn't set the task's TIF_SIGPENDING
    flag if TIF_FREEZE is set.

    Signed-off-by: Rafael J. Wysocki
    Cc: Nigel Cunningham
    Cc: Pavel Machek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     
  • 277636537   freezer: document relationship with memory shrinking ... Browse Code »

    One important reason to freeze tasks, which is that we don't want them to
    allocate memory after freeing it for the hibernation image, has not been
    documented. Fix it.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Acked-by: Nigel Cunningham
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     
  • 26398a70e   PM: Rename struct pm_ops and related things ... Browse Code »

    The name of 'struct pm_ops' suggests that it is related to the power
    management in general, but in fact it is only related to suspend.  Moreover,
    its name should indicate what this structure is used for, so it seems
    reasonable to change it to 'struct platform_suspend_ops'.  In that case, the
    name of the global variable of this type used by the PM core and the names of
    related functions should be changed accordingly.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Cc: Len Brown
    Cc: Greg KH
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     

17 Oct, 2007

2 commits

22 Jul, 2007

1 commit

20 Jul, 2007

1 commit

  • b10d91174   PM: introduce hibernation and suspend notifiers ... Browse Code »

    Make it possible to register hibernation and suspend notifiers, so that
    subsystems can perform hibernation-related or suspend-related operations that
    should not be carried out by device drivers' .suspend() and .resume()
    routines.

    [akpm@linux-foundation.org: build fixes]
    [akpm@linux-foundation.org: cleanups]
    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Cc: Nigel Cunningham
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     

18 Jul, 2007

1 commit

  • 831441862   Freezer: make kernel threads nonfreezable by default ... Browse Code »

    Currently, the freezer treats all tasks as freezable, except for the kernel
    threads that explicitly set the PF_NOFREEZE flag for themselves. This
    approach is problematic, since it requires every kernel thread to either
    set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
    care for the freezing of tasks at all.

    It seems better to only require the kernel threads that want to or need to
    be frozen to use some freezer-related code and to remove any
    freezer-related code from the other (nonfreezable) kernel threads, which is
    done in this patch.

    The patch causes all kernel threads to be nonfreezable by default (ie. to
    have PF_NOFREEZE set by default) and introduces the set_freezable()
    function that should be called by the freezable kernel threads in order to
    unset PF_NOFREEZE. It also makes all of the currently freezable kernel
    threads call set_freezable(), so it shouldn't cause any (intentional)
    change of behaviour to appear. Additionally, it updates documentation to
    describe the freezing of tasks more accurately.

    [akpm@linux-foundation.org: build fixes]
    Signed-off-by: Rafael J. Wysocki
    Acked-by: Nigel Cunningham
    Cc: Pavel Machek
    Cc: Oleg Nesterov
    Cc: Gautham R Shenoy
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     

13 Jul, 2007

1 commit

  • 0458d5b4c   USB: add USB-Persist facility ... Browse Code »

    This patch (as886) adds the controversial USB-persist facility,
    allowing USB devices to persist across a power loss during system
    suspend.

    The facility is controlled by a new Kconfig option (with appropriate
    warnings about the potential dangers); when the option is off the
    behavior will remain the same as it is now. But when the option is
    on, people will be able to use suspend-to-disk and keep their USB
    filesystems intact -- something particularly valuable for small
    machines where the root filesystem is on a USB device!

    Signed-off-by: Alan Stern
    Signed-off-by: Greg Kroah-Hartman

    Alan Stern
     

12 Jul, 2007

1 commit

  • 56906c612   PCI: remove useless pci driver method ... Browse Code »

    Remove pointless and never-called enable_wake() hook from pci_driver and
    from documentation. Evidently this was introduced in the 2.4.6 kernel,
    but there's no evidence it was ever called; and it was rarely implemented.

    Signed-off-by: David Brownell
    Signed-off-by: Greg Kroah-Hartman

    David Brownell
     

10 May, 2007

2 commits

  • 9a9136e27   Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial ... Browse Code »

    * git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (25 commits)
    sound: convert "sound" subdirectory to UTF-8
    MAINTAINERS: Add cxacru website/mailing list
    include files: convert "include" subdirectory to UTF-8
    general: convert "kernel" subdirectory to UTF-8
    documentation: convert the Documentation directory to UTF-8
    Convert the toplevel files CREDITS and MAINTAINERS to UTF-8.
    remove broken URLs from net drivers' output
    Magic number prefix consistency change to Documentation/magic-number.txt
    trivial: s/i_sem /i_mutex/
    fix file specification in comments
    drivers/base/platform.c: fix small typo in doc
    misc doc and kconfig typos
    Remove obsolete fat_cvf help text
    Fix occurrences of "the the "
    Fix minor typoes in kernel/module.c
    Kconfig: Remove reference to external mqueue library
    Kconfig: A couple of grammatical fixes in arch/i386/Kconfig
    Correct comments in genrtc.c to refer to correct /proc file.
    Fix more "deprecated" spellos.
    Fix "deprecated" typoes.
    ...

    Fix trivial comment conflict in kernel/relay.c.

    Linus Torvalds
     
  • a3d25c275   PM: Separate hibernation code from suspend code ... Browse Code »

    [ With Johannes Berg ]

    Separate the hibernation (aka suspend to disk code) from the other suspend
    code. In particular:

    * Remove the definitions related to hibernation from include/linux/pm.h
    * Introduce struct hibernation_ops and a new hibernate() function to hibernate
    the system, defined in include/linux/suspend.h
    * Separate suspend code in kernel/power/main.c from hibernation-related code
    in kernel/power/disk.c and kernel/power/user.c (with the help of
    hibernation_ops)
    * Switch ACPI (the only user of pm_ops.pm_disk_mode) to hibernation_ops

    Signed-off-by: Rafael J. Wysocki
    Cc: Greg KH
    Cc: Pavel Machek
    Cc: Nigel Cunningham
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     

09 May, 2007

2 commits

08 May, 2007

1 commit

  • f0ced9b22   power management: change /sys/power/disk display ... Browse Code »

    Change /sys/power/disk to display all valid modes as well as the currently
    selected one in a fashion known from the LED subsystem.

    This changes userspace API, but it is apparently not used much (we asked
    some userspace developers)

    Signed-off-by: Johannes Berg
    Acked-by: "Rafael J. Wysocki"
    Acked-by: Pavel Machek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Johannes Berg
     

03 May, 2007

1 commit

01 May, 2007

1 commit

  • 11d77d0c0   power management: remove firmware disk mode ... Browse Code »

    This patch removes the firmware disk suspend mode which is the wrong approach,
    it is supposed to be used for implementing firmware-based disk suspend but
    cannot actually be used for that.

    Signed-off-by: Johannes Berg
    Acked-by: Pavel Machek
    Cc:
    Cc: David Brownell
    Cc: Len Brown
    Acked-by: Russell King
    Cc: Greg KH
    Cc: "Rafael J. Wysocki"
    Cc: Paul Mundt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Johannes Berg
     

27 Mar, 2007

1 commit

08 Dec, 2006

3 commits

30 Nov, 2006

2 commits

04 Nov, 2006

1 commit

  • b918f6e62   [PATCH] swsusp: debugging ... Browse Code »

    Add a swsusp debugging mode. This does everything that's needed for a suspend
    except for actually suspending. So we can look in the log messages and work
    out a) what code is being slow and b) which drivers are misbehaving.

    (1)
    # echo testproc > /sys/power/disk
    # echo disk > /sys/power/state

    This should turn off the non-boot CPU, freeze all processes, wait for 5
    seconds and then thaw the processes and the CPU.

    (2)
    # echo test > /sys/power/disk
    # echo disk > /sys/power/state

    This should turn off the non-boot CPU, freeze all processes, shrink
    memory, suspend all devices, wait for 5 seconds, resume the devices etc.

    Cc: Pavel Machek
    Cc: Stefan Seyfried
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     

04 Oct, 2006

5 commits

27 Sep, 2006

1 commit

  • dd77a4ee0   Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 ... Browse Code »

    * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (47 commits)
    Driver core: Don't call put methods while holding a spinlock
    Driver core: Remove unneeded routines from driver core
    Driver core: Fix potential deadlock in driver core
    PCI: enable driver multi-threaded probe
    Driver Core: add ability for drivers to do a threaded probe
    sysfs: add proper sysfs_init() prototype
    drivers/base: check errors
    drivers/base: Platform notify needs to occur before drivers attach to the device
    v4l-dev2: handle __must_check
    add CONFIG_ENABLE_MUST_CHECK
    add __must_check to device management code
    Driver core: fixed add_bind_files() definition
    Driver core: fix comments in drivers/base/power/resume.c
    sysfs_remove_bin_file: no return value, dump_stack on error
    kobject: must_check fixes
    Driver core: add ability for devices to create and remove bin files
    Class: add support for class interfaces for devices
    Driver core: create devices/virtual/ tree
    Driver core: add device_rename function
    Driver core: add ability for classes to handle devices properly
    ...

    Linus Torvalds
     

26 Sep, 2006

2 commits

  • c5c6ba4e0   [PATCH] PM: Add pm_trace switch ... Browse Code »

    Add the pm_trace attribute in /sys/power which has to be explicitly set to
    one to really enable the "PM tracing" code compiled in when CONFIG_PM_TRACE
    is set (which modifies the machine's CMOS clock in unpredictable ways).

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     
  • 4fc084000   updated Documentation/power/devices.txt ... Browse Code »

    This turned into a rewrite of Documentation/power/devices.txt:

    - Provide more of the "big picture"

    - Fixup some of the horribly ancient/obsolete description of device suspend()
    semantics; lots of text just got deleted.

    - Add a decent description of PM_EVENT_* codes, including the new PRETHAW code
    needed in some swsusp scenarios.

    - Describe the new PM factorization from Linus:
    * class suspend, current suspend, then suspend_late
    * NOT suspend_prepare, it wasn't really usable
    * resume_early, current resume, class resume.

    - Updates power/state docs to be correct, and deprecate its usage except for
    driver testing.

    Signed-off-by: David Brownell
    Signed-off-by: Greg Kroah-Hartman

    David Brownell
     

23 Jun, 2006

1 commit

22 Jun, 2006

2 commits

28 Apr, 2006

1 commit

  • 9587c4bf7   [PATCH] suspend: Documentation update for IBM Thinkpad X30 ... Browse Code »

    As reported in Bugzilla Bug 6406, resume from S3 results in a blank screen.

    For the IBM Thinkpad X30 using vesafb as the console driver, successful resume
    from S3 requires option acpi_sleep=s3_bios,s3_mode. Update documentation.

    I would presume that, in any hardware, using vesafb as the console driver will
    require as a minimum s3_mode.

    Signed-off-by: Antonino Daplas
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Antonino A. Daplas
     

23 Mar, 2006

2 commits

  • 6e1819d61   [PATCH] swsusp: userland interface ... Browse Code »

    This patch introduces a user space interface for swsusp.

    The interface is based on a special character device, called the snapshot
    device, that allows user space processes to perform suspend and resume-related
    operations with the help of some ioctls and the read()/write() functions.
     Additionally it allows these processes to allocate free swap pages from a
    selected swap partition, called the resume partition, so that they know which
    sectors of the resume partition are available to them.

    The interface uses the same low-level system memory snapshot-handling
    functions that are used by the built-it swap-writing/reading code of swsusp.

    The interface documentation is included in the patch.

    The patch assumes that the major and minor numbers of the snapshot device will
    be 10 (ie. misc device) and 231, the registration of which has already been
    requested.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     
  • 543cc27d0   [PATCH] swsusp: documentation updates ... Browse Code »

    Update suspend-to-RAM documentation with new machines, and makes message
    when processes can't be stopped little clearer. (In one case, waiting
    longer actually did help).

    From: "Rafael J. Wysocki"

    Warn in the documentation that data may be lost if there are some
    filesystems mounted from USB devices before suspend.

    [Thanks to Alan Stern for providing the answer to the question in the
    Q:-A: part.]

    Signed-off-by: Pavel Machek
    Signed-off-by: Rafael J. Wysocki
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pavel Machek
     

02 Feb, 2006

1 commit