Eric Lee / smarc-fsl-linux-kernel

15 Dec, 2011

1 commit

  • ca22e56de   driver-core: implement 'sysdev' functionality for regular devices and buses ... Browse Code »

    All sysdev classes and sysdev devices will converted to regular devices
    and buses to properly hook userspace into the event processing.

    There is no interesting difference between a 'sysdev' and 'device' which
    would justify to roll an entire own subsystem with different userspace
    export semantics. Userspace relies on events and generic sysfs subsystem
    infrastructure from sysdev devices, which are currently not properly
    available.

    Every converted sysdev class will create a regular device with the class
    name in /sys/devices/system and all registered devices will becom a children
    of theses devices.

    For compatibility reasons, the sysdev class-wide attributes are created
    at this parent device. (Do not copy that logic for anything new, subsystem-
    wide properties belong to the subsystem, not to some fake parent device
    created in /sys/devices.)

    Every sysdev driver is implemented as a simple subsystem interface now,
    and no longer called a driver.

    After all sysdev classes are ported to regular driver core entities, the
    sysdev implementation will be entirely removed from the kernel.

    Signed-off-by: Kay Sievers
    Signed-off-by: Greg Kroah-Hartman

    Kay Sievers
     

12 May, 2011

1 commit

  • 2e711c04d   PM: Remove sysdev suspend, resume and shutdown operations ... Browse Code »

    Since suspend, resume and shutdown operations in struct sysdev_class
    and struct sysdev_driver are not used any more, remove them. Also
    drop sysdev_suspend(), sysdev_resume() and sysdev_shutdown() used
    for executing those operations and modify all of their users
    accordingly. This reduces kernel code size quite a bit and reduces
    its complexity.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Greg Kroah-Hartman

    Rafael J. Wysocki
     

31 Mar, 2011

1 commit

24 Mar, 2011

1 commit

  • d47d81c0e   Introduce ARCH_NO_SYSDEV_OPS config option (v2) ... Browse Code »

    Introduce Kconfig option allowing architectures where sysdev
    operations used during system suspend, resume and shutdown have been
    completely replaced with struct sycore_ops operations to avoid
    building sysdev code that will never be used.

    Make callbacks in struct sys_device and struct sysdev_driver depend
    on ARCH_NO_SYSDEV_OPS to allows us to verify if all of the references
    have been actually removed from the code the given architecture
    depends on.

    Make x86 select ARCH_NO_SYSDEV_OPS.

    Signed-off-by: Rafael J. Wysocki

    Rafael J. Wysocki
     

04 Feb, 2011

2 commits

23 Oct, 2010

1 commit

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it 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.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    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
    file.

    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
    files.

    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
    necessary.

    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: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

08 Mar, 2010

3 commits

  • 52cf25d0a   Driver core: Constify struct sysfs_ops in struct kobj_type ... Browse Code »

    Constify struct sysfs_ops.

    This is part of the ops structure constification
    effort started by Arjan van de Ven et al.

    Benefits of this constification:

    * prevents modification of data that is shared
    (referenced) by many other structure instances
    at runtime

    * detects/prevents accidental (but not intentional)
    modification attempts on archs that enforce
    read-only kernel data at runtime

    * potentially better optimized code as the compiler
    can assume that the const data cannot be changed

    * the compiler/linker move const data into .rodata
    and therefore exclude them from false sharing

    Signed-off-by: Emese Revfy
    Acked-by: David Teigland
    Acked-by: Matt Domsch
    Acked-by: Maciej Sosnowski
    Acked-by: Hans J. Koch
    Acked-by: Pekka Enberg
    Acked-by: Jens Axboe
    Acked-by: Stephen Hemminger
    Signed-off-by: Greg Kroah-Hartman

    Emese Revfy
     
  • 38457ab3a   sysfs: Add attribute array to sysdev classes ... Browse Code »

    Add a attribute array that is automatically registered and unregistered
    to struct sysdev_class. This is similar to what struct class has.

    A lot of drivers add list of attributes, so it's better to do
    this easily in the common sysdev layer.

    This adds a new field to struct sysdev_class. I audited the
    whole tree and there are no dynamically allocated sysdev classes,
    so this is fully compatible.

    Signed-off-by: Andi Kleen
    Signed-off-by: Greg Kroah-Hartman

    Andi Kleen
     
  • c9be0a36f   sysdev: Pass attribute in sysdev_class attributes show/store ... Browse Code »

    Passing the attribute to the low level IO functions allows all kinds
    of cleanups, by sharing low level IO code without requiring
    an own function for every piece of data.

    Also drivers can extend the attributes with own data fields
    and use that in the low level function.

    Similar to sysdev_attributes and normal attributes.

    This is a tree-wide sweep, converting everything in one go.

    No functional changes in this patch other than passing the new
    argument everywhere.

    Tested on x86, the non x86 parts are uncompiled.

    Signed-off-by: Andi Kleen
    Signed-off-by: Greg Kroah-Hartman

    Andi Kleen
     

29 Jul, 2009

1 commit

16 Jun, 2009

2 commits

13 Jun, 2009

1 commit

04 Apr, 2009

1 commit

  • 811158b14   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial ... Browse Code »

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits)
    trivial: Update my email address
    trivial: NULL noise: drivers/mtd/tests/mtd_*test.c
    trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h
    trivial: Fix misspelling of "Celsius".
    trivial: remove unused variable 'path' in alloc_file()
    trivial: fix a pdlfush -> pdflush typo in comment
    trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL
    trivial: wusb: Storage class should be before const qualifier
    trivial: drivers/char/bsr.c: Storage class should be before const qualifier
    trivial: h8300: Storage class should be before const qualifier
    trivial: fix where cgroup documentation is not correctly referred to
    trivial: Give the right path in Documentation example
    trivial: MTD: remove EOL from MODULE_DESCRIPTION
    trivial: Fix typo in bio_split()'s documentation
    trivial: PWM: fix of #endif comment
    trivial: fix typos/grammar errors in Kconfig texts
    trivial: Fix misspelling of firmware
    trivial: cgroups: documentation typo and spelling corrections
    trivial: Update contact info for Jochen Hein
    trivial: fix typo "resgister" -> "register"
    ...

    Linus Torvalds
     

31 Mar, 2009

1 commit

  • 2ed8d2b3a   PM: Rework handling of interrupts during suspend-resume ... Browse Code »

    Use the functions introduced in by the previous patch,
    suspend_device_irqs(), resume_device_irqs() and check_wakeup_irqs(),
    to rework the handling of interrupts during suspend (hibernation) and
    resume. Namely, interrupts will only be disabled on the CPU right
    before suspending sysdevs, while device drivers will be prevented
    from receiving interrupts, with the help of the new helper function,
    before their "late" suspend callbacks run (and analogously during
    resume).

    In addition, since the device interrups are now disabled before the
    CPU has turned all interrupts off and the CPU will ACK the interrupts
    setting the IRQ_PENDING bit for them, check in sysdev_suspend() if
    any wake-up interrupts are pending and abort suspend if that's the
    case.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Ingo Molnar

    Rafael J. Wysocki
     

30 Mar, 2009

1 commit

25 Mar, 2009

1 commit

23 Feb, 2009

1 commit

30 Oct, 2008

2 commits

27 Jul, 2008

1 commit

  • f810a5cf2   Use WARN() in drivers/base/ ... Browse Code »

    Use WARN() instead of a printk+WARN_ON() pair; this way the message
    becomes part of the warning section for better reporting/collection.

    Signed-off-by: Arjan van de Ven
    Cc: Greg KH
    Cc: Kay Sievers
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

22 Jul, 2008

3 commits

  • 9800794ac   sysdev: Add utility functions for simple int/ulong variable sysdev attributes ... Browse Code »

    This adds a new sysdev_ext_attribute that stores a pointer to the variable
    it manages and some utility functions/macro to easily use them.

    Previously all users wrote custom macros to generate show/store
    functions for each variable, with this it is possible to avoid
    that in many cases.

    Signed-off-by: Andi Kleen
    Signed-off-by: Greg Kroah-Hartman

    Andi Kleen
     
  • 4a0b2b4db   sysdev: Pass the attribute to the low level sysdev show/store function ... Browse Code »

    This allow to dynamically generate attributes and share show/store
    functions between attributes. Right now most attributes are generated
    by special macros and lots of duplicated code. With the attribute
    passed it's instead possible to attach some data to the attribute
    and then use that in shared low level functions to do different things.

    I need this for the dynamically generated bank attributes in the x86
    machine check code, but it'll allow some further cleanups.

    I converted all users in tree to the new show/store prototype. It's a single
    huge patch to avoid unbisectable sections.

    Runtime tested: x86-32, x86-64
    Compiled only: ia64, powerpc
    Not compile tested/only grep converted: sh, arm, avr32

    Signed-off-by: Andi Kleen
    Signed-off-by: Greg Kroah-Hartman

    Andi Kleen
     
  • 838ea8e8d   sysdev: fix debugging statements in registration code. ... Browse Code »

    The systdev_class_register() and sysdev_register() functions have
    pr_debug() statements which are enabled when the user selects the
    driver core debug. Both of these routines do not produce the
    correct output, as they make assumptions about data which has not
    been initialised.

    In sysdev_class_register() the code uses the kobject_name(&cls->kset.kobj)
    at the start of the function, but this is not setup until later in the
    same call. Change this to use cls->name which is passed in from the caller.

    The sysdev_register() function tries to get the name of the sysdev by
    kobject_name(&sysdev->kobj), but that isn't setup until later in the same
    function so change this message to use the name of the sysdev's class and
    add another message once the name is initialised.

    Signed-off-by: Ben Dooks
    Signed-off-by: Greg Kroah-Hartman

    Ben Dooks
     

07 May, 2008

1 commit

20 Apr, 2008

2 commits

  • 2b3a302a0   driver core: replace remaining __FUNCTION__ occurrences ... Browse Code »

    __FUNCTION__ is gcc-specific, use __func__

    Signed-off-by: Harvey Harrison
    Signed-off-by: Greg Kroah-Hartman

    Harvey Harrison
     
  • da009f39f   sysdev: detect multiple driver registrations ... Browse Code »

    I've just found how easy it is to accidentally register a sysdev_driver for
    two different classes. When this happens, bad things happen as the
    sysdev_driver structure keeps has the list entry for the driver
    registration.

    The following patch makes a WARN_ON() if this happens, although I think
    BUG_ON or returning -EAGAIN could also be valid responses to this.

    Signed-off-by: Ben Dooks
    Cc: Kay Sievers
    Signed-off-by: Andrew Morton
    Signed-off-by: Greg Kroah-Hartman

    Ben Dooks
     

11 Mar, 2008

1 commit

25 Jan, 2008

6 commits

13 Oct, 2007

2 commits

  • 44b760a82   sysdev: remove global sysdev drivers list ... Browse Code »

    No one uses sysdev_drivers. Because no one calls sysdev_driver_register
    with NULL class.

    And it is difficult to imagine that someone want to implement a global
    sysdev driver which is called with all sys_device on any kind of
    sysdev_class.

    So this patch removes global sysdev_drivers list and update comments
    for this change.

    Signed-off-by: Akinobu Mita
    Cc: Tejun Heo
    Acked-by: Cornelia Huck
    Signed-off-by: Greg Kroah-Hartman

    Akinobu Mita
     
  • 27f20e5e4   Driver core: remove kset_set_kset_s ... Browse Code »

    This macro is only used by the driver core and is held over from when we
    had subsystems. It is not needed anymore.

    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

12 Jul, 2007

1 commit

03 May, 2007

1 commit