Eric Lee / smarc-fsl-linux-kernel

13 Jul, 2009

1 commit

  • 405f55712   headers: smp_lock.h redux ... Browse Code »

    * Remove smp_lock.h from files which don't need it (including some headers!)
    * Add smp_lock.h to files which do need it
    * Make smp_lock.h include conditional in hardirq.h
    It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT

    This will make hardirq.h inclusion cheaper for every PREEMPT=n config
    (which includes allmodconfig/allyesconfig, BTW)

    Signed-off-by: Alexey Dobriyan
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

17 Jun, 2009

1 commit

23 Oct, 2008

2 commits

  • d6c479e0b   PCI: cpci_hotplug: stop managing hotplug_slot->name ... Browse Code »

    We no longer need to manage our version of hotplug_slot->name
    since the PCI and hotplug core manage it on our behalf.

    Now, we simply advise the PCI core of the name that we would
    like, and let the core take care of the rest.

    Cc: kristen.c.accardi@intel.com
    Cc: scottm@somanetworks.com
    Acked-by: Kenji Kaneshige
    Signed-off-by: Alex Chiang
    Signed-off-by: Jesse Barnes

    Alex Chiang
     
  • 1359f2701   PCI Hotplug core: add 'name' param pci_hp_register interface ... Browse Code »

    Update pci_hp_register() to take a const char *name parameter.

    The motivation for this is to clean up the individual hotplug
    drivers so that each one does not have to manage its own name.
    The PCI core should be the place where we manage the name.

    We update the interface and all callsites first, in a
    "no functional change" manner, and clean up the drivers later.

    Cc: kristen.c.accardi@intel.com
    Acked-by: Kenji Kaneshige
    Reviewed-by: Matthew Wilcox
    Signed-off-by: Alex Chiang
    Signed-off-by: Jesse Barnes

    Alex Chiang
     

11 Jun, 2008

1 commit

  • f46753c5e   PCI: introduce pci_slot ... Browse Code »

    Currently, /sys/bus/pci/slots/ only exposes hotplug attributes when a
    hotplug driver is loaded, but PCI slots have attributes such as address,
    speed, width, etc. that are not related to hotplug at all.

    Introduce pci_slot as the primary data structure and kobject model.
    Hotplug attributes described in hotplug_slot become a secondary
    structure associated with the pci_slot.

    This patch only creates the infrastructure that allows the separation of
    PCI slot attributes and hotplug attributes. In this patch, the PCI
    hotplug core remains the only user of this infrastructure, and thus,
    /sys/bus/pci/slots/ will still only become populated when a hotplug
    driver is loaded.

    A later patch in this series will add a second user of this new
    infrastructure and demonstrate splitting the task of exposing pci_slot
    attributes from hotplug_slot attributes.

    - Make pci_slot the primary sysfs entity. hotplug_slot becomes a
    subsidiary structure.
    o pci_create_slot() creates and registers a slot with the PCI core
    o pci_slot_add_hotplug() gives it hotplug capability

    - Change the prototype of pci_hp_register() to take the bus and
    slot number (on parent bus) as parameters.

    - Remove all the ->get_address methods since this functionality is
    now handled by pci_slot directly.

    [achiang@hp.com: rpaphp-correctly-pci_hp_register-for-empty-pci-slots]
    Tested-by: Badari Pulavarty
    Acked-by: Benjamin Herrenschmidt
    [akpm@linux-foundation.org: build fix]
    [akpm@linux-foundation.org: make headers_check happy]
    [akpm@linux-foundation.org: nuther build fix]
    [akpm@linux-foundation.org: fix typo in #include]
    Signed-off-by: Alex Chiang
    Signed-off-by: Matthew Wilcox
    Cc: Greg KH
    Cc: Kristen Carlson Accardi
    Cc: Len Brown
    Acked-by: Kenji Kaneshige
    Signed-off-by: Andrew Morton
    Signed-off-by: Jesse Barnes

    Alex Chiang
     

21 Apr, 2008

1 commit

12 Jul, 2007

1 commit

19 Oct, 2006

1 commit

05 Oct, 2006

1 commit

  • 7d12e780e   IRQ: Maintain regs pointer globally rather than passing to IRQ handlers ... Browse Code »

    Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
    of passing regs around manually through all ~1800 interrupt handlers in the
    Linux kernel.

    The regs pointer is used in few places, but it potentially costs both stack
    space and code to pass it around. On the FRV arch, removing the regs parameter
    from all the genirq function results in a 20% speed up of the IRQ exit path
    (ie: from leaving timer_interrupt() to leaving do_IRQ()).

    Where appropriate, an arch may override the generic storage facility and do
    something different with the variable. On FRV, for instance, the address is
    maintained in GR28 at all times inside the kernel as part of general exception
    handling.

    Having looked over the code, it appears that the parameter may be handed down
    through up to twenty or so layers of functions. Consider a USB character
    device attached to a USB hub, attached to a USB controller that posts its
    interrupts through a cascaded auxiliary interrupt controller. A character
    device driver may want to pass regs to the sysrq handler through the input
    layer which adds another few layers of parameter passing.

    I've build this code with allyesconfig for x86_64 and i386. I've runtested the
    main part of the code on FRV and i386, though I can't test most of the drivers.
    I've also done partial conversion for powerpc and MIPS - these at least compile
    with minimal configurations.

    This will affect all archs. Mostly the changes should be relatively easy.
    Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

    struct pt_regs *old_regs = set_irq_regs(regs);

    And put the old one back at the end:

    set_irq_regs(old_regs);

    Don't pass regs through to generic_handle_irq() or __do_IRQ().

    In timer_interrupt(), this sort of change will be necessary:

    - update_process_times(user_mode(regs));
    - profile_tick(CPU_PROFILING, regs);
    + update_process_times(user_mode(get_irq_regs()));
    + profile_tick(CPU_PROFILING);

    I'd like to move update_process_times()'s use of get_irq_regs() into itself,
    except that i386, alone of the archs, uses something other than user_mode().

    Some notes on the interrupt handling in the drivers:

    (*) input_dev() is now gone entirely. The regs pointer is no longer stored in
    the input_dev struct.

    (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
    something different depending on whether it's been supplied with a regs
    pointer or not.

    (*) Various IRQ handler function pointers have been moved to type
    irq_handler_t.

    Signed-Off-By: David Howells
    (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

    David Howells
     

03 Jul, 2006

1 commit

01 Jul, 2006

1 commit

24 Mar, 2006

1 commit

09 Jun, 2005

1 commit

01 Jun, 2005

1 commit

  • bcc488ab0   [PATCH] PCI Hotplug: more CPCI updates ... Browse Code »

    Here is my third attempt at a patch to further update the CompactPCI
    hotplug driver infrastructure to address the pci_enable_device issue
    discussed on the list as well as a few other issues I discovered during
    some more testing. This version addresses a few more issues pointed out
    by Prarit Bhargava. Changes include:
    - cpci_enable_device and its recursive calling of pci_enable_device on
    new devices removed.
    - Use list_rwsem to avoid slot status change races between disable_slot
    and check_slots.
    - Fixed oopsing in cpci_hp_unregister_bus caused by calling list_del on
    a slot after calling pci_hp_deregister.
    - Removed kfree calls in cleanup_slots since release_slot will have
    done it already.
    - Reworked init_slots a bit to fix latch and adapter file updating on
    subsequent calls to cpci_hp_start.
    - Improved sanity checking in cpci_hp_register_controller.
    - Now shut things down correctly in cpci_hotplug_exit.
    - Switch to pci_get_slot instead of deprecated pci_find_slot.
    - A bunch of CodingStyle fixes.

    Signed-off-by: Scott Murray
    Signed-off-by: Greg Kroah-Hartman

    Scott Murray
     

18 May, 2005

1 commit

  • 43b7d7cfb   [PATCH] PCI Hotplug: CPCI update ... Browse Code »

    [PATCH] CPCI: update

    I have finally done some work to update the CompactPCI hotplug driver to
    fix some of the outstanding issues in 2.6:
    - Added adapter and latch status ops so that those files will get created
    by the current PCI hotplug core. This used to not be required, but
    seems to be now after some of the sysfs rework in the core.
    - Replaced slot list spinlock with a r/w semaphore to avoid any potential
    issues with sleeping. This quiets all of the runtime warnings.
    - Reworked interrupt driven hot extraction handling to remove need for a
    polling operator for ENUM# status. There are a lot of boards that only
    have an interrupt driven by ENUM#, so this lowers the bar to entry.
    - Replaced pci_visit_dev usage with better use of the PCI core functions.
    The new code is functionally equivalent to the previous code, but the
    use of pci_enable_device on insert needs to be investigated further, as
    I need to do some more testing to see if it is still necessary.

    Signed-off-by: Scott Murray
    Signed-off-by: Greg Kroah-Hartman

    Scott Murray
     

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    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!

    Linus Torvalds