Eric Lee / smarc-fsl-linux-kernel

20 Aug, 2010

1 commit

13 Jun, 2009

1 commit

  • 1dc492a0a   trivial: kernel/power/poweroff.c: whitespace fix ... Browse Code »

    Fix coding style whitespace fixes. Patch compile tested
    Before :-
    total: 1 errors, 0 warnings, 46 lines checked
    After
    total: 0 errors, 0 warnings, 46 lines checked

    Before :-
    text data bss dec hex filename
    107 48 0 155 9b kernel/power/poweroff.o
    After
    text data bss dec hex filename
    107 48 0 155 9b kernel/power/poweroff.o

    Signed-off-by: Manish Katiyar
    Signed-off-by: Jiri Kosina

    Manish Katiyar
     

01 Jan, 2009

1 commit

  • 41c7bb958   cpumask: convert rest of files in kernel/ ... Browse Code »

    Impact: Reduce stack usage, use new cpumask API.

    Mainly changing cpumask_t to 'struct cpumask' and similar simple API
    conversion. Two conversions worth mentioning:

    1) we use cpumask_any_but to avoid a temporary in kernel/softlockup.c,
    2) Use cpumask_var_t in taskstats_user_cmd().

    Signed-off-by: Rusty Russell
    Signed-off-by: Mike Travis
    Cc: Balbir Singh
    Cc: Ingo Molnar

    Rusty Russell
     

25 Jul, 2008

1 commit

  • 2f15fc4bd   pm: schedule sysrq poweroff on boot cpu ... Browse Code »

    schedule sysrq poweroff on boot cpu.

    sysrq poweroff needs to disable nonboot cpus, and we need to run this on boot
    cpu to avoid any recursion. http://bugzilla.kernel.org/show_bug.cgi?id=10897

    [kosaki.motohiro@jp.fujitsu.com: build fix]
    Signed-off-by: Zhang Rui
    Tested-by: Rus
    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Signed-off-by: KOSAKI Motohiro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Zhang Rui
     

22 Nov, 2006

1 commit

  • 65f27f384   WorkStruct: Pass the work_struct pointer instead of context data ... Browse Code »

    Pass the work_struct pointer to the work function rather than context data.
    The work function can use container_of() to work out the data.

    For the cases where the container of the work_struct may go away the moment the
    pending bit is cleared, it is made possible to defer the release of the
    structure by deferring the clearing of the pending bit.

    To make this work, an extra flag is introduced into the management side of the
    work_struct. This governs auto-release of the structure upon execution.

    Ordinarily, the work queue executor would release the work_struct for further
    scheduling or deallocation by clearing the pending bit prior to jumping to the
    work function. This means that, unless the driver makes some guarantee itself
    that the work_struct won't go away, the work function may not access anything
    else in the work_struct or its container lest they be deallocated.. This is a
    problem if the auxiliary data is taken away (as done by the last patch).

    However, if the pending bit is *not* cleared before jumping to the work
    function, then the work function *may* access the work_struct and its container
    with no problems. But then the work function must itself release the
    work_struct by calling work_release().

    In most cases, automatic release is fine, so this is the default. Special
    initiators exist for the non-auto-release case (ending in _NAR).

    Signed-Off-By: David Howells

    David Howells
     

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
     

27 Jul, 2005

1 commit

  • ff3197778   [PATCH] Use kernel_power_off in sysrq-o ... Browse Code »

    We already do all of the gymnastics to run from process context
    to call the power off code so call into the power off code cleanly.

    This especially helps acpi as part of it's shutdown logic should
    run acpi_shutdown called from device_shutdown which was not
    being called from here.

    Signed-off-by: Eric W. Biederman
    Signed-off-by: Linus Torvalds

    Eric W. Biederman
     

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