Eric Lee / smarc-fsl-linux-kernel

31 Mar, 2008

1 commit

07 Feb, 2008

1 commit

10 Feb, 2007

1 commit

06 Nov, 2006

1 commit

  • 18a61e4ad   [PATCH] Fix for LKDTM MEM_SWAPOUT crashpoint ... Browse Code »

    The MEM_SWAPOUT crashpoint in LKDTM could be broken as some compilers
    inline the call to shrink_page_list() and symbol lookup for this function
    name fails. Replacing it with the function shrink_inactive_list(), which
    is the only function calling shrink_page_list().

    Signed-off-by: Ankita Garg
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ankita Garg
     

04 Nov, 2006

1 commit

  • 5d861d920   [PATCH] lkdtm: cleanup headers and module_param/MODULE_PARM_DESC ... Browse Code »

    Fix module_param/sysfs file permission typo.

    Clean up MODULE_PARM_DESC strings to avoid fancy (and incorrect)
    formatting.

    Fix header includes for lkdtm; add some needed ones, remove unused ones;
    and fix this gcc warning:
    drivers/misc/lkdtm.c:150: warning: 'struct buffer_head' declared inside parameter list
    drivers/misc/lkdtm.c:150: warning: its scope is only this definition or declaration, which is probably not what you want

    Signed-off-by: Randy Dunlap
    Cc: Ankita Garg
    Cc: Vivek Goyal
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Randy Dunlap
     

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
     

02 Oct, 2006

1 commit

  • 8bb31b9d5   [PATCH] Linux Kernel Dump Test Module ... Browse Code »

    A simple module to test Linux Kernel Dump mechanism. This module uses
    jprobes to install/activate pre-defined crash points. At different crash
    points, various types of crashing scenarios are created like a BUG(),
    panic(), exception, recursive loop and stack overflow. The user can
    activate a crash point with specific type by providing parameters at the
    time of module insertion. Please see the file header for usage
    information. The module is based on the Linux Kernel Dump Test Tool by
    Fernando .

    This module could be merged with mainline. Jprobes is used here so that the
    context in which crash point is hit, could be maintained. This implements
    all the crash points as done by LKDTT except the one in the middle of
    tasklet_action().

    Signed-off-by: Ankita Garg
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ankita Garg