Eric Lee / smarc-fsl-linux-kernel

21 Jun, 2008

1 commit

15 Feb, 2007

1 commit

  • cd354f1ae   [PATCH] remove many unneeded #includes of sched.h ... Browse Code »

    After Al Viro (finally) succeeded in removing the sched.h #include in module.h
    recently, it makes sense again to remove other superfluous sched.h includes.
    There are quite a lot of files which include it but don't actually need
    anything defined in there. Presumably these includes were once needed for
    macros that used to live in sched.h, but moved to other header files in the
    course of cleaning it up.

    To ease the pain, this time I did not fiddle with any header files and only
    removed #includes from .c-files, which tend to cause less trouble.

    Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
    arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
    allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
    configs in arch/arm/configs on arm. I also checked that no new warnings were
    introduced by the patch (actually, some warnings are removed that were emitted
    by unnecessarily included header files).

    Signed-off-by: Tim Schmielau
    Acked-by: Russell King
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Tim Schmielau
     

23 Jan, 2007

1 commit

  • 79603a350   [PATCH] tlclk: bug fix + misc fixes ... Browse Code »

    The following patch fixes a few problems with the tlclk driver.
    * bug in the select_amcb1_transmit_clock
    * racy read sys call
    * racy open sys call
    * use of add_timer where mod_timer would be better
    * change to the timer data parameter use

    Signed-off-by: Mark Gross
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Mark Gross
     

23 Dec, 2006

1 commit

26 Nov, 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
     

04 Jul, 2006

1 commit

  • 62322d255   [PATCH] make more file_operation structs static ... Browse Code »

    Mark the static struct file_operations in drivers/char as const. Making
    them const prevents accidental bugs, and moves them to the .rodata section
    so that they no longer do any false sharing; in addition with the proper
    debug option they are then protected against corruption..

    [akpm@osdl.org: build fix]
    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

03 Jul, 2006

1 commit

01 Jul, 2006

1 commit

27 Jun, 2006

1 commit

  • a09ab7e2f   [PATCH] type-oh bug in tlclk.c ... Browse Code »

    Mark Bellon found a bug in my tlclk driver. Thanks!

    I botch the register mask for store_received_ref_clk3a.

    See http://download.intel.com/design/network/manuals/30412001.pdf
    tables 124 and 136 for details.

    Signed-off-by: Mark Gross
    Signed-off-by: Linus Torvalds

    mark gross
     

11 Apr, 2006

1 commit

  • 31cc48bfe   [PATCH] MPBL0010 driver sysfs permissions wide open ... Browse Code »

    The MPBL0010 Telco clock driver (drivers/char/tlclk.c) uses 0222 (anyone
    can write) permissions on its writable sysfs entries. Alter the
    permissions to 0220 (owner and group can write).

    The use case for this driver is to configure the fail over behavior of the
    clock hardware. That should be done by the more privileged users.

    Signed-off-by: Mark Bellon
    Acked-by: "Gross, Mark"
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Mark Bellon
     

27 Mar, 2006

1 commit

  • 222b9f933   [PATCH] tlclk: fix handling of device major ... Browse Code »

    tlclk calls register_chrdev() and permits register_chrdev() to allocate the
    major, but it promptly forgets what that major was. So if there's no hardware
    present you still get "telco_clock" appearing in /proc/devices and, I assume,
    an oops reading /proc/devices if tlclk was a module.

    Fix.

    Mark, I'd suggest that that we not call register_chrdev() until _after_ we've
    established that the hardware is present.

    Cc: Mark Gross
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     

19 Jan, 2006

1 commit

12 Jan, 2006

1 commit

02 Nov, 2005

1 commit

  • ce4633704   [PATCH] tlclk build fix ... Browse Code »

    drivers/char/tlclk.c: In function `tlclk_init':
    drivers/char/tlclk.c:775: warning: implicit declaration of function `platform_device_register_simple'

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

    Andrew Morton
     

31 Oct, 2005

1 commit