Eric Lee / smarc-fsl-linux-kernel

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
     

13 Jul, 2006

1 commit

03 Jul, 2006

1 commit

28 Jun, 2006

1 commit

23 Jun, 2006

2 commits

28 Apr, 2006

1 commit

22 Mar, 2006

2 commits

22 Jan, 2006

2 commits

03 Jan, 2006

1 commit

11 Nov, 2005

2 commits

29 Oct, 2005

1 commit

  • 4153812fc   [PATCH] pci_ids: macros: replace partial with whole symbols ... Browse Code »

    pci_ids cleanup: replace symbols built by macros with whole symbols to
    aid grep searches.

    Signed-off-by: Grant Coady
    Signed-off-by: Greg Kroah-Hartman

    drivers/video/cirrusfb.c | 24 ++++++++++++------------
    sound/oss/ymfpci.c | 17 +++++++++--------
    sound/pci/bt87x.c | 11 +++++++----
    3 files changed, 28 insertions(+), 24 deletions(-)

    Grant Coady
     

12 Sep, 2005

3 commits

  • 3bcd4649b   [ALSA] set owner field in struct pci_driver ... Browse Code »

    AD1889 driver,ALS4000 driver,ATIIXP driver,ATIIXP-modem driver
    AZT3328 driver,BT87x driver,CMIPCI driver,CS4281 driver
    ENS1370/1+ driver,ES1938 driver,ES1968 driver,FM801 driver
    Intel8x0 driver,Intel8x0-modem driver,Maestro3 driver,RME32 driver
    RME96 driver,SonicVibes driver,VIA82xx driver,VIA82xx-modem driver
    ALI5451 driver,au88x0 driver,CS46xx driver,EMU10K1/EMU10K2 driver
    HDA Intel driver,ICE1712 driver,ICE1724 driver,KORG1212 driver
    MIXART driver,NM256 driver,RME HDSP driver,RME9652 driver
    Trident driver,Digigram VX222 driver,YMFPCI driver
    Set the module owner field in each driver's struct pci_driver to get
    the driver symlink in the sysfs device directory.

    Signed-off-by: Clemens Ladisch

    Clemens Ladisch
     
  • e560d8d83   [ALSA] Replace with kzalloc() - pci stuff ... Browse Code »

    AD1889 driver,ATIIXP driver,ATIIXP-modem driver,AZT3328 driver
    BT87x driver,CMIPCI driver,CS4281 driver,ENS1370/1+ driver
    ES1938 driver,ES1968 driver,FM801 driver,Intel8x0 driver
    Intel8x0-modem driver,Maestro3 driver,SonicVibes driver,VIA82xx driver
    VIA82xx-modem driver,AC97 Codec,AK4531 codec,au88x0 driver
    CA0106 driver,CS46xx driver,EMU10K1/EMU10K2 driver,HDA Codec driver
    HDA generic driver,HDA Intel driver,ICE1712 driver,ICE1724 driver
    KORG1212 driver,MIXART driver,NM256 driver,Trident driver,YMFPCI driver
    Replace kcalloc(1,..) with kzalloc().

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     
  • 8cdfd2519   [ALSA] Remove superfluous PCI ID definitions ... Browse Code »

    CS46xx driver,EMU10K1/EMU10K2 driver,PCM Midlevel,Trident driver
    YMFPCI driver,BT87x driver,CMIPCI driver,CS4281 driver
    ENS1370/1+ driver,ES1938 driver,ES1968 driver,Intel8x0 driver
    Intel8x0-modem driver,Maestro3 driver,RME32 driver,RME96 driver
    SonicVibes driver,VIA82xx driver,ALI5451 driver,ICE1712 driver
    ICE1724 driver,NM256 driver,RME HDSP driver,RME9652 driver
    Remove superfluous PCI ID definitions.

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     

07 Jul, 2005

2 commits

02 Jul, 2005

1 commit

  • 758658589   [PATCH] PCI: clean up dynamic pci id logic ... Browse Code »

    The dynamic pci id logic has been bothering me for a while, and now that
    I started to look into how to move some of this to the driver core, I
    thought it was time to clean it all up.

    It ends up making the code smaller, and easier to follow, and fixes a
    few bugs at the same time (dynamic ids were not being matched
    everywhere, and so could be missed on some call paths for new devices,
    semaphore not needed to be grabbed when adding a new id and calling the
    driver core, etc.)

    I also renamed the function pci_match_device() to pci_match_id() as
    that's what it really does.

    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

29 May, 2005

1 commit

  • 01d25d460   [ALSA] Replace pci_module_init() with pci_register_driver() ... Browse Code »

    Documentation,ALS4000 driver,ATIIXP driver,ATIIXP-modem driver
    AZT3328 driver,BT87x driver,CMIPCI driver,CS4281 driver
    ENS1370/1+ driver,ES1938 driver,ES1968 driver,FM801 driver
    Intel8x0 driver,Intel8x0-modem driver,Maestro3 driver,RME32 driver
    RME96 driver,SonicVibes driver,VIA82xx driver,VIA82xx-modem driver
    ALI5451 driver,au88x0 driver,CA0106 driver,CS46xx driver
    EMU10K1/EMU10K2 driver,HDA Intel driver,ICE1712 driver,ICE1724 driver
    KORG1212 driver,MIXART driver,NM256 driver,RME HDSP driver
    RME9652 driver,Trident driver,Digigram VX222 driver,YMFPCI driver
    Replace the obsolete pci_module_init() with pci_register_driver().

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     

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