Eric Lee / smarc-fsl-linux-kernel

12 Jan, 2008

2 commits

24 Oct, 2007

1 commit

23 Oct, 2007

1 commit

13 Oct, 2007

2 commits

04 Jun, 2007

1 commit

05 May, 2007

4 commits

  • b312b38c7   m68k: Atari SCSI workqueue updates ... Browse Code »

    Workqueue updates for the Atari SCSI driver

    Signed-off-by: Geert Uytterhoeven
    Signed-off-by: Linus Torvalds

    Geert Uytterhoeven
     
  • 3130d905b   m68k: Atari SCSI driver compile fixes ... Browse Code »

    Atari SCSI driver compile fixes

    Signed-off-by: Roman Zippel
    Signed-off-by: Geert Uytterhoeven
    Signed-off-by: Linus Torvalds

    Roman Zippel
     
  • c28bda251   m68k: Reformat the Atari SCSI driver ... Browse Code »

    Reformat the Atari SCSI driver

    Signed-off-by: Roman Zippel
    Signed-off-by: Geert Uytterhoeven
    Signed-off-by: Linus Torvalds

    Roman Zippel
     
  • fb810d121   m68k: Atari SCSI revival ... Browse Code »

    SCSI should be working on a TT (but someone should really try!) but causes
    trouble on a Falcon (as in: it ate a filesystem of mine) at least when
    used concurrently with IDE. I have the notion it's because locking of the
    ST-DMA interrupt by IDE is broken in 2.6 (the IDE driver always complains
    about trying to release an already-released ST-DMA). Needs more work, but
    that's on the IDE or m68k interrupt side rather than SCSI.

    Signed-off-by: Michael Schmitz
    Signed-off-by: Roman Zippel
    Signed-off-by: Geert Uytterhoeven
    Signed-off-by: Linus Torvalds

    Michael Schmitz
     

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
     

14 Jul, 2006

1 commit

01 Jul, 2006

1 commit

16 Dec, 2005

1 commit

10 Nov, 2005

1 commit

19 Apr, 2005

1 commit

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