Eric Lee / smarc-fsl-linux-kernel

03 May, 2008

1 commit

25 Apr, 2008

1 commit

  • e19166d5d   [SCSI] aha152x, eata, u14-34f: minor irq handler cleanups ... Browse Code »

    - remove pointless casts from void*

    - remove needless references to 'irq' function argument, when that
    information is already stored somewhere in a driver-private struct.

    - where the 'irq' function argument is known never to be used, rename
    it to 'dummy' to make this more obvious

    - remove always-false tests for dev_id==NULL

    - remove always-true tests for 'irq == host_struct->irq'

    - replace per-irq lookup functions and tables with a direct reference
    to data object obtained via 'dev_id' function argument, passed from
    request_irq()

    This change's main purpose is to prepare for the patchset in
    jgarzik/misc-2.6.git#irq-remove, that explores removal of the
    never-used 'irq' argument in each interrupt handler.

    Signed-off-by: Jeff Garzik
    Signed-off-by: James Bottomley

    Jeff Garzik
     

08 Feb, 2008

1 commit

  • d6a451dd4   [SCSI] u14-34f: fix data direction bug ... Browse Code »

    Direction of data transfer 'DMA_FROM_DEVICE' was tested twice. DTD_OUT
    means transfer from host to device. This should occur when the
    direction of data transfer (sc_data_direction) is 'DMA_TO_DEVICE'.

    Signed-off-by: Roel Kluin
    Signed-off-by: James Bottomley

    Roel Kluin
     

31 Jan, 2008

1 commit

  • d3f46f39b   [SCSI] remove use_sg_chaining ... Browse Code »

    With the sg table code, every SCSI driver is now either chain capable
    or broken (or has sg_tablesize set so chaining is never activated), so
    there's no need to have a check in the host template.

    Also tidy up the code by moving the scatterlist size defines into the
    SCSI includes and permit the last entry of the scatterlist pools not
    to be a power of two.
    Signed-off-by: James Bottomley

    James Bottomley
     

24 Jan, 2008

1 commit

16 Oct, 2007

2 commits

13 Oct, 2007

1 commit

  • 12a441622   [SCSI] Remove ->pid field from scsi_cmnd ... Browse Code »

    The pid field is a duplicate of the serial_number field and has been
    scheduled for removal for a long time. A few drivers were still using
    it, so just change them to use serial_number instead.

    Signed-off-by: Matthew Wilcox
    Signed-off-by: James Bottomley

    Matthew Wilcox
     

27 May, 2007

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
     

03 Jul, 2006

1 commit

01 Jul, 2006

1 commit

10 Nov, 2005

1 commit

07 Nov, 2005

1 commit

  • c9475cb0c   [PATCH] kfree cleanup: drivers/scsi ... Browse Code »

    This is the drivers/scsi/ part of the big kfree cleanup patch.

    Remove pointless checks for NULL prior to calling kfree() in drivers/scsi/.

    Signed-off-by: Jesper Juhl
    Cc: James Bottomley
    Acked-by: Kai Makisara
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jesper Juhl
     

29 Oct, 2005

2 commits

27 Jun, 2005

1 commit

18 Jun, 2005

2 commits

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