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
     

27 Sep, 2006

1 commit

  • 07563c711   [PATCH] EISA bus MODALIAS attributes support ... Browse Code »

    Add modalias attribute support for the almost forgotten now EISA bus and
    (at least some) EISA-aware modules.

    The modalias entry looks like (for an 3c509 NIC):

    eisa:sTCM5093

    and the in-module alias like:

    eisa:sTCM5093*

    The patch moves struct eisa_device_id declaration from include/linux/eisa.h
    to include/linux/mod_devicetable.h (so that the former now #includes the
    latter), adds proper MODULE_DEVICE_TABLE(eisa, ...) statements for all
    drivers with EISA IDs I found (some drivers already have that DEVICE_TABLE
    declared), and adds recognision of __mod_eisa_device_table to
    scripts/mod/file2alias.c so that proper modules.alias will be generated.

    There's no support for /lib/modules/$kver/modules.eisamap, as it's not used
    by any existing tools, and because with in-kernel modalias mechanism those
    maps are obsolete anyway.

    The rationale for this patch is:

    a) to make EISA bus to act as other busses with modalias
    support, to unify driver loading

    b) to foget about EISA finally - with this patch, kernel
    (who still supports EISA) will be the only one who knows
    how to choose the necessary drivers for this bus ;)

    [akpm@osdl.org: fix the kbuild bit]
    Signed-off-by: Michael Tokarev
    Cc: Rusty Russell
    Cc: Randy Dunlap
    Acked-the-net-bits-by: Jeff Garzik
    Acked-the-tulip-bit-by: Valerie Henson
    Cc: James Bottomley
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Michael Tokarev
     

25 Sep, 2006

1 commit

  • a319a2773   Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 ... Browse Code »

    * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (217 commits)
    net/ieee80211: fix more crypto-related build breakage
    [PATCH] Spidernet: add ethtool -S (show statistics)
    [NET] GT96100: Delete bitrotting ethernet driver
    [PATCH] mv643xx_eth: restrict to 32-bit PPC_MULTIPLATFORM
    [PATCH] Cirrus Logic ep93xx ethernet driver
    r8169: the MMIO region of the 8167 stands behin BAR#1
    e1000, ixgb: Remove pointless wrappers
    [PATCH] Remove powerpc specific parts of 3c509 driver
    [PATCH] s2io: Switch to pci_get_device
    [PATCH] gt96100: move to pci_get_device API
    [PATCH] ehea: bugfix for register access functions
    [PATCH] e1000 disable device on PCI error
    drivers/net/phy/fixed: #if 0 some incomplete code
    drivers/net: const-ify ethtool_ops declarations
    [PATCH] ethtool: allow const ethtool_ops
    [PATCH] sky2: big endian
    [PATCH] sky2: fiber support
    [PATCH] sky2: tx pause bug fix
    drivers/net: Trim trailing whitespace
    [PATCH] ehea: IBM eHEA Ethernet Device Driver
    ...

    Manually resolved conflicts in drivers/net/ixgb/ixgb_main.c and
    drivers/net/sky2.c related to CHECKSUM_HW/CHECKSUM_PARTIAL changes by
    commit 84fa7933a33f806bbbaae6775e87459b1ec584c0 that just happened to be
    next to unrelated changes in this update.

    Linus Torvalds
     

23 Sep, 2006

1 commit

14 Sep, 2006

2 commits

12 Sep, 2006

2 commits

20 Aug, 2006

1 commit

06 Jul, 2006

1 commit

04 Jul, 2006

1 commit

  • 0a9da4bd8   [PATCH] lockdep: annotate 3c59x.c disable_irq() ... Browse Code »

    3c59x.c's vortex_timer() function knows that vp->lock can only be used by an
    irq context that it disabled - and can hence take the vp->lock without
    disabling hardirqs. Teach lockdep about this.

    Has no effect on non-lockdep kernels.

    Signed-off-by: Ingo Molnar
    Cc: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

03 Jul, 2006

1 commit

01 Jul, 2006

1 commit

30 Jun, 2006

1 commit

  • 1903ac54f   Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 ... Browse Code »

    * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6:
    [PATCH] i386: export memory more than 4G through /proc/iomem
    [PATCH] 64bit Resource: finally enable 64bit resource sizes
    [PATCH] 64bit Resource: convert a few remaining drivers to use resource_size_t where needed
    [PATCH] 64bit resource: change pnp core to use resource_size_t
    [PATCH] 64bit resource: change pci core and arch code to use resource_size_t
    [PATCH] 64bit resource: change resource core to use resource_size_t
    [PATCH] 64bit resource: introduce resource_size_t for the start and end of struct resource
    [PATCH] 64bit resource: fix up printks for resources in misc drivers
    [PATCH] 64bit resource: fix up printks for resources in arch and core code
    [PATCH] 64bit resource: fix up printks for resources in pcmcia drivers
    [PATCH] 64bit resource: fix up printks for resources in video drivers
    [PATCH] 64bit resource: fix up printks for resources in ide drivers
    [PATCH] 64bit resource: fix up printks for resources in mtd drivers
    [PATCH] 64bit resource: fix up printks for resources in pci core and hotplug drivers
    [PATCH] 64bit resource: fix up printks for resources in networks drivers
    [PATCH] 64bit resource: fix up printks for resources in sound drivers
    [PATCH] 64bit resource: C99 changes for struct resource declarations

    Fixed up trivial conflict in drivers/ide/pci/cmd64x.c (the printk that
    was changed by the 64-bit resources had been deleted in the meantime ;)

    Linus Torvalds
     

28 Jun, 2006

1 commit

27 Jun, 2006

1 commit

  • 1f1bd5fc3   [netdrvr] Remove long-unused bits from Becker template drivers ... Browse Code »

    Symbols such as PCI_USES_IO, PCI_ADDR0, etc. originated from Donald
    Becker's net driver template, but have been long unused. Remove.

    In a few drivers, this allows the further eliminate of the pci_flags (or
    just plain flags) member in the template driver probe structure.

    Most of this logic is simply open-coded in most drivers, since it never
    changes.

    Made a few other cleanups while I was in there, too:
    * constify, __devinitdata several PCI ID tables
    * replace table terminating entries such as "{0,}," and "{NULL},"
    with a more-clean "{ }".

    Signed-off-by: Jeff Garzik

    Jeff Garzik
     

20 Jun, 2006

1 commit

  • c6387a48c   [SPARC]: Kill __irq_itoa(). ... Browse Code »

    This ugly hack was long overdue to die.

    It was a way to print out Sparc interrupts in a more freindly format,
    since IRQ numbers were arbitrary opaque 32-bit integers which vectored
    into PIL levels. These 32-bit integers were not necessarily in the
    0-->NR_IRQS range, but the PILs they vectored to were.

    The idea now is that we will increase NR_IRQS a little bit and use a
    virtualreal IRQ number mapping scheme similar to PowerPC.

    That makes this IRQ printing hack irrelevant, and furthermore only a
    handful of drivers actually used __irq_itoa() making it even less
    useful.

    Signed-off-by: David S. Miller

    David S. Miller
     

01 Apr, 2006

2 commits

  • 09ce3512d   [PATCH] 3c59x: fix networking for 10base2 NICs ... Browse Code »

    The "3c59x: use mii_check_media" patch introduced a netif_carrier_off in
    vortex_up. 10base2 stoped working because of this. This is removed.

    Tx/Rx reset is back in vortex_up because the 3c900B-Combo stops working after
    changing from half duplex to full duplex when Tx/Rx reset is done with
    vortex_timer.

    Also brought back some mii stuff to be sure that it does not break something
    else.

    Thanks to Pete Clements for reporting and testing.

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

    Steffen Klassert
     
  • 0000754c2   [PATCH] "3c59x collision statistics fix" fix ... Browse Code »

    The pre-2.6.16 patch "3c59x collision statistics fix" accidentally caused
    vortex_error() to not run iowrite16(TxEnable, ioaddr + EL3_CMD) if we got a
    maxCollisions interrupt but MAX_COLLISION_RESET is not set.

    Thanks to Pete Clements for reporting and testing.

    Acked-by: Steffen Klassert
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     

27 Mar, 2006

6 commits

26 Mar, 2006

1 commit

04 Mar, 2006

2 commits

07 Feb, 2006

1 commit

04 Feb, 2006

1 commit

17 Jan, 2006

1 commit

07 Nov, 2005

9 commits