Eric Lee / smarc-fsl-linux-kernel

17 Jul, 2007

1 commit

  • 1b0fac458   dma-mapping: prevent dma dependent code from linking on !HAS_DMA archs ... Browse Code »

    Continuing the work started in 411f0f3edc141a582190d3605cadd1d993abb6df ...

    This enables code with a dma path, that compiles away, to build without
    requiring additional code factoring. It also prevents code that calls
    dma_alloc_coherent and dma_free_coherent from linking whereas previously
    the code would hit a BUG() at run time. Finally, it allows archs that set
    !HAS_DMA to delete their asm/dma-mapping.h file.

    Cc: Cornelia Huck
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: John W. Linville
    Cc: Kyle McMartin
    Cc: James Bottomley
    Cc: Tejun Heo
    Cc: Jeff Garzik
    Cc:
    Cc:
    Cc:
    Cc:
    Signed-off-by: Dan Williams
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Dan Williams
     

08 May, 2007

1 commit

12 Feb, 2007

1 commit

  • 5ac6da669   [PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA ... Browse Code »

    As Andi pointed out: CONFIG_GENERIC_ISA_DMA only disables the ISA DMA
    channel management. Other functionality may still expect GFP_DMA to
    provide memory below 16M. So we need to make sure that CONFIG_ZONE_DMA is
    set independent of CONFIG_GENERIC_ISA_DMA. Undo the modifications to
    mm/Kconfig where we made ZONE_DMA dependent on GENERIC_ISA_DMA and set
    theses explicitly in each arches Kconfig.

    Reviews must occur for each arch in order to determine if ZONE_DMA can be
    switched off. It can only be switched off if we know that all devices
    supported by a platform are capable of performing DMA transfers to all of
    memory (Some arches already support this: uml, avr32, sh sh64, parisc and
    IA64/Altix).

    In order to switch ZONE_DMA off conditionally, one would have to establish
    a scheme by which one can assure that no drivers are enabled that are only
    capable of doing I/O to a part of memory, or one needs to provide an
    alternate means of performing an allocation from a specific range of memory
    (like provided by alloc_pages_range()) and insure that all drivers use that
    call. In that case the arches alloc_dma_coherent() may need to be modified
    to call alloc_pages_range() instead of relying on GFP_DMA.

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

    Christoph Lameter
     

09 Dec, 2006

1 commit

  • f0d1b0b30   [PATCH] LOG2: Implement a general integer log2 facility in the kernel ... Browse Code »

    This facility provides three entry points:

    ilog2() Log base 2 of unsigned long
    ilog2_u32() Log base 2 of u32
    ilog2_u64() Log base 2 of u64

    These facilities can either be used inside functions on dynamic data:

    int do_something(long q)
    {
    ...;
    y = ilog2(x)
    ...;
    }

    Or can be used to statically initialise global variables with constant values:

    unsigned n = ilog2(27);

    When performing static initialisation, the compiler will report "error:
    initializer element is not constant" if asked to take a log of zero or of
    something not reducible to a constant. They treat negative numbers as
    unsigned.

    When not dealing with a constant, they fall back to using fls() which permits
    them to use arch-specific log calculation instructions - such as BSR on
    x86/x86_64 or SCAN on FRV - if available.

    [akpm@osdl.org: MMC fix]
    Signed-off-by: David Howells
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc: Herbert Xu
    Cc: David Howells
    Cc: Wojtek Kaniewski
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Howells
     

01 Jul, 2006

1 commit

27 Mar, 2006

1 commit

  • d142d8601   [PATCH] bitops: arm26: use generic bitops ... Browse Code »

    - remove __{,test_and_}{set,clear,change}_bit() and test_bit()
    - remove ffz()
    - remove __ffs()
    - remove generic_fls()
    - remove generic_fls64()
    - remove generic_ffs()
    - remove sched_find_first_bit()
    - remove generic_hweight{32,16,8}()

    Signed-off-by: Akinobu Mita
    Cc: Ian Molton
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     

02 Feb, 2006

2 commits

09 Jan, 2006

1 commit

  • e585e4703   [PATCH] tiny: Make *[ug]id16 support optional ... Browse Code »

    Configurable 16-bit UID and friends support

    This allows turning off the legacy 16 bit UID interfaces on embedded platforms.

    text data bss dec hex filename
    3330172 529036 190556 4049764 3dcb64 vmlinux-baseline
    3328268 529040 190556 4047864 3dc3f8 vmlinux

    From: Adrian Bunk

    UID16 was accidentially disabled for !EMBEDDED.

    Signed-off-by: Matt Mackall
    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Matt Mackall
     

08 Sep, 2005

1 commit

  • a08b6b796   [PATCH] Kconfig fix (BLK_DEV_FD dependencies) ... Browse Code »

    Sanitized and fixed floppy dependencies: split the messy dependencies for
    BLK_DEV_FD by introducing a new symbol (ARCH_MAY_HAVE_PC_FDC), making
    BLK_DEV_FD depend on that one and taking declarations of ARCH_MAY_HAVE_PC_FDC
    to arch/*/Kconfig. While we are at it, fixed several obvious cases when
    BLK_DEV_FD should have been excluded (architectures lacking asm/floppy.h
    are *not* going to have floppy.c compile, let alone work).

    If you can come up with better name for that ("this architecture might
    have working PC-compatible floppy disk controller"), you are more than
    welcome - just s/ARCH_MAY_HAVE_PC_FDC/your_prefered_name/g in the patch
    below...

    Signed-off-by: Al Viro
    Signed-off-by: Linus Torvalds

    viro@ZenIV.linux.org.uk
     

12 Jul, 2005

1 commit

  • d5950b435   [NET]: add a top-level Networking menu to *config ... Browse Code »

    Create a new top-level menu named "Networking" thus moving
    net related options and protocol selection way from the drivers
    menu and up on the top-level where they belong.

    To implement this all architectures has to source "net/Kconfig" before
    drivers/*/Kconfig in their Kconfig file. This change has been
    implemented for all architectures.

    Device drivers for ordinary NIC's are still to be found
    in the Device Drivers section, but Bluetooth, IrDA and ax25
    are located with their corresponding menu entries under the new
    networking menu item.

    Signed-off-by: Sam Ravnborg
    Signed-off-by: David S. Miller

    Sam Ravnborg
     

24 Jun, 2005

1 commit

  • 3f22ab276   [PATCH] make each arch use mm/Kconfig ... Browse Code »

    For all architectures, this just means that you'll see a "Memory Model"
    choice in your architecture menu. For those that implement DISCONTIGMEM,
    you may eventually want to make your ARCH_DISCONTIGMEM_ENABLE a "def_bool
    y" and make your users select DISCONTIGMEM right out of the new choice
    menu. The only disadvantage might be if you have some specific things that
    you need in your help option to explain something about DISCONTIGMEM.

    Signed-off-by: Dave Hansen
    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Dave Hansen
     

04 May, 2005

1 commit

  • 5cae841b1   [PATCH] ISA DMA Kconfig fixes - part 1 ... Browse Code »

    A bunch of drivers use ISA DMA helpers or their equivalents for
    platforms that have ISA with different DMA controller (a lot of ARM
    boxen). Currently there is no way to put such dependency in Kconfig -
    CONFIG_ISA is not it (e.g. it is not set on platforms that have no ISA
    slots, but have on-board devices that pretend to be ISA ones).

    New symbol added - ISA_DMA_API. Set when we have functional
    enable_dma()/set_dma_mode()/etc. set of helpers. Next patches in the
    series will add missing dependencies for drivers that need them.

    I'm very carefully staying the hell out of the recurring flamefest on
    what exactly CONFIG_ISA would mean in ideal world - added symbol has a
    well-defined meaning and for now I really want to treat it as completely
    independent from the mess around CONFIG_ISA.

    Signed-off-by: Al Viro
    Signed-off-by: Linus Torvalds

    Al Viro
     

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