Eric Lee / smarc-ti-linux-kernel

07 Oct, 2006

2 commits

  • 5a078351d   [ALSA] version 1.0.13 ... Browse Code »

    Signed-off-by: Jaroslav Kysela

    Jaroslav Kysela
     
  • a9edfc602   [ALSA] Handle file operations during snd_card disconnects using static file->f_op ... Browse Code »

    Alsa used to kmalloc one file->f_op per file per disconnecting snd_card.
    This led to oopses sometimes when file->f_op was freed before __fput()
    finished.
    Patch adds a virtual device for disconnect: VDD.
    VDD consists of:
    LIST_HEAD(shutdown_files)
    protected by DEFINE_SPINLOCK(shutdown_mutex)
    static struct file_operations snd_shutdown_f_ops
    and functions assigned to it
    Additions to struct snd_monitor_file
    to specify if instance is hidden by VDD or not.
    A VDD's instance is
    created in snd_card_disconnect() under the card->files_lock.
    cleaned up in snd_card_file_remove() under the card->files_lock.

    Signed-off-by: Karsten Wiese
    Signed-off-by: Takashi Iwai
    Signed-off-by: Jaroslav Kysela

    Karsten Wiese
     

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
     

01 Oct, 2006

1 commit

  • 9442e691e   [PATCH] maximum latency tracking: ALSA support ... Browse Code »

    Add maximum latency tracking to the ALSA subsystem for PCM playback. In
    ALSA, the playback application controls the buffer size and thus indirectly
    the period of latency that it can deal with. This patch uses 75% of the
    total available latency as threshold to announce to the latency subsystem;
    While 75% is a crude heuristic it's a quite reasonable one; the remaining
    25% can be used for all driver processing for the next samples which is
    also proportional to the size of the buffer.

    With ogg123 a latency setting of about 4msec was seen (at 44Khz), while
    with the "play" command a much longer maximum tolerable latency was seen.
    Other, more multimedia oriented players as well as games, will have a lot
    smaller buffers to allow better synchronization and those will actually get
    into the latency domains where there is impact on the power management
    rules.

    Signed-off-by: Takashi Iwai
    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Takashi Iwai
     

23 Sep, 2006

17 commits

19 Sep, 2006

1 commit

13 Jul, 2006

2 commits

05 Jul, 2006

1 commit

  • 6fa0cb114   Merge git://git.infradead.org/hdrinstall-2.6 ... Browse Code »

    * git://git.infradead.org/hdrinstall-2.6:
    Remove export of include/linux/isdn/tpam.h
    Remove and from userspace export
    Restrict headers exported to userspace for SPARC and SPARC64
    Add empty Kbuild files for 'make headers_install' in remaining arches.
    Add Kbuild file for Alpha 'make headers_install'
    Add Kbuild file for SPARC 'make headers_install'
    Add Kbuild file for IA64 'make headers_install'
    Add Kbuild file for S390 'make headers_install'
    Add Kbuild file for i386 'make headers_install'
    Add Kbuild file for x86_64 'make headers_install'
    Add Kbuild file for PowerPC 'make headers_install'
    Add generic Kbuild files for 'make headers_install'
    Basic implementation of 'make headers_check'
    Basic implementation of 'make headers_install'

    Linus Torvalds
     

03 Jul, 2006

1 commit

29 Jun, 2006

4 commits

25 Jun, 2006

1 commit

  • 7477ddaa4   V4L/DVB (4210b): git-dvb: tea575x-tuner build fix ... Browse Code »

    In file included from sound/i2c/other/tea575x-tuner.c:30:
    include/sound/tea575x-tuner.h:36: error: field 'vd' has incomplete type
    include/sound/tea575x-tuner.h:37: error: field 'fops' has incomplete type
    sound/i2c/other/tea575x-tuner.c:89: warning: 'struct inode' declared inside parameter list
    sound/i2c/other/tea575x-tuner.c:89: warning: its scope is only this definition or declaration, which is probably not what you want
    sound/i2c/other/tea575x-tuner.c: In function 'snd_tea575x_ioctl':
    sound/i2c/other/tea575x-tuner.c:91: warning: implicit declaration of function 'video_devdata'
    sound/i2c/other/tea575x-tuner.c:91: warning: initialization makes pointer from integer without a cast
    sound/i2c/other/tea575x-tuner.c:92: warning: implicit declaration of function 'video_get_drvdata'
    sound/i2c/other/tea575x-tuner.c:92: warning: initialization makes pointer from integer without a cast
    sound/i2c/other/tea575x-tuner.c:96: warning: implicit declaration of function '_IOR'
    sound/i2c/other/tea575x-tuner.c:96: error: syntax error before 'struct'
    sound/i2c/other/tea575x-tuner.c:99: error: 'v' undeclared (first use in this function)
    sound/i2c/other/tea575x-tuner.c:99: error: (Each undeclared identifier is reported only once
    sound/i2c/other/tea575x-tuner.c:99: error: for each function it appears in.)
    sound/i2c/other/tea575x-tuner.c:108: warning: implicit declaration of function 'copy_to_user'
    sound/i2c/other/tea575x-tuner.c:112: warning: implicit declaration of function '_IOWR'
    sound/i2c/other/tea575x-tuner.c:112: error: syntax error before 'struct'
    sound/i2c/other/tea575x-tuner.c:115: warning: implicit declaration of function 'copy_from_user'
    sound/i2c/other/tea575x-tuner.c: At top level:
    sound/i2c/other/tea575x-tuner.c:129: error: syntax error before 'case'
    sound/i2c/other/tea575x-tuner.c:146: warning: type defaults to 'int' in declaration of 'snd_tea575x_set_freq'
    sound/i2c/other/tea575x-tuner.c:146: warning: parameter names (without types) in function declaration
    sound/i2c/other/tea575x-tuner.c:146: error: conflicting types for 'snd_tea575x_set_freq'
    sound/i2c/other/tea575x-tuner.c:62: error: previous definition of 'snd_tea575x_set_freq' was here
    sound/i2c/other/tea575x-tuner.c:146: warning: data definition has no type or storage class
    sound/i2c/other/tea575x-tuner.c:147: error: syntax error before 'return'
    sound/i2c/other/tea575x-tuner.c:151: error: syntax error before '&' token
    sound/i2c/other/tea575x-tuner.c:152: error: syntax error before '.' token
    sound/i2c/other/tea575x-tuner.c:152: warning: type defaults to 'int' in declaration of 'strcpy'
    sound/i2c/other/tea575x-tuner.c:152: warning: function declaration isn't a prototype
    sound/i2c/other/tea575x-tuner.c:152: error: conflicting types for 'strcpy'
    sound/i2c/other/tea575x-tuner.c:152: warning: data definition has no type or storage class
    sound/i2c/other/tea575x-tuner.c: In function 'snd_tea575x_init':
    sound/i2c/other/tea575x-tuner.c:194: warning: implicit declaration of function 'video_set_drvdata'
    sound/i2c/other/tea575x-tuner.c:197: error: 'video_exclusive_open' undeclared (first use in this function)
    sound/i2c/other/tea575x-tuner.c:198: error: 'video_exclusive_release' undeclared (first use in this function)
    sound/i2c/other/tea575x-tuner.c:200: warning: implicit declaration of function 'video_register_device'
    sound/i2c/other/tea575x-tuner.c:200: error: 'VFL_TYPE_RADIO' undeclared (first use in this function)
    sound/i2c/other/tea575x-tuner.c: In function 'snd_tea575x_exit':
    sound/i2c/other/tea575x-tuner.c:215: warning: implicit declaration of function 'video_unregister_device'
    distcc[7333] ERROR: compile sound/i2c/other/tea575x-tuner.c on x/32 failed
    make[1]: *** [sound/i2c/other/tea575x-tuner.o] Error 1

    Signed-off-by: Andrew Morton
    Signed-off-by: Mauro Carvalho Chehab

    Andrew Morton
     

23 Jun, 2006

9 commits