Eric Lee / smarc-fsl-linux-kernel

01 Nov, 2011

1 commit

27 Jul, 2011

1 commit

  • 60063497a   atomic: use <linux/atomic.h> ... Browse Code »

    This allows us to move duplicated code in
    (atomic_inc_not_zero() for now) to

    Signed-off-by: Arun Sharma
    Reviewed-by: Eric Dumazet
    Cc: Ingo Molnar
    Cc: David Miller
    Cc: Eric Dumazet
    Acked-by: Mike Frysinger
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arun Sharma
     

29 Mar, 2011

1 commit

26 Mar, 2011

2 commits

30 Oct, 2010

1 commit

  • 334c86c49   MIPS: IRQ: Add stackoverflow detection ... Browse Code »

    Add stackoverflow detection to mips arch

    Signed-off-by: Adam Jiang
    Cc: dmitri.vorobiev@movial.com
    Cc: wuzhangjin@gmail.com
    Cc: ddaney@caviumnetworks.com
    Cc: peterz@infradead.org
    Cc: fweisbec@gmail.com
    Cc: tj@kernel.org
    Cc: tglx@linutronix.de
    Cc: mingo@elte.hu
    Cc: linux-mips@linux-mips.org
    Cc: linux-kernel@vger.kernel.org
    Patchwork: https://patchwork.linux-mips.org/patch/1559/
    Patchwork: https://patchwork.linux-mips.org/patch/1651/
    Signed-off-by: Ralf Baechle

    From: jiang.adam@gmail.com
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

17 Dec, 2009

1 commit

  • 8f99a1626   MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS ... Browse Code »

    This patch add a new section for MIPS to record the block of the hardirq
    handling for function graph tracer(print_graph_irq) via adding the
    __irq_entry annotation to the the entrypoints of the hardirqs(the block
    with irq_enter()...irq_exit()).

    Thanks goes to Steven & Frederic Weisbecker for their feedbacks.

    Signed-off-by: Wu Zhangjin
    Cc: Steven Rostedt
    Cc: Nicholas Mc Guire
    Cc: zhangfx@lemote.com
    Cc: Wu Zhangjin
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: Frederic Weisbecker
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-mips@linux-mips.org
    Reviewed-by: Frederic Weisbecker
    Patchwork: http://patchwork.linux-mips.org/patch/676/
    Signed-off-by: Ralf Baechle

    Wu Zhangjin
     

15 Dec, 2009

1 commit

16 Mar, 2009

1 commit

28 Feb, 2009

1 commit

13 Feb, 2009

1 commit

13 Jan, 2009

1 commit

11 Jan, 2009

2 commits

  • dee4102a9   sparseirq: use kstat_irqs_cpu instead ... Browse Code »

    Impact: build fix

    Ingo Molnar wrote:

    > tip/arch/blackfin/kernel/irqchip.c: In function 'show_interrupts':
    > tip/arch/blackfin/kernel/irqchip.c:85: error: 'struct kernel_stat' has no member named 'irqs'
    > make[2]: *** [arch/blackfin/kernel/irqchip.o] Error 1
    > make[2]: *** Waiting for unfinished jobs....
    >

    So could move kstat_irqs array to irq_desc struct.

    (s390, m68k, sparc) are not touched yet, because they don't support genirq

    Signed-off-by: Yinghai Lu
    Signed-off-by: Ingo Molnar

    Yinghai Lu
     
  • 558d1de8b   MIPS: Print irq handler description ... Browse Code »

    Add the name set by set_irq_chip_and_handler_name() to the output of
    /proc/interrupts, like so:

    db1200 ~ # cat /proc/interrupts
    CPU0
    8: 52 Alchemy-IC0-hilevel serial
    10: 171 Alchemy-IC0-hilevel au1xxx-mmc
    11: 47 Alchemy-IC0-hilevel Au1xxx dbdma
    18: 1 Alchemy-IC0-hilevel au1550-spi
    29: 1250997 Alchemy-IC0-riseedge timer
    37: 211 Alchemy-IC0-hilevel ehci_hcd:usb1, ohci_hcd:usb2
    38: 0 Alchemy-IC0-hilevel lcd
    72: 2623 DB1200 CPLD-level ide0
    73: 257 DB1200 CPLD-level eth0
    84: 1 DB1200 CPLD-level sd_insert
    85: 0 DB1200 CPLD-level sd_eject

    ERR: 0

    Signed-off-by: Manuel Lauss
    Signed-off-by: Ralf Baechle

    Manuel Lauss
     

31 Jul, 2008

2 commits

  • 885470011   [MIPS] kgdb: add arch support for the kernel's kgdb core ... Browse Code »

    The new kgdb architecture specific handler registers and unregisters
    dynamically for exceptions depending on when you configure a kgdb I/O
    driver.

    Aside from initializing the exceptions earlier in the boot process,
    kgdb should have no impact on a device when it is compiled in so long
    as an I/O module is not configured for use.

    There have been quite a number of contributors during the existence of
    this patch (see arch/mips/kernel/kgdb.c). Most recently Jason
    re-wrote the mips kgdb logic to use the die notification handlers.

    Signed-off-by: Jason Wessel
    Signed-off-by: Ralf Baechle

    Jason Wessel
     
  • 8d60a903d   [MIPS] kgdb: Remove existing implementation ... Browse Code »

    This patch explicitly removes the kgdb implementation, for mips which
    is intended to be followed by a patch that adds a kgdb implementation
    for MIPS that makes use of the kgdb core in the kernel.

    Signed-off-by: Jason Wessel
    Signed-off-by: Ralf Baechle

    Jason Wessel
     

16 Jul, 2008

1 commit

09 Feb, 2008

1 commit

12 Oct, 2007

1 commit

25 Sep, 2007

1 commit

11 May, 2007

1 commit

  • f543110da   [MIPS] Drop __devinit tag from allocate_irqno() and free_irqno() ... Browse Code »

    This fix these warnings:

    WARNING: arch/mips/kernel/built-in.o - Section mismatch: reference to .init.text:free_irqno from __ksymtab_gpl between '__ksymtab_free_irqno' (at offset 0x0) and '__ksymtab_allocate_irqno'
    WARNING: arch/mips/kernel/built-in.o - Section mismatch: reference to .init.text:allocate_irqno from __ksymtab_gpl after '__ksymtab_allocate_irqno' (at offset 0x8)

    Signed-off-by: Atsushi Nemoto
    Signed-off-by: Ralf Baechle

    Atsushi Nemoto
     

07 Dec, 2006

1 commit

30 Nov, 2006

2 commits

  • 187933f23   [MIPS] do_IRQ cleanup ... Browse Code »

    Now we have both function and macro version of do_IRQ() and the former
    is used only by DEC and non-preemptive kernel. This patch makes
    everyone use the macro version and removes the function version.

    Signed-off-by: Atsushi Nemoto
    Signed-off-by: Ralf Baechle

    Atsushi Nemoto
     
  • 1603b5aca   [MIPS] IRQ cleanups ... Browse Code »

    This is a big irq cleanup patch.

    * Use set_irq_chip() to register irq_chip.
    * Initialize .mask, .unmask, .mask_ack field. Functions for these
    method are already exist in most case.
    * Do not initialize .startup, .shutdown, .enable, .disable fields if
    default routines provided by irq_chip_set_defaults() were suitable.
    * Remove redundant irq_desc initializations.
    * Remove unnecessary local_irq_save/local_irq_restore, spin_lock.

    With this cleanup, it would be easy to switch to slightly lightwait
    irq flow handlers (handle_level_irq(), etc.) instead of __do_IRQ().

    Though whole this patch is quite large, changes in each irq_chip are
    not quite simple. Please review and test on your platform. Thanks.

    Signed-off-by: Atsushi Nemoto
    Signed-off-by: Ralf Baechle

    Atsushi Nemoto
     

07 Nov, 2006

1 commit

08 Oct, 2006

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
     

14 Jul, 2006

1 commit

01 Jul, 2006

1 commit

30 Jun, 2006

1 commit

  • d1bef4ed5   [PATCH] genirq: rename desc->handler to desc->chip ... Browse Code »

    This patch-queue improves the generic IRQ layer to be truly generic, by adding
    various abstractions and features to it, without impacting existing
    functionality.

    While the queue can be best described as "fix and improve everything in the
    generic IRQ layer that we could think of", and thus it consists of many
    smaller features and lots of cleanups, the one feature that stands out most is
    the new 'irq chip' abstraction.

    The irq-chip abstraction is about describing and coding and IRQ controller
    driver by mapping its raw hardware capabilities [and quirks, if needed] in a
    straightforward way, without having to think about "IRQ flow"
    (level/edge/etc.) type of details.

    This stands in contrast with the current 'irq-type' model of genirq
    architectures, which 'mixes' raw hardware capabilities with 'flow' details.
    The patchset supports both types of irq controller designs at once, and
    converts i386 and x86_64 to the new irq-chip design.

    As a bonus side-effect of the irq-chip approach, chained interrupt controllers
    (master/slave PIC constructs, etc.) are now supported by design as well.

    The end result of this patchset intends to be simpler architecture-level code
    and more consolidation between architectures.

    We reused many bits of code and many concepts from Russell King's ARM IRQ
    layer, the merging of which was one of the motivations for this patchset.

    This patch:

    rename desc->handler to desc->chip.

    Originally i did not want to do this, because it's a big patch. But having
    both "desc->handler", "desc->handle_irq" and "action->handler" caused a
    large degree of confusion and made the code appear alot less clean than it
    truly is.

    I have also attempted a dual approach as well by introducing a
    desc->chip alias - but that just wasnt robust enough and broke
    frequently.

    So lets get over with this quickly. The conversion was done automatically
    via scripts and converts all the code in the kernel.

    This renaming patch is the first one amongst the patches, so that the
    remaining patches can stay flexible and can be merged and split up
    without having some big monolithic patch act as a merge barrier.

    [akpm@osdl.org: build fix]
    [akpm@osdl.org: another build fix]
    Signed-off-by: Ingo Molnar
    Signed-off-by: Thomas Gleixner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

19 Apr, 2006

2 commits

23 Mar, 2006

1 commit

  • 394e3902c   [PATCH] more for_each_cpu() conversions ... Browse Code »

    When we stop allocating percpu memory for not-possible CPUs we must not touch
    the percpu data for not-possible CPUs at all. The correct way of doing this
    is to test cpu_possible() or to use for_each_cpu().

    This patch is a kernel-wide sweep of all instances of NR_CPUS. I found very
    few instances of this bug, if any. But the patch converts lots of open-coded
    test to use the preferred helper macros.

    Cc: Mikael Starvik
    Cc: David Howells
    Acked-by: Kyle McMartin
    Cc: Anton Blanchard
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: Paul Mundt
    Cc: "David S. Miller"
    Cc: William Lee Irwin III
    Cc: Andi Kleen
    Cc: Christian Zankel
    Cc: Philippe Elie
    Cc: Nathan Scott
    Cc: Jens Axboe
    Cc: Eric Dumazet
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     

05 Sep, 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