Eric Lee / smarc-fsl-linux-kernel

01 Nov, 2011

1 commit

16 Mar, 2011

1 commit

  • bd2895eea   Merge branch 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq ... Browse Code »

    * 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
    workqueue: fix build failure introduced by s/freezeable/freezable/
    workqueue: add system_freezeable_wq
    rds/ib: use system_wq instead of rds_ib_fmr_wq
    net/9p: replace p9_poll_task with a work
    net/9p: use system_wq instead of p9_mux_wq
    xfs: convert to alloc_workqueue()
    reiserfs: make commit_wq use the default concurrency level
    ocfs2: use system_wq instead of ocfs2_quota_wq
    ext4: convert to alloc_workqueue()
    scsi/scsi_tgt_lib: scsi_tgtd isn't used in memory reclaim path
    scsi/be2iscsi,qla2xxx: convert to alloc_workqueue()
    misc/iwmc3200top: use system_wq instead of dedicated workqueues
    i2o: use alloc_workqueue() instead of create_workqueue()
    acpi: kacpi*_wq don't need WQ_MEM_RECLAIM
    fs/aio: aio_wq isn't used in memory reclaim path
    input/tps6507x-ts: use system_wq instead of dedicated workqueue
    cpufreq: use system_wq instead of dedicated workqueues
    wireless/ipw2x00: use system_wq instead of dedicated workqueues
    arm/omap: use system_wq in mailbox
    workqueue: use WQ_MEM_RECLAIM instead of WQ_RESCUER

    Linus Torvalds
     

15 Feb, 2011

1 commit

  • c03773206   OMAP2+: mailbox: fix lookups for multiple mailboxes ... Browse Code »

    The pointer math in omap_mbox_get() is not quite right, and leads to
    passing NULL to strcmp() when searching for an mbox that is not first
    in the list.

    Convert to using array indexing as is done in all the other functions
    which walk the mbox list.

    Tested on OMAP2420/n810, OMAP3630/zoom3, OMAP4430/Blaze

    Signed-off-by: Kevin Hilman
    Signed-off-by: Tony Lindgren

    Kevin Hilman
     

26 Jan, 2011

1 commit

  • c48730056   arm/omap: use system_wq in mailbox ... Browse Code »

    With cmwq, there's no reason to use a separate workqueue for mailbox.
    Use the system_wq instead. mbox->rxq->work is sync flushed in
    omap_mbox_fini() to make sure it's not running on any cpu, which makes
    sure that no mbox work is running when omap_mbox_exit() is entered.

    Signed-off-by: Tejun Heo
    Acked-by: Hari Kanigeri
    Cc: Tony Lindgren
    Cc: linux-omap@vger.kernel.org

    Tejun Heo
     

02 Dec, 2010

4 commits

  • 582563074   OMAP: mailbox: add notification support for multiple readers ... Browse Code »

    In the current mailbox driver, the mailbox internal pointer for
    callback can be directly manipulated by the Users, so a second
    User can easily corrupt the first user's callback pointer.
    The initial effort to correct this issue can be referred here:
    https://patchwork.kernel.org/patch/107520/

    Along with fixing the above stated issue, this patch adds the
    flexibility option to register notifications from
    multiple readers to the events received on a mailbox instance.
    The discussion regarding this can be referred here.
    http://www.mail-archive.com/linux-omap@vger.kernel.org/msg30671.html

    Signed-off-by: Hari Kanigeri
    Signed-off-by: Fernando Guzman Lugo
    Acked-by: Hiroshi Doyu

    Kanigeri, Hari
     
  • a42743c26   OMAP: mailbox: send message in process context ... Browse Code »

    Schedule the Tasklet to send only when mailbox fifo is full and there are
    pending messages in kfifo, else send the message directly in the Process
    context. This would avoid needless scheduling of Tasklet for every message
    transfer

    Signed-off-by: Hari Kanigeri
    Acked-by: Hiroshi Doyu

    Kanigeri, Hari
     
  • ab66ac300   OMAP: mailbox: fix checkpatch warnings ... Browse Code »

    Fix the following checkpatch warnings observed in mailbox module.

    WARNING: please, no space for starting a line,
    excluding comments
    + fail_alloc_rxq:$

    WARNING: please, no space for starting a line,
    excluding comments
    + fail_alloc_txq:$

    WARNING: please, no space for starting a line,
    excluding comments
    + fail_request_irq:$

    WARNING: line over 80 characters
    + mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size, sizeof(mbox_msg_t));

    Signed-off-by: Hari Kanigeri
    Acked-by: Hiroshi Doyu

    Kanigeri, Hari
     
  • d2295042b   OMAP: mailbox: change full flag per mailbox queue instead of global ... Browse Code »

    The variable rq_full flag is a global variable, so if there are multiple
    mailbox users there will be conflicts. Now there is a full flag per
    mailbox queue.

    Reported-by: Ohad Ben-Cohen
    Signed-off-by: Fernando Guzman Lugo
    Signed-off-by: Hari Kanigeri
    Acked-by: Hiroshi Doyu

    Fernando Guzman Lugo
     

04 Aug, 2010

12 commits

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
     

24 Feb, 2010

1 commit

  • 8250a5c38   omap2/3/4: mailbox: use dedicated work queue for handling mailbox rx interrupt ... Browse Code »

    keventd_wq is a shared work-queue, and should not be used when we
    need fast deterministic response. Instead mailbox driver should
    use it's own private work-queue, with it's own thread, to ensure
    that handling of RX interrupts are not delayed by other drivers.

    The tasklet is still used for transmission of mbox messages.

    Signed-off-by: Rob Clark
    Signed-off-by: C A Subramaniam
    Signed-off-by: Suman Anna
    Acked-by: Hiroshi DOYU
    Signed-off-by: Tony Lindgren

    Rob Clark
     

23 Nov, 2009

8 commits

21 Oct, 2009

1 commit

  • ce491cf85   omap: headers: Move remaining headers from include/mach to include/plat ... Browse Code »

    Move the remaining headers under plat-omap/include/mach
    to plat-omap/include/plat. Also search and replace the
    files using these headers to include using the right path.

    This was done with:

    #!/bin/bash
    mach_dir_old="arch/arm/plat-omap/include/mach"
    plat_dir_new="arch/arm/plat-omap/include/plat"
    headers=$(cd $mach_dir_old && ls *.h)
    omap_dirs="arch/arm/*omap*/ \
    drivers/video/omap \
    sound/soc/omap"
    other_files="drivers/leds/leds-ams-delta.c \
    drivers/mfd/menelaus.c \
    drivers/mfd/twl4030-core.c \
    drivers/mtd/nand/ams-delta.c"

    for header in $headers; do
    old="#include

    Tony Lindgren
     

11 May, 2009

2 commits

  • 9934c8c04   block: implement and enforce request peek/start/fetch ... Browse Code »

    Till now block layer allowed two separate modes of request execution.
    A request is always acquired from the request queue via
    elv_next_request(). After that, drivers are free to either dequeue it
    or process it without dequeueing. Dequeue allows elv_next_request()
    to return the next request so that multiple requests can be in flight.

    Executing requests without dequeueing has its merits mostly in
    allowing drivers for simpler devices which can't do sg to deal with
    segments only without considering request boundary. However, the
    benefit this brings is dubious and declining while the cost of the API
    ambiguity is increasing. Segment based drivers are usually for very
    old or limited devices and as converting to dequeueing model isn't
    difficult, it doesn't justify the API overhead it puts on block layer
    and its more modern users.

    Previous patches converted all block low level drivers to dequeueing
    model. This patch completes the API transition by...

    * renaming elv_next_request() to blk_peek_request()

    * renaming blkdev_dequeue_request() to blk_start_request()

    * adding blk_fetch_request() which is combination of peek and start

    * disallowing completion of queued (not started) requests

    * applying new API to all LLDs

    Renamings are for consistency and to break out of tree code so that
    it's apparent that out of tree drivers need updating.

    [ Impact: block request issue API cleanup, no functional change ]

    Signed-off-by: Tejun Heo
    Cc: Rusty Russell
    Cc: James Bottomley
    Cc: Mike Miller
    Cc: unsik Kim
    Cc: Paul Clements
    Cc: Tim Waugh
    Cc: Geert Uytterhoeven
    Cc: David S. Miller
    Cc: Laurent Vivier
    Cc: Jeff Garzik
    Cc: Jeremy Fitzhardinge
    Cc: Grant Likely
    Cc: Adrian McMenamin
    Cc: Stephen Rothwell
    Cc: Bartlomiej Zolnierkiewicz
    Cc: Borislav Petkov
    Cc: Sergei Shtylyov
    Cc: Alex Dubov
    Cc: Pierre Ossman
    Cc: David Woodhouse
    Cc: Markus Lidel
    Cc: Stefan Weinhuber
    Cc: Martin Schwidefsky
    Cc: Pete Zaitcev
    Cc: FUJITA Tomonori
    Signed-off-by: Jens Axboe

    Tejun Heo
     
  • 296b2f6ae   block: convert to dequeueing model (easy ones) ... Browse Code »

    plat-omap/mailbox, floppy, viocd, mspro_block, i2o_block and
    mmc/card/queue are already pretty close to dequeueing model and can be
    converted with simple changes. Convert them.

    While at it,

    * xen-blkfront: !fs check moved downwards to share dequeue call with
    normal path.

    * mspro_block: __blk_end_request(..., blk_rq_cur_byte()) converted to
    __blk_end_request_cur()

    * mmc/card/queue: loop of __blk_end_request() converted to
    __blk_end_request_all()

    [ Impact: dequeue in-flight request ]

    Signed-off-by: Tejun Heo
    Cc: Rusty Russell
    Cc: Jeremy Fitzhardinge
    Cc: Stephen Rothwell
    Cc: Alex Dubov
    Cc: Markus Lidel
    Cc: Pierre Ossman
    Signed-off-by: Jens Axboe

    Tejun Heo
     

28 Apr, 2009

2 commits

  • ec24751a6   arm-omap: don't abuse rq->data ... Browse Code »

    omap mailbox uses rq->data as the second opaque pointer to carry
    mbox_msg_t and rq->special message argument which is needed only for
    tx. Add and use omap_msg_tx_data struct for tx and use rq->special
    for mbox_msg_t for rx such that only rq->special is used as opaque
    pointer.

    [ Impact: cleanup rq->data usage, extra kmalloc in msg_send ]

    Signed-off-by: Tejun Heo
    Cc: Russell King

    Tejun Heo
     
  • 40cbbb781   block: implement and use [__]blk_end_request_all() ... Browse Code »

    There are many [__]blk_end_request() call sites which call it with
    full request length and expect full completion. Many of them ensure
    that the request actually completes by doing BUG_ON() the return
    value, which is awkward and error-prone.

    This patch adds [__]blk_end_request_all() which takes @rq and @error
    and fully completes the request. BUG_ON() is added to to ensure that
    this actually happens.

    Most conversions are simple but there are a few noteworthy ones.

    * cdrom/viocd: viocd_end_request() replaced with direct calls to
    __blk_end_request_all().

    * s390/block/dasd: dasd_end_request() replaced with direct calls to
    __blk_end_request_all().

    * s390/char/tape_block: tapeblock_end_request() replaced with direct
    calls to blk_end_request_all().

    [ Impact: cleanup ]

    Signed-off-by: Tejun Heo
    Cc: Russell King
    Cc: Stephen Rothwell
    Cc: Mike Miller
    Cc: Martin Schwidefsky
    Cc: Jeff Garzik
    Cc: Rusty Russell
    Cc: Jeremy Fitzhardinge
    Cc: Alex Dubov
    Cc: James Bottomley

    Tejun Heo
     

24 Mar, 2009

4 commits

06 Sep, 2008

1 commit