Eric Lee / smarc-fsl-linux-kernel

11 Nov, 2011

1 commit

  • b3e067c0b   drm: serialize access to list of debugfs files ... Browse Code »

    Nouveau, when configured with debugfs, creates debugfs files for every
    channel, so structure holding list of files needs to be protected from
    simultaneous changes by multiple threads.

    Without this patch it's possible to hit kernel oops in
    drm_debugfs_remove_files just by running a couple of xterms with
    looped glxinfo.

    Signed-off-by: Marcin Slusarz
    Reviewed-by: Daniel Vetter
    Signed-off-by: Dave Airlie

    Marcin Slusarz
     

01 Nov, 2011

1 commit

18 Oct, 2011

1 commit

04 Aug, 2011

1 commit

01 Oct, 2010

1 commit

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
     

15 Jul, 2009

1 commit

19 Jun, 2009

1 commit

16 Jun, 2009

1 commit

  • 156f5a780   debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem. ... Browse Code »

    Many developers use "/debug/" or "/debugfs/" or "/sys/kernel/debug/"
    directory name to mount debugfs filesystem for ftrace according to
    ./Documentation/tracers/ftrace.txt file.

    And, three directory names(ex:/debug/, /debugfs/, /sys/kernel/debug/) is
    existed in kernel source like ftrace, DRM, Wireless, Documentation,
    Network[sky2]files to mount debugfs filesystem.

    debugfs means debug filesystem for debugging easy to use by greg kroah
    hartman. "/sys/kernel/debug/" name is suitable as directory name
    of debugfs filesystem.
    - debugfs related reference: http://lwn.net/Articles/334546/

    Fix inconsistency of directory name to mount debugfs filesystem.

    * From Steven Rostedt
    - find_debugfs() and tracing_files() in this patch.

    Signed-off-by: GeunSik Lim
    Acked-by : Inaky Perez-Gonzalez
    Reviewed-by : Steven Rostedt
    Reviewed-by : James Smart
    CC: Jiri Kosina
    CC: David Airlie
    CC: Peter Osterlund
    CC: Ananth N Mavinakayanahalli
    CC: Anil S Keshavamurthy
    CC: Masami Hiramatsu
    Signed-off-by: Greg Kroah-Hartman

    GeunSik Lim
     

28 Mar, 2009

1 commit

  • 28a62277e   drm: Convert proc files to seq_file and introduce debugfs ... Browse Code »

    The old mechanism to formatting proc files is extremely ugly. The
    seq_file API was designed specifically for cases like this and greatly
    simplifies the process.

    Also, most of the files in /proc really don't belong there. This patch
    introduces the infrastructure for putting these into debugfs and exposes
    all of the proc files in debugfs as well.

    Signed-off-by: Ben Gamari
    Signed-off-by: Eric Anholt

    Ben Gamari