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    Subject[PATCH 0/2] tracing: Add critical section event support
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    These patches add critical section event tracing support.

    Changes since RFC [1] are:
    - Make critical events independent of the preempt/irqsoff tracer.
    - Store pointers instead of symbol names to do less in the fast path.
    - Other changes based on Steven's comments.

    Here's an example of how Android's systrace will be using it to show critical
    sections as a gantt chart: http://imgur.com/download/TZplEVp

    [1] https://patchwork.kernel.org/patch/9676579/

    Joel Fernandes (2):
    tracing: irqsoff: Move code under tracer config options
    tracing: Add support for critical section events

    include/linux/ftrace.h | 2 +-
    include/linux/irqflags.h | 3 +-
    include/trace/events/critical.h | 45 ++++++
    kernel/trace/Kconfig | 5 +
    kernel/trace/Makefile | 1 +
    kernel/trace/trace_irqsoff.c | 331 ++++++++++++++++++++++++++--------------
    6 files changed, 269 insertions(+), 118 deletions(-)
    create mode 100644 include/trace/events/critical.h

    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: kernel-team@android.com
    --
    2.14.1.581.gf28d330327-goog

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