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    SubjectRe: [PATCH tip 2/2] tracing: Introduce trace_buffer_{lock_reserve,unlock_commit}

    * Arnaldo Carvalho de Melo <acme@redhat.com> wrote:

    > Impact: new API
    >
    > These new functions do what previously was being open coded, reducing
    > the number of details ftrace plugin writers have to worry about.
    >
    > It also standardizes the handling of stacktrace, userstacktrace and
    > other trace options we may introduce in the future.
    >
    > With this patch, for instance, the blk tracer (and some others already
    > in the tree) can use the "userstacktrace" /d/tracing/trace_options
    > facility.
    >
    > Cc: Ingo Molnar <mingo@elte.hu>
    > Cc: Frédéric Weisbecker <fweisbec@gmail.com>
    > Cc: Jens Axboe <jens.axboe@oracle.com>
    > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    > ---
    > block/blktrace.c | 21 ++------
    > kernel/trace/kmemtrace.c | 19 ++-----
    > kernel/trace/trace.c | 94 +++++++++++++++++++++----------------
    > kernel/trace/trace.h | 11 ++++
    > kernel/trace/trace_boot.c | 20 ++------
    > kernel/trace/trace_branch.c | 7 +--
    > kernel/trace/trace_hw_branches.c | 7 +--
    > kernel/trace/trace_mmiotrace.c | 20 +++-----
    > kernel/trace/trace_power.c | 20 ++------
    > 9 files changed, 102 insertions(+), 117 deletions(-)

    Applied to tip:tracing/ftrace, thanks!

    Ingo
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