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    Subject[PATCH 0/4][RFC] jump label: introduce default true branch
    Hi Peter,

    I've introduced a new static_branch_def_true() construct, such that the straight
    line path is the true branch, and we patch a jump to get to the false branch.
    In order to make jump_label_inc()/dec() work as 'make true'/'make false' with
    counting, I've had to update some of the core jump label code. This patchset also
    introduces: JUMP_LABEL_INIT_TRUE/FALSE, so that keys should be initialized as:

    struct jump_label_key true_key = JUMP_LABEL_INIT_TRUE;

    or

    struct jump_label_key false_key = JUMP_LABEL_INIT_FALSE;

    I think this patch series should address the issues that came up with sched_feat()
    implementation.

    Thanks,

    -Jason

    Jason Baron (4):
    jump label: Introduce default true branch + API update
    perf: Make use of updated jump label API.
    tracepoints: update to use new jump label API.
    sched: Make use of new jump label API.

    include/linux/jump_label.h | 77 ++++++++++++++++++++++++++++++++++++-------
    include/linux/perf_event.h | 6 ++--
    include/linux/tracepoint.h | 4 +-
    kernel/jump_label.c | 66 +++++++++++++++++++++++++------------
    kernel/sched/core.c | 12 +++---
    kernel/sched/fair.c | 2 +-
    kernel/sched/sched.h | 11 +------
    kernel/tracepoint.c | 12 +++---
    8 files changed, 128 insertions(+), 62 deletions(-)

    --
    1.7.7.3



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