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    Subject[tip:timers/core] sched: deadline: Use hrtimer_start()
    Commit-ID:  cc9684d3c1188ac5f1cf0ee9f8be7ba456099d7b
    Gitweb: http://git.kernel.org/tip/cc9684d3c1188ac5f1cf0ee9f8be7ba456099d7b
    Author: Thomas Gleixner <tglx@linutronix.de>
    AuthorDate: Tue, 14 Apr 2015 21:09:06 +0000
    Committer: Thomas Gleixner <tglx@linutronix.de>
    CommitDate: Wed, 22 Apr 2015 17:06:51 +0200

    sched: deadline: Use hrtimer_start()

    hrtimer_start() does not longer defer already expired timers to the
    softirq. Get rid of the __hrtimer_start_range_ns() invocation.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Acked-by: Peter Zijlstra <peterz@infradead.org>
    Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
    Cc: Viresh Kumar <viresh.kumar@linaro.org>
    Cc: Marcelo Tosatti <mtosatti@redhat.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Link: http://lkml.kernel.org/r/20150414203502.627353666@linutronix.de
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    kernel/sched/deadline.c | 12 ++----------
    1 file changed, 2 insertions(+), 10 deletions(-)

    diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
    index 5e95145..21d6907 100644
    --- a/kernel/sched/deadline.c
    +++ b/kernel/sched/deadline.c
    @@ -503,8 +503,6 @@ static int start_dl_timer(struct sched_dl_entity *dl_se, bool boosted)
    struct dl_rq *dl_rq = dl_rq_of_se(dl_se);
    struct rq *rq = rq_of_dl_rq(dl_rq);
    ktime_t now, act;
    - ktime_t soft, hard;
    - unsigned long range;
    s64 delta;

    if (boosted)
    @@ -527,15 +525,9 @@ static int start_dl_timer(struct sched_dl_entity *dl_se, bool boosted)
    if (ktime_us_delta(act, now) < 0)
    return 0;

    - hrtimer_set_expires(&dl_se->dl_timer, act);
    + hrtimer_start(&dl_se->dl_timer, act, HRTIMER_MODE_ABS);

    - soft = hrtimer_get_softexpires(&dl_se->dl_timer);
    - hard = hrtimer_get_expires(&dl_se->dl_timer);
    - range = ktime_to_ns(ktime_sub(hard, soft));
    - __hrtimer_start_range_ns(&dl_se->dl_timer, soft,
    - range, HRTIMER_MODE_ABS, 0);
    -
    - return hrtimer_active(&dl_se->dl_timer);
    + return 1;
    }

    /*

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