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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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