sched: rework enqueue/dequeue_entity() to get rid of set_curr_task()

rework enqueue/dequeue_entity() to get rid of 
sched_class::set_curr_task(). This simplifies sched_setscheduler(), 
rt_mutex_setprio() and sched_move_tasks().

   text    data     bss     dec     hex filename
  24330    2734      20   27084    69cc sched.o.before
  24233    2730      20   26983    6967 sched.o.after

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 5 deletions

diff --git a/kernel/sched_idletask.c b/kernel/sched_idletask.c
index 5ebf829cdd73..3503fb2d9f96 100644
--- a/kernel/sched_idletask.c
+++ b/kernel/sched_idletask.c
@@ -50,10 +50,6 @@ static void task_tick_idle(struct rq *rq, struct task_struct *curr)
 {
 }
 
-static void set_curr_task_idle(struct rq *rq)
-{
-}
-
 /*
  * Simple, special scheduling class for the per-CPU idle tasks:
  */
@@ -70,7 +66,6 @@ static struct sched_class idle_sched_class __read_mostly = {
 
         .load_balance           = load_balance_idle,
 
-        .set_curr_task          = set_curr_task_idle,
         .task_tick              = task_tick_idle,
         /* no .task_new for idle tasks */
 };