sched: simplify bonus calculation #2

current code:

 delta = calc_delta_mine(delta_exec, curr->load.weight, lw);
 delta = min((u64)delta, cfs_rq->sleeper_bonus);

Notice that this calc_delta_mine() line is exactly delta_mine, which
gives:

 delta = min((u64)delta_mine, cfs_rq->sleeper_bonus);
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/sched_fair.c

@@ -303,8 +303,7 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr)
 	delta_mine = calc_delta_mine(delta_exec, curr->load.weight, lw);
 
 	if (cfs_rq->sleeper_bonus > sysctl_sched_granularity) {
-		delta = calc_delta_mine(delta_exec, curr->load.weight, lw);
-		delta = min((u64)delta, cfs_rq->sleeper_bonus);
+		delta = min((u64)delta_mine, cfs_rq->sleeper_bonus);
 		delta = min(delta, (unsigned long)(
 			(long)sysctl_sched_runtime_limit - curr->wait_runtime));
 		cfs_rq->sleeper_bonus -= delta;