sched: Remove the cfs_rq dependency from set_task_cpu()

[safe/jmp/linux-2.6] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index cc40bda..f92ce63 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2004,32 +2004,6 @@ static inline void check_class_changed(struct rq *rq, struct task_struct *p,
                p->sched_class->prio_changed(rq, p, oldprio, running);
 }
 
-/**
- * kthread_bind - bind a just-created kthread to a cpu.
- * @p: thread created by kthread_create().
- * @cpu: cpu (might not be online, must be possible) for @k to run on.
- *
- * Description: This function is equivalent to set_cpus_allowed(),
- * except that @cpu doesn't need to be online, and the thread must be
- * stopped (i.e., just returned from kthread_create()).
- *
- * Function lives here instead of kthread.c because it messes with
- * scheduler internals which require locking.
- */
-void kthread_bind(struct task_struct *p, unsigned int cpu)
-{
-       /* Must have done schedule() in kthread() before we set_task_cpu */
-       if (!wait_task_inactive(p, TASK_UNINTERRUPTIBLE)) {
-               WARN_ON(1);
-               return;
-       }
-
-       p->cpus_allowed = cpumask_of_cpu(cpu);
-       p->rt.nr_cpus_allowed = 1;
-       p->flags |= PF_THREAD_BOUND;
-}
-EXPORT_SYMBOL(kthread_bind);
-
 #ifdef CONFIG_SMP
 /*
  * Is this task likely cache-hot:
@@ -2064,8 +2038,6 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
 void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
 {
        int old_cpu = task_cpu(p);
-       struct cfs_rq *old_cfsrq = task_cfs_rq(p),
-                     *new_cfsrq = cpu_cfs_rq(old_cfsrq, new_cpu);
 
 #ifdef CONFIG_SCHED_DEBUG
        /*
@@ -2082,8 +2054,6 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
                perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS,
                                     1, 1, NULL, 0);
        }
-       p->se.vruntime -= old_cfsrq->min_vruntime -
-                                        new_cfsrq->min_vruntime;
 
        __set_task_cpu(p, new_cpu);
 }
@@ -2438,6 +2408,10 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state,
        if (task_contributes_to_load(p))
                rq->nr_uninterruptible--;
        p->state = TASK_WAKING;
+
+       if (p->sched_class->task_waking)
+               p->sched_class->task_waking(rq, p);
+
        __task_rq_unlock(rq);
 
        cpu = select_task_rq(p, SD_BALANCE_WAKE, wake_flags);
@@ -2501,8 +2475,8 @@ out_running:
 
        p->state = TASK_RUNNING;
 #ifdef CONFIG_SMP
-       if (p->sched_class->task_wake_up)
-               p->sched_class->task_wake_up(rq, p);
+       if (p->sched_class->task_woken)
+               p->sched_class->task_woken(rq, p);
 
        if (unlikely(rq->idle_stamp)) {
                u64 delta = rq->clock - rq->idle_stamp;
@@ -2692,8 +2666,8 @@ void wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
        trace_sched_wakeup_new(rq, p, 1);
        check_preempt_curr(rq, p, WF_FORK);
 #ifdef CONFIG_SMP
-       if (p->sched_class->task_wake_up)
-               p->sched_class->task_wake_up(rq, p);
+       if (p->sched_class->task_woken)
+               p->sched_class->task_woken(rq, p);
 #endif
        task_rq_unlock(rq, &flags);
 }
@@ -10124,7 +10098,7 @@ void sched_move_task(struct task_struct *tsk)
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
        if (tsk->sched_class->moved_group)
-               tsk->sched_class->moved_group(tsk);
+               tsk->sched_class->moved_group(tsk, on_rq);
 #endif
 
        if (unlikely(running))