check_preempt_wakeup() of fair class needs an uptodate sched clock
value to update runtime stats of the current task.
When a task is woken up, activate_task() is usually called right before
ttwu_do_wakeup() unless the task is already in the runqueue. In this
case we need to update the rq clock
check_preempt_wakeup() of fair class needs an uptodate sched clock
value to update runtime stats of the current task.
When a task is woken up, activate_task() is usually called right before
ttwu_do_wakeup() unless the task is already in the runqueue. In this
case we need to update the rq clock
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