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sched: TIF_NEED_RESCHED -> need_reshed() cleanup

Browse source 
Impact: cleanup

Use test_tsk_need_resched(), set_tsk_need_resched(), need_resched()
instead of using TIF_NEED_RESCHED.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <49B10BA4.9070209@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Lai Jiangshan 2009-03-06 19:40:20 +08:00 committed by Ingo Molnar
parent 7fc07d8410
commit 5ed0cec0ac
2 changed files with 6 additions and 6 deletions
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10
kernel/sched.c
View file

@ -1189,10 +1189,10 @@ static void resched_task(struct task_struct *p)
assert_spin_locked(&task_rq(p)->lock);
if (unlikely(test_tsk_thread_flag(p, TIF_NEED_RESCHED)))
if (test_tsk_need_resched(p))
return;
set_tsk_thread_flag(p, TIF_NEED_RESCHED);
set_tsk_need_resched(p);
cpu = task_cpu(p);
if (cpu == smp_processor_id())
@ -1248,7 +1248,7 @@ void wake_up_idle_cpu(int cpu)
* lockless. The worst case is that the other CPU runs the
* idle task through an additional NOOP schedule()
*/
set_tsk_thread_flag(rq->idle, TIF_NEED_RESCHED);
set_tsk_need_resched(rq->idle);
/* NEED_RESCHED must be visible before we test polling */
smp_mb();
@ -4740,7 +4740,7 @@ asmlinkage void __sched preempt_schedule(void)
* between schedule and now.
*/
barrier();
} while (unlikely(test_thread_flag(TIF_NEED_RESCHED)));
} while (need_resched());
}
EXPORT_SYMBOL(preempt_schedule);
@ -4769,7 +4769,7 @@ asmlinkage void __sched preempt_schedule_irq(void)
* between schedule and now.
*/
barrier();
} while (unlikely(test_thread_flag(TIF_NEED_RESCHED)));
} while (need_resched());
}
#endif /* CONFIG_PREEMPT */

2
lib/kernel_lock.c
View file

@ -39,7 +39,7 @@ static __cacheline_aligned_in_smp DEFINE_SPINLOCK(kernel_flag);
int __lockfunc __reacquire_kernel_lock(void)
{
while (!_raw_spin_trylock(&kernel_flag)) {
if (test_thread_flag(TIF_NEED_RESCHED))
if (need_resched())
return -EAGAIN;
cpu_relax();
}