linux-kernel - [tip:sched/cleanups] sched: TIF_NEED_RESCHED -> need

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Date:	Fri, 6 Mar 2009 11:51:31 GMT
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	a.p.zijlstra@...llo.nl, tglx@...utronix.de, laijs@...fujitsu.com,
	mingo@...e.hu
Subject: [tip:sched/cleanups] sched: TIF_NEED_RESCHED -> need_reshed() cleanup

Commit-ID:  5ed0cec0ac5f1b3759bdbe4d9df32ee4ff8afb5a
Gitweb:     http://git.kernel.org/tip/5ed0cec0ac5f1b3759bdbe4d9df32ee4ff8afb5a
Author:     "Lai Jiangshan" <laijs@...fujitsu.com>
AuthorDate: Fri, 6 Mar 2009 19:40:20 +0800
Commit:     Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 6 Mar 2009 12:48:55 +0100

sched: TIF_NEED_RESCHED -> need_reshed() cleanup

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@...fujitsu.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
LKML-Reference: <49B10BA4.9070209@...fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/sched.c    |   10 +++++-----
 lib/kernel_lock.c |    2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 8b92f40..e0fa739 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -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 */
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index 01a3c22..39f1029 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -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();
 	}
--
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