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@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>

diff --git a/kernel/sched.c b/kernel/sched.c
index 8b92f40..e0fa739 100644 (file)
--- 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 (file)
--- 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();
        }