[PATCH][plugsched 3/28] Make kick_process public

[PATCH][plugsched 3/28] Make kick_process public

[Con Kolivas]

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Make kick_process public


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kick_process is common code; move it to scheduler.c

Signed-off-by: Con Kolivas <kernel@kolivas.org>

Index: linux-2.6.10-rc1-mm2-plugsched1/kernel/sched.c
===================================================================
--- linux-2.6.10-rc1-mm2-plugsched1.orig/kernel/sched.c	2004-10-30 22:00:00.168344500 +1000
+++ linux-2.6.10-rc1-mm2-plugsched1/kernel/sched.c	2004-10-30 22:00:21.376964415 +1000
@@ -901,24 +901,6 @@ repeat:
 	task_rq_unlock(rq, &flags);
 }
 
-/***
- * kick_process - kick a running thread to enter/exit the kernel
- * @p: the to-be-kicked thread
- *
- * Cause a process which is running on another CPU to enter
- * kernel-mode, without any delay. (to get signals handled.)
- */
-void kick_process(task_t *p)
-{
-	int cpu;
-
-	preempt_disable();
-	cpu = task_cpu(p);
-	if ((cpu != smp_processor_id()) && task_curr(p))
-		smp_send_reschedule(cpu);
-	preempt_enable();
-}
-
 /*
  * Return a low guess at the load of a migration-source cpu.
  *
@@ -2618,38 +2600,6 @@ static inline int dependent_sleeper(int 
 }
 #endif
 
-#if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT)
-
-void fastcall add_preempt_count(int val)
-{
-	/*
-	 * Underflow?
-	 */
-	BUG_ON(((int)preempt_count() < 0));
-	preempt_count() += val;
-	/*
-	 * Spinlock count overflowing soon?
-	 */
-	BUG_ON((preempt_count() & PREEMPT_MASK) >= PREEMPT_MASK-10);
-}
-EXPORT_SYMBOL(add_preempt_count);
-
-void fastcall sub_preempt_count(int val)
-{
-	/*
-	 * Underflow?
-	 */
-	BUG_ON(val > preempt_count());
-	/*
-	 * Is the spinlock portion underflowing?
-	 */
-	BUG_ON((val < PREEMPT_MASK) && !(preempt_count() & PREEMPT_MASK));
-	preempt_count() -= val;
-}
-EXPORT_SYMBOL(sub_preempt_count);
-
-#endif
-
 /*
  * schedule() is the main scheduler function.
  */
@@ -2826,52 +2776,6 @@ switch_tasks:
 		goto need_resched;
 }
 
-#ifdef CONFIG_PREEMPT
-/*
- * this is is the entry point to schedule() from in-kernel preemption
- * off of preempt_enable.  Kernel preemptions off return from interrupt
- * occur there and call schedule directly.
- */
-asmlinkage void __sched preempt_schedule(void)
-{
-	struct thread_info *ti = current_thread_info();
-#ifdef CONFIG_PREEMPT_BKL
-	struct task_struct *task = current;
-	int saved_lock_depth;
-#endif
-	/*
-	 * If there is a non-zero preempt_count or interrupts are disabled,
-	 * we do not want to preempt the current task.  Just return..
-	 */
-	if (unlikely(ti->preempt_count || irqs_disabled()))
-		return;
-
-need_resched:
-	add_preempt_count(PREEMPT_ACTIVE);
-	/*
-	 * We keep the big kernel semaphore locked, but we
-	 * clear ->lock_depth so that schedule() doesnt
-	 * auto-release the semaphore:
-	 */
-#ifdef CONFIG_PREEMPT_BKL
-	saved_lock_depth = task->lock_depth;
-	task->lock_depth = -1;
-#endif
-	schedule();
-#ifdef CONFIG_PREEMPT_BKL
-	task->lock_depth = saved_lock_depth;
-#endif
-	sub_preempt_count(PREEMPT_ACTIVE);
-
-	/* we could miss a preemption opportunity between schedule and now */
-	barrier();
-	if (unlikely(test_thread_flag(TIF_NEED_RESCHED)))
-		goto need_resched;
-}
-
-EXPORT_SYMBOL(preempt_schedule);
-#endif /* CONFIG_PREEMPT */
-
 int default_wake_function(wait_queue_t *curr, unsigned mode, int sync, void *key)
 {
 	task_t *p = curr->task;
Index: linux-2.6.10-rc1-mm2-plugsched1/kernel/scheduler.c
===================================================================
--- linux-2.6.10-rc1-mm2-plugsched1.orig/kernel/scheduler.c	2004-10-30 21:59:47.308394011 +1000
+++ linux-2.6.10-rc1-mm2-plugsched1/kernel/scheduler.c	2004-10-30 22:00:21.377964256 +1000
@@ -43,6 +43,26 @@
 DEFINE_PER_CPU(struct kernel_stat, kstat);
 EXPORT_PER_CPU_SYMBOL(kstat);
 
+#ifdef CONFIG_SMP
+/***
+ * kick_process - kick a running thread to enter/exit the kernel
+ * @p: the to-be-kicked thread
+ *
+ * Cause a process which is running on another CPU to enter
+ * kernel-mode, without any delay. (to get signals handled.)
+ */
+void kick_process(task_t *p)
+{
+	int cpu;
+
+	preempt_disable();
+	cpu = task_cpu(p);
+	if ((cpu != smp_processor_id()) && task_curr(p))
+		smp_send_reschedule(cpu);
+	preempt_enable();
+}
+#endif
+
 extern struct sched_drv ingo_sched_drv;
 static const struct sched_drv *scheduler = &ingo_sched_drv;
 


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