1 files changed, 0 insertions, 152 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
deleted file mode 100644
index a2dcceb9437..00000000000
--- a/kernel/softlockup.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * Detect Soft Lockups
- *
- * started by Ingo Molnar, (C) 2005, Red Hat
- *
- * this code detects soft lockups: incidents in where on a CPU
- * the kernel does not reschedule for 10 seconds or more.
- */
-
-#include <linux/mm.h>
-#include <linux/cpu.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/kthread.h>
-#include <linux/notifier.h>
-#include <linux/module.h>
-
-static DEFINE_SPINLOCK(print_lock);
-
-static DEFINE_PER_CPU(unsigned long, timestamp) = 0;
-static DEFINE_PER_CPU(unsigned long, print_timestamp) = 0;
-static DEFINE_PER_CPU(struct task_struct *, watchdog_task);
-
-static int did_panic = 0;
-static int softlock_panic(struct notifier_block *this, unsigned long event,
-				void *ptr)
-{
-	did_panic = 1;
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block panic_block = {
-	.notifier_call = softlock_panic,
-};
-
-void touch_softlockup_watchdog(void)
-{
-	per_cpu(timestamp, raw_smp_processor_id()) = jiffies;
-}
-EXPORT_SYMBOL(touch_softlockup_watchdog);
-
-/*
- * This callback runs from the timer interrupt, and checks
- * whether the watchdog thread has hung or not:
- */
-void softlockup_tick(struct pt_regs *regs)
-{
-	int this_cpu = smp_processor_id();
-	unsigned long timestamp = per_cpu(timestamp, this_cpu);
-
-	if (per_cpu(print_timestamp, this_cpu) == timestamp)
-		return;
-
-	/* Do not cause a second panic when there already was one */
-	if (did_panic)
-		return;
-
-	if (time_after(jiffies, timestamp + 10*HZ)) {
-		per_cpu(print_timestamp, this_cpu) = timestamp;
-
-		spin_lock(&print_lock);
-		printk(KERN_ERR "BUG: soft lockup detected on CPU#%d!\n",
-			this_cpu);
-		show_regs(regs);
-		spin_unlock(&print_lock);
-	}
-}
-
-/*
- * The watchdog thread - runs every second and touches the timestamp.
- */
-static int watchdog(void * __bind_cpu)
-{
-	struct sched_param param = { .sched_priority = 99 };
-	int this_cpu = (long) __bind_cpu;
-
-	printk("softlockup thread %d started up.\n", this_cpu);
-
-	sched_setscheduler(current, SCHED_FIFO, &param);
-	current->flags |= PF_NOFREEZE;
-
-	set_current_state(TASK_INTERRUPTIBLE);
-
-	/*
-	 * Run briefly once per second - if this gets delayed for
-	 * more than 10 seconds then the debug-printout triggers
-	 * in softlockup_tick():
-	 */
-	while (!kthread_should_stop()) {
-		msleep_interruptible(1000);
-		touch_softlockup_watchdog();
-	}
-	__set_current_state(TASK_RUNNING);
-
-	return 0;
-}
-
-/*
- * Create/destroy watchdog threads as CPUs come and go:
- */
-static int __devinit
-cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
-{
-	int hotcpu = (unsigned long)hcpu;
-	struct task_struct *p;
-
-	switch (action) {
-	case CPU_UP_PREPARE:
-		BUG_ON(per_cpu(watchdog_task, hotcpu));
-		p = kthread_create(watchdog, hcpu, "watchdog/%d", hotcpu);
-		if (IS_ERR(p)) {
-			printk("watchdog for %i failed\n", hotcpu);
-			return NOTIFY_BAD;
-		}
-  		per_cpu(watchdog_task, hotcpu) = p;
-		kthread_bind(p, hotcpu);
- 		break;
-	case CPU_ONLINE:
-
-		wake_up_process(per_cpu(watchdog_task, hotcpu));
-		break;
-#ifdef CONFIG_HOTPLUG_CPU
-	case CPU_UP_CANCELED:
-		/* Unbind so it can run.  Fall thru. */
-		kthread_bind(per_cpu(watchdog_task, hotcpu),
-			     any_online_cpu(cpu_online_map));
-	case CPU_DEAD:
-		p = per_cpu(watchdog_task, hotcpu);
-		per_cpu(watchdog_task, hotcpu) = NULL;
-		kthread_stop(p);
-		break;
-#endif /* CONFIG_HOTPLUG_CPU */
- 	}
-	return NOTIFY_OK;
-}
-
-static struct notifier_block __devinitdata cpu_nfb = {
-	.notifier_call = cpu_callback
-};
-
-__init void spawn_softlockup_task(void)
-{
-	void *cpu = (void *)(long)smp_processor_id();
-
-	cpu_callback(&cpu_nfb, CPU_UP_PREPARE, cpu);
-	cpu_callback(&cpu_nfb, CPU_ONLINE, cpu);
-	register_cpu_notifier(&cpu_nfb);
-
-	notifier_chain_register(&panic_notifier_list, &panic_block);
-}
-