1 files changed, 0 insertions, 1038 deletions

diff --git a/libdde_linux26/lib/src/kernel/workqueue.c b/libdde_linux26/lib/src/kernel/workqueue.c
deleted file mode 100644
index 5ad26d9f..00000000
--- a/libdde_linux26/lib/src/kernel/workqueue.c
+++ /dev/null
@@ -1,1038 +0,0 @@
-/*
- * linux/kernel/workqueue.c
- *
- * Generic mechanism for defining kernel helper threads for running
- * arbitrary tasks in process context.
- *
- * Started by Ingo Molnar, Copyright (C) 2002
- *
- * Derived from the taskqueue/keventd code by:
- *
- *   David Woodhouse <dwmw2@infradead.org>
- *   Andrew Morton
- *   Kai Petzke <wpp@marie.physik.tu-berlin.de>
- *   Theodore Ts'o <tytso@mit.edu>
- *
- * Made to use alloc_percpu by Christoph Lameter.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/signal.h>
-#include <linux/completion.h>
-#include <linux/workqueue.h>
-#include <linux/slab.h>
-#include <linux/cpu.h>
-#include <linux/notifier.h>
-#include <linux/kthread.h>
-#include <linux/hardirq.h>
-#include <linux/mempolicy.h>
-#include <linux/freezer.h>
-#include <linux/kallsyms.h>
-#include <linux/debug_locks.h>
-#include <linux/lockdep.h>
-
-#ifdef DDE_LINUX
-#include "local.h"
-#endif
-
-/*
- * The per-CPU workqueue (if single thread, we always use the first
- * possible cpu).
- */
-struct cpu_workqueue_struct {
-
-	spinlock_t lock;
-
-	struct list_head worklist;
-	wait_queue_head_t more_work;
-	struct work_struct *current_work;
-
-	struct workqueue_struct *wq;
-	struct task_struct *thread;
-
-	int run_depth;		/* Detect run_workqueue() recursion depth */
-} ____cacheline_aligned;
-
-/*
- * The externally visible workqueue abstraction is an array of
- * per-CPU workqueues:
- */
-struct workqueue_struct {
-	struct cpu_workqueue_struct *cpu_wq;
-	struct list_head list;
-	const char *name;
-	int singlethread;
-	int freezeable;		/* Freeze threads during suspend */
-	int rt;
-#ifdef CONFIG_LOCKDEP
-	struct lockdep_map lockdep_map;
-#endif
-};
-
-/* Serializes the accesses to the list of workqueues. */
-static DEFINE_SPINLOCK(workqueue_lock);
-static LIST_HEAD(workqueues);
-
-static int singlethread_cpu __read_mostly;
-static const struct cpumask *cpu_singlethread_map __read_mostly;
-/*
- * _cpu_down() first removes CPU from cpu_online_map, then CPU_DEAD
- * flushes cwq->worklist. This means that flush_workqueue/wait_on_work
- * which comes in between can't use for_each_online_cpu(). We could
- * use cpu_possible_map, the cpumask below is more a documentation
- * than optimization.
- */
-static cpumask_var_t cpu_populated_map __read_mostly;
-
-/* If it's single threaded, it isn't in the list of workqueues. */
-static inline int is_wq_single_threaded(struct workqueue_struct *wq)
-{
-	return wq->singlethread;
-}
-
-static const struct cpumask *wq_cpu_map(struct workqueue_struct *wq)
-{
-	return is_wq_single_threaded(wq)
-		? cpu_singlethread_map : cpu_populated_map;
-}
-
-static
-struct cpu_workqueue_struct *wq_per_cpu(struct workqueue_struct *wq, int cpu)
-{
-	if (unlikely(is_wq_single_threaded(wq)))
-		cpu = singlethread_cpu;
-	return per_cpu_ptr(wq->cpu_wq, cpu);
-}
-
-/*
- * Set the workqueue on which a work item is to be run
- * - Must *only* be called if the pending flag is set
- */
-static inline void set_wq_data(struct work_struct *work,
-				struct cpu_workqueue_struct *cwq)
-{
-	unsigned long new;
-
-	BUG_ON(!work_pending(work));
-
-	new = (unsigned long) cwq | (1UL << WORK_STRUCT_PENDING);
-	new |= WORK_STRUCT_FLAG_MASK & *work_data_bits(work);
-	atomic_long_set(&work->data, new);
-}
-
-static inline
-struct cpu_workqueue_struct *get_wq_data(struct work_struct *work)
-{
-	return (void *) (atomic_long_read(&work->data) & WORK_STRUCT_WQ_DATA_MASK);
-}
-
-static void insert_work(struct cpu_workqueue_struct *cwq,
-			struct work_struct *work, struct list_head *head)
-{
-	set_wq_data(work, cwq);
-	/*
-	 * Ensure that we get the right work->data if we see the
-	 * result of list_add() below, see try_to_grab_pending().
-	 */
-	smp_wmb();
-	list_add_tail(&work->entry, head);
-	wake_up(&cwq->more_work);
-}
-
-static void __queue_work(struct cpu_workqueue_struct *cwq,
-			 struct work_struct *work)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&cwq->lock, flags);
-	insert_work(cwq, work, &cwq->worklist);
-	spin_unlock_irqrestore(&cwq->lock, flags);
-}
-
-/**
- * queue_work - queue work on a workqueue
- * @wq: workqueue to use
- * @work: work to queue
- *
- * Returns 0 if @work was already on a queue, non-zero otherwise.
- *
- * We queue the work to the CPU on which it was submitted, but if the CPU dies
- * it can be processed by another CPU.
- */
-int queue_work(struct workqueue_struct *wq, struct work_struct *work)
-{
-	int ret;
-
-	ret = queue_work_on(get_cpu(), wq, work);
-	put_cpu();
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(queue_work);
-
-/**
- * queue_work_on - queue work on specific cpu
- * @cpu: CPU number to execute work on
- * @wq: workqueue to use
- * @work: work to queue
- *
- * Returns 0 if @work was already on a queue, non-zero otherwise.
- *
- * We queue the work to a specific CPU, the caller must ensure it
- * can't go away.
- */
-int
-queue_work_on(int cpu, struct workqueue_struct *wq, struct work_struct *work)
-{
-	int ret = 0;
-
-	if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
-		BUG_ON(!list_empty(&work->entry));
-		__queue_work(wq_per_cpu(wq, cpu), work);
-		ret = 1;
-	}
-	return ret;
-}
-EXPORT_SYMBOL_GPL(queue_work_on);
-
-static void delayed_work_timer_fn(unsigned long __data)
-{
-	struct delayed_work *dwork = (struct delayed_work *)__data;
-	struct cpu_workqueue_struct *cwq = get_wq_data(&dwork->work);
-	struct workqueue_struct *wq = cwq->wq;
-
-	__queue_work(wq_per_cpu(wq, smp_processor_id()), &dwork->work);
-}
-
-/**
- * queue_delayed_work - queue work on a workqueue after delay
- * @wq: workqueue to use
- * @dwork: delayable work to queue
- * @delay: number of jiffies to wait before queueing
- *
- * Returns 0 if @work was already on a queue, non-zero otherwise.
- */
-int queue_delayed_work(struct workqueue_struct *wq,
-			struct delayed_work *dwork, unsigned long delay)
-{
-	if (delay == 0)
-		return queue_work(wq, &dwork->work);
-
-	return queue_delayed_work_on(-1, wq, dwork, delay);
-}
-EXPORT_SYMBOL_GPL(queue_delayed_work);
-
-/**
- * queue_delayed_work_on - queue work on specific CPU after delay
- * @cpu: CPU number to execute work on
- * @wq: workqueue to use
- * @dwork: work to queue
- * @delay: number of jiffies to wait before queueing
- *
- * Returns 0 if @work was already on a queue, non-zero otherwise.
- */
-int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
-			struct delayed_work *dwork, unsigned long delay)
-{
-	int ret = 0;
-	struct timer_list *timer = &dwork->timer;
-	struct work_struct *work = &dwork->work;
-
-	if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
-		BUG_ON(timer_pending(timer));
-		BUG_ON(!list_empty(&work->entry));
-
-		timer_stats_timer_set_start_info(&dwork->timer);
-
-		/* This stores cwq for the moment, for the timer_fn */
-		set_wq_data(work, wq_per_cpu(wq, raw_smp_processor_id()));
-		timer->expires = jiffies + delay;
-		timer->data = (unsigned long)dwork;
-		timer->function = delayed_work_timer_fn;
-
-		if (unlikely(cpu >= 0))
-			add_timer_on(timer, cpu);
-		else
-			add_timer(timer);
-		ret = 1;
-	}
-	return ret;
-}
-EXPORT_SYMBOL_GPL(queue_delayed_work_on);
-
-static void run_workqueue(struct cpu_workqueue_struct *cwq)
-{
-	spin_lock_irq(&cwq->lock);
-	cwq->run_depth++;
-	if (cwq->run_depth > 3) {
-		/* morton gets to eat his hat */
-		printk("%s: recursion depth exceeded: %d\n",
-			__func__, cwq->run_depth);
-		dump_stack();
-	}
-	while (!list_empty(&cwq->worklist)) {
-		struct work_struct *work = list_entry(cwq->worklist.next,
-						struct work_struct, entry);
-		work_func_t f = work->func;
-#ifdef CONFIG_LOCKDEP
-		/*
-		 * It is permissible to free the struct work_struct
-		 * from inside the function that is called from it,
-		 * this we need to take into account for lockdep too.
-		 * To avoid bogus "held lock freed" warnings as well
-		 * as problems when looking into work->lockdep_map,
-		 * make a copy and use that here.
-		 */
-		struct lockdep_map lockdep_map = work->lockdep_map;
-#endif
-
-		cwq->current_work = work;
-		list_del_init(cwq->worklist.next);
-		spin_unlock_irq(&cwq->lock);
-
-		BUG_ON(get_wq_data(work) != cwq);
-		work_clear_pending(work);
-		lock_map_acquire(&cwq->wq->lockdep_map);
-		lock_map_acquire(&lockdep_map);
-		f(work);
-		lock_map_release(&lockdep_map);
-		lock_map_release(&cwq->wq->lockdep_map);
-
-		if (unlikely(in_atomic() || lockdep_depth(current) > 0)) {
-			printk(KERN_ERR "BUG: workqueue leaked lock or atomic: "
-					"%s/0x%08x/%d\n",
-					current->comm, preempt_count(),
-				       	task_pid_nr(current));
-#ifndef DDE_LINUX
-			printk(KERN_ERR "    last function: ");
-			print_symbol("%s\n", (unsigned long)f);
-			debug_show_held_locks(current);
-			dump_stack();
-#endif /* DDE_LINUX */
-		}
-
-		spin_lock_irq(&cwq->lock);
-		cwq->current_work = NULL;
-	}
-	cwq->run_depth--;
-	spin_unlock_irq(&cwq->lock);
-}
-
-static int worker_thread(void *__cwq)
-{
-	struct cpu_workqueue_struct *cwq = __cwq;
-	DEFINE_WAIT(wait);
-
-	if (cwq->wq->freezeable)
-		set_freezable();
-
-	set_user_nice(current, -5);
-
-	for (;;) {
-		prepare_to_wait(&cwq->more_work, &wait, TASK_INTERRUPTIBLE);
-		if (!freezing(current) &&
-		    !kthread_should_stop() &&
-		    list_empty(&cwq->worklist))
-			schedule();
-		finish_wait(&cwq->more_work, &wait);
-
-		try_to_freeze();
-
-		if (kthread_should_stop())
-			break;
-
-		run_workqueue(cwq);
-	}
-
-	return 0;
-}
-
-struct wq_barrier {
-	struct work_struct	work;
-	struct completion	done;
-};
-
-static void wq_barrier_func(struct work_struct *work)
-{
-	struct wq_barrier *barr = container_of(work, struct wq_barrier, work);
-	complete(&barr->done);
-}
-
-static void insert_wq_barrier(struct cpu_workqueue_struct *cwq,
-			struct wq_barrier *barr, struct list_head *head)
-{
-	INIT_WORK(&barr->work, wq_barrier_func);
-	__set_bit(WORK_STRUCT_PENDING, work_data_bits(&barr->work));
-
-	init_completion(&barr->done);
-
-	insert_work(cwq, &barr->work, head);
-}
-
-static int flush_cpu_workqueue(struct cpu_workqueue_struct *cwq)
-{
-	int active;
-
-	if (cwq->thread == current) {
-		/*
-		 * Probably keventd trying to flush its own queue. So simply run
-		 * it by hand rather than deadlocking.
-		 */
-		run_workqueue(cwq);
-		active = 1;
-	} else {
-		struct wq_barrier barr;
-
-		active = 0;
-		spin_lock_irq(&cwq->lock);
-		if (!list_empty(&cwq->worklist) || cwq->current_work != NULL) {
-			insert_wq_barrier(cwq, &barr, &cwq->worklist);
-			active = 1;
-		}
-		spin_unlock_irq(&cwq->lock);
-
-		if (active)
-			wait_for_completion(&barr.done);
-	}
-
-	return active;
-}
-
-/**
- * flush_workqueue - ensure that any scheduled work has run to completion.
- * @wq: workqueue to flush
- *
- * Forces execution of the workqueue and blocks until its completion.
- * This is typically used in driver shutdown handlers.
- *
- * We sleep until all works which were queued on entry have been handled,
- * but we are not livelocked by new incoming ones.
- *
- * This function used to run the workqueues itself.  Now we just wait for the
- * helper threads to do it.
- */
-void flush_workqueue(struct workqueue_struct *wq)
-{
-	const struct cpumask *cpu_map = wq_cpu_map(wq);
-	int cpu;
-
-	might_sleep();
-	lock_map_acquire(&wq->lockdep_map);
-	lock_map_release(&wq->lockdep_map);
-	for_each_cpu_mask_nr(cpu, *cpu_map)
-		flush_cpu_workqueue(per_cpu_ptr(wq->cpu_wq, cpu));
-}
-EXPORT_SYMBOL_GPL(flush_workqueue);
-
-/**
- * flush_work - block until a work_struct's callback has terminated
- * @work: the work which is to be flushed
- *
- * Returns false if @work has already terminated.
- *
- * It is expected that, prior to calling flush_work(), the caller has
- * arranged for the work to not be requeued, otherwise it doesn't make
- * sense to use this function.
- */
-int flush_work(struct work_struct *work)
-{
-	struct cpu_workqueue_struct *cwq;
-	struct list_head *prev;
-	struct wq_barrier barr;
-
-	might_sleep();
-	cwq = get_wq_data(work);
-	if (!cwq)
-		return 0;
-
-	lock_map_acquire(&cwq->wq->lockdep_map);
-	lock_map_release(&cwq->wq->lockdep_map);
-
-	prev = NULL;
-	spin_lock_irq(&cwq->lock);
-	if (!list_empty(&work->entry)) {
-		/*
-		 * See the comment near try_to_grab_pending()->smp_rmb().
-		 * If it was re-queued under us we are not going to wait.
-		 */
-		smp_rmb();
-		if (unlikely(cwq != get_wq_data(work)))
-			goto out;
-		prev = &work->entry;
-	} else {
-		if (cwq->current_work != work)
-			goto out;
-		prev = &cwq->worklist;
-	}
-	insert_wq_barrier(cwq, &barr, prev->next);
-out:
-	spin_unlock_irq(&cwq->lock);
-	if (!prev)
-		return 0;
-
-	wait_for_completion(&barr.done);
-	return 1;
-}
-EXPORT_SYMBOL_GPL(flush_work);
-
-/*
- * Upon a successful return (>= 0), the caller "owns" WORK_STRUCT_PENDING bit,
- * so this work can't be re-armed in any way.
- */
-static int try_to_grab_pending(struct work_struct *work)
-{
-	struct cpu_workqueue_struct *cwq;
-	int ret = -1;
-
-	if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work)))
-		return 0;
-
-	/*
-	 * The queueing is in progress, or it is already queued. Try to
-	 * steal it from ->worklist without clearing WORK_STRUCT_PENDING.
-	 */
-
-	cwq = get_wq_data(work);
-	if (!cwq)
-		return ret;
-
-	spin_lock_irq(&cwq->lock);
-	if (!list_empty(&work->entry)) {
-		/*
-		 * This work is queued, but perhaps we locked the wrong cwq.
-		 * In that case we must see the new value after rmb(), see
-		 * insert_work()->wmb().
-		 */
-		smp_rmb();
-		if (cwq == get_wq_data(work)) {
-			list_del_init(&work->entry);
-			ret = 1;
-		}
-	}
-	spin_unlock_irq(&cwq->lock);
-
-	return ret;
-}
-
-static void wait_on_cpu_work(struct cpu_workqueue_struct *cwq,
-				struct work_struct *work)
-{
-	struct wq_barrier barr;
-	int running = 0;
-
-	spin_lock_irq(&cwq->lock);
-	if (unlikely(cwq->current_work == work)) {
-		insert_wq_barrier(cwq, &barr, cwq->worklist.next);
-		running = 1;
-	}
-	spin_unlock_irq(&cwq->lock);
-
-	if (unlikely(running))
-		wait_for_completion(&barr.done);
-}
-
-static void wait_on_work(struct work_struct *work)
-{
-	struct cpu_workqueue_struct *cwq;
-	struct workqueue_struct *wq;
-	const struct cpumask *cpu_map;
-	int cpu;
-
-	might_sleep();
-
-	lock_map_acquire(&work->lockdep_map);
-	lock_map_release(&work->lockdep_map);
-
-	cwq = get_wq_data(work);
-	if (!cwq)
-		return;
-
-	wq = cwq->wq;
-	cpu_map = wq_cpu_map(wq);
-
-	for_each_cpu_mask_nr(cpu, *cpu_map)
-		wait_on_cpu_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
-}
-
-static int __cancel_work_timer(struct work_struct *work,
-				struct timer_list* timer)
-{
-	int ret;
-
-	do {
-		ret = (timer && likely(del_timer(timer)));
-		if (!ret)
-			ret = try_to_grab_pending(work);
-		wait_on_work(work);
-	} while (unlikely(ret < 0));
-
-	work_clear_pending(work);
-	return ret;
-}
-
-/**
- * cancel_work_sync - block until a work_struct's callback has terminated
- * @work: the work which is to be flushed
- *
- * Returns true if @work was pending.
- *
- * cancel_work_sync() will cancel the work if it is queued. If the work's
- * callback appears to be running, cancel_work_sync() will block until it
- * has completed.
- *
- * It is possible to use this function if the work re-queues itself. It can
- * cancel the work even if it migrates to another workqueue, however in that
- * case it only guarantees that work->func() has completed on the last queued
- * workqueue.
- *
- * cancel_work_sync(&delayed_work->work) should be used only if ->timer is not
- * pending, otherwise it goes into a busy-wait loop until the timer expires.
- *
- * The caller must ensure that workqueue_struct on which this work was last
- * queued can't be destroyed before this function returns.
- */
-int cancel_work_sync(struct work_struct *work)
-{
-	return __cancel_work_timer(work, NULL);
-}
-EXPORT_SYMBOL_GPL(cancel_work_sync);
-
-/**
- * cancel_delayed_work_sync - reliably kill off a delayed work.
- * @dwork: the delayed work struct
- *
- * Returns true if @dwork was pending.
- *
- * It is possible to use this function if @dwork rearms itself via queue_work()
- * or queue_delayed_work(). See also the comment for cancel_work_sync().
- */
-int cancel_delayed_work_sync(struct delayed_work *dwork)
-{
-	return __cancel_work_timer(&dwork->work, &dwork->timer);
-}
-EXPORT_SYMBOL(cancel_delayed_work_sync);
-
-static struct workqueue_struct *keventd_wq __read_mostly;
-
-/**
- * schedule_work - put work task in global workqueue
- * @work: job to be done
- *
- * This puts a job in the kernel-global workqueue.
- */
-int schedule_work(struct work_struct *work)
-{
-	return queue_work(keventd_wq, work);
-}
-EXPORT_SYMBOL(schedule_work);
-
-/*
- * schedule_work_on - put work task on a specific cpu
- * @cpu: cpu to put the work task on
- * @work: job to be done
- *
- * This puts a job on a specific cpu
- */
-int schedule_work_on(int cpu, struct work_struct *work)
-{
-	return queue_work_on(cpu, keventd_wq, work);
-}
-EXPORT_SYMBOL(schedule_work_on);
-
-/**
- * schedule_delayed_work - put work task in global workqueue after delay
- * @dwork: job to be done
- * @delay: number of jiffies to wait or 0 for immediate execution
- *
- * After waiting for a given time this puts a job in the kernel-global
- * workqueue.
- */
-int schedule_delayed_work(struct delayed_work *dwork,
-					unsigned long delay)
-{
-	return queue_delayed_work(keventd_wq, dwork, delay);
-}
-EXPORT_SYMBOL(schedule_delayed_work);
-
-/**
- * schedule_delayed_work_on - queue work in global workqueue on CPU after delay
- * @cpu: cpu to use
- * @dwork: job to be done
- * @delay: number of jiffies to wait
- *
- * After waiting for a given time this puts a job in the kernel-global
- * workqueue on the specified CPU.
- */
-int schedule_delayed_work_on(int cpu,
-			struct delayed_work *dwork, unsigned long delay)
-{
-	return queue_delayed_work_on(cpu, keventd_wq, dwork, delay);
-}
-EXPORT_SYMBOL(schedule_delayed_work_on);
-
-/**
- * schedule_on_each_cpu - call a function on each online CPU from keventd
- * @func: the function to call
- *
- * Returns zero on success.
- * Returns -ve errno on failure.
- *
- * schedule_on_each_cpu() is very slow.
- */
-int schedule_on_each_cpu(work_func_t func)
-{
-	int cpu;
-	struct work_struct *works;
-
-	works = alloc_percpu(struct work_struct);
-	if (!works)
-		return -ENOMEM;
-
-	get_online_cpus();
-	for_each_online_cpu(cpu) {
-		struct work_struct *work = per_cpu_ptr(works, cpu);
-
-		INIT_WORK(work, func);
-		schedule_work_on(cpu, work);
-	}
-	for_each_online_cpu(cpu)
-		flush_work(per_cpu_ptr(works, cpu));
-	put_online_cpus();
-	free_percpu(works);
-	return 0;
-}
-
-void flush_scheduled_work(void)
-{
-	flush_workqueue(keventd_wq);
-}
-EXPORT_SYMBOL(flush_scheduled_work);
-
-/**
- * execute_in_process_context - reliably execute the routine with user context
- * @fn:		the function to execute
- * @ew:		guaranteed storage for the execute work structure (must
- *		be available when the work executes)
- *
- * Executes the function immediately if process context is available,
- * otherwise schedules the function for delayed execution.
- *
- * Returns:	0 - function was executed
- *		1 - function was scheduled for execution
- */
-int execute_in_process_context(work_func_t fn, struct execute_work *ew)
-{
-	if (!in_interrupt()) {
-		fn(&ew->work);
-		return 0;
-	}
-
-	INIT_WORK(&ew->work, fn);
-	schedule_work(&ew->work);
-
-	return 1;
-}
-EXPORT_SYMBOL_GPL(execute_in_process_context);
-
-int keventd_up(void)
-{
-	return keventd_wq != NULL;
-}
-
-int current_is_keventd(void)
-{
-	struct cpu_workqueue_struct *cwq;
-	int cpu = raw_smp_processor_id(); /* preempt-safe: keventd is per-cpu */
-	int ret = 0;
-
-	BUG_ON(!keventd_wq);
-
-	cwq = per_cpu_ptr(keventd_wq->cpu_wq, cpu);
-	if (current == cwq->thread)
-		ret = 1;
-
-	return ret;
-
-}
-
-static struct cpu_workqueue_struct *
-init_cpu_workqueue(struct workqueue_struct *wq, int cpu)
-{
-	struct cpu_workqueue_struct *cwq = per_cpu_ptr(wq->cpu_wq, cpu);
-
-	cwq->wq = wq;
-	spin_lock_init(&cwq->lock);
-	INIT_LIST_HEAD(&cwq->worklist);
-	init_waitqueue_head(&cwq->more_work);
-
-	return cwq;
-}
-
-static int create_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
-{
-	struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
-	struct workqueue_struct *wq = cwq->wq;
-	const char *fmt = is_wq_single_threaded(wq) ? "%s" : "%s/%d";
-	struct task_struct *p;
-
-	p = kthread_create(worker_thread, cwq, fmt, wq->name, cpu);
-	/*
-	 * Nobody can add the work_struct to this cwq,
-	 *	if (caller is __create_workqueue)
-	 *		nobody should see this wq
-	 *	else // caller is CPU_UP_PREPARE
-	 *		cpu is not on cpu_online_map
-	 * so we can abort safely.
-	 */
-	if (IS_ERR(p))
-		return PTR_ERR(p);
-	if (cwq->wq->rt)
-		sched_setscheduler_nocheck(p, SCHED_FIFO, &param);
-	cwq->thread = p;
-
-	return 0;
-}
-
-static void start_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
-{
-	struct task_struct *p = cwq->thread;
-
-	if (p != NULL) {
-		if (cpu >= 0)
-			kthread_bind(p, cpu);
-		wake_up_process(p);
-	}
-}
-
-struct workqueue_struct *__create_workqueue_key(const char *name,
-						int singlethread,
-						int freezeable,
-						int rt,
-						struct lock_class_key *key,
-						const char *lock_name)
-{
-	struct workqueue_struct *wq;
-	struct cpu_workqueue_struct *cwq;
-	int err = 0, cpu;
-
-	wq = kzalloc(sizeof(*wq), GFP_KERNEL);
-	if (!wq)
-		return NULL;
-
-	wq->cpu_wq = alloc_percpu(struct cpu_workqueue_struct);
-	if (!wq->cpu_wq) {
-		kfree(wq);
-		return NULL;
-	}
-
-	wq->name = name;
-	lockdep_init_map(&wq->lockdep_map, lock_name, key, 0);
-	wq->singlethread = singlethread;
-	wq->freezeable = freezeable;
-	wq->rt = rt;
-	INIT_LIST_HEAD(&wq->list);
-
-	if (singlethread) {
-		cwq = init_cpu_workqueue(wq, singlethread_cpu);
-		err = create_workqueue_thread(cwq, singlethread_cpu);
-		start_workqueue_thread(cwq, -1);
-	} else {
-		cpu_maps_update_begin();
-		/*
-		 * We must place this wq on list even if the code below fails.
-		 * cpu_down(cpu) can remove cpu from cpu_populated_map before
-		 * destroy_workqueue() takes the lock, in that case we leak
-		 * cwq[cpu]->thread.
-		 */
-		spin_lock(&workqueue_lock);
-		list_add(&wq->list, &workqueues);
-		spin_unlock(&workqueue_lock);
-		/*
-		 * We must initialize cwqs for each possible cpu even if we
-		 * are going to call destroy_workqueue() finally. Otherwise
-		 * cpu_up() can hit the uninitialized cwq once we drop the
-		 * lock.
-		 */
-		for_each_possible_cpu(cpu) {
-			cwq = init_cpu_workqueue(wq, cpu);
-			if (err || !cpu_online(cpu))
-				continue;
-			err = create_workqueue_thread(cwq, cpu);
-			start_workqueue_thread(cwq, cpu);
-		}
-		cpu_maps_update_done();
-	}
-
-	if (err) {
-		destroy_workqueue(wq);
-		wq = NULL;
-	}
-	return wq;
-}
-EXPORT_SYMBOL_GPL(__create_workqueue_key);
-
-static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq)
-{
-	/*
-	 * Our caller is either destroy_workqueue() or CPU_POST_DEAD,
-	 * cpu_add_remove_lock protects cwq->thread.
-	 */
-	if (cwq->thread == NULL)
-		return;
-
-	lock_map_acquire(&cwq->wq->lockdep_map);
-	lock_map_release(&cwq->wq->lockdep_map);
-
-	flush_cpu_workqueue(cwq);
-	/*
-	 * If the caller is CPU_POST_DEAD and cwq->worklist was not empty,
-	 * a concurrent flush_workqueue() can insert a barrier after us.
-	 * However, in that case run_workqueue() won't return and check
-	 * kthread_should_stop() until it flushes all work_struct's.
-	 * When ->worklist becomes empty it is safe to exit because no
-	 * more work_structs can be queued on this cwq: flush_workqueue
-	 * checks list_empty(), and a "normal" queue_work() can't use
-	 * a dead CPU.
-	 */
-	kthread_stop(cwq->thread);
-	cwq->thread = NULL;
-}
-
-/**
- * destroy_workqueue - safely terminate a workqueue
- * @wq: target workqueue
- *
- * Safely destroy a workqueue. All work currently pending will be done first.
- */
-void destroy_workqueue(struct workqueue_struct *wq)
-{
-	const struct cpumask *cpu_map = wq_cpu_map(wq);
-	int cpu;
-
-	cpu_maps_update_begin();
-	spin_lock(&workqueue_lock);
-	list_del(&wq->list);
-	spin_unlock(&workqueue_lock);
-
-	for_each_cpu_mask_nr(cpu, *cpu_map)
-		cleanup_workqueue_thread(per_cpu_ptr(wq->cpu_wq, cpu));
- 	cpu_maps_update_done();
-
-	free_percpu(wq->cpu_wq);
-	kfree(wq);
-}
-EXPORT_SYMBOL_GPL(destroy_workqueue);
-
-static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
-						unsigned long action,
-						void *hcpu)
-{
-	unsigned int cpu = (unsigned long)hcpu;
-	struct cpu_workqueue_struct *cwq;
-	struct workqueue_struct *wq;
-	int ret = NOTIFY_OK;
-
-	action &= ~CPU_TASKS_FROZEN;
-
-	switch (action) {
-	case CPU_UP_PREPARE:
-		cpumask_set_cpu(cpu, cpu_populated_map);
-	}
-undo:
-	list_for_each_entry(wq, &workqueues, list) {
-		cwq = per_cpu_ptr(wq->cpu_wq, cpu);
-
-		switch (action) {
-		case CPU_UP_PREPARE:
-			if (!create_workqueue_thread(cwq, cpu))
-				break;
-			printk(KERN_ERR "workqueue [%s] for %i failed\n",
-				wq->name, cpu);
-			action = CPU_UP_CANCELED;
-			ret = NOTIFY_BAD;
-			goto undo;
-
-		case CPU_ONLINE:
-			start_workqueue_thread(cwq, cpu);
-			break;
-
-		case CPU_UP_CANCELED:
-			start_workqueue_thread(cwq, -1);
-		case CPU_POST_DEAD:
-			cleanup_workqueue_thread(cwq);
-			break;
-		}
-	}
-
-	switch (action) {
-	case CPU_UP_CANCELED:
-	case CPU_POST_DEAD:
-		cpumask_clear_cpu(cpu, cpu_populated_map);
-	}
-
-	return ret;
-}
-
-#ifdef CONFIG_SMP
-static struct workqueue_struct *work_on_cpu_wq __read_mostly;
-
-struct work_for_cpu {
-	struct work_struct work;
-	long (*fn)(void *);
-	void *arg;
-	long ret;
-};
-
-static void do_work_for_cpu(struct work_struct *w)
-{
-	struct work_for_cpu *wfc = container_of(w, struct work_for_cpu, work);
-
-	wfc->ret = wfc->fn(wfc->arg);
-}
-
-/**
- * work_on_cpu - run a function in user context on a particular cpu
- * @cpu: the cpu to run on
- * @fn: the function to run
- * @arg: the function arg
- *
- * This will return the value @fn returns.
- * It is up to the caller to ensure that the cpu doesn't go offline.
- */
-long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg)
-{
-	struct work_for_cpu wfc;
-
-	INIT_WORK(&wfc.work, do_work_for_cpu);
-	wfc.fn = fn;
-	wfc.arg = arg;
-	queue_work_on(cpu, work_on_cpu_wq, &wfc.work);
-	flush_work(&wfc.work);
-
-	return wfc.ret;
-}
-EXPORT_SYMBOL_GPL(work_on_cpu);
-#endif /* CONFIG_SMP */
-
-void __init init_workqueues(void)
-{
-	alloc_cpumask_var(&cpu_populated_map, GFP_KERNEL);
-
-	cpumask_copy(cpu_populated_map, cpu_online_mask);
-	singlethread_cpu = cpumask_first(cpu_possible_mask);
-	cpu_singlethread_map = cpumask_of(singlethread_cpu);
-	hotcpu_notifier(workqueue_cpu_callback, 0);
-	keventd_wq = create_workqueue("events");
-	BUG_ON(!keventd_wq);
-#ifdef CONFIG_SMP
-	work_on_cpu_wq = create_workqueue("work_on_cpu");
-	BUG_ON(!work_on_cpu_wq);
-#endif
-}
-
-#ifdef DDE_LINUX
-core_initcall(init_workqueues);
-#endif