--- /dev/null
+/*
+ * workqueue.h --- work queue handling for Linux.
+ */
+
+#ifndef _LINUX_WORKQUEUE_H
+#define _LINUX_WORKQUEUE_H
+
+#include <linux/timer.h>
+#include <linux/linkage.h>
+#include <linux/bitops.h>
+#include <linux/lockdep.h>
+#include <asm/atomic.h>
+
+struct workqueue_struct;
+
+struct work_struct;
+typedef void (*work_func_t)(struct work_struct *work);
+
+/*
+ * The first word is the work queue pointer and the flags rolled into
+ * one
+ */
+#define work_data_bits(work) ((unsigned long *)(&(work)->data))
+
+struct work_struct {
+ atomic_long_t data;
+#define WORK_STRUCT_PENDING 0 /* T if work item pending execution */
+#define WORK_STRUCT_FLAG_MASK (3UL)
+#define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK)
+ struct list_head entry;
+ work_func_t func;
+#ifdef CONFIG_LOCKDEP
+ struct lockdep_map lockdep_map;
+#endif
+};
+
+#define WORK_DATA_INIT() ATOMIC_LONG_INIT(0)
+
+struct delayed_work {
+ struct work_struct work;
+ struct timer_list timer;
+};
+
+struct execute_work {
+ struct work_struct work;
+};
+
+#ifdef CONFIG_LOCKDEP
+/*
+ * NB: because we have to copy the lockdep_map, setting _key
+ * here is required, otherwise it could get initialised to the
+ * copy of the lockdep_map!
+ */
+#define __WORK_INIT_LOCKDEP_MAP(n, k) \
+ .lockdep_map = STATIC_LOCKDEP_MAP_INIT(n, k),
+#else
+#define __WORK_INIT_LOCKDEP_MAP(n, k)
+#endif
+
+#define __WORK_INITIALIZER(n, f) { \
+ .data = WORK_DATA_INIT(), \
+ .entry = { &(n).entry, &(n).entry }, \
+ .func = (f), \
+ __WORK_INIT_LOCKDEP_MAP(#n, &(n)) \
+ }
+
+#define __DELAYED_WORK_INITIALIZER(n, f) { \
+ .work = __WORK_INITIALIZER((n).work, (f)), \
+ .timer = TIMER_INITIALIZER(NULL, 0, 0), \
+ }
+
+#define DECLARE_WORK(n, f) \
+ struct work_struct n = __WORK_INITIALIZER(n, f)
+
+#define DECLARE_DELAYED_WORK(n, f) \
+ struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f)
+
+/*
+ * initialize a work item's function pointer
+ */
+#define PREPARE_WORK(_work, _func) \
+ do { \
+ (_work)->func = (_func); \
+ } while (0)
+
+#define PREPARE_DELAYED_WORK(_work, _func) \
+ PREPARE_WORK(&(_work)->work, (_func))
+
+/*
+ * initialize all of a work item in one go
+ *
+ * NOTE! No point in using "atomic_long_set()": useing a direct
+ * assignment of the work data initializer allows the compiler
+ * to generate better code.
+ */
+#ifdef CONFIG_LOCKDEP
+#define INIT_WORK(_work, _func) \
+ do { \
+ static struct lock_class_key __key; \
+ \
+ (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \
+ lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0);\
+ INIT_LIST_HEAD(&(_work)->entry); \
+ PREPARE_WORK((_work), (_func)); \
+ } while (0)
+#else
+#define INIT_WORK(_work, _func) \
+ do { \
+ (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \
+ INIT_LIST_HEAD(&(_work)->entry); \
+ PREPARE_WORK((_work), (_func)); \
+ } while (0)
+#endif
+
+#define INIT_DELAYED_WORK(_work, _func) \
+ do { \
+ INIT_WORK(&(_work)->work, (_func)); \
+ init_timer(&(_work)->timer); \
+ } while (0)
+
+#define INIT_DELAYED_WORK_ON_STACK(_work, _func) \
+ do { \
+ INIT_WORK(&(_work)->work, (_func)); \
+ init_timer_on_stack(&(_work)->timer); \
+ } while (0)
+
+#define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \
+ do { \
+ INIT_WORK(&(_work)->work, (_func)); \
+ init_timer_deferrable(&(_work)->timer); \
+ } while (0)
+
+#define INIT_DELAYED_WORK_ON_STACK(_work, _func) \
+ do { \
+ INIT_WORK(&(_work)->work, (_func)); \
+ init_timer_on_stack(&(_work)->timer); \
+ } while (0)
+
+/**
+ * work_pending - Find out whether a work item is currently pending
+ * @work: The work item in question
+ */
+#define work_pending(work) \
+ test_bit(WORK_STRUCT_PENDING, work_data_bits(work))
+
+/**
+ * delayed_work_pending - Find out whether a delayable work item is currently
+ * pending
+ * @work: The work item in question
+ */
+#define delayed_work_pending(w) \
+ work_pending(&(w)->work)
+
+/**
+ * work_clear_pending - for internal use only, mark a work item as not pending
+ * @work: The work item in question
+ */
+#define work_clear_pending(work) \
+ clear_bit(WORK_STRUCT_PENDING, work_data_bits(work))
+
+
+extern struct workqueue_struct *
+__create_workqueue_key(const char *name, int singlethread,
+ int freezeable, int rt, struct lock_class_key *key,
+ const char *lock_name);
+
+#ifdef CONFIG_LOCKDEP
+#define __create_workqueue(name, singlethread, freezeable, rt) \
+({ \
+ static struct lock_class_key __key; \
+ const char *__lock_name; \
+ \
+ if (__builtin_constant_p(name)) \
+ __lock_name = (name); \
+ else \
+ __lock_name = #name; \
+ \
+ __create_workqueue_key((name), (singlethread), \
+ (freezeable), (rt), &__key, \
+ __lock_name); \
+})
+#else
+#define __create_workqueue(name, singlethread, freezeable, rt) \
+ __create_workqueue_key((name), (singlethread), (freezeable), (rt), \
+ NULL, NULL)
+#endif
+
+#define create_workqueue(name) __create_workqueue((name), 0, 0, 0)
+#define create_rt_workqueue(name) __create_workqueue((name), 0, 0, 1)
+#define create_freezeable_workqueue(name) __create_workqueue((name), 1, 1, 0)
+#define create_singlethread_workqueue(name) __create_workqueue((name), 1, 0, 0)
+
+extern void destroy_workqueue(struct workqueue_struct *wq);
+
+extern int queue_work(struct workqueue_struct *wq, struct work_struct *work);
+extern int queue_work_on(int cpu, struct workqueue_struct *wq,
+ struct work_struct *work);
+extern int queue_delayed_work(struct workqueue_struct *wq,
+ struct delayed_work *work, unsigned long delay);
+extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
+ struct delayed_work *work, unsigned long delay);
+
+extern void flush_workqueue(struct workqueue_struct *wq);
+extern void flush_scheduled_work(void);
+
+extern int schedule_work(struct work_struct *work);
+extern int schedule_work_on(int cpu, struct work_struct *work);
+extern int schedule_delayed_work(struct delayed_work *work, unsigned long delay);
+extern int schedule_delayed_work_on(int cpu, struct delayed_work *work,
+ unsigned long delay);
+extern int schedule_on_each_cpu(work_func_t func);
+extern int current_is_keventd(void);
+extern int keventd_up(void);
+
+extern void init_workqueues(void);
+int execute_in_process_context(work_func_t fn, struct execute_work *);
+
+extern int flush_work(struct work_struct *work);
+
+extern int cancel_work_sync(struct work_struct *work);
+
+/*
+ * Kill off a pending schedule_delayed_work(). Note that the work callback
+ * function may still be running on return from cancel_delayed_work(), unless
+ * it returns 1 and the work doesn't re-arm itself. Run flush_workqueue() or
+ * cancel_work_sync() to wait on it.
+ */
+static inline int cancel_delayed_work(struct delayed_work *work)
+{
+ int ret;
+
+ ret = del_timer_sync(&work->timer);
+ if (ret)
+ work_clear_pending(&work->work);
+ return ret;
+}
+
+extern int cancel_delayed_work_sync(struct delayed_work *work);
+
+/* Obsolete. use cancel_delayed_work_sync() */
+static inline
+void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq,
+ struct delayed_work *work)
+{
+ cancel_delayed_work_sync(work);
+}
+
+/* Obsolete. use cancel_delayed_work_sync() */
+static inline
+void cancel_rearming_delayed_work(struct delayed_work *work)
+{
+ cancel_delayed_work_sync(work);
+}
+
+#ifndef CONFIG_SMP
+static inline long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg)
+{
+ return fn(arg);
+}
+#else
+long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg);
+#endif /* CONFIG_SMP */
+#endif
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