[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / workqueue.h

/*
 * 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))

enum {
	WORK_STRUCT_PENDING_BIT	= 0,	/* work item is pending execution */
	WORK_STRUCT_LINKED_BIT	= 1,	/* next work is linked to this one */
#ifdef CONFIG_DEBUG_OBJECTS_WORK
	WORK_STRUCT_STATIC_BIT	= 2,	/* static initializer (debugobjects) */
	WORK_STRUCT_COLOR_SHIFT	= 3,	/* color for workqueue flushing */
#else
	WORK_STRUCT_COLOR_SHIFT	= 2,	/* color for workqueue flushing */
#endif

	WORK_STRUCT_COLOR_BITS	= 4,

	WORK_STRUCT_PENDING	= 1 << WORK_STRUCT_PENDING_BIT,
	WORK_STRUCT_LINKED	= 1 << WORK_STRUCT_LINKED_BIT,
#ifdef CONFIG_DEBUG_OBJECTS_WORK
	WORK_STRUCT_STATIC	= 1 << WORK_STRUCT_STATIC_BIT,
#else
	WORK_STRUCT_STATIC	= 0,
#endif

	/*
	 * The last color is no color used for works which don't
	 * participate in workqueue flushing.
	 */
	WORK_NR_COLORS		= (1 << WORK_STRUCT_COLOR_BITS) - 1,
	WORK_NO_COLOR		= WORK_NR_COLORS,

	/*
	 * Reserve 6 bits off of cwq pointer w/ debugobjects turned
	 * off.  This makes cwqs aligned to 64 bytes which isn't too
	 * excessive while allowing 15 workqueue flush colors.
	 */
	WORK_STRUCT_FLAG_BITS	= WORK_STRUCT_COLOR_SHIFT +
				  WORK_STRUCT_COLOR_BITS,

	WORK_STRUCT_FLAG_MASK	= (1UL << WORK_STRUCT_FLAG_BITS) - 1,
	WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK,
};

struct work_struct {
	atomic_long_t data;
	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)
#define WORK_DATA_STATIC_INIT()	ATOMIC_LONG_INIT(WORK_STRUCT_STATIC)

struct delayed_work {
	struct work_struct work;
	struct timer_list timer;
};

static inline struct delayed_work *to_delayed_work(struct work_struct *work)
{
	return container_of(work, struct delayed_work, work);
}

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_STATIC_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))

#ifdef CONFIG_DEBUG_OBJECTS_WORK
extern void __init_work(struct work_struct *work, int onstack);
extern void destroy_work_on_stack(struct work_struct *work);
static inline unsigned int work_static(struct work_struct *work)
{
	return *work_data_bits(work) & WORK_STRUCT_STATIC;
}
#else
static inline void __init_work(struct work_struct *work, int onstack) { }
static inline void destroy_work_on_stack(struct work_struct *work) { }
static inline unsigned int work_static(struct work_struct *work) { return 0; }
#endif

/*
 * initialize all of a work item in one go
 *
 * NOTE! No point in using "atomic_long_set()": using a direct
 * assignment of the work data initializer allows the compiler
 * to generate better code.
 */
#ifdef CONFIG_LOCKDEP
#define __INIT_WORK(_work, _func, _onstack)				\
	do {								\
		static struct lock_class_key __key;			\
									\
		__init_work((_work), _onstack);				\
		(_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, _onstack)				\
	do {								\
		__init_work((_work), _onstack);				\
		(_work)->data = (atomic_long_t) WORK_DATA_INIT();	\
		INIT_LIST_HEAD(&(_work)->entry);			\
		PREPARE_WORK((_work), (_func));				\
	} while (0)
#endif

#define INIT_WORK(_work, _func)					\
	do {							\
		__INIT_WORK((_work), (_func), 0);		\
	} while (0)

#define INIT_WORK_ON_STACK(_work, _func)			\
	do {							\
		__INIT_WORK((_work), (_func), 1);		\
	} while (0)

#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_ON_STACK(&(_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)

/**
 * 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_BIT, 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_BIT, work_data_bits(work))

enum {
	WQ_FREEZEABLE		= 1 << 0, /* freeze during suspend */
	WQ_SINGLE_THREAD	= 1 << 1, /* no per-cpu worker */
};

extern struct workqueue_struct *
__create_workqueue_key(const char *name, unsigned int flags, int max_active,
		       struct lock_class_key *key, const char *lock_name);

#ifdef CONFIG_LOCKDEP
#define __create_workqueue(name, flags, max_active)		\
({								\
	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), (flags), (max_active),	\
				&__key, __lock_name);		\
})
#else
#define __create_workqueue(name, flags, max_active)		\
	__create_workqueue_key((name), (flags), (max_active), NULL, NULL)
#endif

#define create_workqueue(name)					\
	__create_workqueue((name), 0, 1)
#define create_freezeable_workqueue(name)			\
	__create_workqueue((name), WQ_FREEZEABLE | WQ_SINGLE_THREAD, 1)
#define create_singlethread_workqueue(name)			\
	__create_workqueue((name), WQ_SINGLE_THREAD, 1)

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 void flush_delayed_work(struct delayed_work *work);

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;
}

/*
 * Like above, but uses del_timer() instead of del_timer_sync(). This means,
 * if it returns 0 the timer function may be running and the queueing is in
 * progress.
 */
static inline int __cancel_delayed_work(struct delayed_work *work)
{
	int ret;

	ret = del_timer(&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
Commit	Line	Data
1da177e4 LT	1	/*
	2	* workqueue.h --- work queue handling for Linux.
	3	*/
	4
	5	#ifndef _LINUX_WORKQUEUE_H
	6	#define _LINUX_WORKQUEUE_H
	7
	8	#include <linux/timer.h>
	9	#include <linux/linkage.h>
	10	#include <linux/bitops.h>
4e6045f1	11	#include <linux/lockdep.h>
a08727ba	12	#include <asm/atomic.h>
1da177e4 LT	13
	14	struct workqueue_struct;
	15
65f27f38 DH	16	struct work_struct;
65f27f38 DH	17	typedef void (work_func_t)(struct work_struct work);
6bb49e59	18
a08727ba LT	19	/*
	20	* The first word is the work queue pointer and the flags rolled into
	21	* one
	22	*/
	23	#define work_data_bits(work) ((unsigned long *)(&(work)->data))
	24
22df02bb TH	25	enum {
22df02bb TH	26	WORK_STRUCT_PENDING_BIT = 0, /* work item is pending execution */
affee4b2	27	WORK_STRUCT_LINKED_BIT = 1, /* next work is linked to this one */
22df02bb	28	#ifdef CONFIG_DEBUG_OBJECTS_WORK
affee4b2	29	WORK_STRUCT_STATIC_BIT = 2, /* static initializer (debugobjects) */
73f53c4a	30	WORK_STRUCT_COLOR_SHIFT = 3, /* color for workqueue flushing */
0f900049	31	#else
73f53c4a	32	WORK_STRUCT_COLOR_SHIFT = 2, /* color for workqueue flushing */
22df02bb TH	33	#endif
22df02bb TH	34
73f53c4a TH	35	WORK_STRUCT_COLOR_BITS = 4,
73f53c4a TH	36
22df02bb	37	WORK_STRUCT_PENDING = 1 << WORK_STRUCT_PENDING_BIT,
affee4b2	38	WORK_STRUCT_LINKED = 1 << WORK_STRUCT_LINKED_BIT,
22df02bb TH	39	#ifdef CONFIG_DEBUG_OBJECTS_WORK
	40	WORK_STRUCT_STATIC = 1 << WORK_STRUCT_STATIC_BIT,
	41	#else
	42	WORK_STRUCT_STATIC = 0,
	43	#endif
	44
73f53c4a TH	45	/*
	46	* The last color is no color used for works which don't
	47	* participate in workqueue flushing.
	48	*/
	49	WORK_NR_COLORS = (1 << WORK_STRUCT_COLOR_BITS) - 1,
	50	WORK_NO_COLOR = WORK_NR_COLORS,
	51
	52	/*
	53	* Reserve 6 bits off of cwq pointer w/ debugobjects turned
	54	* off. This makes cwqs aligned to 64 bytes which isn't too
	55	* excessive while allowing 15 workqueue flush colors.
	56	*/
	57	WORK_STRUCT_FLAG_BITS = WORK_STRUCT_COLOR_SHIFT +
	58	WORK_STRUCT_COLOR_BITS,
	59
0f900049	60	WORK_STRUCT_FLAG_MASK = (1UL << WORK_STRUCT_FLAG_BITS) - 1,
22df02bb TH	61	WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK,
	62	};
	63
1da177e4	64	struct work_struct {
a08727ba	65	atomic_long_t data;
1da177e4	66	struct list_head entry;
6bb49e59	67	work_func_t func;
4e6045f1 JB	68	#ifdef CONFIG_LOCKDEP
	69	struct lockdep_map lockdep_map;
	70	#endif
52bad64d DH	71	};
52bad64d DH	72
23b2e599	73	#define WORK_DATA_INIT() ATOMIC_LONG_INIT(0)
22df02bb	74	#define WORK_DATA_STATIC_INIT() ATOMIC_LONG_INIT(WORK_STRUCT_STATIC)
a08727ba	75
52bad64d DH	76	struct delayed_work {
52bad64d DH	77	struct work_struct work;
1da177e4 LT	78	struct timer_list timer;
	79	};
	80
bf6aede7 JD	81	static inline struct delayed_work to_delayed_work(struct work_struct work)
	82	{
	83	return container_of(work, struct delayed_work, work);
	84	}
	85
1fa44eca JB	86	struct execute_work {
	87	struct work_struct work;
	88	};
	89
4e6045f1 JB	90	#ifdef CONFIG_LOCKDEP
	91	/*
	92	* NB: because we have to copy the lockdep_map, setting _key
	93	* here is required, otherwise it could get initialised to the
	94	* copy of the lockdep_map!
	95	*/
	96	#define __WORK_INIT_LOCKDEP_MAP(n, k) \
	97	.lockdep_map = STATIC_LOCKDEP_MAP_INIT(n, k),
	98	#else
	99	#define __WORK_INIT_LOCKDEP_MAP(n, k)
	100	#endif
	101
65f27f38	102	#define __WORK_INITIALIZER(n, f) { \
dc186ad7	103	.data = WORK_DATA_STATIC_INIT(), \
23b2e599	104	.entry = { &(n).entry, &(n).entry }, \
65f27f38	105	.func = (f), \
4e6045f1	106	__WORK_INIT_LOCKDEP_MAP(#n, &(n)) \
65f27f38 DH	107	}
	108
	109	#define __DELAYED_WORK_INITIALIZER(n, f) { \
	110	.work = __WORK_INITIALIZER((n).work, (f)), \
	111	.timer = TIMER_INITIALIZER(NULL, 0, 0), \
	112	}
	113
65f27f38 DH	114	#define DECLARE_WORK(n, f) \
	115	struct work_struct n = __WORK_INITIALIZER(n, f)
	116
65f27f38 DH	117	#define DECLARE_DELAYED_WORK(n, f) \
	118	struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f)
	119
1da177e4	120	/*
65f27f38	121	* initialize a work item's function pointer
1da177e4	122	*/
65f27f38	123	#define PREPARE_WORK(_work, _func) \
1da177e4	124	do { \
52bad64d	125	(_work)->func = (_func); \
1da177e4 LT	126	} while (0)
1da177e4 LT	127
65f27f38 DH	128	#define PREPARE_DELAYED_WORK(_work, _func) \
65f27f38 DH	129	PREPARE_WORK(&(_work)->work, (_func))
52bad64d	130
dc186ad7 TG	131	#ifdef CONFIG_DEBUG_OBJECTS_WORK
	132	extern void __init_work(struct work_struct *work, int onstack);
	133	extern void destroy_work_on_stack(struct work_struct *work);
4690c4ab TH	134	static inline unsigned int work_static(struct work_struct *work)
4690c4ab TH	135	{
22df02bb	136	return *work_data_bits(work) & WORK_STRUCT_STATIC;
4690c4ab	137	}
dc186ad7 TG	138	#else
	139	static inline void __init_work(struct work_struct *work, int onstack) { }
	140	static inline void destroy_work_on_stack(struct work_struct *work) { }
4690c4ab	141	static inline unsigned int work_static(struct work_struct *work) { return 0; }
dc186ad7 TG	142	#endif
dc186ad7 TG	143
1da177e4	144	/*
52bad64d	145	* initialize all of a work item in one go
a08727ba	146	*
b9049df5	147	* NOTE! No point in using "atomic_long_set()": using a direct
a08727ba LT	148	* assignment of the work data initializer allows the compiler
a08727ba LT	149	* to generate better code.
1da177e4	150	*/
4e6045f1	151	#ifdef CONFIG_LOCKDEP
dc186ad7	152	#define __INIT_WORK(_work, _func, _onstack) \
65f27f38	153	do { \
4e6045f1 JB	154	static struct lock_class_key __key; \
4e6045f1 JB	155	\
dc186ad7	156	__init_work((_work), _onstack); \
23b2e599	157	(_work)->data = (atomic_long_t) WORK_DATA_INIT(); \
4e6045f1	158	lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0);\
65f27f38 DH	159	INIT_LIST_HEAD(&(_work)->entry); \
	160	PREPARE_WORK((_work), (_func)); \
	161	} while (0)
4e6045f1	162	#else
dc186ad7	163	#define __INIT_WORK(_work, _func, _onstack) \
4e6045f1	164	do { \
dc186ad7	165	__init_work((_work), _onstack); \
4e6045f1 JB	166	(_work)->data = (atomic_long_t) WORK_DATA_INIT(); \
	167	INIT_LIST_HEAD(&(_work)->entry); \
	168	PREPARE_WORK((_work), (_func)); \
	169	} while (0)
	170	#endif
65f27f38	171
dc186ad7 TG	172	#define INIT_WORK(_work, _func) \
	173	do { \
	174	__INIT_WORK((_work), (_func), 0); \
	175	} while (0)
	176
	177	#define INIT_WORK_ON_STACK(_work, _func) \
	178	do { \
	179	__INIT_WORK((_work), (_func), 1); \
	180	} while (0)
	181
65f27f38 DH	182	#define INIT_DELAYED_WORK(_work, _func) \
	183	do { \
	184	INIT_WORK(&(_work)->work, (_func)); \
	185	init_timer(&(_work)->timer); \
52bad64d DH	186	} while (0)
52bad64d DH	187
6d612b0f PZ	188	#define INIT_DELAYED_WORK_ON_STACK(_work, _func) \
6d612b0f PZ	189	do { \
dc186ad7	190	INIT_WORK_ON_STACK(&(_work)->work, (_func)); \
6d612b0f PZ	191	init_timer_on_stack(&(_work)->timer); \
	192	} while (0)
	193
dc186ad7	194	#define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \
28287033 VP	195	do { \
	196	INIT_WORK(&(_work)->work, (_func)); \
	197	init_timer_deferrable(&(_work)->timer); \
	198	} while (0)
	199
365970a1 DH	200	/**
	201	* work_pending - Find out whether a work item is currently pending
	202	* @work: The work item in question
	203	*/
	204	#define work_pending(work) \
22df02bb	205	test_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))
365970a1 DH	206
	207	/**
	208	* delayed_work_pending - Find out whether a delayable work item is currently
	209	* pending
	210	* @work: The work item in question
	211	*/
0221872a LT	212	#define delayed_work_pending(w) \
0221872a LT	213	work_pending(&(w)->work)
365970a1	214
65f27f38	215	/**
23b2e599 ON	216	* work_clear_pending - for internal use only, mark a work item as not pending
23b2e599 ON	217	* @work: The work item in question
65f27f38	218	*/
23b2e599	219	#define work_clear_pending(work) \
22df02bb	220	clear_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))
65f27f38	221
97e37d7b TH	222	enum {
	223	WQ_FREEZEABLE = 1 << 0, /* freeze during suspend */
	224	WQ_SINGLE_THREAD = 1 << 1, /* no per-cpu worker */
	225	};
52bad64d	226
4e6045f1	227	extern struct workqueue_struct *
1e19ffc6	228	__create_workqueue_key(const char *name, unsigned int flags, int max_active,
c790bce0	229	struct lock_class_key key, const char lock_name);
4e6045f1 JB	230
4e6045f1 JB	231	#ifdef CONFIG_LOCKDEP
1e19ffc6	232	#define __create_workqueue(name, flags, max_active) \
4e6045f1 JB	233	({ \
4e6045f1 JB	234	static struct lock_class_key __key; \
eb13ba87 JB	235	const char *__lock_name; \
	236	\
	237	if (__builtin_constant_p(name)) \
	238	__lock_name = (name); \
	239	else \
	240	__lock_name = #name; \
4e6045f1	241	\
1e19ffc6 TH	242	__create_workqueue_key((name), (flags), (max_active), \
1e19ffc6 TH	243	&__key, __lock_name); \
4e6045f1 JB	244	})
4e6045f1 JB	245	#else
1e19ffc6 TH	246	#define __create_workqueue(name, flags, max_active) \
1e19ffc6 TH	247	__create_workqueue_key((name), (flags), (max_active), NULL, NULL)
4e6045f1 JB	248	#endif
4e6045f1 JB	249
97e37d7b	250	#define create_workqueue(name) \
1e19ffc6	251	__create_workqueue((name), 0, 1)
97e37d7b	252	#define create_freezeable_workqueue(name) \
1e19ffc6	253	__create_workqueue((name), WQ_FREEZEABLE \| WQ_SINGLE_THREAD, 1)
97e37d7b	254	#define create_singlethread_workqueue(name) \
1e19ffc6	255	__create_workqueue((name), WQ_SINGLE_THREAD, 1)
1da177e4 LT	256
	257	extern void destroy_workqueue(struct workqueue_struct *wq);
	258
b3c97528	259	extern int queue_work(struct workqueue_struct wq, struct work_struct work);
c1a220e7 ZR	260	extern int queue_work_on(int cpu, struct workqueue_struct *wq,
c1a220e7 ZR	261	struct work_struct *work);
b3c97528 HH	262	extern int queue_delayed_work(struct workqueue_struct *wq,
b3c97528 HH	263	struct delayed_work *work, unsigned long delay);
7a6bc1cd	264	extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
28e53bdd ON	265	struct delayed_work *work, unsigned long delay);
28e53bdd ON	266
b3c97528	267	extern void flush_workqueue(struct workqueue_struct *wq);
28e53bdd	268	extern void flush_scheduled_work(void);
43046b60	269	extern void flush_delayed_work(struct delayed_work *work);
1da177e4	270
b3c97528	271	extern int schedule_work(struct work_struct *work);
c1a220e7	272	extern int schedule_work_on(int cpu, struct work_struct *work);
b3c97528	273	extern int schedule_delayed_work(struct delayed_work *work, unsigned long delay);
28e53bdd ON	274	extern int schedule_delayed_work_on(int cpu, struct delayed_work *work,
28e53bdd ON	275	unsigned long delay);
65f27f38	276	extern int schedule_on_each_cpu(work_func_t func);
1da177e4 LT	277	extern int current_is_keventd(void);
	278	extern int keventd_up(void);
	279
	280	extern void init_workqueues(void);
65f27f38	281	int execute_in_process_context(work_func_t fn, struct execute_work *);
1da177e4	282
db700897 ON	283	extern int flush_work(struct work_struct *work);
db700897 ON	284
1f1f642e	285	extern int cancel_work_sync(struct work_struct *work);
28e53bdd	286
1da177e4 LT	287	/*
1da177e4 LT	288	* Kill off a pending schedule_delayed_work(). Note that the work callback
071b6386 ON	289	* function may still be running on return from cancel_delayed_work(), unless
071b6386 ON	290	* it returns 1 and the work doesn't re-arm itself. Run flush_workqueue() or
28e53bdd	291	* cancel_work_sync() to wait on it.
1da177e4	292	*/
52bad64d	293	static inline int cancel_delayed_work(struct delayed_work *work)
1da177e4 LT	294	{
	295	int ret;
	296
223a10a9	297	ret = del_timer_sync(&work->timer);
1da177e4	298	if (ret)
23b2e599	299	work_clear_pending(&work->work);
1da177e4 LT	300	return ret;
	301	}
	302
4e49627b ON	303	/*
	304	* Like above, but uses del_timer() instead of del_timer_sync(). This means,
	305	* if it returns 0 the timer function may be running and the queueing is in
	306	* progress.
	307	*/
	308	static inline int __cancel_delayed_work(struct delayed_work *work)
	309	{
	310	int ret;
	311
	312	ret = del_timer(&work->timer);
	313	if (ret)
	314	work_clear_pending(&work->work);
	315	return ret;
	316	}
	317
1f1f642e	318	extern int cancel_delayed_work_sync(struct delayed_work *work);
1634c48f	319
f5a421a4	320	/* Obsolete. use cancel_delayed_work_sync() */
1634c48f ON	321	static inline
	322	void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq,
	323	struct delayed_work *work)
	324	{
f5a421a4 ON	325	cancel_delayed_work_sync(work);
	326	}
	327
	328	/* Obsolete. use cancel_delayed_work_sync() */
	329	static inline
	330	void cancel_rearming_delayed_work(struct delayed_work *work)
	331	{
	332	cancel_delayed_work_sync(work);
1634c48f ON	333	}
1634c48f ON	334
2d3854a3 RR	335	#ifndef CONFIG_SMP
	336	static inline long work_on_cpu(unsigned int cpu, long (fn)(void ), void *arg)
	337	{
	338	return fn(arg);
	339	}
	340	#else
	341	long work_on_cpu(unsigned int cpu, long (fn)(void ), void *arg);
	342	#endif /* CONFIG_SMP */
1da177e4	343	#endif