[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 */
#ifdef CONFIG_DEBUG_OBJECTS_WORK
	WORK_STRUCT_STATIC_BIT	= 1,	/* static initializer (debugobjects) */
	WORK_STRUCT_FLAG_BITS	= 2,
#else
	WORK_STRUCT_FLAG_BITS	= 1,
#endif

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

	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,
		       struct lock_class_key *key, const char *lock_name);

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

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

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