Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 11 | #include <linux/lockdep.h> |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 12 | #include <asm/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| 14 | struct workqueue_struct; |
| 15 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 16 | struct work_struct; |
| 17 | typedef void (*work_func_t)(struct work_struct *work); |
David Howells | 6bb49e5 | 2006-11-22 14:54:45 +0000 | [diff] [blame] | 18 | |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | struct work_struct { |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 26 | atomic_long_t data; |
David Howells | 365970a | 2006-11-22 14:54:49 +0000 | [diff] [blame] | 27 | #define WORK_STRUCT_PENDING 0 /* T if work item pending execution */ |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 28 | #define WORK_STRUCT_STATIC 1 /* static initializer (debugobjects) */ |
David Howells | 365970a | 2006-11-22 14:54:49 +0000 | [diff] [blame] | 29 | #define WORK_STRUCT_FLAG_MASK (3UL) |
| 30 | #define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | struct list_head entry; |
David Howells | 6bb49e5 | 2006-11-22 14:54:45 +0000 | [diff] [blame] | 32 | work_func_t func; |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 33 | #ifdef CONFIG_LOCKDEP |
| 34 | struct lockdep_map lockdep_map; |
| 35 | #endif |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 36 | }; |
| 37 | |
Oleg Nesterov | 23b2e59 | 2007-05-09 02:34:19 -0700 | [diff] [blame] | 38 | #define WORK_DATA_INIT() ATOMIC_LONG_INIT(0) |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 39 | #define WORK_DATA_STATIC_INIT() ATOMIC_LONG_INIT(2) |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 40 | |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 41 | struct delayed_work { |
| 42 | struct work_struct work; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | struct timer_list timer; |
| 44 | }; |
| 45 | |
Jean Delvare | bf6aede | 2009-04-02 16:56:54 -0700 | [diff] [blame] | 46 | static inline struct delayed_work *to_delayed_work(struct work_struct *work) |
| 47 | { |
| 48 | return container_of(work, struct delayed_work, work); |
| 49 | } |
| 50 | |
James Bottomley | 1fa44ec | 2006-02-23 12:43:43 -0600 | [diff] [blame] | 51 | struct execute_work { |
| 52 | struct work_struct work; |
| 53 | }; |
| 54 | |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 55 | #ifdef CONFIG_LOCKDEP |
| 56 | /* |
| 57 | * NB: because we have to copy the lockdep_map, setting _key |
| 58 | * here is required, otherwise it could get initialised to the |
| 59 | * copy of the lockdep_map! |
| 60 | */ |
| 61 | #define __WORK_INIT_LOCKDEP_MAP(n, k) \ |
| 62 | .lockdep_map = STATIC_LOCKDEP_MAP_INIT(n, k), |
| 63 | #else |
| 64 | #define __WORK_INIT_LOCKDEP_MAP(n, k) |
| 65 | #endif |
| 66 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 67 | #define __WORK_INITIALIZER(n, f) { \ |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 68 | .data = WORK_DATA_STATIC_INIT(), \ |
Oleg Nesterov | 23b2e59 | 2007-05-09 02:34:19 -0700 | [diff] [blame] | 69 | .entry = { &(n).entry, &(n).entry }, \ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 70 | .func = (f), \ |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 71 | __WORK_INIT_LOCKDEP_MAP(#n, &(n)) \ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | #define __DELAYED_WORK_INITIALIZER(n, f) { \ |
| 75 | .work = __WORK_INITIALIZER((n).work, (f)), \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | .timer = TIMER_INITIALIZER(NULL, 0, 0), \ |
| 77 | } |
| 78 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 79 | #define DECLARE_WORK(n, f) \ |
| 80 | struct work_struct n = __WORK_INITIALIZER(n, f) |
| 81 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 82 | #define DECLARE_DELAYED_WORK(n, f) \ |
| 83 | struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f) |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | /* |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 86 | * initialize a work item's function pointer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | */ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 88 | #define PREPARE_WORK(_work, _func) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | do { \ |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 90 | (_work)->func = (_func); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | } while (0) |
| 92 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 93 | #define PREPARE_DELAYED_WORK(_work, _func) \ |
| 94 | PREPARE_WORK(&(_work)->work, (_func)) |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 95 | |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 96 | #ifdef CONFIG_DEBUG_OBJECTS_WORK |
| 97 | extern void __init_work(struct work_struct *work, int onstack); |
| 98 | extern void destroy_work_on_stack(struct work_struct *work); |
Tejun Heo | 4690c4a | 2010-06-29 10:07:10 +0200 | [diff] [blame^] | 99 | static inline unsigned int work_static(struct work_struct *work) |
| 100 | { |
| 101 | return *work_data_bits(work) & (1 << WORK_STRUCT_STATIC); |
| 102 | } |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 103 | #else |
| 104 | static inline void __init_work(struct work_struct *work, int onstack) { } |
| 105 | static inline void destroy_work_on_stack(struct work_struct *work) { } |
Tejun Heo | 4690c4a | 2010-06-29 10:07:10 +0200 | [diff] [blame^] | 106 | static inline unsigned int work_static(struct work_struct *work) { return 0; } |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 107 | #endif |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | /* |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 110 | * initialize all of a work item in one go |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 111 | * |
Dmitri Vorobiev | b9049df | 2009-06-23 12:09:29 +0200 | [diff] [blame] | 112 | * NOTE! No point in using "atomic_long_set()": using a direct |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 113 | * assignment of the work data initializer allows the compiler |
| 114 | * to generate better code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | */ |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 116 | #ifdef CONFIG_LOCKDEP |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 117 | #define __INIT_WORK(_work, _func, _onstack) \ |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 118 | do { \ |
| 119 | static struct lock_class_key __key; \ |
| 120 | \ |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 121 | __init_work((_work), _onstack); \ |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 122 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ |
| 123 | lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0);\ |
| 124 | INIT_LIST_HEAD(&(_work)->entry); \ |
| 125 | PREPARE_WORK((_work), (_func)); \ |
| 126 | } while (0) |
| 127 | #else |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 128 | #define __INIT_WORK(_work, _func, _onstack) \ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 129 | do { \ |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 130 | __init_work((_work), _onstack); \ |
Oleg Nesterov | 23b2e59 | 2007-05-09 02:34:19 -0700 | [diff] [blame] | 131 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 132 | INIT_LIST_HEAD(&(_work)->entry); \ |
| 133 | PREPARE_WORK((_work), (_func)); \ |
| 134 | } while (0) |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 135 | #endif |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 136 | |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 137 | #define INIT_WORK(_work, _func) \ |
| 138 | do { \ |
| 139 | __INIT_WORK((_work), (_func), 0); \ |
| 140 | } while (0) |
| 141 | |
| 142 | #define INIT_WORK_ON_STACK(_work, _func) \ |
| 143 | do { \ |
| 144 | __INIT_WORK((_work), (_func), 1); \ |
| 145 | } while (0) |
| 146 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 147 | #define INIT_DELAYED_WORK(_work, _func) \ |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 148 | do { \ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 149 | INIT_WORK(&(_work)->work, (_func)); \ |
| 150 | init_timer(&(_work)->timer); \ |
| 151 | } while (0) |
| 152 | |
Peter Zijlstra | 6d612b0 | 2009-01-12 12:52:23 +0100 | [diff] [blame] | 153 | #define INIT_DELAYED_WORK_ON_STACK(_work, _func) \ |
| 154 | do { \ |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 155 | INIT_WORK_ON_STACK(&(_work)->work, (_func)); \ |
Peter Zijlstra | 6d612b0 | 2009-01-12 12:52:23 +0100 | [diff] [blame] | 156 | init_timer_on_stack(&(_work)->timer); \ |
| 157 | } while (0) |
| 158 | |
Thomas Gleixner | dc186ad | 2009-11-16 01:09:48 +0900 | [diff] [blame] | 159 | #define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \ |
Venki Pallipadi | 2828703 | 2007-05-08 00:27:47 -0700 | [diff] [blame] | 160 | do { \ |
| 161 | INIT_WORK(&(_work)->work, (_func)); \ |
| 162 | init_timer_deferrable(&(_work)->timer); \ |
| 163 | } while (0) |
| 164 | |
David Howells | 365970a | 2006-11-22 14:54:49 +0000 | [diff] [blame] | 165 | /** |
| 166 | * work_pending - Find out whether a work item is currently pending |
| 167 | * @work: The work item in question |
| 168 | */ |
| 169 | #define work_pending(work) \ |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 170 | test_bit(WORK_STRUCT_PENDING, work_data_bits(work)) |
David Howells | 365970a | 2006-11-22 14:54:49 +0000 | [diff] [blame] | 171 | |
| 172 | /** |
| 173 | * delayed_work_pending - Find out whether a delayable work item is currently |
| 174 | * pending |
| 175 | * @work: The work item in question |
| 176 | */ |
Linus Torvalds | 0221872 | 2006-12-15 14:13:51 -0800 | [diff] [blame] | 177 | #define delayed_work_pending(w) \ |
| 178 | work_pending(&(w)->work) |
David Howells | 365970a | 2006-11-22 14:54:49 +0000 | [diff] [blame] | 179 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 180 | /** |
Oleg Nesterov | 23b2e59 | 2007-05-09 02:34:19 -0700 | [diff] [blame] | 181 | * work_clear_pending - for internal use only, mark a work item as not pending |
| 182 | * @work: The work item in question |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 183 | */ |
Oleg Nesterov | 23b2e59 | 2007-05-09 02:34:19 -0700 | [diff] [blame] | 184 | #define work_clear_pending(work) \ |
Linus Torvalds | a08727b | 2006-12-16 09:53:50 -0800 | [diff] [blame] | 185 | clear_bit(WORK_STRUCT_PENDING, work_data_bits(work)) |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 186 | |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 187 | |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 188 | extern struct workqueue_struct * |
Tejun Heo | c790bce | 2010-06-29 10:07:09 +0200 | [diff] [blame] | 189 | __create_workqueue_key(const char *name, int singlethread, int freezeable, |
| 190 | struct lock_class_key *key, const char *lock_name); |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 191 | |
| 192 | #ifdef CONFIG_LOCKDEP |
Tejun Heo | c790bce | 2010-06-29 10:07:09 +0200 | [diff] [blame] | 193 | #define __create_workqueue(name, singlethread, freezeable) \ |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 194 | ({ \ |
| 195 | static struct lock_class_key __key; \ |
Johannes Berg | eb13ba8 | 2008-01-16 09:51:58 +0100 | [diff] [blame] | 196 | const char *__lock_name; \ |
| 197 | \ |
| 198 | if (__builtin_constant_p(name)) \ |
| 199 | __lock_name = (name); \ |
| 200 | else \ |
| 201 | __lock_name = #name; \ |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 202 | \ |
| 203 | __create_workqueue_key((name), (singlethread), \ |
Tejun Heo | c790bce | 2010-06-29 10:07:09 +0200 | [diff] [blame] | 204 | (freezeable), &__key, \ |
Johannes Berg | eb13ba8 | 2008-01-16 09:51:58 +0100 | [diff] [blame] | 205 | __lock_name); \ |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 206 | }) |
| 207 | #else |
Tejun Heo | c790bce | 2010-06-29 10:07:09 +0200 | [diff] [blame] | 208 | #define __create_workqueue(name, singlethread, freezeable) \ |
| 209 | __create_workqueue_key((name), (singlethread), (freezeable), \ |
Heiko Carstens | 0d557dc | 2008-10-13 23:50:09 +0200 | [diff] [blame] | 210 | NULL, NULL) |
Johannes Berg | 4e6045f | 2007-10-18 23:39:55 -0700 | [diff] [blame] | 211 | #endif |
| 212 | |
Tejun Heo | c790bce | 2010-06-29 10:07:09 +0200 | [diff] [blame] | 213 | #define create_workqueue(name) __create_workqueue((name), 0, 0) |
| 214 | #define create_freezeable_workqueue(name) __create_workqueue((name), 1, 1) |
| 215 | #define create_singlethread_workqueue(name) __create_workqueue((name), 1, 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
| 217 | extern void destroy_workqueue(struct workqueue_struct *wq); |
| 218 | |
Harvey Harrison | b3c9752 | 2008-02-13 15:03:15 -0800 | [diff] [blame] | 219 | extern int queue_work(struct workqueue_struct *wq, struct work_struct *work); |
Zhang Rui | c1a220e | 2008-07-23 21:28:39 -0700 | [diff] [blame] | 220 | extern int queue_work_on(int cpu, struct workqueue_struct *wq, |
| 221 | struct work_struct *work); |
Harvey Harrison | b3c9752 | 2008-02-13 15:03:15 -0800 | [diff] [blame] | 222 | extern int queue_delayed_work(struct workqueue_struct *wq, |
| 223 | struct delayed_work *work, unsigned long delay); |
Venkatesh Pallipadi | 7a6bc1c | 2006-06-28 13:50:33 -0700 | [diff] [blame] | 224 | extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq, |
Oleg Nesterov | 28e53bd | 2007-05-09 02:34:22 -0700 | [diff] [blame] | 225 | struct delayed_work *work, unsigned long delay); |
| 226 | |
Harvey Harrison | b3c9752 | 2008-02-13 15:03:15 -0800 | [diff] [blame] | 227 | extern void flush_workqueue(struct workqueue_struct *wq); |
Oleg Nesterov | 28e53bd | 2007-05-09 02:34:22 -0700 | [diff] [blame] | 228 | extern void flush_scheduled_work(void); |
Linus Torvalds | 43046b6 | 2009-10-14 09:16:42 -0700 | [diff] [blame] | 229 | extern void flush_delayed_work(struct delayed_work *work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Harvey Harrison | b3c9752 | 2008-02-13 15:03:15 -0800 | [diff] [blame] | 231 | extern int schedule_work(struct work_struct *work); |
Zhang Rui | c1a220e | 2008-07-23 21:28:39 -0700 | [diff] [blame] | 232 | extern int schedule_work_on(int cpu, struct work_struct *work); |
Harvey Harrison | b3c9752 | 2008-02-13 15:03:15 -0800 | [diff] [blame] | 233 | extern int schedule_delayed_work(struct delayed_work *work, unsigned long delay); |
Oleg Nesterov | 28e53bd | 2007-05-09 02:34:22 -0700 | [diff] [blame] | 234 | extern int schedule_delayed_work_on(int cpu, struct delayed_work *work, |
| 235 | unsigned long delay); |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 236 | extern int schedule_on_each_cpu(work_func_t func); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | extern int current_is_keventd(void); |
| 238 | extern int keventd_up(void); |
| 239 | |
| 240 | extern void init_workqueues(void); |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 241 | int execute_in_process_context(work_func_t fn, struct execute_work *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Oleg Nesterov | db70089 | 2008-07-25 01:47:49 -0700 | [diff] [blame] | 243 | extern int flush_work(struct work_struct *work); |
| 244 | |
Oleg Nesterov | 1f1f642 | 2007-07-15 23:41:44 -0700 | [diff] [blame] | 245 | extern int cancel_work_sync(struct work_struct *work); |
Oleg Nesterov | 28e53bd | 2007-05-09 02:34:22 -0700 | [diff] [blame] | 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | /* |
| 248 | * Kill off a pending schedule_delayed_work(). Note that the work callback |
Oleg Nesterov | 071b638 | 2007-04-26 15:45:32 -0700 | [diff] [blame] | 249 | * function may still be running on return from cancel_delayed_work(), unless |
| 250 | * it returns 1 and the work doesn't re-arm itself. Run flush_workqueue() or |
Oleg Nesterov | 28e53bd | 2007-05-09 02:34:22 -0700 | [diff] [blame] | 251 | * cancel_work_sync() to wait on it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | */ |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 253 | static inline int cancel_delayed_work(struct delayed_work *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
| 255 | int ret; |
| 256 | |
Oleg Nesterov | 223a10a | 2007-05-18 00:36:42 -0700 | [diff] [blame] | 257 | ret = del_timer_sync(&work->timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | if (ret) |
Oleg Nesterov | 23b2e59 | 2007-05-09 02:34:19 -0700 | [diff] [blame] | 259 | work_clear_pending(&work->work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | return ret; |
| 261 | } |
| 262 | |
Oleg Nesterov | 4e49627 | 2009-09-05 11:17:06 -0700 | [diff] [blame] | 263 | /* |
| 264 | * Like above, but uses del_timer() instead of del_timer_sync(). This means, |
| 265 | * if it returns 0 the timer function may be running and the queueing is in |
| 266 | * progress. |
| 267 | */ |
| 268 | static inline int __cancel_delayed_work(struct delayed_work *work) |
| 269 | { |
| 270 | int ret; |
| 271 | |
| 272 | ret = del_timer(&work->timer); |
| 273 | if (ret) |
| 274 | work_clear_pending(&work->work); |
| 275 | return ret; |
| 276 | } |
| 277 | |
Oleg Nesterov | 1f1f642 | 2007-07-15 23:41:44 -0700 | [diff] [blame] | 278 | extern int cancel_delayed_work_sync(struct delayed_work *work); |
Oleg Nesterov | 1634c48 | 2007-05-09 02:34:18 -0700 | [diff] [blame] | 279 | |
Oleg Nesterov | f5a421a | 2007-07-15 23:41:44 -0700 | [diff] [blame] | 280 | /* Obsolete. use cancel_delayed_work_sync() */ |
Oleg Nesterov | 1634c48 | 2007-05-09 02:34:18 -0700 | [diff] [blame] | 281 | static inline |
| 282 | void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq, |
| 283 | struct delayed_work *work) |
| 284 | { |
Oleg Nesterov | f5a421a | 2007-07-15 23:41:44 -0700 | [diff] [blame] | 285 | cancel_delayed_work_sync(work); |
| 286 | } |
| 287 | |
| 288 | /* Obsolete. use cancel_delayed_work_sync() */ |
| 289 | static inline |
| 290 | void cancel_rearming_delayed_work(struct delayed_work *work) |
| 291 | { |
| 292 | cancel_delayed_work_sync(work); |
Oleg Nesterov | 1634c48 | 2007-05-09 02:34:18 -0700 | [diff] [blame] | 293 | } |
| 294 | |
Rusty Russell | 2d3854a | 2008-11-05 13:39:10 +1100 | [diff] [blame] | 295 | #ifndef CONFIG_SMP |
| 296 | static inline long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg) |
| 297 | { |
| 298 | return fn(arg); |
| 299 | } |
| 300 | #else |
| 301 | long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg); |
| 302 | #endif /* CONFIG_SMP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | #endif |