diff options
-rw-r--r-- | include/linux/workqueue.h | 64 | ||||
-rw-r--r-- | kernel/workqueue.c | 5 |
2 files changed, 11 insertions, 58 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index 27110c04f21e..e1581dce5890 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h | |||
@@ -24,15 +24,13 @@ typedef void (*work_func_t)(struct work_struct *work); | |||
24 | struct work_struct { | 24 | struct work_struct { |
25 | atomic_long_t data; | 25 | atomic_long_t data; |
26 | #define WORK_STRUCT_PENDING 0 /* T if work item pending execution */ | 26 | #define WORK_STRUCT_PENDING 0 /* T if work item pending execution */ |
27 | #define WORK_STRUCT_NOAUTOREL 1 /* F if work item automatically released on exec */ | ||
28 | #define WORK_STRUCT_FLAG_MASK (3UL) | 27 | #define WORK_STRUCT_FLAG_MASK (3UL) |
29 | #define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK) | 28 | #define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK) |
30 | struct list_head entry; | 29 | struct list_head entry; |
31 | work_func_t func; | 30 | work_func_t func; |
32 | }; | 31 | }; |
33 | 32 | ||
34 | #define WORK_DATA_INIT(autorelease) \ | 33 | #define WORK_DATA_INIT() ATOMIC_LONG_INIT(0) |
35 | ATOMIC_LONG_INIT((autorelease) << WORK_STRUCT_NOAUTOREL) | ||
36 | 34 | ||
37 | struct delayed_work { | 35 | struct delayed_work { |
38 | struct work_struct work; | 36 | struct work_struct work; |
@@ -44,14 +42,8 @@ struct execute_work { | |||
44 | }; | 42 | }; |
45 | 43 | ||
46 | #define __WORK_INITIALIZER(n, f) { \ | 44 | #define __WORK_INITIALIZER(n, f) { \ |
47 | .data = WORK_DATA_INIT(0), \ | 45 | .data = WORK_DATA_INIT(), \ |
48 | .entry = { &(n).entry, &(n).entry }, \ | 46 | .entry = { &(n).entry, &(n).entry }, \ |
49 | .func = (f), \ | ||
50 | } | ||
51 | |||
52 | #define __WORK_INITIALIZER_NAR(n, f) { \ | ||
53 | .data = WORK_DATA_INIT(1), \ | ||
54 | .entry = { &(n).entry, &(n).entry }, \ | ||
55 | .func = (f), \ | 47 | .func = (f), \ |
56 | } | 48 | } |
57 | 49 | ||
@@ -60,23 +52,12 @@ struct execute_work { | |||
60 | .timer = TIMER_INITIALIZER(NULL, 0, 0), \ | 52 | .timer = TIMER_INITIALIZER(NULL, 0, 0), \ |
61 | } | 53 | } |
62 | 54 | ||
63 | #define __DELAYED_WORK_INITIALIZER_NAR(n, f) { \ | ||
64 | .work = __WORK_INITIALIZER_NAR((n).work, (f)), \ | ||
65 | .timer = TIMER_INITIALIZER(NULL, 0, 0), \ | ||
66 | } | ||
67 | |||
68 | #define DECLARE_WORK(n, f) \ | 55 | #define DECLARE_WORK(n, f) \ |
69 | struct work_struct n = __WORK_INITIALIZER(n, f) | 56 | struct work_struct n = __WORK_INITIALIZER(n, f) |
70 | 57 | ||
71 | #define DECLARE_WORK_NAR(n, f) \ | ||
72 | struct work_struct n = __WORK_INITIALIZER_NAR(n, f) | ||
73 | |||
74 | #define DECLARE_DELAYED_WORK(n, f) \ | 58 | #define DECLARE_DELAYED_WORK(n, f) \ |
75 | struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f) | 59 | struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f) |
76 | 60 | ||
77 | #define DECLARE_DELAYED_WORK_NAR(n, f) \ | ||
78 | struct dwork_struct n = __DELAYED_WORK_INITIALIZER_NAR(n, f) | ||
79 | |||
80 | /* | 61 | /* |
81 | * initialize a work item's function pointer | 62 | * initialize a work item's function pointer |
82 | */ | 63 | */ |
@@ -95,16 +76,9 @@ struct execute_work { | |||
95 | * assignment of the work data initializer allows the compiler | 76 | * assignment of the work data initializer allows the compiler |
96 | * to generate better code. | 77 | * to generate better code. |
97 | */ | 78 | */ |
98 | #define INIT_WORK(_work, _func) \ | 79 | #define INIT_WORK(_work, _func) \ |
99 | do { \ | ||
100 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(0); \ | ||
101 | INIT_LIST_HEAD(&(_work)->entry); \ | ||
102 | PREPARE_WORK((_work), (_func)); \ | ||
103 | } while (0) | ||
104 | |||
105 | #define INIT_WORK_NAR(_work, _func) \ | ||
106 | do { \ | 80 | do { \ |
107 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(1); \ | 81 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ |
108 | INIT_LIST_HEAD(&(_work)->entry); \ | 82 | INIT_LIST_HEAD(&(_work)->entry); \ |
109 | PREPARE_WORK((_work), (_func)); \ | 83 | PREPARE_WORK((_work), (_func)); \ |
110 | } while (0) | 84 | } while (0) |
@@ -115,12 +89,6 @@ struct execute_work { | |||
115 | init_timer(&(_work)->timer); \ | 89 | init_timer(&(_work)->timer); \ |
116 | } while (0) | 90 | } while (0) |
117 | 91 | ||
118 | #define INIT_DELAYED_WORK_NAR(_work, _func) \ | ||
119 | do { \ | ||
120 | INIT_WORK_NAR(&(_work)->work, (_func)); \ | ||
121 | init_timer(&(_work)->timer); \ | ||
122 | } while (0) | ||
123 | |||
124 | #define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \ | 92 | #define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \ |
125 | do { \ | 93 | do { \ |
126 | INIT_WORK(&(_work)->work, (_func)); \ | 94 | INIT_WORK(&(_work)->work, (_func)); \ |
@@ -143,24 +111,10 @@ struct execute_work { | |||
143 | work_pending(&(w)->work) | 111 | work_pending(&(w)->work) |
144 | 112 | ||
145 | /** | 113 | /** |
146 | * work_release - Release a work item under execution | 114 | * work_clear_pending - for internal use only, mark a work item as not pending |
147 | * @work: The work item to release | 115 | * @work: The work item in question |
148 | * | ||
149 | * This is used to release a work item that has been initialised with automatic | ||
150 | * release mode disabled (WORK_STRUCT_NOAUTOREL is set). This gives the work | ||
151 | * function the opportunity to grab auxiliary data from the container of the | ||
152 | * work_struct before clearing the pending bit as the work_struct may be | ||
153 | * subject to deallocation the moment the pending bit is cleared. | ||
154 | * | ||
155 | * In such a case, this should be called in the work function after it has | ||
156 | * fetched any data it may require from the containter of the work_struct. | ||
157 | * After this function has been called, the work_struct may be scheduled for | ||
158 | * further execution or it may be deallocated unless other precautions are | ||
159 | * taken. | ||
160 | * | ||
161 | * This should also be used to release a delayed work item. | ||
162 | */ | 116 | */ |
163 | #define work_release(work) \ | 117 | #define work_clear_pending(work) \ |
164 | clear_bit(WORK_STRUCT_PENDING, work_data_bits(work)) | 118 | clear_bit(WORK_STRUCT_PENDING, work_data_bits(work)) |
165 | 119 | ||
166 | 120 | ||
@@ -205,7 +159,7 @@ static inline int cancel_delayed_work(struct delayed_work *work) | |||
205 | 159 | ||
206 | ret = del_timer(&work->timer); | 160 | ret = del_timer(&work->timer); |
207 | if (ret) | 161 | if (ret) |
208 | work_release(&work->work); | 162 | work_clear_pending(&work->work); |
209 | return ret; | 163 | return ret; |
210 | } | 164 | } |
211 | 165 | ||
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 41eaffd125ca..0611de815a8f 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c | |||
@@ -246,8 +246,7 @@ static void run_workqueue(struct cpu_workqueue_struct *cwq) | |||
246 | spin_unlock_irq(&cwq->lock); | 246 | spin_unlock_irq(&cwq->lock); |
247 | 247 | ||
248 | BUG_ON(get_wq_data(work) != cwq); | 248 | BUG_ON(get_wq_data(work) != cwq); |
249 | if (!test_bit(WORK_STRUCT_NOAUTOREL, work_data_bits(work))) | 249 | work_clear_pending(work); |
250 | work_release(work); | ||
251 | f(work); | 250 | f(work); |
252 | 251 | ||
253 | if (unlikely(in_atomic() || lockdep_depth(current) > 0)) { | 252 | if (unlikely(in_atomic() || lockdep_depth(current) > 0)) { |
@@ -453,7 +452,7 @@ void flush_work(struct workqueue_struct *wq, struct work_struct *work) | |||
453 | */ | 452 | */ |
454 | spin_lock_irq(&cwq->lock); | 453 | spin_lock_irq(&cwq->lock); |
455 | list_del_init(&work->entry); | 454 | list_del_init(&work->entry); |
456 | work_release(work); | 455 | work_clear_pending(work); |
457 | spin_unlock_irq(&cwq->lock); | 456 | spin_unlock_irq(&cwq->lock); |
458 | 457 | ||
459 | for_each_cpu_mask(cpu, *cpu_map) | 458 | for_each_cpu_mask(cpu, *cpu_map) |