4 #include <linux/list.h>
5 #include <linux/ktime.h>
6 #include <linux/stddef.h>
7 #include <linux/debugobjects.h>
8 #include <linux/stringify.h>
14 * All fields that change during normal runtime grouped to the
17 struct list_head entry;
18 unsigned long expires;
19 struct tvec_base *base;
21 void (*function)(unsigned long);
26 #ifdef CONFIG_TIMER_STATS
32 struct lockdep_map lockdep_map;
36 extern struct tvec_base boot_tvec_bases;
40 * NB: because we have to copy the lockdep_map, setting the lockdep_map key
41 * (second argument) here is required, otherwise it could be initialised to
42 * the copy of the lockdep_map later! We use the pointer to and the string
43 * "<file>:<line>" as the key resp. the name of the lockdep_map.
45 #define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn) \
46 .lockdep_map = STATIC_LOCKDEP_MAP_INIT(_kn, &_kn),
48 #define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)
51 #define TIMER_INITIALIZER(_function, _expires, _data) { \
52 .entry = { .prev = TIMER_ENTRY_STATIC }, \
53 .function = (_function), \
54 .expires = (_expires), \
56 .base = &boot_tvec_bases, \
57 __TIMER_LOCKDEP_MAP_INITIALIZER( \
58 __FILE__ ":" __stringify(__LINE__)) \
61 #define DEFINE_TIMER(_name, _function, _expires, _data) \
62 struct timer_list _name = \
63 TIMER_INITIALIZER(_function, _expires, _data)
65 void init_timer_key(struct timer_list *timer,
67 struct lock_class_key *key);
68 void init_timer_deferrable_key(struct timer_list *timer,
70 struct lock_class_key *key);
73 #define init_timer(timer) \
75 static struct lock_class_key __key; \
76 init_timer_key((timer), #timer, &__key); \
79 #define init_timer_deferrable(timer) \
81 static struct lock_class_key __key; \
82 init_timer_deferrable_key((timer), #timer, &__key); \
85 #define init_timer_on_stack(timer) \
87 static struct lock_class_key __key; \
88 init_timer_on_stack_key((timer), #timer, &__key); \
91 #define setup_timer(timer, fn, data) \
93 static struct lock_class_key __key; \
94 setup_timer_key((timer), #timer, &__key, (fn), (data));\
97 #define setup_timer_on_stack(timer, fn, data) \
99 static struct lock_class_key __key; \
100 setup_timer_on_stack_key((timer), #timer, &__key, \
103 #define setup_deferrable_timer_on_stack(timer, fn, data) \
105 static struct lock_class_key __key; \
106 setup_deferrable_timer_on_stack_key((timer), #timer, \
111 #define init_timer(timer)\
112 init_timer_key((timer), NULL, NULL)
113 #define init_timer_deferrable(timer)\
114 init_timer_deferrable_key((timer), NULL, NULL)
115 #define init_timer_on_stack(timer)\
116 init_timer_on_stack_key((timer), NULL, NULL)
117 #define setup_timer(timer, fn, data)\
118 setup_timer_key((timer), NULL, NULL, (fn), (data))
119 #define setup_timer_on_stack(timer, fn, data)\
120 setup_timer_on_stack_key((timer), NULL, NULL, (fn), (data))
121 #define setup_deferrable_timer_on_stack(timer, fn, data)\
122 setup_deferrable_timer_on_stack_key((timer), NULL, NULL, (fn), (data))
125 #ifdef CONFIG_DEBUG_OBJECTS_TIMERS
126 extern void init_timer_on_stack_key(struct timer_list *timer,
128 struct lock_class_key *key);
129 extern void destroy_timer_on_stack(struct timer_list *timer);
131 static inline void destroy_timer_on_stack(struct timer_list *timer) { }
132 static inline void init_timer_on_stack_key(struct timer_list *timer,
134 struct lock_class_key *key)
136 init_timer_key(timer, name, key);
140 static inline void setup_timer_key(struct timer_list * timer,
142 struct lock_class_key *key,
143 void (*function)(unsigned long),
146 timer->function = function;
148 init_timer_key(timer, name, key);
151 static inline void setup_timer_on_stack_key(struct timer_list *timer,
153 struct lock_class_key *key,
154 void (*function)(unsigned long),
157 timer->function = function;
159 init_timer_on_stack_key(timer, name, key);
162 extern void setup_deferrable_timer_on_stack_key(struct timer_list *timer,
164 struct lock_class_key *key,
165 void (*function)(unsigned long),
169 * timer_pending - is a timer pending?
170 * @timer: the timer in question
172 * timer_pending will tell whether a given timer is currently pending,
173 * or not. Callers must ensure serialization wrt. other operations done
174 * to this timer, eg. interrupt contexts, or other CPUs on SMP.
176 * return value: 1 if the timer is pending, 0 if not.
178 static inline int timer_pending(const struct timer_list * timer)
180 return timer->entry.next != NULL;
183 extern void add_timer_on(struct timer_list *timer, int cpu);
184 extern int del_timer(struct timer_list * timer);
185 extern int mod_timer(struct timer_list *timer, unsigned long expires);
186 extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
187 extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
189 extern void set_timer_slack(struct timer_list *time, int slack_hz);
191 #define TIMER_NOT_PINNED 0
192 #define TIMER_PINNED 1
194 * The jiffies value which is added to now, when there is no timer
195 * in the timer wheel:
197 #define NEXT_TIMER_MAX_DELTA ((1UL << 30) - 1)
200 * Return when the next timer-wheel timeout occurs (in absolute jiffies),
201 * locks the timer base and does the comparison against the given
204 extern unsigned long get_next_timer_interrupt(unsigned long now);
207 * Timer-statistics info:
209 #ifdef CONFIG_TIMER_STATS
211 extern int timer_stats_active;
213 #define TIMER_STATS_FLAG_DEFERRABLE 0x1
215 extern void init_timer_stats(void);
217 extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
218 void *timerf, char *comm,
219 unsigned int timer_flag);
221 extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
224 static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
226 if (likely(!timer_stats_active))
228 __timer_stats_timer_set_start_info(timer, __builtin_return_address(0));
231 static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
233 timer->start_site = NULL;
236 static inline void init_timer_stats(void)
240 static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
244 static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
249 extern void add_timer(struct timer_list *timer);
252 extern int try_to_del_timer_sync(struct timer_list *timer);
253 extern int del_timer_sync(struct timer_list *timer);
255 # define try_to_del_timer_sync(t) del_timer(t)
256 # define del_timer_sync(t) del_timer(t)
259 #define del_singleshot_timer_sync(t) del_timer_sync(t)
261 extern void init_timers(void);
262 extern void run_local_timers(void);
264 extern enum hrtimer_restart it_real_fn(struct hrtimer *);
266 unsigned long __round_jiffies(unsigned long j, int cpu);
267 unsigned long __round_jiffies_relative(unsigned long j, int cpu);
268 unsigned long round_jiffies(unsigned long j);
269 unsigned long round_jiffies_relative(unsigned long j);
271 unsigned long __round_jiffies_up(unsigned long j, int cpu);
272 unsigned long __round_jiffies_up_relative(unsigned long j, int cpu);
273 unsigned long round_jiffies_up(unsigned long j);
274 unsigned long round_jiffies_up_relative(unsigned long j);