diff options
Diffstat (limited to 'include/linux/timer.h')
| -rw-r--r-- | include/linux/timer.h | 107 |
1 files changed, 36 insertions, 71 deletions
diff --git a/include/linux/timer.h b/include/linux/timer.h index d10bc7e73b41..0414d9e6b4fc 100644 --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -7,21 +7,7 @@ #include <linux/stddef.h> #include <linux/debugobjects.h> #include <linux/stringify.h> - -struct timer_list { - /* - * All fields that change during normal runtime grouped to the - * same cacheline - */ - struct hlist_node entry; - unsigned long expires; - void (*function)(struct timer_list *); - u32 flags; - -#ifdef CONFIG_LOCKDEP - struct lockdep_map lockdep_map; -#endif -}; +#include <linux/timer_types.h> #ifdef CONFIG_LOCKDEP /* @@ -36,7 +22,7 @@ struct timer_list { #define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn) #endif -/** +/* * @TIMER_DEFERRABLE: A deferrable timer will work normally when the * system is busy, but will not cause a CPU to come out of idle just * to service it; instead, the timer will be serviced when the CPU @@ -44,22 +30,16 @@ struct timer_list { * * @TIMER_IRQSAFE: An irqsafe timer is executed with IRQ disabled and * it's safe to wait for the completion of the running instance from - * IRQ handlers, for example, by calling del_timer_sync(). + * IRQ handlers, for example, by calling timer_delete_sync(). * * Note: The irq disabled callback execution is a special case for * workqueue locking issues. It's not meant for executing random crap * with interrupts disabled. Abuse is monitored! * - * @TIMER_PINNED: A pinned timer will not be affected by any timer - * placement heuristics (like, NOHZ) and will always expire on the CPU - * on which the timer was enqueued. - * - * Note: Because enqueuing of timers can migrate the timer from one - * CPU to another, pinned timers are not guaranteed to stay on the - * initialy selected CPU. They move to the CPU on which the enqueue - * function is invoked via mod_timer() or add_timer(). If the timer - * should be placed on a particular CPU, then add_timer_on() has to be - * used. + * @TIMER_PINNED: A pinned timer will always expire on the CPU on which the + * timer was enqueued. When a particular CPU is required, add_timer_on() + * has to be used. Enqueue via mod_timer() and add_timer() is always done + * on the local CPU. */ #define TIMER_CPUMASK 0x0003FFFF #define TIMER_MIGRATING 0x00040000 @@ -77,8 +57,7 @@ struct timer_list { .entry = { .next = TIMER_ENTRY_STATIC }, \ .function = (_function), \ .flags = (_flags), \ - __TIMER_LOCKDEP_MAP_INITIALIZER( \ - __FILE__ ":" __stringify(__LINE__)) \ + __TIMER_LOCKDEP_MAP_INITIALIZER(FILE_LINE) \ } #define DEFINE_TIMER(_name, _function) \ @@ -88,44 +67,44 @@ struct timer_list { /* * LOCKDEP and DEBUG timer interfaces. */ -void init_timer_key(struct timer_list *timer, +void timer_init_key(struct timer_list *timer, void (*func)(struct timer_list *), unsigned int flags, const char *name, struct lock_class_key *key); #ifdef CONFIG_DEBUG_OBJECTS_TIMERS -extern void init_timer_on_stack_key(struct timer_list *timer, +extern void timer_init_key_on_stack(struct timer_list *timer, void (*func)(struct timer_list *), unsigned int flags, const char *name, struct lock_class_key *key); #else -static inline void init_timer_on_stack_key(struct timer_list *timer, +static inline void timer_init_key_on_stack(struct timer_list *timer, void (*func)(struct timer_list *), unsigned int flags, const char *name, struct lock_class_key *key) { - init_timer_key(timer, func, flags, name, key); + timer_init_key(timer, func, flags, name, key); } #endif #ifdef CONFIG_LOCKDEP -#define __init_timer(_timer, _fn, _flags) \ +#define __timer_init(_timer, _fn, _flags) \ do { \ static struct lock_class_key __key; \ - init_timer_key((_timer), (_fn), (_flags), #_timer, &__key);\ + timer_init_key((_timer), (_fn), (_flags), #_timer, &__key);\ } while (0) -#define __init_timer_on_stack(_timer, _fn, _flags) \ +#define __timer_init_on_stack(_timer, _fn, _flags) \ do { \ static struct lock_class_key __key; \ - init_timer_on_stack_key((_timer), (_fn), (_flags), \ + timer_init_key_on_stack((_timer), (_fn), (_flags), \ #_timer, &__key); \ } while (0) #else -#define __init_timer(_timer, _fn, _flags) \ - init_timer_key((_timer), (_fn), (_flags), NULL, NULL) -#define __init_timer_on_stack(_timer, _fn, _flags) \ - init_timer_on_stack_key((_timer), (_fn), (_flags), NULL, NULL) +#define __timer_init(_timer, _fn, _flags) \ + timer_init_key((_timer), (_fn), (_flags), NULL, NULL) +#define __timer_init_on_stack(_timer, _fn, _flags) \ + timer_init_key_on_stack((_timer), (_fn), (_flags), NULL, NULL) #endif /** @@ -136,21 +115,21 @@ static inline void init_timer_on_stack_key(struct timer_list *timer, * * Regular timer initialization should use either DEFINE_TIMER() above, * or timer_setup(). For timers on the stack, timer_setup_on_stack() must - * be used and must be balanced with a call to destroy_timer_on_stack(). + * be used and must be balanced with a call to timer_destroy_on_stack(). */ #define timer_setup(timer, callback, flags) \ - __init_timer((timer), (callback), (flags)) + __timer_init((timer), (callback), (flags)) #define timer_setup_on_stack(timer, callback, flags) \ - __init_timer_on_stack((timer), (callback), (flags)) + __timer_init_on_stack((timer), (callback), (flags)) #ifdef CONFIG_DEBUG_OBJECTS_TIMERS -extern void destroy_timer_on_stack(struct timer_list *timer); +extern void timer_destroy_on_stack(struct timer_list *timer); #else -static inline void destroy_timer_on_stack(struct timer_list *timer) { } +static inline void timer_destroy_on_stack(struct timer_list *timer) { } #endif -#define from_timer(var, callback_timer, timer_fieldname) \ +#define timer_container_of(var, callback_timer, timer_fieldname) \ container_of(callback_timer, typeof(*var), timer_fieldname) /** @@ -161,7 +140,7 @@ static inline void destroy_timer_on_stack(struct timer_list *timer) { } * or not. Callers must ensure serialization wrt. other operations done * to this timer, eg. interrupt contexts, or other CPUs on SMP. * - * return value: 1 if the timer is pending, 0 if not. + * Returns: 1 if the timer is pending, 0 if not. */ static inline int timer_pending(const struct timer_list * timer) { @@ -169,7 +148,6 @@ static inline int timer_pending(const struct timer_list * timer) } extern void add_timer_on(struct timer_list *timer, int cpu); -extern int del_timer(struct timer_list * timer); extern int mod_timer(struct timer_list *timer, unsigned long expires); extern int mod_timer_pending(struct timer_list *timer, unsigned long expires); extern int timer_reduce(struct timer_list *timer, unsigned long expires); @@ -178,39 +156,26 @@ extern int timer_reduce(struct timer_list *timer, unsigned long expires); * The jiffies value which is added to now, when there is no timer * in the timer wheel: */ -#define NEXT_TIMER_MAX_DELTA ((1UL << 30) - 1) +#define TIMER_NEXT_MAX_DELTA ((1UL << 30) - 1) extern void add_timer(struct timer_list *timer); +extern void add_timer_local(struct timer_list *timer); +extern void add_timer_global(struct timer_list *timer); -extern int try_to_del_timer_sync(struct timer_list *timer); +extern int timer_delete_sync_try(struct timer_list *timer); +extern int timer_delete_sync(struct timer_list *timer); +extern int timer_delete(struct timer_list *timer); +extern int timer_shutdown_sync(struct timer_list *timer); +extern int timer_shutdown(struct timer_list *timer); -#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT) - extern int del_timer_sync(struct timer_list *timer); -#else -# define del_timer_sync(t) del_timer(t) -#endif - -#define del_singleshot_timer_sync(t) del_timer_sync(t) - -extern void init_timers(void); -extern void run_local_timers(void); +extern void timers_init(void); struct hrtimer; extern enum hrtimer_restart it_real_fn(struct hrtimer *); -#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) -struct ctl_table; - -extern unsigned int sysctl_timer_migration; -int timer_migration_handler(struct ctl_table *table, int write, - void *buffer, size_t *lenp, loff_t *ppos); -#endif - -unsigned long __round_jiffies(unsigned long j, int cpu); unsigned long __round_jiffies_relative(unsigned long j, int cpu); unsigned long round_jiffies(unsigned long j); unsigned long round_jiffies_relative(unsigned long j); -unsigned long __round_jiffies_up(unsigned long j, int cpu); unsigned long __round_jiffies_up_relative(unsigned long j, int cpu); unsigned long round_jiffies_up(unsigned long j); unsigned long round_jiffies_up_relative(unsigned long j); |