diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/hrtimer.h | 105 | ||||
| -rw-r--r-- | include/linux/init_task.h | 1 | ||||
| -rw-r--r-- | include/linux/poll.h | 8 | ||||
| -rw-r--r-- | include/linux/prctl.h | 7 | ||||
| -rw-r--r-- | include/linux/sched.h | 6 | ||||
| -rw-r--r-- | include/linux/thread_info.h | 8 | ||||
| -rw-r--r-- | include/linux/time.h | 4 |
7 files changed, 132 insertions, 7 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 9a4e35c..2b3645b 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -20,6 +20,8 @@ #include <linux/init.h> #include <linux/list.h> #include <linux/wait.h> +#include <linux/percpu.h> + struct hrtimer_clock_base; struct hrtimer_cpu_base; @@ -101,9 +103,14 @@ enum hrtimer_cb_mode { /** * struct hrtimer - the basic hrtimer structure * @node: red black tree node for time ordered insertion - * @expires: the absolute expiry time in the hrtimers internal + * @_expires: the absolute expiry time in the hrtimers internal * representation. The time is related to the clock on - * which the timer is based. + * which the timer is based. Is setup by adding + * slack to the _softexpires value. For non range timers + * identical to _softexpires. + * @_softexpires: the absolute earliest expiry time of the hrtimer. + * The time which was given as expiry time when the timer + * was armed. * @function: timer expiry callback function * @base: pointer to the timer base (per cpu and per clock) * @state: state information (See bit values above) @@ -121,7 +128,8 @@ enum hrtimer_cb_mode { */ struct hrtimer { struct rb_node node; - ktime_t expires; + ktime_t _expires; + ktime_t _softexpires; enum hrtimer_restart (*function)(struct hrtimer *); struct hrtimer_clock_base *base; unsigned long state; @@ -201,6 +209,71 @@ struct hrtimer_cpu_base { #endif }; +static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time) +{ + timer->_expires = time; + timer->_softexpires = time; +} + +static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta) +{ + timer->_softexpires = time; + timer->_expires = ktime_add_safe(time, delta); +} + +static inline void hrtimer_set_expires_range_ns(struct hrtimer *timer, ktime_t time, unsigned long delta) +{ + timer->_softexpires = time; + timer->_expires = ktime_add_safe(time, ns_to_ktime(delta)); +} + +static inline void hrtimer_set_expires_tv64(struct hrtimer *timer, s64 tv64) +{ + timer->_expires.tv64 = tv64; + timer->_softexpires.tv64 = tv64; +} + +static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time) +{ + timer->_expires = ktime_add_safe(timer->_expires, time); + timer->_softexpires = ktime_add_safe(timer->_softexpires, time); +} + +static inline void hrtimer_add_expires_ns(struct hrtimer *timer, unsigned long ns) +{ + timer->_expires = ktime_add_ns(timer->_expires, ns); + timer->_softexpires = ktime_add_ns(timer->_softexpires, ns); +} + +static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer) +{ + return timer->_expires; +} + +static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer) +{ + return timer->_softexpires; +} + +static inline s64 hrtimer_get_expires_tv64(const struct hrtimer *timer) +{ + return timer->_expires.tv64; +} +static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer) +{ + return timer->_softexpires.tv64; +} + +static inline s64 hrtimer_get_expires_ns(const struct hrtimer *timer) +{ + return ktime_to_ns(timer->_expires); +} + +static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer) +{ + return ktime_sub(timer->_expires, timer->base->get_time()); +} + #ifdef CONFIG_HIGH_RES_TIMERS struct clock_event_device; @@ -221,6 +294,8 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer) return timer->base->cpu_base->hres_active; } +extern void hrtimer_peek_ahead_timers(void); + /* * The resolution of the clocks. The resolution value is returned in * the clock_getres() system call to give application programmers an @@ -243,6 +318,7 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer) * is expired in the next softirq when the clock was advanced. */ static inline void clock_was_set(void) { } +static inline void hrtimer_peek_ahead_timers(void) { } static inline void hres_timers_resume(void) { } @@ -264,6 +340,10 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer) extern ktime_t ktime_get(void); extern ktime_t ktime_get_real(void); + +DECLARE_PER_CPU(struct tick_device, tick_cpu_device); + + /* Exported timer functions: */ /* Initialize timers: */ @@ -288,12 +368,25 @@ static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { } /* Basic timer operations: */ extern int hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode); +extern int hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, + unsigned long range_ns, const enum hrtimer_mode mode); extern int hrtimer_cancel(struct hrtimer *timer); extern int hrtimer_try_to_cancel(struct hrtimer *timer); +static inline int hrtimer_start_expires(struct hrtimer *timer, + enum hrtimer_mode mode) +{ + unsigned long delta; + ktime_t soft, hard; + soft = hrtimer_get_softexpires(timer); + hard = hrtimer_get_expires(timer); + delta = ktime_to_ns(ktime_sub(hard, soft)); + return hrtimer_start_range_ns(timer, soft, delta, mode); +} + static inline int hrtimer_restart(struct hrtimer *timer) { - return hrtimer_start(timer, timer->expires, HRTIMER_MODE_ABS); + return hrtimer_start_expires(timer, HRTIMER_MODE_ABS); } /* Query timers: */ @@ -350,6 +443,10 @@ extern long hrtimer_nanosleep_restart(struct restart_block *restart_block); extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *tsk); +extern int schedule_hrtimeout_range(ktime_t *expires, unsigned long delta, + const enum hrtimer_mode mode); +extern int schedule_hrtimeout(ktime_t *expires, const enum hrtimer_mode mode); + /* Soft interrupt function to run the hrtimer queues: */ extern void hrtimer_run_queues(void); extern void hrtimer_run_pending(void); diff --git a/include/linux/init_task.h b/include/linux/init_task.h index 021d8e7..23fd890 100644 --- a/include/linux/init_task.h +++ b/include/linux/init_task.h @@ -170,6 +170,7 @@ extern struct group_info init_groups; .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ .fs_excl = ATOMIC_INIT(0), \ .pi_lock = __SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ + .timer_slack_ns = 50000, /* 50 usec default slack */ \ .pids = { \ [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ diff --git a/include/linux/poll.h b/include/linux/poll.h index ef45382..badd98a 100644 --- a/include/linux/poll.h +++ b/include/linux/poll.h @@ -114,11 +114,13 @@ void zero_fd_set(unsigned long nr, unsigned long *fdset) #define MAX_INT64_SECONDS (((s64)(~((u64)0)>>1)/HZ)-1) -extern int do_select(int n, fd_set_bits *fds, s64 *timeout); +extern int do_select(int n, fd_set_bits *fds, struct timespec *end_time); extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds, - s64 *timeout); + struct timespec *end_time); extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp, - fd_set __user *exp, s64 *timeout); + fd_set __user *exp, struct timespec *end_time); + +extern int poll_select_set_timeout(struct timespec *to, long sec, long nsec); #endif /* KERNEL */ diff --git a/include/linux/prctl.h b/include/linux/prctl.h index 5ad7919..48d887e 100644 --- a/include/linux/prctl.h +++ b/include/linux/prctl.h @@ -78,4 +78,11 @@ #define PR_GET_SECUREBITS 27 #define PR_SET_SECUREBITS 28 +/* + * Get/set the timerslack as used by poll/select/nanosleep + * A value of 0 means "use default" + */ +#define PR_SET_TIMERSLACK 29 +#define PR_GET_TIMERSLACK 30 + #endif /* _LINUX_PRCTL_H */ diff --git a/include/linux/sched.h b/include/linux/sched.h index 5c38db5..9ee3bed 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1346,6 +1346,12 @@ struct task_struct { int latency_record_count; struct latency_record latency_record[LT_SAVECOUNT]; #endif + /* + * time slack values; these are used to round up poll() and + * select() etc timeout values. These are in nanoseconds. + */ + unsigned long timer_slack_ns; + unsigned long default_timer_slack_ns; }; /* diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index 38a5647..e6b820f 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -38,6 +38,14 @@ struct restart_block { #endif u64 expires; } nanosleep; + /* For poll */ + struct { + struct pollfd __user *ufds; + int nfds; + int has_timeout; + unsigned long tv_sec; + unsigned long tv_nsec; + } poll; }; }; diff --git a/include/linux/time.h b/include/linux/time.h index 4f1c9db..ce321ac 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -40,6 +40,8 @@ extern struct timezone sys_tz; #define NSEC_PER_SEC 1000000000L #define FSEC_PER_SEC 1000000000000000L +#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1) + static inline int timespec_equal(const struct timespec *a, const struct timespec *b) { @@ -74,6 +76,8 @@ extern unsigned long mktime(const unsigned int year, const unsigned int mon, const unsigned int min, const unsigned int sec); extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec); +extern struct timespec timespec_add_safe(const struct timespec lhs, + const struct timespec rhs); /* * sub = lhs - rhs, in normalized form |
