diff options
Diffstat (limited to 'include/linux/posix-timers.h')
| -rw-r--r-- | include/linux/posix-timers.h | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index f11f10c97bd9..dd48c64b605e 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -114,6 +114,7 @@ bool posixtimer_init_sigqueue(struct sigqueue *q); void posixtimer_send_sigqueue(struct k_itimer *tmr); bool posixtimer_deliver_signal(struct kernel_siginfo *info, struct sigqueue *timer_sigq); void posixtimer_free_timer(struct k_itimer *timer); +long posixtimer_create_prctl(unsigned long ctrl); /* Init task static initializer */ #define INIT_CPU_TIMERBASE(b) { \ @@ -140,6 +141,7 @@ static inline void posixtimer_rearm_itimer(struct task_struct *p) { } static inline bool posixtimer_deliver_signal(struct kernel_siginfo *info, struct sigqueue *timer_sigq) { return false; } static inline void posixtimer_free_timer(struct k_itimer *timer) { } +static inline long posixtimer_create_prctl(unsigned long ctrl) { return -EINVAL; } #endif #ifdef CONFIG_POSIX_CPU_TIMERS_TASK_WORK @@ -177,23 +179,26 @@ static inline void posix_cputimers_init_work(void) { } * @rcu: RCU head for freeing the timer. */ struct k_itimer { - struct hlist_node list; - struct hlist_node ignored_list; + /* 1st cacheline contains read-mostly fields */ struct hlist_node t_hash; - spinlock_t it_lock; - const struct k_clock *kclock; - clockid_t it_clock; + struct hlist_node list; timer_t it_id; + clockid_t it_clock; + int it_sigev_notify; + enum pid_type it_pid_type; + struct signal_struct *it_signal; + const struct k_clock *kclock; + + /* 2nd cacheline and above contain fields which are modified regularly */ + spinlock_t it_lock; int it_status; bool it_sig_periodic; s64 it_overrun; s64 it_overrun_last; unsigned int it_signal_seq; unsigned int it_sigqueue_seq; - int it_sigev_notify; - enum pid_type it_pid_type; ktime_t it_interval; - struct signal_struct *it_signal; + struct hlist_node ignored_list; union { struct pid *it_pid; struct task_struct *it_process; @@ -210,7 +215,7 @@ struct k_itimer { } alarm; } it; struct rcu_head rcu; -}; +} ____cacheline_aligned_in_smp; void run_posix_cpu_timers(void); void posix_cpu_timers_exit(struct task_struct *task); @@ -240,6 +245,13 @@ static inline void posixtimer_sigqueue_putref(struct sigqueue *q) posixtimer_putref(tmr); } + +static inline bool posixtimer_valid(const struct k_itimer *timer) +{ + unsigned long val = (unsigned long)timer->it_signal; + + return !(val & 0x1UL); +} #else /* CONFIG_POSIX_TIMERS */ static inline void posixtimer_sigqueue_getref(struct sigqueue *q) { } static inline void posixtimer_sigqueue_putref(struct sigqueue *q) { } |