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posix-timers: Move interval out of the union

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Preparatory patch to unify the alarm timer and hrtimer based posix interval
timer handling.

The interval is used as a criteria for rearming decisions so moving it out
of the clock specific data structures allows later unification.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20170530211656.563922908@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-05-30 23:15:43 +02:00
parent af888d677a
commit 80105cd0e6
3 changed files with 18 additions and 19 deletions
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4
include/linux/posix-timers.h
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@ -63,6 +63,7 @@ struct cpu_timer_list {
* @it_requeue_pending: Indicator that timer waits for being requeued on
* signal delivery
* @it_sigev_notify: The notify word of sigevent struct for signal delivery
* @it_interval: The interval for periodic timers
* @it_signal: Pointer to the creators signal struct
* @it_pid: The pid of the process/task targeted by the signal
* @it_process: The task to wakeup on clock_nanosleep (CPU timers)
@ -80,6 +81,7 @@ struct k_itimer {
int it_overrun_last;
int it_requeue_pending;
int it_sigev_notify;
ktime_t it_interval;
struct signal_struct *it_signal;
union {
struct pid *it_pid;
@ -89,12 +91,10 @@ struct k_itimer {
union {
struct {
struct hrtimer timer;
ktime_t interval;
} real;
struct cpu_timer_list cpu;
struct {
struct alarm alarmtimer;
ktime_t interval;
} alarm;
struct rcu_head rcu;
} it;