diff options
| author | Thomas Gleixner <tglx@kernel.org> | 2026-04-08 13:54:16 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-05-01 21:36:13 +0200 |
| commit | f4b58f61da79032b03d25f8f1a5a697db84a46f3 (patch) | |
| tree | 7779776a1550ca7d9c2e748c737eb07be2c1b4e7 /kernel/time | |
| parent | 183d00b727139cf3b4be78d66a5602ce71a3acec (diff) | |
alarmtimer: Convert posix timer functions to alarm_start_timer()
Use the new alarm_start_timer() for arming and rearming posix interval
timers and for clock_nanosleep() so that already expired timers do not go
through the full timer interrupt cycle.
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: John Stultz <jstultz@google.com>
Link: https://patch.msgid.link/20260408114952.400451460@kernel.org
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/alarmtimer.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 2348b0839114..9baa69cfa158 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -560,8 +560,7 @@ static bool alarm_timer_rearm(struct k_itimer *timr) struct alarm *alarm = &timr->it.alarm.alarmtimer; timr->it_overrun += alarm_forward_now(alarm, timr->it_interval); - alarm_start(alarm, alarm->node.expires); - return true; + return alarm_start_timer(alarm, alarm->node.expires, false); } /** @@ -625,11 +624,16 @@ static bool alarm_timer_arm(struct k_itimer *timr, ktime_t expires, if (!absolute) expires = ktime_add_safe(expires, base->get_ktime()); - if (sigev_none) + + /* + * sigev_none needs to update the expires value and pretend + * that the timer is queued + */ + if (sigev_none) { alarm->node.expires = expires; - else - alarm_start(&timr->it.alarm.alarmtimer, expires); - return true; + return true; + } + return alarm_start_timer(&timr->it.alarm.alarmtimer, expires, false); } /** @@ -736,7 +740,9 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp, alarm->data = (void *)current; do { set_current_state(TASK_INTERRUPTIBLE); - alarm_start(alarm, absexp); + if (!alarm_start_timer(alarm, absexp, false)) + alarm->data = NULL; + if (likely(alarm->data)) schedule(); |