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posix-timers: Consolidate signal queueing

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Rename posix_timer_event() to posix_timer_queue_signal() as this is what
the function is about.

Consolidate the requeue pending and deactivation updates into that function
as there is no point in doing this in all incarnations of posix timers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Thomas Gleixner 2024-06-10 18:42:32 +02:00 committed by Frederic Weisbecker
parent 24aea4cc48
commit 566e2d8253
4 changed files with 15 additions and 19 deletions
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7
kernel/time/alarmtimer.c
View File

@ -574,15 +574,10 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm,
it.alarm.alarmtimer);
enum alarmtimer_restart result = ALARMTIMER_NORESTART;
unsigned long flags;
int si_private = 0;
spin_lock_irqsave(&ptr->it_lock, flags);
ptr->it_active = 0;
if (ptr->it_interval)
si_private = ++ptr->it_requeue_pending;
if (posix_timer_event(ptr, si_private) && ptr->it_interval) {
if (posix_timer_queue_signal(ptr) && ptr->it_interval) {
/*
* Handle ignored signals and rearm the timer. This will go
* away once we handle ignored signals proper. Ensure that

4
kernel/time/posix-cpu-timers.c
View File

@ -598,9 +598,9 @@ static void cpu_timer_fire(struct k_itimer *timer)
/*
* One-shot timer. Clear it as soon as it's fired.
*/
posix_timer_event(timer, 0);
posix_timer_queue_signal(timer);
cpu_timer_setexpires(ctmr, 0);
} else if (posix_timer_event(timer, ++timer->it_requeue_pending)) {
} else if (posix_timer_queue_signal(timer)) {
/*
* The signal did not get queued because the signal
* was ignored, so we won't get any callback to

21
kernel/time/posix-timers.c
View File

@ -277,10 +277,17 @@ void posixtimer_rearm(struct kernel_siginfo *info)
unlock_timer(timr, flags);
}
int posix_timer_event(struct k_itimer *timr, int si_private)
int posix_timer_queue_signal(struct k_itimer *timr)
{
int ret, si_private = 0;
enum pid_type type;
int ret;
lockdep_assert_held(&timr->it_lock);
timr->it_active = 0;
if (timr->it_interval)
si_private = ++timr->it_requeue_pending;
/*
* FIXME: if ->sigq is queued we can race with
* dequeue_signal()->posixtimer_rearm().
@ -309,19 +316,13 @@ int posix_timer_event(struct k_itimer *timr, int si_private)
*/
static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer)
{
struct k_itimer *timr = container_of(timer, struct k_itimer, it.real.timer);
enum hrtimer_restart ret = HRTIMER_NORESTART;
struct k_itimer *timr;
unsigned long flags;
int si_private = 0;
timr = container_of(timer, struct k_itimer, it.real.timer);
spin_lock_irqsave(&timr->it_lock, flags);
timr->it_active = 0;
if (timr->it_interval != 0)
si_private = ++timr->it_requeue_pending;
if (posix_timer_event(timr, si_private)) {
if (posix_timer_queue_signal(timr)) {
/*
* The signal was not queued due to SIG_IGN. As a
* consequence the timer is not going to be rearmed from

2
kernel/time/posix-timers.h
View File

@ -36,7 +36,7 @@ extern const struct k_clock clock_process;
extern const struct k_clock clock_thread;
extern const struct k_clock alarm_clock;
int posix_timer_event(struct k_itimer *timr, int si_private);
int posix_timer_queue_signal(struct k_itimer *timr);
void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
int common_timer_set(struct k_itimer *timr, int flags,