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| author | Anna-Maria Behnsen <anna-maria@linutronix.de> | 2024-02-21 10:05:37 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-22 17:52:31 +0100 |
| commit | 9f6a3c602c235c3cccbe673fb7e1cca30ca4be0d (patch) | |
| tree | 622ea80787ec5e450047f50da0ab86fd7a4a3fff /kernel/time | |
| parent | af68cb3fc736e13e66fc8202ea94c3aff7299f39 (diff) | |
| download | linux-9f6a3c602c235c3cccbe673fb7e1cca30ca4be0d.tar.gz linux-9f6a3c602c235c3cccbe673fb7e1cca30ca4be0d.tar.bz2 linux-9f6a3c602c235c3cccbe673fb7e1cca30ca4be0d.zip | |
timers: Split next timer interrupt logic
Split the logic for getting next timer interrupt (no matter of recalculated
or already stored in base->next_expiry) into a separate function named
next_timer_interrupt(). Make it available to local call sites only.
No functional change.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20240221090548.36600-10-anna-maria@linutronix.de
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/timer.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 9c8443d4fe33..748f4b72fb6d 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1996,12 +1996,29 @@ static u64 cmp_next_hrtimer_event(u64 basem, u64 expires) return DIV_ROUND_UP_ULL(nextevt, TICK_NSEC) * TICK_NSEC; } +static unsigned long next_timer_interrupt(struct timer_base *base, + unsigned long basej) +{ + if (base->next_expiry_recalc) + next_expiry_recalc(base); + + /* + * Move next_expiry for the empty base into the future to prevent an + * unnecessary raise of the timer softirq when the next_expiry value + * will be reached even if there is no timer pending. + */ + if (!base->timers_pending) + base->next_expiry = basej + NEXT_TIMER_MAX_DELTA; + + return base->next_expiry; +} + static inline u64 __get_next_timer_interrupt(unsigned long basej, u64 basem, bool *idle) { struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]); - unsigned long nextevt = basej + NEXT_TIMER_MAX_DELTA; u64 expires = KTIME_MAX; + unsigned long nextevt; /* * Pretend that there is no timer pending if the cpu is offline. @@ -2014,24 +2031,13 @@ static inline u64 __get_next_timer_interrupt(unsigned long basej, u64 basem, } raw_spin_lock(&base->lock); - if (base->next_expiry_recalc) - next_expiry_recalc(base); + nextevt = next_timer_interrupt(base, basej); if (base->timers_pending) { - nextevt = base->next_expiry; - /* If we missed a tick already, force 0 delta */ if (time_before(nextevt, basej)) nextevt = basej; expires = basem + (u64)(nextevt - basej) * TICK_NSEC; - } else { - /* - * Move next_expiry for the empty base into the future to - * prevent a unnecessary raise of the timer softirq when the - * next_expiry value will be reached even if there is no timer - * pending. - */ - base->next_expiry = nextevt; } /* |