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| author | Thomas Gleixner <tglx@linutronix.de> | 2011-07-17 20:08:38 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-02-13 22:20:46 (GMT) |
| commit | 0623bc2dddc5fef9659d652cede0af467e437473 (patch) | |
| tree | e351ea0d8d6229446d39e6cafceb4e51c1d8d387 /kernel/timer.c | |
| parent | 1aa3f1a3a6b35843dc824e8aaad6420d476e5dcd (diff) | |
| download | linux-fsl-qoriq-0623bc2dddc5fef9659d652cede0af467e437473.tar.xz | |
timer-handle-idle-trylock-in-get-next-timer-irq.patch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/timer.c')
| -rw-r--r-- | kernel/timer.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index f04db01..abfa2e4 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1386,9 +1386,10 @@ unsigned long get_next_timer_interrupt(unsigned long now) /* * On PREEMPT_RT we cannot sleep here. If the trylock does not * succeed then we return the worst-case 'expires in 1 tick' - * value: + * value. We use the rt functions here directly to avoid a + * migrate_disable() call. */ - if (!spin_trylock(&base->lock)) + if (!spin_do_trylock(&base->lock)) return now + 1; #else spin_lock(&base->lock); @@ -1398,7 +1399,11 @@ unsigned long get_next_timer_interrupt(unsigned long now) base->next_timer = __next_timer_interrupt(base); expires = base->next_timer; } +#ifdef CONFIG_PREEMPT_RT_FULL + rt_spin_unlock(&base->lock); +#else spin_unlock(&base->lock); +#endif if (time_before_eq(expires, now)) return now; |