diff options
Diffstat (limited to 'kernel/timer.c')
| -rw-r--r-- | kernel/timer.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index 9199f3c52215..ee305c8d4e18 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -750,13 +750,18 @@ unsigned long apply_slack(struct timer_list *timer, unsigned long expires) unsigned long expires_limit, mask; int bit; - expires_limit = expires + timer->slack; + expires_limit = expires; - if (timer->slack < 0) /* auto slack: use 0.4% */ - expires_limit = expires + (expires - jiffies)/256; + if (timer->slack >= 0) { + expires_limit = expires + timer->slack; + } else { + unsigned long now = jiffies; + /* No slack, if already expired else auto slack 0.4% */ + if (time_after(expires, now)) + expires_limit = expires + (expires - now)/256; + } mask = expires ^ expires_limit; - if (mask == 0) return expires; @@ -1679,11 +1684,14 @@ static int __cpuinit timer_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu) { long cpu = (long)hcpu; + int err; + switch(action) { case CPU_UP_PREPARE: case CPU_UP_PREPARE_FROZEN: - if (init_timers_cpu(cpu) < 0) - return NOTIFY_BAD; + err = init_timers_cpu(cpu); + if (err < 0) + return notifier_from_errno(err); break; #ifdef CONFIG_HOTPLUG_CPU case CPU_DEAD: @@ -1709,7 +1717,7 @@ void __init init_timers(void) init_timer_stats(); - BUG_ON(err == NOTIFY_BAD); + BUG_ON(err != NOTIFY_OK); register_cpu_notifier(&timers_nb); open_softirq(TIMER_SOFTIRQ, run_timer_softirq); } |