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rangetimer: fix BUG_ON reported by Ingo 

There's a small race/chance that, while hrtimers are enabled globally,
they're later not enabled when we're calling the hrtimer_interrupt() function,
which then BUG_ON()'s for that. This patch closes that race/gap.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
This commit is contained in:
Arjan van de Ven 2008-10-11 12:25:45 -07:00
parent 2075eb8d95
commit 030aebd2e4
1 changed files with 5 additions and 1 deletions
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6
kernel/hrtimer.c
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@ -1395,11 +1395,15 @@ void hrtimer_peek_ahead_timers(void)
unsigned long flags; unsigned long flags;
struct tick_device *td; struct tick_device *td;
struct clock_event_device *dev; struct clock_event_device *dev;
struct hrtimer_cpu_base *cpu_base;
if (hrtimer_hres_active()) if (hrtimer_hres_active())
return; return;
local_irq_save(flags); local_irq_save(flags);
cpu_base = &__get_cpu_var(hrtimer_bases);
if (!cpu_base->hres_active)
goto out;
td = &__get_cpu_var(tick_cpu_device); td = &__get_cpu_var(tick_cpu_device);
if (!td) if (!td)
goto out; goto out;