diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-19 09:47:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-19 09:47:18 -0800 |
| commit | 3cd312c3e887b4bee2d94668a481b3d19c07732c (patch) | |
| tree | c8978186da2155f7752de79a2cd5b59e3e298ce8 /kernel/time | |
| parent | ecd5907a200b18aeddac68b8c734b8ad4c931205 (diff) | |
| parent | cf1e367ee84e02ac349ad0858eb65e8a6a511c8b (diff) | |
Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
timers: Remove duplicate setting of new_base in __mod_timer()
clockevents: Prevent clockevent_devices list corruption on cpu hotplug
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/clockevents.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 3d5fc0fd1cc..6f740d9f094 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -238,8 +238,9 @@ void clockevents_exchange_device(struct clock_event_device *old, */ void clockevents_notify(unsigned long reason, void *arg) { - struct list_head *node, *tmp; + struct clock_event_device *dev, *tmp; unsigned long flags; + int cpu; raw_spin_lock_irqsave(&clockevents_lock, flags); clockevents_do_notify(reason, arg); @@ -250,8 +251,19 @@ void clockevents_notify(unsigned long reason, void *arg) * Unregister the clock event devices which were * released from the users in the notify chain. */ - list_for_each_safe(node, tmp, &clockevents_released) - list_del(node); + list_for_each_entry_safe(dev, tmp, &clockevents_released, list) + list_del(&dev->list); + /* + * Now check whether the CPU has left unused per cpu devices + */ + cpu = *((int *)arg); + list_for_each_entry_safe(dev, tmp, &clockevent_devices, list) { + if (cpumask_test_cpu(cpu, dev->cpumask) && + cpumask_weight(dev->cpumask) == 1) { + BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED); + list_del(&dev->list); + } + } break; default: break; |