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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-11 10:53:50 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-11 10:53:50 -0800 |
| commit | f21f237cf55494c3a4209de323281a3b0528da10 (patch) | |
| tree | 40ebad408aebbc5bf4e54bd51a7c0077ad04508b /kernel/hrtimer.c | |
| parent | 2f96cb57cde9957bac0991c712068d29364b2ac9 (diff) | |
| parent | 5d5254f0d3b9bebc47d97e357374c0ad0c291a7d (diff) | |
| download | kernel-crypto-f21f237cf55494c3a4209de323281a3b0528da10.tar.gz kernel-crypto-f21f237cf55494c3a4209de323281a3b0528da10.tar.xz kernel-crypto-f21f237cf55494c3a4209de323281a3b0528da10.zip | |
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: handle HRTIMER_CB_IRQSAFE_UNLOCKED correctly from softirq context
nohz: disable tick_nohz_kick_tick() for now
irq: call __irq_enter() before calling the tick_idle_check
x86: HPET: enter hpet_interrupt_handler with interrupts disabled
x86: HPET: read from HPET_Tn_CMP() not HPET_T0_CMP
x86: HPET: convert WARN_ON to WARN_ON_ONCE
Diffstat (limited to 'kernel/hrtimer.c')
| -rw-r--r-- | kernel/hrtimer.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 2b465dfde42..95d3949f2ae 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -1209,6 +1209,7 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base) enum hrtimer_restart (*fn)(struct hrtimer *); struct hrtimer *timer; int restart; + int emulate_hardirq_ctx = 0; timer = list_entry(cpu_base->cb_pending.next, struct hrtimer, cb_entry); @@ -1217,10 +1218,24 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base) timer_stats_account_hrtimer(timer); fn = timer->function; + /* + * A timer might have been added to the cb_pending list + * when it was migrated during a cpu-offline operation. + * Emulate hardirq context for such timers. + */ + if (timer->cb_mode == HRTIMER_CB_IRQSAFE_PERCPU || + timer->cb_mode == HRTIMER_CB_IRQSAFE_UNLOCKED) + emulate_hardirq_ctx = 1; + __remove_hrtimer(timer, timer->base, HRTIMER_STATE_CALLBACK, 0); spin_unlock_irq(&cpu_base->lock); - restart = fn(timer); + if (unlikely(emulate_hardirq_ctx)) { + local_irq_disable(); + restart = fn(timer); + local_irq_enable(); + } else + restart = fn(timer); spin_lock_irq(&cpu_base->lock); |