The CPU_STARTING notifiers are supposed to be run with irqs disabled. But the perf_cpu_notifier() macro invokes them without doing that. Fix it.
Signed-off-by: Srivatsa S. Bhat <[email protected]> --- include/linux/perf_event.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 7602ccb..cc4574d 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1346,10 +1346,13 @@ static inline void perf_event_task_tick(void) { } do { \ static struct notifier_block fn##_nb __cpuinitdata = \ { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ + unsigned long flags; \ fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ (void *)(unsigned long)smp_processor_id()); \ + local_irq_save(flags); \ fn(&fn##_nb, (unsigned long)CPU_STARTING, \ (void *)(unsigned long)smp_processor_id()); \ + local_irq_restore(flags); \ fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ (void *)(unsigned long)smp_processor_id()); \ register_cpu_notifier(&fn##_nb); \ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
