We run all handlers with interrupts disabled and expect them not to enable them. Warn when we catch one who does. Signed-off-by: Thomas Gleixner --- kernel/irq/handle.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Index: linux-2.6-tip/kernel/irq/handle.c =================================================================== --- linux-2.6-tip.orig/kernel/irq/handle.c +++ linux-2.6-tip/kernel/irq/handle.c @@ -68,6 +68,9 @@ irqreturn_t handle_IRQ_event(unsigned in ret = action->handler(irq, action->dev_id); trace_irq_handler_exit(irq, action, ret); + if (WARN_ON_ONCE(!irqs_disabled())) + local_irq_disable(); + switch (ret) { case IRQ_WAKE_THREAD: /* @@ -114,7 +117,6 @@ irqreturn_t handle_IRQ_event(unsigned in if (status & IRQF_SAMPLE_RANDOM) add_interrupt_randomness(irq); - local_irq_disable(); return retval; }