diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index a6b9a33db657..7d095c0add25 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1384,8 +1384,19 @@ void vmbus_isr(void) if (IS_ENABLED(CONFIG_PREEMPT_RT)) { vmbus_irqd_wake(); } else { - lockdep_hardirq_threaded(); + static DEFINE_WAIT_OVERRIDE_MAP(vmbus_map, LD_WAIT_CONFIG); + + /* + * vmbus_isr is never force-threaded and always invoked at hard + * IRQ level. __vmbus_isr() below can acquire a spinlock_t + * which becomes a sleeping lock and must not be acquired in + * this context. Therefore on PREEMPT_RT this will be threaded + * via vmbus_irqd_wake(). On non-PREEMPT the annotation lets + * lockdep know that acquiring a spinlock_t is not an issue. + */ + lock_map_acquire_try(&vmbus_map); __vmbus_isr(); + lock_map_release(&vmbus_map); } } EXPORT_SYMBOL_FOR_MODULES(vmbus_isr, "mshv_vtl");