diff --git a/sys/compat/linuxkpi/common/include/linux/irq_work.h b/sys/compat/linuxkpi/common/include/linux/irq_work.h
--- a/sys/compat/linuxkpi/common/include/linux/irq_work.h
+++ b/sys/compat/linuxkpi/common/include/linux/irq_work.h
@@ -64,4 +64,10 @@
 	taskqueue_enqueue(linux_irq_work_tq, &irqw->irq_task);
 }
 
+static inline void
+irq_work_sync(struct irq_work *irqw)
+{
+	taskqueue_drain(linux_irq_work_tq, &irqw->irq_task);
+}
+
 #endif /* __LINUX_IRQ_WORK_H__ */