+
+ /* Call unregister_page_fault_notifier()
+ * if no probes are active
+ */
+ mutex_lock(&kprobe_mutex);
+ if (atomic_add_return(-1, &kprobe_count) == \
+ ARCH_INACTIVE_KPROBE_COUNT)
+ unregister_page_fault_notifier(&kprobe_page_fault_nb);
+ mutex_unlock(&kprobe_mutex);
+ return;