diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 9610b07..eee03a3 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -3541,9 +3541,7 @@
 		INIT_LIST_HEAD(&per_cpu(blk_cpu_done, i));
 
 	open_softirq(BLOCK_SOFTIRQ, blk_done_softirq, NULL);
-#ifdef CONFIG_HOTPLUG_CPU
-	register_cpu_notifier(&blk_cpu_notifier);
-#endif
+	register_hotcpu_notifier(&blk_cpu_notifier);
 
 	blk_max_low_pfn = max_low_pfn;
 	blk_max_pfn = max_pfn;