diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index c04d16b02225bf3a4893aa2ec700cede4f7792ba..ce9b35a9468eb3816dc9bbfbf66e9d20b17d7cca 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -464,6 +464,7 @@ void ioc_cgroup_changed(struct io_context *ioc)
 	ioc_set_changed(ioc, ICQ_CGROUP_CHANGED);
 	spin_unlock_irqrestore(&ioc->lock, flags);
 }
+EXPORT_SYMBOL(ioc_cgroup_changed);
 
 static int __init blk_ioc_init(void)
 {