From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 9 Jan 2018 12:20:51 -0700
Subject: [PATCH] bfq-iosched: don't call bfqg_and_blkg_put for
 !CONFIG_BFQ_GROUP_IOSCHED
Git-commit: 8abef10b3de1144cfe968f454946f13eb1ac3d0a
Patch-mainline: v4.16-rc1
References: bsc#1104967,FATE#325924

It's not available if we don't have group io scheduling set, and
there's no need to call it.

Fixes: 0d52af590552 ("block, bfq: release oom-queue ref to root group on exit")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 block/bfq-iosched.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 7c0b7f60811c..5e6f837f663e 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -4893,10 +4893,10 @@ static void bfq_exit_queue(struct elevator_queue *e)
 
 	hrtimer_cancel(&bfqd->idle_slice_timer);
 
+#ifdef CONFIG_BFQ_GROUP_IOSCHED
 	/* release oom-queue reference to root group */
 	bfqg_and_blkg_put(bfqd->root_group);
 
-#ifdef CONFIG_BFQ_GROUP_IOSCHED
 	blkcg_deactivate_policy(bfqd->queue, &blkcg_policy_bfq);
 #else
 	spin_lock_irq(&bfqd->lock);
-- 
2.16.4