[PATCH 4/6] blk-iolatency: splict blkcg_iolatency_free() from blkcg_iolatency_exit()

[Yu Kuai]

Prepare to split 'kfree(blkiolat)' from blkcg_iolatency_exit(), no
functional changes.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 block/blk-iolatency.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index c0545f9da549..f3b8848e6a46 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -648,10 +648,18 @@ static void blkcg_iolatency_exit(struct rq_qos *rqos)
 	kfree(blkiolat);
 }
 
+static void blkcg_iolatency_free(struct rq_qos *rqos)
+{
+	struct blk_iolatency *blkiolat = BLKIOLATENCY(rqos);
+
+	kfree(blkiolat);
+}
+
 static struct rq_qos_ops blkcg_iolatency_ops = {
 	.throttle = blkcg_iolatency_throttle,
 	.done_bio = blkcg_iolatency_done_bio,
 	.exit = blkcg_iolatency_exit,
+	.free = blkcg_iolatency_free,
 };
 
 static void blkiolatency_timer_fn(struct timer_list *t)
-- 
2.31.1