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authorBart Van Assche <bvanassche@acm.org>2021-06-17 17:44:46 -0700
committerJens Axboe <axboe@kernel.dk>2021-06-21 15:03:40 -0600
commit3bd473f41ae990815d6f75d285b161eebf361278 (patch)
tree70fd10d2bedb20b1b8b0e08fa6747d08f25c0450 /block
parent46eae2e32a6adc368230b4df0501082c5233e99c (diff)
block/mq-deadline: Add two lockdep_assert_held() statements
Document the locking strategy by adding two lockdep_assert_held() statements. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Damien Le Moal <damien.lemoal@wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20210618004456.7280-7-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/mq-deadline.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 31418e9ce9e2..191ff5ce629c 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -279,6 +279,8 @@ static struct request *__dd_dispatch_request(struct deadline_data *dd)
bool reads, writes;
int data_dir;
+ lockdep_assert_held(&dd->lock);
+
if (!list_empty(&dd->dispatch)) {
rq = list_first_entry(&dd->dispatch, struct request, queuelist);
list_del_init(&rq->queuelist);
@@ -501,6 +503,8 @@ static void dd_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
struct deadline_data *dd = q->elevator->elevator_data;
const int data_dir = rq_data_dir(rq);
+ lockdep_assert_held(&dd->lock);
+
/*
* This may be a requeue of a write request that has locked its
* target zone. If it is the case, this releases the zone lock.