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FROMGIT: block/mq-deadline: Add two lockdep_assert_held() statements

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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>
BUG: 187357408
Change-Id: Ie8cf0b0ae208c9cc87731a9c6d7df5e5e59332d5
(cherry picked from commit 91831ddfd7c6e3df9857526a76cfa88673ec0637 git://git.kernel.dk/linux-block/ for-5.14/block)
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bart Van Assche
2021-05-19 16:16:06 -07:00
committed by Todd Kjos
parent dfc5e14a36
commit d0d50fe4b4
1 changed files with 4 additions and 0 deletions
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4
block/mq-deadline.c
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@@ -277,6 +277,8 @@ 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);
@@ -499,6 +501,8 @@ 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.