diff options
| -rw-r--r-- | block/blk-core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 362d0a55b07a..4623de79effa 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -456,6 +456,12 @@ struct request_queue *blk_alloc_queue(struct queue_limits *lim, int node_id) lockdep_init_map(&q->q_lockdep_map, "&q->q_usage_counter(queue)", &q->q_lock_cls_key, 0); + /* Teach lockdep about lock ordering (reclaim WRT queue freeze lock). */ + fs_reclaim_acquire(GFP_KERNEL); + rwsem_acquire_read(&q->io_lockdep_map, 0, 0, _RET_IP_); + rwsem_release(&q->io_lockdep_map, _RET_IP_); + fs_reclaim_release(GFP_KERNEL); + q->nr_requests = BLKDEV_DEFAULT_RQ; return q; |