Since blk_cleanup_queue() is called after blk_unregister_queue() and
since that last function removes all sysfs attributes, serializing
any code in blk_cleanup_queue() against sysfs callback methods nor against
I/O scheduler changes is necessary. Hence remove the syfs_lock locking
calls from the start of blk_cleanup_queue().
Cc: Christoph Hellwig <h...@infradead.org>
Cc: Ming Lei <ming....@redhat.com>
Cc: Hannes Reinecke <h...@suse.com>
Cc: Johannes Thumshirn <jthumsh...@suse.de>
Signed-off-by: Bart Van Assche <bvanass...@acm.org>
---
block/blk-core.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 8b51d9ec8ae3..ae506ac2dd48 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -339,13 +339,11 @@ void blk_cleanup_queue(struct request_queue *q)
WARN_ON_ONCE(blk_queue_registered(q));
/* mark @q DYING, no new request or merges will be allowed afterwards */
- mutex_lock(&q->sysfs_lock);
blk_set_queue_dying(q);
blk_queue_flag_set(QUEUE_FLAG_NOMERGES, q);
blk_queue_flag_set(QUEUE_FLAG_NOXMERGES, q);
blk_queue_flag_set(QUEUE_FLAG_DYING, q);
- mutex_unlock(&q->sysfs_lock);
/*
* Drain all requests queued before DYING marking. Set DEAD flag to
--
2.23.0.444.g18eeb5a265-goog
